ok, i have an 86 camaro that came with a 305 4bbl LG4. i put a 350 in and put the stock cc distributor and cc carb back in. then removed the computer control and feedback from the carb and put a non cc hei distributor in. my car just doent seem to be running right.do i need to make any adjustments to the carb because it came of the 305 to a 350. i don't have any expirience in carbs but am trying to learn. this in my first car and i'm 17 so i'm trying to learn as much as i can . any help would be greatly appreciated. thanks, justin.

 

if i've read this right, you have a non--cc dist now, and a cc-carb, but with nothing plugged into it?

nope, can't do that. Have to get a non-cc carb. Go grab one from a old cutlass or something, from the wreckers.

 

Put the CC stuff back in. It doesn't hold you back in the least.

 

 

It's either all or nothing as far as computer controls work. Take it all off, or put it all back on. As stated, and I agree, putting it all on is in your better interest.

 

ok but doesnt the computer still think the motor is a 305? but its a 350 so from i think it would be better to put an older rochester on than the cc right?

 

Read my lips - errr, sig...

That's a CC set-up. The ECM really doesn't have to think too hard on the carb set-ups. I'm sure there are guys that have gone faster with a CC carb set-up, but I haven't worked very hard at perfecting this one.

 

really? You think there's some bugs to work out, and better times to come?


The cc doesn't really know what engine it's on, it only measures airflow basically, and adjusts. You can change the jetting on it, and move its area of adjustment around, but the cc is still good as far as fuel economy, etc...

I don't use it, as mine was broken when I got the car, and parts were non-existant, so I use a non-cc carb..... but that's another story...

 

I made the basic adjustments, that's all. Nothing taylored to the larger cubes. The part I haven't really worked on hard is optimizing it for the quarter mile - 2.93 gears, less stall than it could use, no weight reduction, etc.

Don't forget the factory put these systems on 350's, in B-bodies.

You may have to tune the secondaries, but they probably weren't optimized for the 305. Again, nothing specific to larger cubes, just basic tuning. The same type of secondary tuning you'd do with a non-feedback carb. But, overall a lot less tuning than you'd have to do with a non-feedback carb.

(Technically, the part about measuring air flow isn't correct. It measures exhaust O2, makes mixture decisions based on that. It also measures vacuum, but that is more for timing than it is for mixture.)

 

hahaha....hey man...like to see more young people like myself interested in thirdgens.....I am almost 18 like you and I built my first engine at 15.....(shhhh....dont tell...ive been on the board close to since then)... good luck on your car