Quadrajet Problem Solving > Diagnose a Quadrajet carburetor problem

OOOPS!!!

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chance:
Just realized I didn't give the cam specs.... getting old isn't for the meek....lol The 383 has a 284/484 purple shaft cam. 284 duration, 241@ .50 intake and exhaust. 484 lift, 108 lobe separation.

Cliff Ruggles:
Vacuum is pretty low for that cam in your application.

I built the same exact engine many years ago for my 1970 Roadrunner, 906 heads, flat top pistons, and steel shim head gasket with the Mopar 284/484 cam.  It idled pretty good, with around 11-12" vacuum at idle speed.  I drove and raced that engine for several years before replacing it with a 440 engine using the larger 509" lift Purple Shaft cam.....Cliff

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