Whats Wrong Combo

Hey everybody,I have some questions that maybe someone can help with.I just got done building the engine for my 72 Duster.the engine started out as a 68 340.It's now a 416.Blocked was filled,decked,lined honed and bored 30 over.It has a Scat forged crank,12.5 Wiseco pistons,Eagle H beams,W5 Mopar heads(untouched except for oil drainbacks, machined away from guides)Harland Sharp 1.5 rockers,Engle 602/612 lift with 265/269@50.Im running an ATI dampener,Moroso 7qt pan with windage tray and Meziere electric water pump.The block and heads are also fully studded.Also has MSD Billet distributor and 6AL with 2 step.Have the engine running 36 degrees locked out.Was running a holley 830 that was borrowed,but just got an 850 Mighty Demon.Havent ran it yet with this carb.It's on top of a M-1 intake.Aeromotive fuel pump and regulator and half inch line from cell to regulator.The machine shop who did the work did a perfect job.Beautiful work.We assembled it.The trans is a 727, reverse valvebody with a GER 3500 stall and 4.30 gears in an 8.75.The car weighs 3054 with me in it.8 point cage and subframe connecters.The problem is it only runs an 11.80@ 112 quarter and a 7.20 @ 96 eighth.I was hoping for a mid to high 10 sec car.I thought the combo should put out somewhere in the 500hp range,but the numbers are not showing that.The tranny wont stall higher then 2200 off the line and i was shifting at 7200.Ive since put the numbers in a computer dyno and it shows peak hp at 5800 and peak torque at 5400.That same program showed 584 hp.Would shifting at 6000 pick up any time?And how about head work?It feels like something is holding it back.Any suggestions would be really appreciated.Lots of Ford and Chevy shops around,but not a single Mopar guy around here.Sorry for the long thread,just wanted to give as much info as possible.Thank's again.
Author: admin

Whats Wrong Combo

Hey everybody,I have some questions that maybe someone can help with.I just got done building the engine for my 72 Duster.the engine started out as a 68 340.It's now a 416.Blocked was filled,decked,lined honed and bored 30 over.It has a Scat forged crank,12.5 Wiseco pistons,Eagle H beams,W5 Mopar heads(untouched except for oil drainbacks, machined away from guides)Harland Sharp 1.5 rockers,Engle 602/612 lift with 265/269@50.Im running an ATI dampener,Moroso 7qt pan with windage tray and Meziere electric water pump.The block and heads are also fully studded.Also has MSD Billet distributor and 6AL with 2 step.Have the engine running 36 degrees locked out.Was running a holley 830 that was borrowed,but just got an 850 Mighty Demon.Havent ran it yet with this carb.It's on top of a M-1 intake.Aeromotive fuel pump and regulator and half inch line from cell to regulator.The machine shop who did the work did a perfect job.Beautiful work.We assembled it.The trans is a 727, reverse valvebody with a GER 3500 stall and 4.30 gears in an 8.75.The car weighs 3054 with me in it.8 point cage and subframe connecters.The problem is it only runs an 11.80@ 112 quarter and a 7.20 @ 96 eighth.I was hoping for a mid to high 10 sec car.I thought the combo should put out somewhere in the 500hp range,but the numbers are not showing that.The tranny wont stall higher then 2200 off the line and i was shifting at 7200.Ive since put the numbers in a computer dyno and it shows peak hp at 5800 and peak torque at 5400.That same program showed 584 hp.Would shifting at 6000 pick up any time?And how about head work?It feels like something is holding it back.Any suggestions would be really appreciated.Lots of Ford and Chevy shops around,but not a single Mopar guy around here.Sorry for the long thread,just wanted to give as much info as possible.Thank's again.
Author: admin