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

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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?

haha power valve?/?? haha im lost.. but the carb is only about 3 years old.. and i bought it new.. from jegs... still havent found any time to check for vac. leaks... and i also need to get a timing light...

Originally Posted by tim_bo16

haha power valve?/?? haha im lost.. but the carb is only about 3 years old.. and i bought it new.. from jegs... still havent found any time to check for vac. leaks... and i also need to get a timing light...

Pull the fuel bowl off and then the metering plate.
The power valve screw's in to the metering plate.
Most are grey and have a brass plunger.

Sounds like it needs more initial timing, you are running a bigger duration camshaft and a small bored motor, and the smaller the cubes the more radical the camshaft with feel. Try running a higher intitial advance, you didnt say what your initial was, try setting it at 16-18 degrees. Test and tune.....every hotrodders dream.

Originally Posted by 81 cabellero

Sounds like it needs more initial timing, you are running a bigger duration camshaft and a small bored motor, and the smaller the cubes the more radical the camshaft with feel. Try running a higher intitial advance, you didnt say what your initial was, try setting it at 16-18 degrees. Test and tune.....every hotrodders dream.

For total timing I would start at 36 and try it.
Keep advancing it until it "rattles".
If you hear it "rattle" back it off a degree at a time until it goes a way.