Muffler delete pipe = extreme temps at tailpipe??

[serialk11r]

Originally Posted by bimmerboy

wow seems like that high compression really affects EGTs... I would maybe use a larger diameter pipe and angle it down so the exhaust is flowing away from your bumper..

Higher compression should reduce EGT though...higher EGT means more heat energy going to waste.

[86design]

looks good...not bad at all

[SkullWorks]

some people are trying to think too hard in here lol


I have the berk muffler delete, I installed it while the car was hot, the stock exhaust at the muffler flange was hot enough to be painful, and I work with hot metal and have a decently high threshold for heat/pain.

the Berk piece is 304ss and turns the familiar brown/purple rather quickly (170miles) with spirited driving, not dissimilar from the stock piping at the muffler that was just starting to lose it's paint in flakes after 3200 miles (hard ones)

there is quite a large amount of heat in the exhaust of this car, far more than I have seen in previous vehicles, but it also isn't something I make a point of datalogging...

under car airflow, is it worse without the muffler? most likely yes,

is it trapping heat? decidedly not, but there is definitely less surface area for it to dissipate through, and less mass for a heatsink

limiting the radiating heat with a tip with some air flow around it isn't a bad idea.

keep in-mind that the stock muffler TIP is about the same diameter, not the piping, and you have all the exhaust heat on one side now... If it is a large concern just go baller status and put gold reflective foil around the cut out in the bumper to reflect the heat...or go getto and wrap just the tip in header wrap

[MarkRacerX]

How about a turn down pipe, so aims down vs straight out should help w/ heat.

Thanks for sharing !

[NYC BRZ]

Might sound like a dumb idea but how about welding a few small fins on the underside of the pipe to act as a heat sink?

[serialk11r]

Originally Posted by twincamRob

To those thinking turn downs, heat sinks, etc.... I know those might help or 'fix' the issue but I'm just baffled that this is an issue at all because it never has been before on other cars.

Aerodynamics between cars is pretty different, and this car used the muffler to crudely guide airflow somewhat, which most cars don't (they just have a muffler sticking out under the car).

[Lee358]

so has this done any damage to your bumper?

[simpleisbest]

Since thread was created I have made it a point to check is there is any high heat being transferred to the bumper outlet from my Nameless exhaust delete pipe (painted black w/bbq paint). Whether 15min, 30min, or 1hr drive, I haven't noticed any real heat being transferred. Immediately after parking the car, I've placed my hand on the bumper out let just above the exhaust tip and it's always just barely warm. It maybe the pipe placement or you just need a bit longer pipe.

Best of luck to you!

[OrbitalEllipses]

Originally Posted by Reason

To apply Occums Razor on both points

The steel you're using might be radiating more heat than the stock pieces (and as mentioned, would be less of a heat sink with far less surface area, too)

For the paint;t your can of paint has either gone bad, or reacted in a way it normally wouldn't.


Thats just my theory.

If you're going to try to sound smart, get the name right. Occam's Razor.

[philstar]

well this happened running no muffler at all and no pipe at all. The heat these cars produce is wild! The rear bumper just melted!

[ame="http://www.youtube.com/watch?v=B7IgBEyxjKc&list=UUSkcckSwAhBcAzrUty-4L-Q&index=4&feature=plcp"]Muffler Delete Produces Shocking Results - YouTube[/ame]

[ame="http://www.youtube.com/watch?v=haeDkmpapzc&list=UUSkcckSwAhBcAzrUty-4L-Q&index=3&feature=plcp"]Muffler Delete Produces Shocking Results: Part 2 - YouTube[/ame]

[Reason]

Originally Posted by OrbitalEllipses

If you're going to try to sound smart, get the name right. Occam's Razor.

Hey, make some allowances for lazy typing
Wasn't trying to sound smart, was just trying to reason out why its happening. If I was smart, I would know why it was happening, and instead of contemplating it on a forum, would probably be making money from said knowledge.

[FT-86GOD]

Sh*t... Melted bumper.... Thats a bit much.... Must get hot back there... Wonder if running deleted cat and resonator will increase temps?

[CSG David]

The heat coming from the exhaust is for real. We've seen pictures of people melting their bumpers off when the muffler was deleted completely with no pipe to route the exhaust gasses away from the bumper. The muffler delete pipe is a great item to reduce weight, but for heavy race conditions, the delete is not fully supported so the pipe actually wobbles laterally. During CSG's testing at Streets of Willow, the exhaust melted the inside edge of the bumper very slightly. You can't see this visually so you have to use your fingers to feel the backside of the bumper. Will this present an issue? Probably not, but if your car bounces around and causes the pipe to dance around violently, you can potentially scar your perfect bumper very slightly (no visual problem). Perhaps the heat could have to do with the car running very lean due to Direct Injection?

[SkullWorks]

I have about 800 miles on my Berk Delete pipe and I have seen no deformation or discoloration due to heat, but the 304SS tip is fully deep purple now.

Just an update.

The pipe location seems to change based on the heat in the exhaust so it may be a matter of adjusting (berk has adjustable locator on the exhaust hanger) the position of the pipe in the bumper cutout while the exhaust is hot (i installed mine while exhaust was already hot, yes it burned)