Foil heat shield: how tough is it?

adunham · 08-17-2008, 09:59 AM

I just finished my 4" exhaust install, which required some additional fitting because I used a 51" Donaldson. After everything was welded up, I went to tighten the downpipe and noticed it was just barely kissing the heat shield foil on the firewall - not really depressing it, just kissing it. So, is the foil/fiberglass (or whatever fabric is behind the foil) pretty tough stuff or does it need a decent airgap to prevent hotspotting and burn-through? Anyone else have a downpipe that touches the foil and are you problem free?

Thanks,

-Aaron

__________________
02 QC 4x4 SB Auto;Firestik;CB;Sport King A/T's (285/75/16's);Inyati; Westach Boost/EGT,FP,TT;AFS Walbro 392;Vulcan hose;Amsoil 4510;4" MBRP, 51" Donaldson;Kool-Vue's
ADUNHAMWORKSHOP.COM

***dom42*** · 08-17-2008, 10:02 AM

personally id wrap it up with some Heat wrap that you can find at any hotrod shop. .........ive seen that heat shield burn before wont really catch on fire , just gets burn.....good luck.

__________________
2006 2500 QCLB 4x4 auto-5" SilverLine TBE - cfm plus- s&b CAI system- 6 inch superlift- kore components- 325/60/20 bfg AT's- 20" motometal- fs2500 on engine & tranny- maghytec all around- 4.10gears- edge juiced/w attitude- truckcoverusa roll out cover- rhino linings- firestone bags- Nfab 6step- Thuren trackbar
k7gsxr1000- full race bike- ohlins all around-brembo masters-full ti arata exh-pretty much everything

08-17-2008, 09:59 AM	#1 (permalink)
adunham Cummins Enthusiast Join Date: Aug 2006 Location: Arizona Posts: 290 adunham's Truck Pics	Foil heat shield: how tough is it? I just finished my 4" exhaust install, which required some additional fitting because I used a 51" Donaldson. After everything was welded up, I went to tighten the downpipe and noticed it was just barely kissing the heat shield foil on the firewall - not really depressing it, just kissing it. So, is the foil/fiberglass (or whatever fabric is behind the foil) pretty tough stuff or does it need a decent airgap to prevent hotspotting and burn-through? Anyone else have a downpipe that touches the foil and are you problem free? Thanks, -Aaron __________________ 02 QC 4x4 SB Auto;Firestik;CB;Sport King A/T's (285/75/16's);Inyati; Westach Boost/EGT,FP,TT;AFS Walbro 392;Vulcan hose;Amsoil 4510;4" MBRP, 51" Donaldson;Kool-Vue's ADUNHAMWORKSHOP.COM

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08-17-2008, 10:02 AM	#2 (permalink)
*dom42* Cummins Diesel ADdict Join Date: Feb 2007 Location: Los Angeles Posts: 1,194 dom42's Truck Pics	personally id wrap it up with some Heat wrap that you can find at any hotrod shop. .........ive seen that heat shield burn before wont really catch on fire , just gets burn.....good luck. __________________ 2006 2500 QCLB 4x4 auto-5" SilverLine TBE - cfm plus- s&b CAI system- 6 inch superlift- kore components- 325/60/20 bfg AT's- 20" motometal- fs2500 on engine & tranny- maghytec all around- 4.10gears- edge juiced/w attitude- truckcoverusa roll out cover- rhino linings- firestone bags- Nfab 6step- Thuren trackbar k7gsxr1000- full race bike- ohlins all around-brembo masters-full ti arata exh-pretty much everything