Thread: ok i got my little 283 running again...

Tweet

When you change the cam/heads/intake manifold etc. you change the carb tune that is needed by the engine. That's why I was saying before that you need to set the timing with a light and then tune the carb. A vacuum gauge and a tach makes it really easy to tune the carb's idle circuit without guesswork. It will also help you find out if you have a vacuum leak or not.

I would think just based on what you have done to the engine that it is not running to rich; but instead running to lean, especially since you haven't tuned the carb yet...

Dutch

Originally Posted by Firechicken

When you change the cam/heads/intake manifold etc. you change the carb tune that is needed by the engine. That's why I was saying before that you need to set the timing with a light and then tune the carb. A vacuum gauge and a tach makes it really easy to tune the carb's idle circuit without guesswork. It will also help you find out if you have a vacuum leak or not.

I would think just based on what you have done to the engine that it is not running to rich; but instead running to lean, especially since you haven't tuned the carb yet...

Dutch

I don't think a 600 Holley on a 283 would run lean un-less some really droped the jet size down.

Originally Posted by erik erikson

I don't think a 600 Holley on a 283 would run lean un-less some really droped the jet size down.

Yeah you may be right. Only thing I was thinking was that since the carb had been previously tuned (I am assuming to the lean best setting) for the stock heads, intake, cam etc. and then, without adjustment, dropped on to the motor with a bunch of new go fast parts in it, the idle circuit may be to lean....but hell, I've been wrong before...

Vac leak or if it's an older Holley a blown power valve.

Originally Posted by NTFDAY

Vac leak or if it's an older Holley a blown power valve.

If it where a vac. leak it would have raised his rpm's and he never said anything about that.
I wonder if he has put a light on it yet?