help with 383 dyno
09-21-2010, 09:50 PM
#1
help with 383 dyno so this is what i got a 383 fully forged bottom end,ross racing pistons,scat crank and rods,9:1 compression, 1-3/4 long tube headers with 3 inch magnaflow exhaust , edelbrock intake manifold, 52mm bbk throttle body, lloid elliots small blower cam, water to air intercooler, stock mass airflow, 60# injectors, tr6 plugs gapped at 30, aeromotive fuel pressure regulator set at 43.5, and 255 lph walbro with racetronics wire kit.
so this is my problem. so im at the dyno and bank #1 is running lean took the intake manifold off and pluged up all the fitting extra good and nothing still the same. then they hook up the tech 2 scanner and cylinders 1,4,8,and,2 are all misfiring, cylinder 1 way more than the others. it has brand new plugs and wires. im at a point were i just dont know what to look for or do. also the exhaust is good no leaks at all.
so this is my problem. so im at the dyno and bank #1 is running lean took the intake manifold off and pluged up all the fitting extra good and nothing still the same. then they hook up the tech 2 scanner and cylinders 1,4,8,and,2 are all misfiring, cylinder 1 way more than the others. it has brand new plugs and wires. im at a point were i just dont know what to look for or do. also the exhaust is good no leaks at all.
09-21-2010, 11:57 PM
#3
On The Tree
Join Date: Sep 2010
Location: Dunedin, Florida
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Not that this is your problem but I just found out this past week that depending on your heads you may need gasketed plugs. I am running AFR's and they all require it. With your setup I am sure you are probably running more then stock ported. GL
09-22-2010, 12:09 AM
#4
forgot to add it has stock 180cc dart heads, and a d1sc set up for 10 lbs of boost. as for the injectors they are racetronics. is there a way to check the injectors because with the tech 2 scanner they can turn off the injector and they noticed that the #2 cylinder wasnt dropping that bad when turned off.
09-22-2010, 03:35 AM
#5
forgot to add it has stock 180cc dart heads, and a d1sc set up for 10 lbs of boost. as for the injectors they are racetronics. is there a way to check the injectors because with the tech 2 scanner they can turn off the injector and they noticed that the #2 cylinder wasnt dropping that bad when turned off.
and yea you need a gasket seat plug .750 reach. I'd say an NGK R5671A-7 plug would suit you well. Hopefully you didn't crank down those tapered seat plugs and **** up the seating surface of the head.
