I just put a 355 SBC in my 1992 Camaro

got everything hooked up and timed

but everytime you rev it up it back fires through the carb

i tried tuning it but it didnt seem to make a difference

what do you think?

ive heard bad cam or maybe even a bad carb?

 

'92 RS?

355 swap?

Tune?

Carb?

Need something to go on. Bunch of scattered information that no one on earth could put together to give any sort of useful information?

Tell us about the rebuilt 350. What was used to put it together. Heads. Cam. Intake manifold. Distributor. Carb. Need some information.

Is the exhaust stock? What do you have?

What do you call "tuning"? Need some hint about what you did in that arena.

 

maybe you have your plug wires crossed. I had the same problem with my car. Im not sure of the firing order but do a search on a v8 firing order for a chevy. thats what i did, hope this helps.

 

I have a 650 cfm Edelbrock Carb

202 Heads
Flattop pistons
Stock cam
Edelbrock Torquer II intake
Stock Distributer
Exhaust-Shorty hooker headers with straight pipe to Cherry Bomb Glass pack
High Nickel Block
Tuning i mean by turning the 2 screws on the Carbureator

Any other information needed?
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And all the PLugs are in the Correct Firing order i triple checked them becasue if that was the problem i would be pissed

but good thought

 

Yes. Still no clue about the "stock" stuff. Stock for what?

202 heads doesn't mean anything, either. The size of the intake valve doesn't define the heads.

Backfiring such as you describe is typically caused by either 1) severely retarded timing (How did you set the timing? By the way, stock what distributor?); or 2) leaking intake valves (Have the heads recently been freshened up by a competent shop? Are the rocker arms properly adjusted?); or 3) vacuum leak.

I've got no love lost for that carb or intake manifold, but I doubt they are your problem.

 

The intake and Carb suck ***** but the dude i bought it from gave them too me so im like what the hell

Ill get a video up of me startin the engine