Quote:
Originally Posted by vic guilmino
280,300,315,330
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The 315 HP engine uses one 4 barrel Carter AFB 27685 or 2767S.
It is rated at 10.5 comp. with 65.0 CC's in the heads.
.000 Deck
1.5 rockers
Valve springs are again inner and outer.
Outer is 62 lbs closed and 131 lbs open
Inner is 55 lbs closed and 120 lbs open.
Now the cams allowed are a story of their own. After the NHRA disallowed the E-2 and E- 3 Isky cams the OEM cam was a Hyd. with .411 on Intake and Exhaust. The checking clearance for both intake and exhaust are 5-11. The Intake duration was 283 degrees The overlap was 60 degrees. Exhaust duration was 293 degrees.
If anyone wishes to run an IHRA "Pure stocker" The Isky E=2 and E-3 are still legal I think. I have the specs for both on an IHRA spec sheet dated July 1 1968 and have never been disallowed. The duration is the only difference between the two Isky cams. The checking clearence is .023 for both cams on both Intake and Ehaust. The E-2 cam has a duration of 270 degrees and an overlap of 58 degrees. The Ehaust has 270 degrees also. Cam lift is .450 on Intake and Exhaust for both the E-2 and E-3 Isky cams. The E-3 cam has a duration of 274 degrees on the Intake and Exhaust along with 56 degrees overlap. Both the E-2 and E-3 Isky cams are SOLID LIFTERS.The head gasket listed on these two combos are .045 thick compressed. I would assume that all the other engine combos would have the same head gasket.
The only difference between the 315 HP combo and the 330 HPcombo is the intake and carbs. The 330 HP uses 3 two's Rochester Front 2G-7011705, Rear is 2G-7011707, and the center carb is 7011706 or 9.
Hope this is what you wanted. Its confusing so if you need a "translation" let me know.
Terry