Cam Selection
I'm thinking that the cam in the Chevelle needs to be a little bigger. Right now I'm running a Comp Magnum solid roller part number 11-692-8. Specs on the cam are as follows:
Lobe lift - .3666/.3666 (I run a 1.6 ratio rocker)
Dur @ .050 - 246° /246°
LSA - 110
Valve timing at .015
I/O 38 BTDC – I/C 70 ABDC
E/O 78 BBDC – E/C 30 ATDC
These specs are for 106 Intake Center Line which is what I installed it at.
I set valve lash at .018.
The specs for the engine are:
454 BBC
12.25:1 compression
Edelbrock Performer RPM heads part number 60559 with mild porting on the exhaust side. I just recently installed new valve springs that match the current cam which are part number 929-16.
Victor Jr intake with Holley 850DP built by The Carb Shop. Flow 900+ cfm.
MSD billet distributor, MSD 6AL, MSD Timing Retard
Hooker Competition headers (2inch primary 3 ½ collectors), 3inch exhaust with Flowmaster 40 series mufflers
The cars specs:
3500lbs with me in it.
TH400 with B&M Holeshot 3000 (flashes to 3600)
3.73 gears
28x10.5x15 slicks.
So what do you guys think? Do you think I’ll pick up some power with a bigger cam? My concern is that with the 3.73 gears and only a 3600 flash that I’ll loose too much bottom end and it will hurt my 60ft making the car run a slower ET but have a higher MPH because of the added upper end.
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