Need help -- shorty exhaust related
04-14-2004, 08:59 AM
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Need help -- shorty exhaust related I haven't made up my mind yet but wanted some opinions from everyone here. Here's the goal. I want to reach close to 375 tops for rwhp, making a low 12 second street car. I'm currently about 315 
Here is my current list of mods:
Ram Air mod
Airbox lift -- 1/4"
Removed EGR from LS1 Intake manifold
Throttle body bump stop mod
SLP Air Lid W/K & N filter
SLP 85mm MAF
Hooker Cat-back exhaust
Exhaust cutout
TCI Super Street fighter 3500 stall
3.73 gears
B & M tranny cooler
ASP Underdrive pulley
BMR Lower Control Arms with relocation brackets
LS1 Edit + Dyno tuned by Delk Performance
I'm looking at later, Edelbrock Shorties, aftermarket Y-pipe with hi-flow cats (thinking that exhaust setup where I won't ever have any emission problems although for the time being I can actually do the same with Lond Tubes, but $$ plays a factor though).
LS6 intake and later, maybe TR224/224 .561/.561 LSA 114 cam and TEA Stage II heads.
What is everyones take, will this work? And mainly as this is the part that I am working on right now, the exhaust. Should I go with the shorties? And what kind of gains could I possible see on it with the stock engine setup now? Maybe at least 10 to 15 on the wheels??
Just curious, thanks!!
Here is my current list of mods:
Ram Air mod
Airbox lift -- 1/4"
Removed EGR from LS1 Intake manifold
Throttle body bump stop mod
SLP Air Lid W/K & N filter
SLP 85mm MAF
Hooker Cat-back exhaust
Exhaust cutout
TCI Super Street fighter 3500 stall
3.73 gears
B & M tranny cooler
ASP Underdrive pulley
BMR Lower Control Arms with relocation brackets
LS1 Edit + Dyno tuned by Delk Performance
I'm looking at later, Edelbrock Shorties, aftermarket Y-pipe with hi-flow cats (thinking that exhaust setup where I won't ever have any emission problems although for the time being I can actually do the same with Lond Tubes, but $$ plays a factor though).
LS6 intake and later, maybe TR224/224 .561/.561 LSA 114 cam and TEA Stage II heads.
What is everyones take, will this work? And mainly as this is the part that I am working on right now, the exhaust. Should I go with the shorties? And what kind of gains could I possible see on it with the stock engine setup now? Maybe at least 10 to 15 on the wheels??
Just curious, thanks!!
04-14-2004, 10:32 AM
#2
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Join Date: Dec 2003
Location: Huntington, WV
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Check out Super Chevy Magazine's article on LS1 does and don'ts. They say not to even bother with shorties. HP is only 5 and maybe 10 if you are really lucky. Have you considered Flowtech Longtubes? They are $370.00 I think on LS1 Speed Inc. and you could fabricate the flowtech y-pipe with some cats. About a month ago someone posted a 29 rwhp gain from flowtech longtubes and a custom catted y-pipe. You would probably see even more gains because of current mods and future setup with a cam. Check that magazine out though. I'm currently running the flowtech longtubes and ORY and am very pleased.