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Author Topic: Need to lose 16 pounds from '90 SM
Reggie Verified Driver
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Region: Delta
Car #: 77
Year : 1990
Posts: 74
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To reach 2285 lbs, I need to remove 16 lbs of stuff. I'm wondering if removing the driver's side vent window and removing the plastic inner fender materials would be advisable? I've removed everything else easy (parking brake, wiring, glovebox door, catalytic converter shield, etc).

Pat Newton Verified Driver Made Donation to Website
Enduro addict

Region: Northwest, Oregon
Car #: 79
Year : 90
Posts: 3336
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Don't take this the wrong way, but how's your "personal ballast?" Only a month of dedicated effort can remove 10-15 lbs, plus you'll be in better shape to drive the car. [Smile]

Fender liners are easy but only save you a pound or two as I recall (from years ago).

--------------------
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

oem steve
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Region: South East
Car #: #92
Year : 91
Posts: 189
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how much do your wheels weigh? 4lbs over per wheel could be your difference.

--------------------
email: standrewsexpress@bellsouth.net
visit us at http://www.standrewsexpress.com

Under powered and under driven

Reggie Verified Driver
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Region: Delta
Car #: 77
Year : 1990
Posts: 74
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Wheels are 13 lbs, personal ballast is 175 lbs. I wonder how much the vent frame and vent window weigh?
How about the winshield washer bottle and electric motor, can I remove these items?

GROOTS
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Region: NY
Car #: 48
Year : 90
Posts: 74
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Have you removed the complete AC system. condenser unit under the dash ?? What about the passenger door. Nascar bars Gutted ?

--------------------
JEFF GRUTER
SM #48
EXCELL MOTORSPORTS
PARAMOUNT TOOL & EQUIPTMENT http://www.ptetool.com/

Mitch Taylor
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Region: FLA
Car #: 97
Year : 1990
Posts: 76
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Condener unit is often over looked. Are both doors gutted for nascar bars, that's how I go down to weight.

What type of muffler are u using, weight. hom much gas do you have in the tanks? If all else fails, scrap the undercoating.

Check t osee if any body panels are repaired and have alot of bondo/filler.

cam Verified Driver
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Region: southwest
Car #: 14
Year : 90
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A '90 with personal weight of 175 should easly get down to 2285. I still have my passanger door and Petty bar and still need to finish with around 1/4 tank of fuel. If you have an extra heavy roll cage, then that is weight well spent. I would sugest looking at other lighter cars in your area to see what you have overlooked.

--------------------
"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

Chris Haldeman
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Region: texas
Car #: 71,72
Year : 1990,1999
Posts: 166
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that car is mega heavy you must be missing alot.i am 185 and i have 45# of lead plus a cool suit to make 2275 in my 90.the only way we can help you is if you post a series of pics inside and out under the car,in trunk,and under dash other wise this is a waste of time.

W. Bonsell
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Region: NWR/Oregon
Car #: #26
Year : 1991
Posts: 334
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Agree that something must be amiss. I weighed 220 this spring and came in anywhere from 2296-2310, depending on scales, in a 91 with unaltered driver and passenger doors...

Bill

--------------------
William Bonsell
SCCA/ICSCC #26
SM/ITA

oem steve
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Region: South East
Car #: #92
Year : 91
Posts: 189
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I agree with these other post that you are missing something or I should say you are leaving something big in. [Smile] I weigh between 205-210 dressed out and came across the scales at VIR at 2290. I have a lot of extra gusseting on my cage and all the undercoating plus aluminum interior panels.

--------------------
email: standrewsexpress@bellsouth.net
visit us at http://www.standrewsexpress.com

Under powered and under driven

Reggie Verified Driver
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Region: Delta
Car #: 77
Year : 1990
Posts: 74
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I have a heavy roll cage with nascar doors, but the doors are gutted and the a/c condensor are gone. I bought the car used after a professional rebuild of the roll cage and other items. I presume that no one considers the vent frame, the washer bottle and pump and inner plastic fenders are worth removing? I weighed the car with one gallon of fuel and with me in it with helmet, etc. Thanks, everyone.

Keith in WA Verified Driver Made Donation to Website
Pack Fodder

Region: NWR / Oregon
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Year : 95
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Whiners. Prep a 1.8 and your problem will be... Ok, how and where to add a bunch of weight? Seems like I'm always one good crap away from coming in light.

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

Chris Haldeman
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Region: texas
Car #: 71,72
Year : 1990,1999
Posts: 166
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i have a heavy .120 wall cage also.yes remove all the plastic crap,vent window and frame.you will lose some weight.not sure on the washer fluid bottle.mine is in and half full

Teamfour Verified Driver Made Donation to Website
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Region: WDCR
Car #: 04
Year : 1993
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quote:
Originally posted by Reggie:
I presume that no one considers the washer bottle and pump worth removing?

Is this removal legal?

Also Reggie, 1.6s minimum weight is now 2275. So you need to lose 26 lbs. [Wink]

--------------------
Lee Tilton
1993 Meowta #04
Brimtek Motorsports/ Team Four Racing
Team Four Racing

Willie the Tard Verified Driver
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Region: NASA Texas
Car #: 8
Year : 92
Posts: 697
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One word -- flywheel [Smile]

--------------------
William Keeling a.k.a. Willie the Tard

Vick Verified Driver
Do they sell spec training wheels?

Region: NYR
Car #: 12
Year : 1991
Posts: 620
Status: Offline
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Hood pins instead of latch?

What are your tow hooks made out of?

All the airbag stuff out?

Ecu cover plate?

What type of seat are you running? Alum is lighter than composite, but that's a safety decision for you.

Is your hood aftermarket steel or oem alum?

Sound deadening material in the trunk?

Are you running spacers?
I'm also over in my 1.6l because of my .120 cage. I think it will be possible to get there though.

--------------------
http://www.volko.com

Reggie Verified Driver
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Region: Delta
Car #: 77
Year : 1990
Posts: 74
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Thanks, guys. Vick, aluminum seat and hood, and all the stuff you named are gone. I guess it's the roll cage that puts me over by 26 lbs. I'll work on the window vents and the plastic inner fenders. I don't see any prohibition with removing the windshield bottle and washer motor. what say you guys? Legal or not?

D.B. Cutler Verified Driver Made Donation to Website
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Region: Detroit
Car #: 5
Year : 1991
Posts: 1029
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It's not legal to remove the washer bottle but you can empty it completely. I wrote a letter to the CRB and BOD requesting that we can remove this part. However, I'm not confident that it will be allowed.

You can use mountain climbing loops for tow hooks. I bought mine at REI. The OEM ones are very heavy.

Did you remove the front and rear dust shields on the brakes?

Also, the air bag sensors are pretty heavy.

Dave Metz
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Region: OVR
Car #: TBD
Year : 1999
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You have power steering? Buncha weight there.

Reggie Verified Driver
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Region: Delta
Car #: 77
Year : 1990
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No p/s.

Reggie Verified Driver
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Year : 1990
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D.B. did you use the rappel rings @ $4.50 each? If not, what rings did you use?

D.B. Cutler Verified Driver Made Donation to Website
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They're not metal rings, they are the 12" long nylon loops in the mountain climbing area of the store. They can hold a few tons.

I've been using them for years and never had a problem through tech. Plus they weight only a few ounces rather than a few pounds.

Reggie Verified Driver
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Region: Delta
Car #: 77
Year : 1990
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Thanks, D.B. I have ordered a set to try.

Teamfour Verified Driver Made Donation to Website
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Region: WDCR
Car #: 04
Year : 1993
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D.B./Reggie, do you have a part number for the loops? I can't find them on the REI site. Thx.

--------------------
Lee Tilton
1993 Meowta #04
Brimtek Motorsports/ Team Four Racing
Team Four Racing

Teamfour Verified Driver Made Donation to Website
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Region: WDCR
Car #: 04
Year : 1993
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Never mind. They are called runners in climbing-speak.

--------------------
Lee Tilton
1993 Meowta #04
Brimtek Motorsports/ Team Four Racing
Team Four Racing

David Dewhurst
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I had 6,000 pound runners on my ITA car. [Big Grin]

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

David Dewhurst
CenDiv
Milwaukee Region
Spec Miata #14

Zauskycop Verified Driver
Member

Region: Chicago
Car #: 45
Year : 1991
Posts: 115
Status: Offline
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Do you use those front AND rear? I can see a significant savings at the rear of the car.

How exactly did you attach them? (sorry to ask for so much...)

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

SCCA_Racer
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Region: 33 SFR
Year : 1991
Posts: 167
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I went to REI's website and found:
Petzl Express it is 9.8" long and hold a force of 4,900 lbs and only $5.95!!!

BlueWater Titan it comes in 6-48" lengths and will handle 6,000 lbs of force and is $3.60-$11.60 depending on length.

I may have to check out adding these to my car.

--------------------
Joshua Fine
SCCA member 323214 since 2003
Novice Permit in 2010
Racing 2011

jwarren Verified Driver
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Region: NNJ
Car #: 51
Year : 1991
Posts: 161
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i have personal experience from a .120 cage and a .095 cage, both in 1991 miata's. Thats where all of the weight is. When i had the thicker cage, i couldn't even dream of getting down to the minimum weight but with my newer car and the miatacage kit, i weigh 250 and still need a little fuel to keep me above weight.


there's a sound deadening mat on the firewall which will be a PITA unless you have tons of time but it might be worth a couple pounds. Also hood latch/trunk latch, any airbag sensors, etc.

do you have an aluminum radiator? the factory steelie is heavy and no good anyways.

all of the small stuff will add up.

--------------------
Ridgespeed Racing

#51 J. Andrew Warren

http://www.ridgespeedracing.com

Chris Haldeman
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Region: texas
Car #: 71,72
Year : 1990,1999
Posts: 166
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lets just put some facts in here for everybody blaming the .120 wall cage. .095 wall weighs 1.426 lbs per foot .120 weighs 1.769 lbs per foot.average miata cage has about 60 feet of tubing adding up to a total weight difference of 20.58 lbs reggie's car is atleast 50lbs over weight compaired to mine there is more to his weight problems than the cage.

Teamfour Verified Driver Made Donation to Website
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Year : 1993
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I ordered two runners from this site today. Cheaper than rock climber stuff, plus it is 1" wide. 6500 lb. rated.

Wesspur Runners

--------------------
Lee Tilton
1993 Meowta #04
Brimtek Motorsports/ Team Four Racing
Team Four Racing

David Dewhurst
Veteran Member

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Acording to the MiataCage site there basic kit is 69 feet of tubing for their cage therefore the weight difference between .095 & .120 inch thick wall for 1.5 inch diameter tube is 23.669 pounds. [Wink]

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

David Dewhurst
CenDiv
Milwaukee Region
Spec Miata #14

Steven Holloway Verified Driver Made Donation to Website
Blue Eyes, Aquarius, hates being squeezed to the grass in SowDiv!

Region: Lonestar
Car #: 97
Year : 91
Posts: 740
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quote:
Originally posted by Teamfour:
I ordered two runners from this site today. Cheaper than rock climber stuff, plus it is 1" wide. 6500 lb. rated.

Wesspur Runners

Hmmmm, couple of those and some metric eye bolts would be even lighter...McMaster-Carr, here I come.

--------------------
If you can't fix it with a hammer, it's got electrical problems.

cam Verified Driver
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Region: southwest
Car #: 14
Year : 90
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quote:
Originally posted by Chris Haldeman:
lets just put some facts in here for everybody blaming the .120 wall cage. .095 wall weighs 1.426 lbs per foot .120 weighs 1.769 lbs per foot.average miata cage has about 60 feet of tubing adding up to a total weight difference of 20.58 lbs reggie's car is atleast 50lbs over weight compaired to mine there is more to his weight problems than the cage.

OK, you sucked me into this one.
According to this sight DOM Mild Steel Tube 1.5 X .120 the .120 weights 1.59 lbs / foot. The site agrees with the .095 weight of 1.426 / foot. Therefore the delta for 69 feet is 11.316 lbs.

--------------------
"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

Chris Haldeman
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Region: texas
Car #: 71,72
Year : 1990,1999
Posts: 166
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cam your numbers make what i said look even better thanks! i got my numbers from some other site i dont remember what it was but the point is the tubing thickness makes very little difference

MPR22
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Region: Southwest
Car #: 22
Year : 92'
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If your car is a 90-93 model and the scales you are using are accurate, then your car is a big fat pig that needs Jenny Craig. I'm about 240 with racing gear and my 1.6 weighs in at 2285 ish depending on the scales.

Something isn't adding up. My car weighs 81 lbs less than your car. I haven't even gone to some of the more grey areas of weight removal.

--------------------
Michael Ross

-Bob-
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+1

Teamfour Verified Driver Made Donation to Website
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I must be in the big fat pig club. My car is a '93 and I weigh in at 195. Total weight of car with me and gear is 2345.

--------------------
Lee Tilton
1993 Meowta #04
Brimtek Motorsports/ Team Four Racing
Team Four Racing

Randy Thieme
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Region: Oregon
Car #: 51
Year : 1993
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quote:
Originally posted by Teamfour:
I must be in the big fat pig club. My car is a '93 and I weigh in at 195. Total weight of car with me and gear is 2345.

Mine is a '93. I weigh 220 with gear and come in on the scales at around 2308 with 1 gal. fuel. When the minimum was 2285 I was able to come in just a few pounds over but that was with an open diff. So are the '93s heavier than the '90-'92s?

Mark de Regt Verified Driver Made Donation to Website
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Region: NWR/Oregon; ICSCC
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Year : 1991
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My car couldn't come in light, even if I ran out of gas.

I'm typically around 2300; I weigh about 180.

I have a fire system in the car, and a center net. My seat is aluminum.

Absolutely no obvious way to drop weight from the car (or the driver; I'm 6'2" and old).

David Dewhurst
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quote:
Originally posted by cam:
quote:
Originally posted by Chris Haldeman:
lets just put some facts in here for everybody blaming the .120 wall cage. .095 wall weighs 1.426 lbs per foot .120 weighs 1.769 lbs per foot.average miata cage has about 60 feet of tubing adding up to a total weight difference of 20.58 lbs reggie's car is atleast 50lbs over weight compaired to mine there is more to his weight problems than the cage.

OK, you sucked me into this one.
According to this sight DOM Mild Steel Tube 1.5 X .120 the .120 weights 1.59 lbs / foot. The site agrees with the .095 weight of 1.426 / foot. Therefore the delta for 69 feet is 11.316 lbs.

When one gets sucked into something one should be sure one is dealing with facts. The onlinemetals site is wrong. The 1.5 inch diameter A513 steel tube weight is the same weight as the required SCCA roll cage material. 1.5 diameter .095 wall is 1.426 pound per foot & the .120 wall is 1.769 pounds per foot. The delta for 69 feet is back to 23.669 pounds. [Wink]

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

David Dewhurst
CenDiv
Milwaukee Region
Spec Miata #14

Johnny D Verified Driver Made Donation to Website
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Car #: 88 SM
Year : 99
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Has the car been repaired with a ton or 16lbs of bondo? Check with a magnet.

Also I hear the aftermarket tops are heavier than the OEM.
J~

--------------------
Avatar Video http://www.youtube.com/watch?v=ww9cFE3lKcA

MPR22
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Car #: 22
Year : 92'
Posts: 296
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It appears an intervention is necessary. Your cars are heavy because you have more legal stuff to remove. Lets take off some weight for Reggie's heavy cage. 81-24 still leaves 57 lbs to go.

Things I have, Mitatacage with optional dash bar, Torsen, fire bottle, 92 with extra subframe crossbar, Team D 1.2 wheels, hood pins, no ECU cover, traqmate, camera mount, the heaviest driver suit ever invented(LICO Michellin Man), Ultrashield Pro Race with Halo, black matting in trunk still in, no firewall matting (way more than a couple of lbs), no e-brake hardware, no passenger door stuff, lexan vent window driver.

--------------------
Michael Ross

MPR22
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Car #: 22
Year : 92'
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Make sure your hood is aluminum. The aftermarket steel hoods are ridiculously heavy.

--------------------
Michael Ross

Chris Haldeman
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Year : 1990,1999
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This is why I asked for pictures.if it was my car I would start looking for creative ballast placement by previous owner

Dave Metz
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Region: OVR
Car #: TBD
Year : 1999
Posts: 17
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You catch all the insulation behind dash and under package tray cover? Did take off sound deadening on floorboards also, didn't you?

D.B. Cutler Verified Driver Made Donation to Website
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Region: Detroit
Car #: 5
Year : 1991
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Did you take off all of the exhaust heat shields from the bottom of the car?

Keith in WA Verified Driver Made Donation to Website
Pack Fodder

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There's still other stuff that's more a replacement than a removal if you're hyper concerned about getting all the way down to weight. A 1.8 diff is huge compared to a 1.6. A SD exhaust is amazingly light. A 2" radiator might be more than you need and holds lots of water. Many people run a little low on oil for reportedly improved engine performance. Shaved tires will weigh less. If you've gone agricultural, mud and rocks stuck in funny places weighs a lot. Apparently, not all tops came with headliners. You can use any shift knob. The stock one is a brick.

A friend who debated getting a '99 since he didn't think he could get to weight in his 1.6 had a more knowledgeable friend go over the car and they lightened it quite a bit.

I try to come in about 5# over for a little cushion. Sometimes scales vary a lot too. Set up exactly the same I've weighed 20 lbs differently on scales at track A vs. B.

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

MPR22
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Car #: 22
Year : 92'
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Sometimes scales vary a lot too. Set up exactly the same I've weighed 20 lbs differently on scales at track A vs. B.[/QB][/QUOTE]


[Wink] [thumbsup]

Ed Zachry

--------------------
Michael Ross

MazdaSteve Verified Driver
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Region: CCR
Car #: 14 SM
Year : 1990
Posts: 36
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Another fat pig...

1990, Aluminum hood, Torsen, no bondo, fire system, no A/C components, no airbag senders, gutted doors, no heat shields or insulation, Momo seat, Piper cage.

1 gallon gas, driver 215 lbs with safety gear (includes HANs), car scales at 2316.

--------------------
Seneca Motorsports
Sponsored by Race Engineering
"American by birth, CONSERVATIVE by the grace of GOD"!

 
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