JERSEY DEVIL

is it worth it make more power by doing heads and intake on a 502 mag mpi, without a large cost and if so what kind of power increase would there be . the motor has a 500 efi cam in it and crane roller rockers from the same 500 and a upgraded ecu

Smitty

iTrader: (1)

How much power do you want to end up with?? The MPI intake in naturally apsirated form is only good for about 575-600 hp due to flow restrictions. If you add a supercharger you can see close to 800 hp with the right heads and cam and tuning.

JERSEY DEVIL

600 would be plenty

Smitty

iTrader: (1)

Swap out the heads, clean up the airflow on that intake setup. get a custom ground cam specific to the flow of the heads/intake and you will see around 600 hp at 5500 rpm. You will need to have ecm retuned again for most horsepower. I milled an inch off the runners to remove the restriction because they stick up into the upper plenum. It took a while but was worth about 20 hp and 200 rpms on top.

Call Bob Madera for Cam at 585-654-8583
and call Mark at Precision marine for head suggestions and ecm tuning.

JERSEY DEVIL

thanks i used mark for my last ecu upgrade

AIR TIME

I had my local builder do 3 upgrades 1st was a 502/dart intake stock 800hp carb and a cam 110 617 in ex 622 upgraded hyd roller cam/ 585hp at 5800/ next was change carb to 850 marine msd set up 600hp 3rd was new heads dart with 1050 custom carb 114 245in 254edx 622in ex 630 or close made 647hp with 850 and 670hp with 1050 block was changeed to 509 9.5 to1 from stock. this was over 6yrs pushed my baja ol 24 to mid 80s with a 2''shortie

baja27

Airtime what size dart heads did you use?

baja27

Ttt