Spec Miata Community   
search | help | calendar | games | forum home

  next oldest topic   next newest topic
» Hello Spec Miata Community » SpecMiata.com » Spec Miata Garage » Diagnose this front suspension vibration - play along!

 - Email this page to someone! | Subscribe To Topic  
Author Topic: Diagnose this front suspension vibration - play along!
dtfastbear Verified Driver Made Donation to Website
faster than the average bear...

Region: SFR / NorCal
Car #: 72
Year : 93
Posts: 1276
Status: Offline
Icon 1 posted  Profile for dtfastbear   Author's Homepage     Edit/Delete Post  Report this post to a Moderator

I already know the answer to this problem, but I want to share it with everyone so you don't suffer the same issues I did. But, I thought I'd make a game of it and give everyone 24 hours to weigh in with guesses of the cause...

Back at the NASA Nationals, I reported during the Championship race a high frequency steering wheel vibration during left hand turns that got more serious as the race went on.

I thought I'd blown my right front shock slamming my way through the Attitudes. I replaced both front shocks before my next event, and the problem went away. I turned my fastest laps ever at Infineon with my new shocks rebuilt by Bernie Stewart at SD.

So it's the first event of the year, and in my first dry session on Saturday, I'm getting a VERY strong vibration in the steering wheel on left hand turns, and it feels like the front right wheel is "hopping" the whole way through the turn. My grip in left turns is absolutely degraded. There's no vibration in a straight line and no vibration in right turns. The vibration is so bad in some turns that it feels like it's going to rip the steering wheel out of my hand. My times are a few seconds of my normal lap times.

Any guesses at this point?

I checked the hubs (both sides) and they feel absolutely fine.

I do the "bounce test" of the shocks by just pushing down quickly on each front fender and everything appears normal.

I check the play in the upper and lower ball joints on the right side, and everything looks fine. Left too.

We check the eccentrics to make sure they're tight on the right front lower control arm, and it seems like there's some play in the rear bushing.

So, we change the lower control arm for another used control arm.

I go back out in the next race and the problem is still terrible, so I don't even race and come back to the pits. "It must be that front right shock! It's blown again!"

The next morning, I replace the front right shock with a known good one, and send my wife out for the first practice session. The problem is still there, and just as bad as it was before.

Any guesses now? It was at this point that my buddy Scott Miller discovered the problem, and we were able to fix it with the parts and tools on hand before the next session.

Check back tomorrow for the solution...

Happy guessing! I'm happy to answer questions.

Dean

--------------------
NASA Nor Cal SM series Director
www.molaps.com

Winner - Ford Racing Mustang Challenge Driver Shootout

Evil Genius Racing / Race Engineering / Stewart Development

Todd Lamb Verified Driver Made Donation to Website Series Champ
Playboy Mazda MX-5 Cup Champion 2009

Region: SE Div, Atlanta
Car #: EddieFur
Year : Party like it's ____
Posts: 952
Status: Offline
Icon 1 posted  Profile for Todd Lamb   Author's Homepage     Edit/Delete Post  Report this post to a Moderator

The info above doesn't rule out a rim problem.

But either way, good call having your wife go out and shake down the car, no pun intended. [Big Grin]

--------------------
Mazdaspeed // SafeRacer // Traqmate // OPM Autosports // East Street Auto // Cobalt Friction
Racers Edge Motorsports Rolex GT RX-8 // i-MOTO Racing Conti Challenge MAZDASPEED3
Twitter: http://www.twitter.com/toddspeed

dtfastbear Verified Driver Made Donation to Website
faster than the average bear...

Region: SFR / NorCal
Car #: 72
Year : 93
Posts: 1276
Status: Offline
Icon 1 posted  Profile for dtfastbear   Author's Homepage     Edit/Delete Post  Report this post to a Moderator

.
quote:
Originally posted by Todd Lamb:

But either way, good call having your wife go out and shake down the car

Ha!

Oh yeah - good point, Todd. I forgot to mention we had both front wheels checked for balance after my very first session the vibration appeared.

Next guess?

--------------------
NASA Nor Cal SM series Director
www.molaps.com

Winner - Ford Racing Mustang Challenge Driver Shootout

Evil Genius Racing / Race Engineering / Stewart Development

Tyler Dahl Verified Driver Series Champ
Member

Region: Utah
Car #: 70
Year : 1991
Posts: 169
Status: Offline
Icon 1 posted  Profile for Tyler Dahl     Edit/Delete Post  Report this post to a Moderator

Loose Tie Rod end.

--------------------
Tyler Dahl
Race Engineering
Miatacage.com
Carbotech

dtfastbear Verified Driver Made Donation to Website
faster than the average bear...

Region: SFR / NorCal
Car #: 72
Year : 93
Posts: 1276
Status: Offline
Icon 1 posted  Profile for dtfastbear   Author's Homepage     Edit/Delete Post  Report this post to a Moderator

Good guess. One we also thought of and checked. We were very thorough to look for play in hubs on both sides, tie rod ends on both sides, the steering rack, ball joints, etc. We spent a lot of time with the car up in the air, someone hanging on to the steering wheel while we pryed, pulled and shook every moving part side to side in and around the control arms, bushings and steering components to find some play. We couldn't find anything loose.

Dean

--------------------
NASA Nor Cal SM series Director
www.molaps.com

Winner - Ford Racing Mustang Challenge Driver Shootout

Evil Genius Racing / Race Engineering / Stewart Development

Blix Verified Driver
Veteran Member

Region: NER
Car #: 12
Year : 1990
Posts: 830
Status: Offline
Icon 1 posted  Profile for Blix     Edit/Delete Post  Report this post to a Moderator

improperly tuned spacers between the seat and steering wheel?

--------------------
Eric
http://www.hale-motorsports.com
For all your Mazda and Mustang needs

pat slattery Verified Driver Made Donation to Website
Veteran Member

Region: cincy
Car #: 79
Year : 92
Posts: 1495
Status: Offline
Icon 1 posted  Profile for pat slattery     Edit/Delete Post  Report this post to a Moderator

Motor mount issue?

Pat

--------------------
keeping the faith for the 1.6

Arrow Karts

Jeff Brugger Verified Driver
Member

Region: SEDIV - Atlanta
Car #: 00
Year : 94
Posts: 11
Status: Offline
Icon 1 posted  Profile for Jeff Brugger     Edit/Delete Post  Report this post to a Moderator

Ride height too low. Right front tire rubs

dtfastbear Verified Driver Made Donation to Website
faster than the average bear...

Region: SFR / NorCal
Car #: 72
Year : 93
Posts: 1276
Status: Offline
Icon 1 posted  Profile for dtfastbear   Author's Homepage     Edit/Delete Post  Report this post to a Moderator

quote:
Originally posted by Blix:
improperly tuned spacers between the seat and steering wheel?

That's a constant problem with our car, and we've been unable to fix it for years. We've just learned to live with that issue.

--------------------
NASA Nor Cal SM series Director
www.molaps.com

Winner - Ford Racing Mustang Challenge Driver Shootout

Evil Genius Racing / Race Engineering / Stewart Development

Louis Interdonato
Member

Region: wdc
Car #: 90
Year : 93
Posts: 1132
Status: Offline
Icon 1 posted  Profile for Louis Interdonato     Edit/Delete Post  Report this post to a Moderator

Loose sway bar bracket?

--------------------
WDCR SM # 90 http://www.rpperformanceracing.com/

dtfastbear Verified Driver Made Donation to Website
faster than the average bear...

Region: SFR / NorCal
Car #: 72
Year : 93
Posts: 1276
Status: Offline
Icon 1 posted  Profile for dtfastbear   Author's Homepage     Edit/Delete Post  Report this post to a Moderator

Another good guess. We, too, thought about the motor mount issue. We checked that all the bolts were tight (both sides of the engine), but that was about it. That didn't turn out to be the cause.

Ride height is set with about a finger-thickness between bottom of the Fat Cat bump-stop and the top of the shock body. The front right tire did rub the fender a teeny bit in some of the uphill left turns, but that wasn't the cause.

Another clue - we noticed that the front swaybar had a pretty significant amount of twist/bind in it with the car in the air as we were messing around with checking everything else for play. That is, the end links weren't "free" as I'd expect them with the car level in the air. That puzzled me a bit, as I am always very careful after corner-balancing the car to reconnect the swaybars and make sure there's no twist with the car on the ground. That turned out to be a clue, but not the cause. And, because we're a little thick in the head, we didn't investigate any further as to why that would be the case.

Cheers,

Dean

--------------------
NASA Nor Cal SM series Director
www.molaps.com

Winner - Ford Racing Mustang Challenge Driver Shootout

Evil Genius Racing / Race Engineering / Stewart Development

dtfastbear Verified Driver Made Donation to Website
faster than the average bear...

Region: SFR / NorCal
Car #: 72
Year : 93
Posts: 1276
Status: Offline
Icon 1 posted  Profile for dtfastbear   Author's Homepage     Edit/Delete Post  Report this post to a Moderator

Loose sway bar bracket - as we eliminated other things and we found the "twist" mentioned above in the swaybar, we took a really close look at the brackets, too. They were fine. The swaybar itself did not appear to be twisted/bent either.

You guys are all validating our train of thought... who's going to get it??

--------------------
NASA Nor Cal SM series Director
www.molaps.com

Winner - Ford Racing Mustang Challenge Driver Shootout

Evil Genius Racing / Race Engineering / Stewart Development

Dusty Bottoms Verified Driver Made Donation to Website
99 all the way!

Region: Lone Star
Year : 1990
Posts: 4253
Status: Offline
Icon 1 posted  Profile for Dusty Bottoms     Edit/Delete Post  Report this post to a Moderator

Something broken/cracked, spring, shock top, the plate on the inner fender well but you had to have missed that when changing the shocks so I give that little chance of being the right answer. I look forward to seeing the answer.

--------------------
"Your victory is tainted! Asterisk! Asterisk!!!"--Lisa Simpson

Keith in WA Verified Driver Made Donation to Website
Pack Fodder

Region: NWR / Oregon
Car #: 88
Year : 95
Posts: 2000
Status: Offline
Icon 1 posted  Profile for Keith in WA     Edit/Delete Post  Report this post to a Moderator

One of your front springs didn't happen to look a lot like one of your rear springs did it?

--------------------
Keith Novak
(Will work for tires)

Tom's Double O Verified Driver
Member

Region: Oregon
Car #: 00
Year : 1992
Posts: 294
Status: Offline
Icon 1 posted  Profile for Tom's Double O     Edit/Delete Post  Report this post to a Moderator

Was the sway bar rubbing on the suspension?

While setting up my car this weekend I noticed the end links are too long and are just about touching the upper arm. There are marks/wear on the upper arm where it rubs/hits. The end links were adjusted as short as they can go so I cut them shorter so they will no longer rub or touch the upper arm.

Tom

Drago Verified Driver Made Donation to Website Series Champ
MegaModerator

Region: mid south
Car #: 2
Year : 1999
Posts: 4275
Status: Offline
Icon 1 posted  Profile for Drago   Author's Homepage     Edit/Delete Post  Report this post to a Moderator

quote:
Originally posted by Todd Lamb:
The info above doesn't rule out a rim problem.

But either way, good call having your wife go out and shake down the car, no pun intended. [Big Grin]

lmfao!

--------------------
Jim Drago
East Street Auto Salvage
jdrago1@aol.com
2006-2007 Mid-West Division
07,09 June Sprints Champion

EAST STREET RACING

DionJ Verified Driver
Member

Region: SF
Car #: 68
Year : 91
Posts: 186
Status: Offline
Icon 1 posted  Profile for DionJ     Edit/Delete Post  Report this post to a Moderator

Come on Dean my head is hurting...Your sway bar was binding and lifting the tire?

Muda Verified Driver Made Donation to Website
ComingToAMirrorNearYou

Region: WDC
Car #: #23
Year : 1991
Posts: 642
Status: Offline
Icon 1 posted  Profile for Muda     Edit/Delete Post  Report this post to a Moderator

Loose subframe?

--------------------
Muda Motorsports
"We're all here 'cause we're not all there."

mtm68 Verified Driver
Member

Region: CalClub/ SFR
Car #: 67
Year : 1990
Posts: 252
Status: Offline
Icon 1 posted  Profile for mtm68     Edit/Delete Post  Report this post to a Moderator

oooh, oooh, I know, I know!


[Wink]

edit: my guess... this car didn't like that it didn't have an official beer sponsor.... unlike Great White, the official beer of Edward.

Marcus

cam Verified Driver
Cheap member

Region: southwest
Car #: 14
Year : 90
Posts: 739
Status: Offline
Icon 1 posted  Profile for cam   Author's Homepage     Edit/Delete Post  Report this post to a Moderator

OK, I'll play along with a guess. Since the problem is centric on left hand turns, which supposedly loads the right side suspension, I'm guessing that the front upper right control arm was bent and binding against the front sway bar on the right hand side, causing both an odd vibration and loss of traction or how about blown front right shock hat. Iíll check back tomorrow to find the real solution.

--------------------
"The problem with Socialism is that you eventually run out of other people's money."
~Prime Minister Margaret Thatcher
"A government big enough to give you everything you want, is strong enough to take everything you have."
~Thomas Jefferson

dtfastbear Verified Driver Made Donation to Website
faster than the average bear...

Region: SFR / NorCal
Car #: 72
Year : 93
Posts: 1276
Status: Offline
Icon 1 posted  Profile for dtfastbear   Author's Homepage     Edit/Delete Post  Report this post to a Moderator

quote:
Originally posted by Keith in WA:
One of your front springs didn't happen to look a lot like one of your rear springs did it?

Not this time, but we DID have that problem on the first SM we bought many years ago. Raced most of a season with a front spring in the back, and a back spring in the front...

Dusty Bottoms is probably the closest so far. I'll give you all another hint. I obviously corrected the problem when I changed the front shocks, but the problem reappeared. The problem was NOT that the shock was blown.

Loose subframe - another good guess. I say it's a good guess because it's something we thought of and checked. Not loose, though.

Swaybar binding/hitting the control arm - not the cause, but I believe the swaybar seeming to be "twisted" is the thing that SHOULD have led us to the solution faster.

And my buddy Scott Miller reminded my that our other friend, Aaron Braverman, was actually the one that pointed us away from the right side of the car which actually led us to the problem. <<<---- Another big hint.

--------------------
NASA Nor Cal SM series Director
www.molaps.com

Winner - Ford Racing Mustang Challenge Driver Shootout

Evil Genius Racing / Race Engineering / Stewart Development

dtfastbear Verified Driver Made Donation to Website
faster than the average bear...

Region: SFR / NorCal
Car #: 72
Year : 93
Posts: 1276
Status: Offline
Icon 1 posted  Profile for dtfastbear   Author's Homepage     Edit/Delete Post  Report this post to a Moderator

Cam - another good guess. We didn't actually change out the upper control arm, since we kept coming up with other little things to try, but that would have been a good thing to look at. If the upper control arm had a reduced range of motion and the spring rate went to infinity, the tire could have started skipping, I guess...

Not the cause this time, though!

--------------------
NASA Nor Cal SM series Director
www.molaps.com

Winner - Ford Racing Mustang Challenge Driver Shootout

Evil Genius Racing / Race Engineering / Stewart Development

Ken SM-94 Verified Driver
Veteran Member

Region: Oregon
Car #: 94
Year : 91
Posts: 971
Status: Offline
Icon 1 posted  Profile for Ken SM-94   Author's Homepage     Edit/Delete Post  Report this post to a Moderator

Pot holes in all the left handers? [Big Grin]

Pat Newton Verified Driver Made Donation to Website
Enduro addict

Region: Northwest, Oregon
Car #: 79
Year : 90
Posts: 3336
Status: Offline
Icon 1 posted  Profile for Pat Newton   Author's Homepage     Edit/Delete Post  Report this post to a Moderator

I have no idea about the problem and look forward to the answer, but this is just one more reason to always have Scott Miller nearby when you're playing with race cars. [yep]

(Marcus is good when you're playing with wine and seared/smoked animals...)

--------------------
Crew Chief, 3D Racing #64, aka Team Scrappy 2.0
3rd place E2, 2009 25 Hours of Thunderhill

Crew Chief, EGR/Miller Motorsports #64, aka Team Scrappy
E2 Champions, 2008 25 Hours of Thunderhill

Glenn Verified Driver
Member

Region: CCR
Posts: 581
Status: Offline
Icon 1 posted  Profile for Glenn     Edit/Delete Post  Report this post to a Moderator

Left side top A arm bolt loose.

--------------------
Glenn
Crew chief Meathead Racing, NE Region Sales Division Race Engineering, The GOLD standard in SM engines, Occasional race slave for OPM Autosports

Dusty Bottoms Verified Driver Made Donation to Website
99 all the way!

Region: Lone Star
Year : 1990
Posts: 4253
Status: Offline
Icon 1 posted  Profile for Dusty Bottoms     Edit/Delete Post  Report this post to a Moderator

Left side coilover sleeve in backwards and was slipping past the retainer ring at some point but was reset when you changed the left side shock?

--------------------
"Your victory is tainted! Asterisk! Asterisk!!!"--Lisa Simpson

David Dewhurst
Veteran Member

Posts: 574
Status: Offline
Icon 1 posted  Profile for David Dewhurst     Edit/Delete Post  Report this post to a Moderator

Shock hat/washer issue.

--------------------
Have Fun [Wink]

David Dewhurst
CenDiv
Milwaukee Region
Spec Miata #14

Eric Richter Verified Driver Made Donation to Website
Member

Region: So Cal
Car #: #29
Year : 1993
Posts: 232
Status: Offline
Icon 1 posted  Profile for Eric Richter     Edit/Delete Post  Report this post to a Moderator

OK, it's tomorrow, what's the answer?

--------------------
2009 SoCal SCCA SM Champion
"Only boring people get bored"

dtfastbear Verified Driver Made Donation to Website
faster than the average bear...

Region: SFR / NorCal
Car #: 72
Year : 93
Posts: 1276
Status: Offline
Icon 1 posted  Profile for dtfastbear   Author's Homepage     Edit/Delete Post  Report this post to a Moderator

Dewhurst is getting so close! Care to expand??

--------------------
NASA Nor Cal SM series Director
www.molaps.com

Winner - Ford Racing Mustang Challenge Driver Shootout

Evil Genius Racing / Race Engineering / Stewart Development

dtfastbear Verified Driver Made Donation to Website
faster than the average bear...

Region: SFR / NorCal
Car #: 72
Year : 93
Posts: 1276
Status: Offline
Icon 1 posted  Profile for dtfastbear   Author's Homepage     Edit/Delete Post  Report this post to a Moderator

I did say 24 hours... but I might as well spill the beans.

I'd have to say that Dewhurst is the closest to the right answer. But the key here is that even though the symptoms were evident in LEFT turns and it really felt like the right front tires was hopping, the problem existed on the left side.

It turns out that the top nut on my LEFT front shock had backed almost completely off - it was hanging just by a couple threads. This was hidden by my intake which I have wrapped with thick insulation.

When the left side was in droop in left turns, the wheel essentially had no damping since the shock was loose, hence the hopping. But, the way the vibration came through the steering wheel and car, it really felt like the problem originated on the right side.

So, when the car was on the ground, the "shock bump test" didn't show any symptoms because the shock was in compression. With the suspension in full compression or in full droop, the shock never felt loose. We would have had to look directly at the top nut with the car on the ground.

When the car was in the air, I believe that the left side was hanging down just a little more than the right since the top nut was backed off almost all the way, which is what caused the twist in the sway bar.

So, putting an impact gun to the top nut solved the problem instantly. I checked the rears, and both of them weren't as tight as they should have been, but they weren't completely loose.

My friend Scott DeWinter recommended using set screws in the top of the Fat Cat top nuts to keep them from backing off. I've already ordered some appropriate set screws from McMaster.

Thanks for playing along, and CHECK THOSE FAT CAT TOP NUTS!

Cheers,

Dean

--------------------
NASA Nor Cal SM series Director
www.molaps.com

Winner - Ford Racing Mustang Challenge Driver Shootout

Evil Genius Racing / Race Engineering / Stewart Development

Eric Richter Verified Driver Made Donation to Website
Member

Region: So Cal
Car #: #29
Year : 1993
Posts: 232
Status: Offline
Icon 1 posted  Profile for Eric Richter     Edit/Delete Post  Report this post to a Moderator

Thanks Dean, excellent post. We should have more of these.

--------------------
2009 SoCal SCCA SM Champion
"Only boring people get bored"

Glenn Verified Driver
Member

Region: CCR
Posts: 581
Status: Offline
Icon 1 posted  Profile for Glenn     Edit/Delete Post  Report this post to a Moderator

Thanks for that info!. I disassembled a set this weekend and will pay close attenetion at the track for the issue with my drivers.

--------------------
Glenn
Crew chief Meathead Racing, NE Region Sales Division Race Engineering, The GOLD standard in SM engines, Occasional race slave for OPM Autosports

pat slattery Verified Driver Made Donation to Website
Veteran Member

Region: cincy
Car #: 79
Year : 92
Posts: 1495
Status: Offline
Icon 1 posted  Profile for pat slattery     Edit/Delete Post  Report this post to a Moderator

That was fun and interesting.

Pat

--------------------
keeping the faith for the 1.6

Arrow Karts

d mathias Verified Driver Made Donation to Website
Member

Region: OVR
Car #: 88
Year : 1991
Posts: 2401
Status: Offline
Icon 1 posted  Profile for d mathias     Edit/Delete Post  Report this post to a Moderator

Note to self: check fat cat's nuts.

Drago Verified Driver Made Donation to Website Series Champ
MegaModerator

Region: mid south
Car #: 2
Year : 1999
Posts: 4275
Status: Offline
Icon 1 posted  Profile for Drago   Author's Homepage     Edit/Delete Post  Report this post to a Moderator

quote:
Originally posted by dtfastbear:
I did say 24 hours... but I might as well spill the beans.

When the left side was in droop in left turns, the wheel essentially had no damping since the shock was loose, hence the hopping. But, the way the vibration came through the steering wheel and car, it really felt like the problem originated on the right side.

Dean

Dean
Nice to know I am not the only %$^&* driver out there! [Big Grin]
I had a similar problem...
I was at Hallett a few years ago, mostly all lefts and I am usually pretty good there, but my weekend started getting bad almost instantly. IT1 is real fast left hander, I am usually as good or better than most there, this year I was getting beat there and was not sure why?
Later in the weekend in qualifying, I felt weird vibration in most lefts, more in the slower ones... We figured it was r/r, felt like R/r etc. We replaced shock and everything we could on that side before the race. I started fifth, got a great start and was p1 by T1 after Weise borrowed my starting/shifting technique from 07 Sprints [Big Grin] . the thing vibrated badly as I passed for the lead.. It got a little worse and then finally just vibrated the carp out of the car in every left turn. Turns out my l/r shocked poked threw the hat! I always go to the wrong side first! Same deal, when l/r was in droop, it would bounce up and down.
Great post and glad we use lock tight on fat cat nuts [Big Grin]

--------------------
Jim Drago
East Street Auto Salvage
jdrago1@aol.com
2006-2007 Mid-West Division
07,09 June Sprints Champion

EAST STREET RACING

davew Verified Driver Made Donation to Website
Veteran Member

Region: chicago
Car #: 72 and ?
Year : 90 and 90
Posts: 1051
Status: Offline
Icon 1 posted  Profile for davew   Author's Homepage     Edit/Delete Post  Report this post to a Moderator

I've been adding set screws to all my Fat Cat equiped cars since the first came out. In fact when I sell a kit, I install the screws.

Sorry to hear that they backed out on you, but glad th see I am not wasting set screws

Dave

--------------------
Advanced Autosports, The Midwests leader in Spec Miata Service, Parts and Rentals
608-313-1230
Authorised Spec Miata service center
www.advanced-autosports.com

Zauskycop Verified Driver
Member

Region: Chicago
Car #: 45
Year : 1991
Posts: 115
Status: Offline
Icon 1 posted  Profile for Zauskycop     Edit/Delete Post  Report this post to a Moderator

Okay...I will play. How do you add set screws to those? Put one down the middle of the threads as a "jam" bolt? Drill and tap?

Tracy Ramsey
Team Blenderblaster

--------------------
Tracy Ramsey
Team Blenderblaster

dtfastbear Verified Driver Made Donation to Website
faster than the average bear...

Region: SFR / NorCal
Car #: 72
Year : 93
Posts: 1276
Status: Offline
Icon 1 posted  Profile for dtfastbear   Author's Homepage     Edit/Delete Post  Report this post to a Moderator

McMaster-Carr part number is 99642A181, and they are M10X1.25 (thanks to Scott DeWinter)

The Fat Cat top nut is threaded inside the whole way through, so you screw this in the top to act as a jam against the top of the shock's shaft.

--------------------
NASA Nor Cal SM series Director
www.molaps.com

Winner - Ford Racing Mustang Challenge Driver Shootout

Evil Genius Racing / Race Engineering / Stewart Development

d mathias Verified Driver Made Donation to Website
Member

Region: OVR
Car #: 88
Year : 1991
Posts: 2401
Status: Offline
Icon 1 posted  Profile for d mathias     Edit/Delete Post  Report this post to a Moderator

When I installed the FC kit last year I noticed that I did not receive the set screws that were shown in the instructions. I emailed Shaikh, who replied that they were just for 'looks' and I didn't need them. So I lock-tited the threads and also painted a dot across the nut and washer so I can quickly visually inspect them.

dtfastbear Verified Driver Made Donation to Website
faster than the average bear...

Region: SFR / NorCal
Car #: 72
Year : 93
Posts: 1276
Status: Offline
Icon 1 posted  Profile for dtfastbear   Author's Homepage     Edit/Delete Post  Report this post to a Moderator

In all fairness to Shaikh, I did NOT loctite these top nuts. That very well may have prevented this problem from occuring.

CLEARLY I would have won the NASA Nationals had this not happened.... [Smile] [Smile]

Dean - who will be loctiting anything with threads in early September 2010

--------------------
NASA Nor Cal SM series Director
www.molaps.com

Winner - Ford Racing Mustang Challenge Driver Shootout

Evil Genius Racing / Race Engineering / Stewart Development

Louis Interdonato
Member

Region: wdc
Car #: 90
Year : 93
Posts: 1132
Status: Offline
Icon 1 posted  Profile for Louis Interdonato     Edit/Delete Post  Report this post to a Moderator

I thought that might be the problem....but you said that you checked the shocks. I had the same issue due to a sripped out shock nut.

--------------------
WDCR SM # 90 http://www.rpperformanceracing.com/

Dr.Dan Verified Driver Made Donation to Website
V8, nice! And good for you too!

Region: san francisco region
Car #: 39
Year : 90
Posts: 1800
Status: Offline
Icon 1 posted  Profile for Dr.Dan     Edit/Delete Post  Report this post to a Moderator

drill and safety wire??

--------------------
Daniel Mairani DDS...still here, just faster.
http://www.DanielMairanidds.com

bpigpen
Member

Region: sfr
Car #: 20
Year : 95
Posts: 104
Status: Offline
Icon 1 posted  Profile for bpigpen     Edit/Delete Post  Report this post to a Moderator

Why is it a dentist wants to drill everything?

dtfastbear Verified Driver Made Donation to Website
faster than the average bear...

Region: SFR / NorCal
Car #: 72
Year : 93
Posts: 1276
Status: Offline
Icon 1 posted  Profile for dtfastbear   Author's Homepage     Edit/Delete Post  Report this post to a Moderator

That's why I never take Dr. Dan up on his generous offers to sleep in his trailer at the track... [Eek!] [nope]

--------------------
NASA Nor Cal SM series Director
www.molaps.com

Winner - Ford Racing Mustang Challenge Driver Shootout

Evil Genius Racing / Race Engineering / Stewart Development

Ken Wilkinson Verified Driver
Member

Car #: 228
Year : 1999
Posts: 43
Status: Offline
Icon 1 posted  Profile for Ken Wilkinson     Edit/Delete Post  Report this post to a Moderator

Is there a known torque setting for the Fat Cat nuts?

--------------------
Ken

d mathias Verified Driver Made Donation to Website
Member

Region: OVR
Car #: 88
Year : 1991
Posts: 2401
Status: Offline
Icon 1 posted  Profile for d mathias     Edit/Delete Post  Report this post to a Moderator

Ken, see;
http://www.fatcatmotorsports.com/FCM_MT_KIT_SM_Instructions_2_14_10.pdf

   

   Close Topic   Feature Topic   Move Topic   Delete Topic next oldest topic   next newest topic
 - Printer-friendly view of this topic | Subscribe To Topic
Hop To: