RPM Heads only change picked up 38 to the wheels.
02-26-2004, 09:15 AM
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Staging Lane
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Join Date: Dec 2002
Location: Dallas Tx
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RPM Heads only change picked up 38 to the wheels. I had RPM CNC port some 98 LS1 heads and mill them alittle. Man am I impressed. Car Idles and runs like stock. Very little shaking. I have to thank CHRIS ROBERSON for the tuning, by far the best LS1 tuner.
The only change is the heads, I picked up peak 38 rwhp and down low over 60. Where I did pick up alot also was torque, Uncorrected was 417.5 with corrected 405.3 up from 363 rwtq corrected.
Before 333 rwhp through Cats - SAE
After 371 rwhp through Cats - SAE My uncorrected were over 380.
Chris moved the air fuel to around 12.7 to 1 and it lost power so I am running a very safe 12.2 to air fuel and 24 to 25 degress of timing.
Chris told me if I lost the cats I would pickup a additional 10 to 15 rwhp but I am undecided on weather I like the smell of unburnt gas that much.
The vette pulls up top like crazy, once again thanks RPM.
Cant wait to get to the track!
The only change is the heads, I picked up peak 38 rwhp and down low over 60. Where I did pick up alot also was torque, Uncorrected was 417.5 with corrected 405.3 up from 363 rwtq corrected.
Before 333 rwhp through Cats - SAE
After 371 rwhp through Cats - SAE My uncorrected were over 380.
Chris moved the air fuel to around 12.7 to 1 and it lost power so I am running a very safe 12.2 to air fuel and 24 to 25 degress of timing.
Chris told me if I lost the cats I would pickup a additional 10 to 15 rwhp but I am undecided on weather I like the smell of unburnt gas that much.
The vette pulls up top like crazy, once again thanks RPM.
Cant wait to get to the track!
Also are you sure about the A/F's your posting? 