High (ish) lift cam and later cylinder heads - carb needle advice

PeterZRH

Well-Known Member
Hi all,

The question is in the title. I have a mild Crower cam and the better flowing later heads with 4.6 valves and guides. The goal is to add 30 bhp and at least match what a good 3500S puts out at the wheels but with my ZF auto box in the way.

Obviously the answer is to get it on a rolling road but does anyone have any baseline recommendations for the jets on my HS6s? Currently these have KOs.

As a supplementary, obviously at higher revs without ideal jetting, the mixture is going to lean-out somewhat. Is keeping the KO jet for now and not driving aggressively likely to cause any problems for the short term?

Advice appreciated...

Cheers, Peter
 
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