My problem is back firing thru carbs when i rev past 3500rpms. I have timing set at 34 total and i have pulleys to run only 5lbs of boost. Gauge says im only at 1 lb of boost when it back fires. I have power valve plugs on all sides of carbs. I have 92 jets all the way around and 31 and 25 squirters. I have a boost timing master set to take out 2 degrees of timing per pound. This is what i have.
427bbc 8.7 compression
345cc dart iron eagles.
850 dp holleys.
I have a feeling its to much jet or timing not like 34. i ran the car with power valves in front only and had no issues,but when i put plugs in front it started acting up. Also sometimes i get a big puff of smoke out the headers if it dont back fire thru carbs. Thankz for any comments
427bbc 8.7 compression
345cc dart iron eagles.
850 dp holleys.
I have a feeling its to much jet or timing not like 34. i ran the car with power valves in front only and had no issues,but when i put plugs in front it started acting up. Also sometimes i get a big puff of smoke out the headers if it dont back fire thru carbs. Thankz for any comments