Quote:
Originally Posted by GoldOlds
I was always under the impression roller tip rockers are a good way to "free up" a few hp. As for the carb; I'm not against hanging on to the Q-jet that's on there now, although all the carbs I've ever used had electric chokes. This one seems to be vaccum operated (like I said before, I don't know carbs very well) with a little lever that goes down into the intake manifold. Exactly what it does down there is beyond me. Do Edelbrock intakes make provisions for this? Anyway, the only problem my Q-jet has now is that it bogs to the point where the engine almost stalls when I apply more than about quarter throttle from a stop. The engine idles a bit high too, but even a carb dummy like me can fiddle with that.
- GoldOlds
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Well, I suppose you would experience less friction with roller tip rockers compared to stockers and if you want to use them it's your choice.
The choke you described has a connecting rod that is attached to a bi-metal spring housed in that little box on the manifold. The spring activates the choke plate when cold and as the engine heats up the spring uncoils some causing the choke to back of slowly. With electric chokes a small electric current does the same thing and you don't have to have that rod and the external linkage associated with it.
Your Q-jet is probably bogging because it isn't adjusted correctly or could be it isn't the correct carb for your engine. A previous owner may have put it on and it might not have the correct needles and jets for your engine. Lots of variables there that remain un-answered. My immidiate response to your description is that the accelerator pump may be too large or mis-adjusted. I don't have a lot of experience with Q-jets either but it might be a great carb for you engine and just be needing a good tune-up. Post the numbers off the side, there are some guys here that have references and they could tell you if it is the correct carb for you car. That might be a first step.