I am not sure wha the deck thickness is with the RFD Edlebrock 24 deg conventional head. I know these are heavy duty though. I also know there is more than enough meat to do a .175 angle mill or more if needed with them. That brings the chambers down to a 102.5 cc size which with my Cutom EEP/BRC nitrous pistons and nitrous clearances ends up with a tad bit above 12.00 -1 compression. It actually measures with a 9 cc piston dome to be 12.22-1 compresion ratio.
I also know the flow sheets that come with the RFD head are real and good measurements with no advertising bull.
We checked the head after the angle milling and the intake flow numbers in cfm and pattern came closer to matching Curtis' chart tan I would have thought possible. There was a slight difference in the exhast measurements, but for two benches in two different states to agree about the same heads on intake is totally unreal!
This was designed and built to be driven on the street with maximum nitrous horsepower as # 1 consideration, not N/A Power. It was built to do as much as 1,800 hp on N2o. On nothing but motor with Sunoco 110 we got 951 hp at 6,900 rpm and 786 ft lbs torque at 5,800 rpm . VE was 114% with big carb and carb was pulling 1351 cfm. IF it were designed and built as an all motor N/A Engine, no doubt in my mind the VE would have been more efficient and the Hp numbers would have been up.
Engine is a 622 cu in, Street/Strip/Car Show engine
4.625 x 4.625
Pistons are custom EEP/BRC 9 cc w/ lateral gas ports. wt-675 Gm
C.D. - 1.210
Pins -Hoffman Machine H-13 Tool Steel .180 taper weight 150 gram
Heads RFD EDlebrock - 2.350 In & 1.88 ex CNC
http://www.raceflowdevelopmnt.com
Intake Edlebrock Super Victor port matched only for test. Now w/ ported plenum by RFD. (not yet re-tested)
Rings are Total Seal 1/16 -1/16-.3/16 C-33 AP Stainless top- ductile second Std oil rings
Rods are GRP Pro- 5300 6.660
Lifters .904 - special Us Gear and Tool sold by Bullet/Ultradyne pressure fed rollers.
Cam design EEP/LSM
282 in @.050
304 ex @ .050
115 Lobe Separation
Cam lobes intake - .470
Cam lobes ex - .470
Quench/squish - .075
Had dyno problems with engine so now going back on dyno again with ported intake and problems solved. Horepower N/A ?? Who knows.
I know this. possibility of 1,000 or more Hp N/A with conventional heads if built as N/A. at 12.00-1 compression. At 11.00-1 compression this could be a 92-93 octane pump gas driver.
RFD Edlebrock Victor 24 Deg Heads ROCK
Thanks Curtis Boggs!
www.raceflowdevelopment.com