i have upgraded my 305 lg4 motor to 350 cu in, edelbrock rpm heads,slp headers zz4 cam . In GM's H/O conversion the upgrade to the carb was to repl secondary metering rods. in the catalog it listed a part# for the new rods but it was a kit for like 90$. Has anybody done this conversion or know what i need to do this? See its not fast enough yet and richening this up should really help!

 

I would suggest 2 things (and I did the same with excellent results):

First - pick up all the secondaty metering rods and hangars you can (for a good selection of parts)

Second - buy and install an a/f ratio meter (preferably a wide-band). It will allow you to monitor the a/f mixture in real-time. You want to run approx 13:1 a/f for max power (some cars might need to be richer).

Tune to get it right on the money...... then enjoy

 

Here is the simplest thing to do. Go to a speed shop that will sell you QJet hangers and rods seperately. Most of them should do this for you and only charge around $10 for both. Get a B hanger and a set of DR rods. If you can't get the DR rods try for AY rods.

All this does is quicken and richen the secondaries but what a rocket ride once it's set up!!!

Then go to the Tech Articles on this site and read over the QJet articles. They show you a couple of really simple things to do with the spring controlling the secondaries that allows it to open much easier so you have snappy 4 barrel performance RIGHT NOW

The QJet is an awesome street carb once you do these two simple things!

PS You might have to go to a high volume mechanical fuel pump now that you have a healthy 350 running the show. Make sure you get the high volume pump and NOT the high pressure one. QJets only like to see about 6 psi tops, so the high pressure pump is bigtime trouble. Carter and Holly make high volume units for about $50 or so.

 

You might consider the .149 needle/seat as well.

I agree with the B/DR combo recommendation. Amazingly versitile.

 

Will that combo help my stock cc q-jetw/ 305, 268 comp cam and shorty headers..haven't gotten into the carb or chip thing yet? ...thanks

 

thanks guys found Edelbrock has them was 9$ for rods and hanger from Jegs! needed this !! :lala: