General Category > Quadrajet Carb Talk and Tips

Need help with the jets and metering rods for a 305 chevy

<< < (2/5) > >>

jamon8:
well I followed cliffs advice and ordered my jets today. what would be the correct level to set my float at

Cliff Ruggles:
It really depends on the actual fuel pressure.  If you don't know what it is, start at 9/32", as some of those later engines used high pressure fuel pumps.....Cliff

jamon8:
I believe it is a high preasure pump. I will try 9/32 as my float setting

jamon8:
i put size 70 jets in the carb and I have to say that it starts alot better than it did. I think it has less power but I think that it was getting too much fuel and not burning it all with the bigger jets.

it seems to be lacking power just with the throttle cracked open a little bit. feels like it is kind of bogging down and not running like it did before with the bigger jets. there was a few times when it fell on its face and quickly recovered. and once going up a hill it lost power but I could not get it to repeat that after several tries.

All in all I think that it is running much better and I think I am going to raise the float level a little bit and come out another half a turn with the apr screw(hope that is what its called).maybe that will help get a little more fuel to the carb.

thanks for all your help and I will keep you posted on the outcome of the aboved mentioned changes

Cliff Ruggles:
Select jet size first, by doing some heavy throttle testing, climbing steep grades, passing without the secondaries, etc.

Once you find the ideal jet size, fine tune the APT for light throttle (normal) driving, smoothness right off idle, etc.

The APT is the key adjustment for this deal, as we spend most of our time driving on the primary side of the carb at light throttle openings.....Cliff

Navigation

[0] Message Index

[#] Next page

[*] Previous page