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My drag car is bogging when leaving the line. I leave at 1800-2000 RPM. If I floor it it will bog then ketch but if I leave at the same RPM and just rapidly depress the pedal it doesn't bog. Running two 1000 CFM HP holleys with 30CC front accelerator pumps and two 50cc rear accelerator pumps.
Would it help to change the rear pumps to 30cc? I'm running 30 degrees timing on a MSD 6al2 programmable.
Please note: It is not backfiring through the intake, it is bogging as in to rich but I have not noticed any black smoke.
Dart 434
Bore: 4.155
Stroke: 4.00
Compression: 8.6
Comp Cams roller cam
Intake lift .637
Exhaust lift .631
Duration @ .020 intake 300 exhaust .302
Valve timing @.050 intake open 21 BTDC close 63 ABDC
Exhaust open 71 BBDC close 13 ATDC
Installed @ 111.0 center line
Duration @ .050 intake 264 exhaust 264
Lobe lift intake .4210 exhaust .4210
Lobe separation 115.0
Brodix track 1 cnc 227cc heads with manley valves and springs
Weiand 6/71 blower .12 under drive
Twin Holley 1000 CFM HP carbs blocked power valves #94 jets all around
NGK 4554 R5671A-8 plugs
Would it help to change the rear pumps to 30cc? I'm running 30 degrees timing on a MSD 6al2 programmable.
Please note: It is not backfiring through the intake, it is bogging as in to rich but I have not noticed any black smoke.
Dart 434
Bore: 4.155
Stroke: 4.00
Compression: 8.6
Comp Cams roller cam
Intake lift .637
Exhaust lift .631
Duration @ .020 intake 300 exhaust .302
Valve timing @.050 intake open 21 BTDC close 63 ABDC
Exhaust open 71 BBDC close 13 ATDC
Installed @ 111.0 center line
Duration @ .050 intake 264 exhaust 264
Lobe lift intake .4210 exhaust .4210
Lobe separation 115.0
Brodix track 1 cnc 227cc heads with manley valves and springs
Weiand 6/71 blower .12 under drive
Twin Holley 1000 CFM HP carbs blocked power valves #94 jets all around
NGK 4554 R5671A-8 plugs