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#2 (permalink)

09-07-2004, 10:47 PM

Jack21

CC Member

Join Date: Jun 2001

Location: Washington DC Metro (Virginia), VA

Cobra Make, Engine: Classic Roadsters, Tweaked 351W, T-5Z, CRII Tech Support Team.

Posts: 1,895

Not Ranked

Are you using a PCV valve? Carb sometimes needs to be jetted richer to adjust for extra air from PCV.

Are you using a hydraulic roller cam? These things really pull vacuum, and carb may need leaning out because cam works so well.

I have similar setup. 351W, 650 Holley DP, hyd roller, Ede Perf RPM. Holleys come from the factory with worst case jetting. For a more optimum street motor, they need leaning out.

I jetted primaries down to 64 - 65.

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