Originally Posted by midblue91

Are you serious, your wife knows shes out of her league with her mach1...I know this is a chevy site, but please show no respect to 4 valvers, i dont own a 4 v or an LS1, but my buddys have had them all, im a foxbody guy if im racing, a mach 1 may only be 281 cubes, but lets face it, an ls1 wont make even close to the power per cube a 4v will, hence a 4v will make just as much rwhp with the same mods....short of modding the internals, it has the ability to make more power....especially power adder to power adder, especially boost, a stock untouched 4v 281 can do 600+rwhp and 600+rwtq on a stock engine with a kenne bell or whipple....give me a break

Originally Posted by Arc00TA

Nice runs, and I have a question for the stang guys. I was talking to a dude with am 04 GT the other night and he was showing me he had a switch in his dash to change the tune. How does that work? I wish I could have a gas mileage tune and a performance at the flip of a switch.

Originally Posted by Bitemark46

Highest non forged 4v motor that I know of was Brian Bradford. 98 Chrome Yellow cobra with an S-trim at 19lbs made 603rwhp and went 10.51. It was the poster child of MJS chips. Tried to up the boost more and made a threw a rod. The car was rebuilt raced a few times then parted out.

Good kill to the OP. I might swap heads to that of a Mach 1 and go LS1 hunting.

-Mark