Str8 Eight
01-20-2005, 09:24 PM
Does anyone know how much EGT's are lowered by only replacing the stock muffler with a straight pipe.
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GMC2500HD 01-20-2005, 10:58 PM You will lower you EGT's about 100 degrees, maybe a little more. I have a straight pipe on mine and noticed lower EGT's once it was installed. Str8 Eight 01-21-2005, 09:41 PM You will lower you EGT's about 100 degrees, maybe a little more. I have a straight pipe on mine and noticed lower EGT's once it was installed. Did you test the egts before you went with the 4" exhaust, because I am only using the stock 3.5" pipes right now. dpower 01-21-2005, 11:12 PM lly or lb7? GMC2500HD 01-21-2005, 11:16 PM Mine is an LB7 and yes I tested the temps prior to install.. They were lower. Str8 Eight 01-21-2005, 11:43 PM lly or lb7?Lb7 2loud 01-23-2005, 02:14 AM I removed the muffler on my Lb7. I agree, the EGT went down by around 100 degrees. The turbo spools at much lower RPM. Noise is not bad on the inside, but outside it's loud. 1KTRQ 01-23-2005, 02:23 AM Did you remove your cat also? 03LB-7dmax 04-09-2005, 11:58 PM NO (cats) on the lb7, (Unless its a cali truck). Only on the lly RUNNINHORN 04-10-2005, 12:08 AM NO (cats) on the lb7, (Unless its a cali truck). Only on the lly if i go hack off my CAT on my 05 Duramax, will it throw an error code? rjdake 04-10-2005, 08:19 PM if i go hack off my CAT on my 05 Duramax, will it throw an error code?There's actually an interceptor that can take care of that ... I think it is called "finger stick." sduramax 04-17-2005, 02:09 AM yea straight pipe lowers your egt but u loose back pressure wich afects your turbo psi & horse power on the dyno just get a "banks big head accuator" 4 about $250 bucks and adj it to about 30-32 psi on manifold side. I wouldnt trade my duramax for the world lly ex cab sumit white pushing 700 hp "cummin stroke this boyz" sticker in the back window. | ||