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Originally Posted by scottj
I question 4 sizes up on the mains...that is a big jump. A stock Holley HP is about 2 sizes too rich on the mains. As I recall, this is a Holley HP from a custom carb shop, so it should be right-on as far as the mains. If this is a custom carb then you should go back to who ever built it. They know how it's calibrated and if they are good they know what needs to be changed to correct it to your engine mods...it might be something that needs to go back to them to recalibrate it.
Scott
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Yeah, that may be the route I'll go. I just hate to send my carb cross country and be without for 3 weeks, but I'm sure it'd be right when it got back.
Actually, it's 5 sizes up.
To fill you in better, I had the Ford crate 392, 430hp engine. I put AFR 185 heads on and a Victor Jr. intake. Those are the only changes I made.
Before that, the car ran perfectly. Very strong and streetable. This was on 71's in the front and rear of the carb. I'm thinking 73's in front and maybe 74's in rear to start with??
Perhaps the 76's I put in on Wednesday was waaaay too much.