Help me get into the 12's for cheap

Real simple combo that put my 3200lb (with me) car into the 11.80's.

360 Magnum
Stock shortblock (simply freshened with new rings and bearings)
Stock heads (cracked even)
216/224, .506/.506, 114 cam, MP .525" springs, stock rockers
Edelbrock Airgap intake
QFT 650 DP carb
1 5/8" block hugger headers
MSD ignition

Auto trans (2004r, but 1-2-3 gear is very close to a low ratio 904)
3600 stall (9.5")
3:73 gear
26" tire

Very basic, and not optimum IMO, so there is still room to improve this combo. The changes I would make to better suite it to your application would be to:

1) Choose a cam better suited for a carbureted application. I chose that cam (which is just a mild efi cam) with the intention if running boost but never followed through with that direction. It ran good, but I always knew it wasn't optimum.

2) Due to the fact that obviously nobody makes longtubes for a mopar swapped RX7 I was forced to run block huggers. A set of basic longtubes would be an improvement.

3) I see you drive the car on the freeway so this may not be an option, but 3.91 gears would help also.


I'm not saying your car will run 11's with this combo, but I would expect high 12's depending on the weight of your car and how well the chassis works. If anything it would be very close. To run your 12's the car will need to 60 ft in the area of 1.70. Your 3.55 gears won't help this but I understand that screaming down the highway at 3500 rpm isn't the most pleasant experience.