Exhaust limits with Forced induction?
Exhaust limits with Forced induction? My car is a 01 SS M6 , i am running 10 PSI from a d1-sc procharger system, with methanol injection.
I am rebuilding my motor with forged parts and 9.25 to 1 compression, so i can push 15-20 PSI of boost ,
I will be running the Thunder racing Blower cam, with 214-230 601/580 lift on a 117 LSA
with Absolute Speed street blower heads , flowing 300 cfm on the intake with ferrea 2.00 and 1.57 valves .
OK i have been hearing a lot about what will limit my HP and power level,
# 1 was the exhaust side of my heads , thats why i had extra work done to them (1.57 ferrea valves with a special radius cut to the seat and blend work) to pick up more CFM flow out of the exhaust side.
#2 was my exhaust system , i am running Jet hot coated FLP 1 3/4" Long tube headers, with uncatted Y pipe and my stock 3" main pipe (over axle Pipe)
into the stock dual-dual out let SLP exhaust.
Since i reworked the heads and been told they will be good now for the power I want, the heads should be good, and not a problem anymore,
OK the exhaust on the other side , sounds great and looks stock i realy wanted to keep it,
My Y-pipe is only 2.5 " i was thinking on having a 3" Y made up ,
and maybe a 3.5" - 4" main pipe made up , but not sure if i need it?
Or at least doing the little by pass trick some people used to do , where they had a 1" -2" small elbow pipe welded in from the main pipe direct to the tail pipe, so if the muffler was a restriction it would not back up the exhaust and flow out the tail pipe , kinda like a by pass valve.
well let me know what you think
thank you for your help.
I am rebuilding my motor with forged parts and 9.25 to 1 compression, so i can push 15-20 PSI of boost ,
I will be running the Thunder racing Blower cam, with 214-230 601/580 lift on a 117 LSA
with Absolute Speed street blower heads , flowing 300 cfm on the intake with ferrea 2.00 and 1.57 valves .
OK i have been hearing a lot about what will limit my HP and power level,
# 1 was the exhaust side of my heads , thats why i had extra work done to them (1.57 ferrea valves with a special radius cut to the seat and blend work) to pick up more CFM flow out of the exhaust side.
#2 was my exhaust system , i am running Jet hot coated FLP 1 3/4" Long tube headers, with uncatted Y pipe and my stock 3" main pipe (over axle Pipe)
into the stock dual-dual out let SLP exhaust.
Since i reworked the heads and been told they will be good now for the power I want, the heads should be good, and not a problem anymore,
OK the exhaust on the other side , sounds great and looks stock i realy wanted to keep it,
My Y-pipe is only 2.5 " i was thinking on having a 3" Y made up ,
and maybe a 3.5" - 4" main pipe made up , but not sure if i need it?
Or at least doing the little by pass trick some people used to do , where they had a 1" -2" small elbow pipe welded in from the main pipe direct to the tail pipe, so if the muffler was a restriction it would not back up the exhaust and flow out the tail pipe , kinda like a by pass valve.
well let me know what you think
thank you for your help.
look at mufflex's web site. go with the 4in. with the spinstech muffler they sound great. i use to have on my car less rasppy sound with all that extra hp u'll have. or go dual under the car or a custom over the axle
We pushing 16 psi of boost and making 740 rwhp with this 346/D-1SC combination through shorty headers/stock cats/Magnaflow exhaust on this C5. Bob
http://www.exoticperformanceplus.com...Car.php?car=40
http://www.exoticperformanceplus.com...Car.php?car=40
FormerVendor
Joined: Mar 2006
Posts: 1,540
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From: Hell AFB
Thankfully enough the owners local emissions does not require being put on the rollers, the cats are on there way out, being one of the few cars with cats around this HP level, we had noted there was cat material covering the backside of the dyno and the exhaust.
Launching!
Joined: Apr 2007
Posts: 279
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From: lynchburg va
[QUOTE=jason02Z;8228375]look at mufflex's web site. go with the 4in./QUOTE]
this is what I have but with a magnaflow muffler, with one 4 inch outlet....fits great and uses the stock hanger locations.....
this is what I have but with a magnaflow muffler, with one 4 inch outlet....fits great and uses the stock hanger locations.....
Why not do an electric cutout? I dont particularly like the way it sounds but it would work good for what you are wanting. Quiet when you want it to be and effective when you need it to be.
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FormerVendor
Joined: Mar 2006
Posts: 1,540
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From: Hell AFB
Depending on the amount of backpressure, the tune will be different if he does not open the cutout when he makes power.
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Verdad Gallardo We have seen a lot of horsepower with good long tube headers, three inch Y Pipes and either the Hooker or the Magnaflow exhaust systems. Either of these systems will get you a lot of horsepower. Bob
