ok guys, im not too sure on this and need to pick a few brains real quick.

Got a free bie 350 that i will be building soon ( either L98 or 416 heads...all the works blah blah ) and it will have some nice performance goodies. but i got a question. Car is a 82 Z28 with LG4. Im keeping it carbed and will prob use the stock carb for a while. But will i have any problems going to a bigger engine while using the stock computer and Q jet designed for a smaller no power engine? thinking maybe i will, but not sure if the computer will be able to notice alot more air going in and change all the stuff to really let the 350 make power. Does it make a difference? And are there any aftermarket computer controled carbs or will i have to just toss the Q jet and live with computer problems with an after market carb?

 

no, you'll just have to tune the carburetor and probably the computer (donno, I haven't messed with ccqjets) ... the CC QJet will flow something like 875cfm or something crazy, search around the boards

 

I swapped out my 305 for a built up 350 in my 82 Z28. I had already gotten rid of the computer at that point along with the computer adjusted Q-Jet. I used the intake manifold and the Q-Jet I originally bought for the 305 for the 350 and had no problems. I did have to adjust the idle and the mixture for it to run right but that was it. If you're in search of more power you'll have to re-jet it and change metering rods and such, but it will still run great without many changes. I've changed my intake manifold and carb since the original build up, but I was more than happy with the original combo after living with the lame 305 for a year.

 

Check the magazine articles by Steve Green on this board (have "Stroke in the Desert" in the title). He did a CC 383 build.

Although he sent his carb and ECM to Jet for recalibration, that isn't absolutely necessary. The CC q-jet computer isn't all that smart - a more aggressive timing curve is about all you can expect out of a chip.

Check the tech articles on the board, too. Your carb may have the secondary air valve opening restrained, which may reduce the flow that a 350 could use. It's an easy fix, and one that Jet would probably do as well if you sent the carb to them.

There isn't any aftermarket CC carb, by the way.

I would recommend you pursue keeping the CC q-jet for a street car. Although the aftermarket alternatives are viable, the CC q-jet is the best compromise you can have for economy, driveability, and power. Sending the carb & ECM to Jet would cost you about the same as buying a new carb, intake, and distributor (maybe less, depending upon what you get).