John_Niemi

I have recently purchased my first mustang, a 1991 Lx. This car already has modifications and I was wondering if someone could tell me what to expect out of it, here is the list the guy gave me, not too sure what everything means.

E303 Cam
Heads Cut .040
Big valve springs
1.7 RRs
Cobra Radiator
Aluminum Driveshaft
Lower temp thermostat
3.73 Gears
Pro 5.0 Shifter
65mm Throttle Body
Mac headers and exhaust

A rough hp estimate and/or quarter mile time would be appreciated, thanks in advance

lookinforastang

13's with slicks

take it to the track

88BlueGT

is it a 5spd or auto ?

John_Niemi

its a 5 speed

88BlueGT

E Cam- Ford Racing Camshafts E303; Hydraulic Roller Tappet, Advertised Duration 282/ 282, Lift .498/ .498
1.7RR - 1.7 Roller Rockers

Everything else is pretty much self explanatory.

gspfunk

Here's what each of these does....

E303 Cam--already explained above--basically more lift than stock cam
Heads Cut .040--raises your compression--higher octane gas?
Big valve springs--compensates for the E cam and 1.7 rockers
1.7 RRs--increases the lift on your E cam from .498 to .529
Cobra Radiator--better cooling
Aluminum Driveshaft--reduces rotational mass of drivetrain
Lower temp thermostat--helps keep engine cooler
3.73 Gears--no actual HP gain, but will make your accelleration much better than it was stock
Pro 5.0 Shifter--short throw shifter makes shifts closer together and quicker, easier
65mm Throttle Body--allows more air into the engine
Mac headers and exhaust--increases exhaust flow

I would upgrade your MAF to 75-76mm. It'll give you some more power by letting more air into your engine. The stock MAF is 55mm and it's choking you down right now and keeping you from getting your full potential out of the motor.

This is just my guesstimate, but I'd say your pushing ~275ish at the flywheel, maybe a little more. Getting it dyno'd is your only true way to know. You should be in the 13's in the 1/4 if you know how to drive and have sticky tires.