H/C/I swap
- Thread starter yellowmustang
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Blood on Blood
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My apologies for the lack of details... I was going to run NMRA Factory Stock again this year; however, I wanted to drive the car to/from the track (1.5 hours each way) without having to refresh the short block twice in the same year. For those who follow, the class cars run extremely lightweight internals, while use a lose setup on the rings/bearings (both wear down quick).
My setup is a 331 with Eagle rods n crank and light weight Mahle pistons. Everything is balanced by Clayton Racing (FYI, there is more balancing to be found after the out of the box balance/blue print). Windage tray and main support were also installed. The non-ported Cobra heads are milled and have a 5 angle valve job (lightweight valvetrain -springs, valves, titanium retainers, 1.7 rockers, etc.). Cam motion made the custom cam (230's/550's). Cobra intake is stock. Both the heads and intake are from when the car was ran in NMRA Factory stock class. Car is using the stock power steering pump, but the A/C is removed.
77 Pro M mass air and 70 mm Edlebrock TB
30 lbs injectors, MSD ignition 6AL, Two Step, 255 lph Holley fuel pump, Aero Fuel pressure regulator.
Kooks LT headers, Kooks O/R X pipe, SLP Loudmouth
Tuning software: PMS Generation 4
The remainder is still the race setup from when the car ran the Factory Stock class (weight still removed).
Additional tricks were used, but those above are the big items. For those who don't follow NMRA, in the Factory stock class, some are using the same heads/intake combo as I but with less cubes and a .480 lift maximum on the cam specs. They are making very similar HP as I.
There is still more power to be found in the my combo as I am light at 350 rwhp / 376 rwtq (humid day). But the track is the true test as the dyno is simply a yard stick when tuning.
I agree, aftermarket heads/intake would signicantly increase power, but the maddening spend on the car has to stop somewhere.
My setup is a 331 with Eagle rods n crank and light weight Mahle pistons. Everything is balanced by Clayton Racing (FYI, there is more balancing to be found after the out of the box balance/blue print). Windage tray and main support were also installed. The non-ported Cobra heads are milled and have a 5 angle valve job (lightweight valvetrain -springs, valves, titanium retainers, 1.7 rockers, etc.). Cam motion made the custom cam (230's/550's). Cobra intake is stock. Both the heads and intake are from when the car was ran in NMRA Factory stock class. Car is using the stock power steering pump, but the A/C is removed.
77 Pro M mass air and 70 mm Edlebrock TB
30 lbs injectors, MSD ignition 6AL, Two Step, 255 lph Holley fuel pump, Aero Fuel pressure regulator.
Kooks LT headers, Kooks O/R X pipe, SLP Loudmouth
Tuning software: PMS Generation 4
The remainder is still the race setup from when the car ran the Factory Stock class (weight still removed).
Additional tricks were used, but those above are the big items. For those who don't follow NMRA, in the Factory stock class, some are using the same heads/intake combo as I but with less cubes and a .480 lift maximum on the cam specs. They are making very similar HP as I.
There is still more power to be found in the my combo as I am light at 350 rwhp / 376 rwtq (humid day). But the track is the true test as the dyno is simply a yard stick when tuning.
I agree, aftermarket heads/intake would signicantly increase power, but the maddening spend on the car has to stop somewhere.
Blood on Blood
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Blood on Blood
New Member
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- Sep 8, 2007
- Messages
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- Reaction score
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Edit
Venom351R said:
ALL Volume numbers are in CCs.  ALL Flow numbers are in CFM. Cylinder Head Flow Data at 28 Inches of Water
As far as flow??
AFR 185 58cc Street/Strip 2.02/1.60 valve
267in/185ex @ .500 lift
129/118 @ .200
189/153 @ .300
234/178 @ .400
267/185 @ .500
277/191 @ .600
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