OLDER ENGINE SPEC's

[vic guilmino]

280,300,315,330

[X-TECH MAN]

Oh gezzz man...Thats a lot of typing. I will send you one or 2 now and the other 2 later this evening. .

[X-TECH MAN]

Originally Posted by vic guilmino

280,300,315,330

The 370 cu inch 280 HP you requested is 285 HP in the spec book.
Its rated at 10.0 compression
uses 1 4 barrel Carter AFB-2768Sor 2767S
1.5 rockers
70.2 CC's in the head
.000 Deck
uses inner and outer springs
Outer is 60 lbs closed and 109 open pressures
Inner is 26 lbs closed and 60 open pressures
Cam is Hyd. and has a checking clearence of 5-9 on the intake. The duration is 273 degrees and the overlap is 55 degrees. The intake lift is .411.
The Exhaust has a checking clearence of 5-11. The duration is 282 degrees with a lift of .411 also.
The intake valve is 1.880 and the exhaust is 1.600.
The head # is not listed and the head gasket is not listed either.

[X-TECH MAN]

Originally Posted by vic guilmino

280,300,315,330

Vic...The 300 has the same spec as the 285 HP except for 3 two's, 65.0 CC heads for 10.5 comp. and the valve spring pressures are different.
The carbs are Rochester 2GC's Front carb is 7011705, Rear is 7011707, and the center is 7011706. The spring pressures ar Outer 62 lbs closed and 131 lbs open.
The inner spring is 32 lbs closed and 96 lbs open.
Same deal on the head casting # and head gasket thickness.
This is right ff the NHRA spec revision dated 7/17/70.

I will try to send the 315 HP and the 330 HP later this evening.
Terry

[vic guilmino]

thanks terry

[X-TECH MAN]

Originally Posted by vic guilmino

280,300,315,330

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

[vic guilmino]

what is the difference in the 300hp and the 330hp
there the same right

[X-TECH MAN]

Originally Posted by vic guilmino

what is the difference in the 300hp and the 330hp
there the same right

No.... different cams and inner valve spring pressures. You can use the Isky E-2 or E-3 solid lifter cam in the 330 HP. Different duration and overlap and inner spring pressue even if if you stay with the Hyd. cams.

[Wade Mahaffey]

Terry, how about the Super/Stock 283 1-4B Glide in 58 and in 60 Corvette. They are both 230 factored to 225 today. Thanks

Wade Mahaffey

[Rich Biebel]

All the solid cams listed for Pontiacs were dealer installed options and never were assembly line installed. Mckeller design, Isky produced. Not allowed after NHRA knocked out any combinations that were not assembly line produced.....back around 1969-1970. A '58 Pontiac also could have Rochester fuel injection.....and that was an assembly line installed item.....HP was 315 with a hydraulic cam if my memory is correct....

My first nice car was a '58 Pontiac.....so I have a fond memory of those cars.

I'd love to have one today.....