Re: Holley accelerator pump cam mounting positions
The holes shouldn't line up perfectly... the holes in the cam are usually about 65 degrees apart where the holes in the throttle linkage should be about 60 degrees apart (those numbers might be a little off, it's been a while)... so using the 2nd hole should require the cam to be rotated 'forward' 5 degrees, 'advancing' the cam, changing the working profile.
Are you sure both holes line up exactly? Like you could put a screw in both holes at the same time? It shouldn't be that way. Also, from my experience the green cam maxes out a 30cc pump, I'd be afraid to leave it on for more than just testing without upgrading to a 50cc pump. It just seemed like the pump was stretched to it's limit, and I wouldn't want to tear the pump diaphram, that's a fire hazard.
'97 F250HD 4x4 460; '85 Ranger, 350hp 289, T5, email@example.com
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