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Author Topic: Heat wrap on exhaust
omg
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Region: washington
Year : 1990 sm 1990 ssm 2007 MX5 Cup
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I cked the DC region SSM rules for the year, and could not find the answer. Is it permissable to wrap the exhaust with a heat resistance material to help keep the heat down in the car? Thanks

wheel Verified Driver Made Donation to Website
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It is not legal in SM, don't know about regional classes.

George Munson Verified Driver
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I'm guessing with SSM since you guys use a stock exhaust it is not allowed.

d mathias Verified Driver Made Donation to Website
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If it doesn't say you can...

pat slattery Verified Driver Made Donation to Website
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NO

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keeping the faith for the 1.6

Arrow Karts

Gibscreen Verified Driver Series Champ
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quote:
Originally posted by d mathias:
If it doesn't say you can...

Or even better: if it says you can't, you can't.

SCCA:

"m. Exhaust system
1. The exhaust manifold must be Mazda OEM, without any material added or removed. No coatings are permitted on the exterior or interior of the manifold. Heat wraps may not be used."

If you'll recall, the 2009 SCCA Runoffs champion had a heat wrap on his exhaust. It was deemed legal since the total diameter of the exhaust pipe with the heat wrap was not bigger than the 2.25" the rules allow.

NASA doesn't have the heat wrap rule though.

"12.6 Exhaust System
The stock down pipe must be used. However any single exhaust pipe may be used, providing that it has a maximum outside diameter of 2.25 inches (+ 0.0625 tolerance)."

So for NASA you would then indeed need to fall back on the rule of "if it doesn't say you can, then you can't." Although I think there is still an argument to be made that if the pipe with heat wrap does not exceed 2.25 inches plus the .0625 inch tolerance, you're good.

Thread hijack: I love "tolerances". Why not just increase the maximum diameter to 2.3125"? Reminds me of the NASCAR pitlane speed limit rule where they have the speed limit of say, 55mph, but they then have a "cushion" of 5 mph. Drives me nuts. To "limit" something is defined as preventing it from becoming greater than a particular amount or degree. So by definition, if there is a cushion, it's not a limit. 55mph is then just a guideline, a preference, a suggestion, a request, whatever. But it's sure as hell not a limit!!!

--------------------
Rob Gibson
RJ Racing
2010 NASA Nationals TTE Champion
2008/2009 WERC Champion
2007 NASA SoCal SM Champion
rjracing.net
Weekend-Racer.com

omg
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Region: washington
Year : 1990 sm 1990 ssm 2007 MX5 Cup
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Sorry for newbe ?. I had my 1990 on the lift today, should this car have a heat shield? The previous owner had the pipe wrappped. He raced with the car in SSM class last year, I quess he was not legal, from what I am reading here.

Thanks again for all your help.

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

Region: san francisco region
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the heat shield under the car can be removed, I believe. I left some of mine on to keep my feet cooler. You should have the top one and he probably did to hide the wrap. No one I know uses it.

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

omg
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thanks for your help

SM Police
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Region: Chicago
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Year : 1991
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Let's be clear on this one. They say the "exhaust manifold" can't have wrap. That would be the 4 into 1 collector (the header) up at the engine end. After that isn't the exhaust free? If it's free doesn't that mean you can do what ever you want as long as it exits after the rear axle. Last year I had a springfield dyno exhaust with the muffler can wrapped (to control heat in the cabin) and a section of the tail pipe near the diff wrapped (to control heat on the diff). The header was not wrapped...because that is illegal.

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Speed Dog Racing, Inc.

Kyle Freiheit
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Car #: #78 sorry Terrell
Year : 1992
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2010 GCR explicity forbids, thermal coatings and heat wrap on the exhaust system now.

Don't know if I agree with it but thats the rule.

Kyle

SM Police
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Region: Chicago
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DISCLAIMER!

I should say that my reference point is last year. I have not brought myself up to speed on the 2010 rules.

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Speed Dog Racing, Inc.

Chris Windsor Verified Driver Made Donation to Website Series Champ
windsorcustoms.com

Region: WDCR,
Car #: 38
Year : 1991
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Nope no wrap for SSM, WDC or Northeast

--------------------
2011 Season schedule coming soon
Support, sales, repair or rental
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wheel Verified Driver Made Donation to Website
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2010 GCR
"m.4.f. No portion of the exhaust may be wrapped with any type of insulating tape, nor shall any portion of the exhaust, internal or external, be coated with any thermal coatings."

JimEli Verified Driver Made Donation to Website
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What's the difference between high temperature exhaust paint and thermal coating?

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UPR.com
Team LemonLappers

Chris Windsor Verified Driver Made Donation to Website Series Champ
windsorcustoms.com

Region: WDCR,
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High temp paint is what you cover up the thermal coating with

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2011 Season schedule coming soon
Support, sales, repair or rental
windsorcustoms.com

tony senese Verified Driver
Phew, that was close!

Car #: 99
Year : 1994
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Also, I would check with your local scrutineer.... at my first SCCA race after racing for several years with NASA, they almost DQ'd me for "illegal coating on the exhaust....." I had painted the heat shield that bolts onto the header with engine paint....

common sense eventually won the day, but not without a few tense moments on my part. Other DQ's had put me into 3rd place.... and I thought I would be next!

Needless to say, before the next race I painted that part silver to match the factory coating!

--------------------
Tony Senese
SM#99
2008 NASA-NE SM Champion
NASA-NE SM Director
2008 PRO-IT SM 3rd place
http://www.nosenseyet.com/coppermine

wheel Verified Driver Made Donation to Website
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I really don't think it is wise to put anything on your exhaust system, the way the rule is written. Why tempt fate.....or the tech shed?

   

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