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I've got most of the info in "How to Build Chevy Rat Motors" . Good book I picked up at Summit. Let me know the specifics, and I'll either write them, or post on my website for you.

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1970 Chevelle SS Clone 502-540HP-560ft-lb
1992 Trans Am Conv(4Sale)
1992 Taurus SHO
Mercer, PA
sswinger.home.att.net/
[email protected]
 

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Discussion Starter · #3 ·
i would like to know the stock cam specs for a '69 396/350 hp
and the exact differences between the 325 hp vs. the 350 hp - i know the cam is a little hotter in the 350, but not sure if that was the only difference between the two motors.
thanks, mike
p.s. i found this in the archives:
A 1967, 396ci, 325hp valve lift is .3983 intake and exhaust. For the 350hp valve lift is .4614 intake and .4800 exhaust.
is this true for the '69 also?
with a new comp cam 280h in my 396, guess it really doesn't matter if the motor was a 325 or 350 hp if that was the only difference - COMPETITION CAMS CAMSHAFT SPECIFICATION SHEET
PART # 11-208-3
GRIND NUMBER: CB 280H-10
ENGINE: CHEV BIG BLK 396-454
INTAKE EXHAUST
VALVE ADJUSTMENT HYD HYD
GROSS VALVE LIFT .520 .520
.006 TAPPET LIFT 280 280
VALVE TIMING OPEN CLOSE
AT .006 INT 34 BTDC 66 ABDC
EXH 74 BBDC 26 ATDC
THESE SPECS ARE FOR CAM INSTALLED
AT 106 INTAKE CENTER LINE
INTAKE EXHAUST
DURATION AT .050 230 230
LOBE LIFT .3063 .3063
LOBE SEPARATION 110
THIS CAM SHOULD USE SPRING # 911-16



[This message has been edited by mike brown (edited 12-26-1999).]
 

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To the best of my knowledge, you have already answered your own question. I believe that the cam is the only difference, from 67 to 69, no changes that I know of.


------------------
1970 Chevelle SS Clone 502-540HP-560ft-lb
1992 Trans Am Conv(4Sale)
1992 Taurus SHO
Mercer, PA
sswinger.home.att.net/
[email protected]
 

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