Cam suggestion - would like to bypass EGR
11-26-2005, 10:06 PM
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Car: 91 B4C, 17 C7 GS, 16 Denali DMax
Engine: LS3, LS3, LML
Axle/Gears: 3.23, 3.42, 3.23
Cam suggestion - would like to bypass EGR
The motor in question is an L98 TPI motor.
I know there are some cams that have enough overlap that will allow me to bypass my EGR valve. This is a concern as I do have to pass a smog test every other year.
What are people running for cams that will provide this overlap? I am interested to hear what people are running.
I know there are some cams that have enough overlap that will allow me to bypass my EGR valve. This is a concern as I do have to pass a smog test every other year.
What are people running for cams that will provide this overlap? I am interested to hear what people are running.
11-27-2005, 10:38 AM
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Car: 88 Camaro SC
Engine: SFI'd 350
Transmission: TKO 500
Axle/Gears: 9-bolt w/ 3.23's
I wouldnt use the overlap to try to pass emissions. Get the right cam for your combo, tune the motor, and it should do ok.
Edit: You have a 91 with speed density, that will definatly need to be tuned.
Edit: You have a 91 with speed density, that will definatly need to be tuned.
11-27-2005, 05:09 PM
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Car: 2005 BMW 545i
Engine: 4.4L N62B44
Transmission: 6spd auto
Axle/Gears: Rotating
if your running a good amount of overlap isn't that going to send raw fuel into the exhuast which should screw your emissions up
11-28-2005, 01:34 AM
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Car: Z28
Engine: Sb2.2 406
Transmission: Jerico 4 speed
Axle/Gears: Ford 9" 3.60
Yes, overlap can dump raw fuel down the exhaust. I would worry about this and the other 'real' effects of a larger cam, rather than using a bigger one because of its "EGR effect."
I agree with 24x7. Get the right cam to begin with and tune the crapola out of it.
I agree with 24x7. Get the right cam to begin with and tune the crapola out of it.
11-28-2005, 01:58 AM
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Car: 1983 G20 Chevy
Engine: 305 TPI
Transmission: 4L60
Axle/Gears: 14 bolt with 3.07 gears
I would go with a Production LT4 cam, but that just me. My dad has one in a Vortec 365 (offset ground crank, off the shelf pistons) with a Westers HOT tune and it flat gets it.
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