Thread: new combo

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OK, Gen I roller block bored 0.040", 357 CID. Decks adjusted for 9.011" block deck height. Keith Black hyper pistons #KB120, 7cc crown, 1.561" compression height, 5/64ths rings. 0.010" piston deck height with 9.011" block deck height. Victor Reinz #5746 Nitroseal Head Gasket, 0.025" X 4.100". 10.30:1 static compression ratio with 64cc heads, 0.035" squish.
http://kb-silvolite.com/performance....tails&P_id=157

Sportsman II heads, 2.02"/1.60", 64cc chambers with CompCams #986 valve springs or equivalent rate springs from another mfg. Seat load 132# @ 1.750". 322#/in rate. 300# over the nose on the exhaust lobe with this cam.

CompCams hydraulic roller, part #08-432-8, grind #XR282HR, 282/288, 230/236, 0.510"/0.520", 110 LSA, installed straight up.
http://www.compcams.com/Cam_Specs/Ca...?csid=189&sb=0

High-rise dual-plane intake manifold with 750 carb, VS or Double Pumper. Edelbrock RPM, RPM Air Gap, Weiand Stealth, Stealth Air Strike, etc.

1 3/4" long-tube, equal-length headers.

RPM HP TQ
2000 137 360
2500 174 367
3000 226 395
3500 289 433
4000 349 459
4500 402 470
5000 444 466
5500 471 450
6000 475 417
6500 455 368

I don't particularly like these heads. If you use enough cam to make the hp, it takes away from torque at the bottom. I like to see 400 ft/lbs @ 2000 rpm's for a good, stout street motor. These heads require 3100 rpm's to make 400 with this particular cam and I couldn't get there with any other cam that I tested on the sim. Went through 8 different cams on this combination before settling on this one. Should be used with a 3000 stall converter though, for best results.

I guess I've been ruined by seeing results using Airflow Research aluminum heads. This same combo with AFR 190 heads makes 522/490. Of course, the AFR's wouldn't make 400 @ 2000 either, not with this cam.