General Category > Quadrajet Carb Talk and Tips

Which to use 1974: 7044212 or 1977: 17057202 on 1972 Chevy Big Block

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Dennis S:
Thanks for the response!  This is a great forum!
Cliff, just going through your book right now getting familiar with the modifications.  Haven't taken the carb apart yet.
I will definitely go with the electric choke from you, as well as the rebuild kit.
It's going on a '72 low compression (8.5/1) 402.  However, I hope to increase the compression to 10/1, and install a Lunati  10110701 Voodoo cam; duration (int/exh) 256/262, duration @.050 (int/exh) 213/219, gross valve lift (int/exh) .515/.530. 
Intake will be a edelbrock 7164 performer rpm, stock stall converter, 3:31 rear axle.
Haven't got through the entire book yet, which recipe would you recommend for this setup? 
Does this combo sound good?

Cliff Ruggles:
That cam would be WAY too smaller for the 402 with that much compression.  You would need a much larger cam to manage pump fuel in the 402, something around 280/290, 224/234 on a 112 or even 114LSA.....Cliff

Dennis S:
Good to know.  If I kept the compression at 8.5/1 would it be a decent cam?  Not looking to race it at the strip, but I'd like it to perform decently.  Also interested in the appropriate recipe.

Thanks

Cliff Ruggles:
It's still WAY to small.  A stock Chevy 350 cam had 274 degrees seat timing, and most stock big block cams were close to 300 degrees, and wide 115LSA.  That cam would be a complete TURD in a BBC engine build at any compression ratio.  You'd be better off with a stock replacement 396/427/454 cam from Speed Pro vs that little Vodoo grind, IMHO.....Cliff

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