428 fe help

I ordered a 3.70 ring and pinion from Strange with refresh kit. I will attempt to ID the cam and see how the car performs with the new gears.

Thanks again

Dave

I was able to ID the intake it is a Blue Thunder as one of the forum members suggested, Thanks!!

Which Edelbrock cylinder head was probably determined by the exhaust bolt pattern needed in the mustang.

There are things to be checked to give you a better idea of what you're dealing with. As Barry said, first thing is to check the cam timing and valve lift - it does sound as if it is retarded.
Be sure you have enough intake valve to piston clearance in order to advance the cam timing if necessary. I have seen engines put together with the cam installed "wherever it needs to be" for getting enough clearance; damn where it's timed at. That's not a good thing but, sometimes necessary just to "get it together now" and fix it later. Being the car was auctioned tells me someone may have been in a hurry along the line.
IF that is the case, you WILL need a smaller camshaft.
IF that is not the case you can advance the cam you have 6 or 8 degrees to gain some torque.

dbran wrote:I was able to ID the intake it is a Blue Thunder as one of the forum members suggested, Thanks!!

Sweet! I'm glad to hear it. That's a very good intake. Now you can focus on the other stuff.

paulie

Just finished installing the new 3.73 gears. WoW . the car seems just right. never drops out of the power band. nail it a 10-20mph and it rips the tires off. hits second spins for about 2-3 seconds and chrips third! of course this is with the gt 500 oem tire size ( f70-15) . need to try it with some good tires.also I readjusted the valve lash.question? if I play with the exhaust lash and loosen it a bit will it increase cylendr pressure and make the cam act loke it has a little less duration and lift or does it need to be done on both intake and exhaust.or is it not reccomended. also wht is a good cold or hot spec

dave