75 scamp 318 engine problems

George Jets said

AVS 2 is a 650 cfm carb they are too much for the 318s, have tried this.

We took the same AVS 2 carb and put it on a stock build 360, and it ran perfectly, no adjustments, no tuning needed.

Need more displacement for the AVS 2 to work properly.

Put on an Edelbrock 1406 600 cfm carburetor. Your 318 will run perfect with it right out of the box.

View attachment 1716340688

1406 on a 318, yep runs perfect.


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He could adjust the carb he has first before getting a whole other one. I have an AVS2 I've tuned on my stock 360 after running a 1406. AVS2 is more sensitive to the idle and light throttle cruise mixture being too lean and causing an off-idle stumble. Could also be a bunch of other things, we need more details on exactly what it's doing. "Stab the gas hard" does that mean WOT from a stop or just giving the gas pedal a small sharp jab? How does it drive if the pedal is pressed gently?