Holley jetting

[Jack21]

Little did I know when I started this thread that I would stir up the Holley Mutual Aggravation Society.

I didn't pick a Holley for my engine because it's synonimous with fast cars. No "Monkey see - Monkey do" involved. I picked it because I've always used them, and they always work, and work well.

I did look at the Demons as an alternative, but having no prior experience with them, I went with what I knew. Didn't consider the Edelbrock Carter AFB clone. Had one, it had problems, and it went into the trash.

My favorite football, as it were, was the ubiquitous Rochester Quadrajet. Some people could get them to run; I couldn't. The Qjet went into the trash, literally, the Holley went on, the car ran well.

Today, fortunately, there are more options. Pick what works for you. Just be prepared to dial it in to your unique engine - car - driving style combination.

The biggest mistake people make with carburetors is getting one that's too big for the motor. The second is getting the wrong type. A manual secondary (double pumper) on a heavy car, auto trans, low gearing will bog. Early Holley spread bores (all DP's)were notorious for this. Light car, manual trans, healthy engine that revs quickly will have better throttle response with a DP most, but not all of the time. Since the secondary opening is now under the direct control of the drivers right foot, the driver must be knowledgable in its' correct use and theory of operation. Example: You're chugging along at 30 MPH in 4th. Mash the throttle with a DP and the engine will bog badly, or even stall. Don't blame the carb for sloppy driving technique.

[Dominik]

jack,
when you started this thread you mentioned your engine running rich at idle (in the garage).

i thought this has nothing to do with the jetting.
more with fuel pressure too high, float level incorrect or just the idle mixture wrong or the power valves open.

or did i miss something?



dominik