Originally Posted by Stone629

I also agree that 35 rwhp is pushing it. I disagree on some of the other stuff, Mach1man. The stock exhaust on the Machs is a 2.25 inch exhaust, with less than that in the bends. Its the same exhaust mid-pipe and cat-back as the 2Vs. You're right about the port matched heads to manifolds, but from the flange back is all the same. LTs will give you 10 RWHP or so, the tune will give you 10 or so, so it all adds up. I could see a Mach possibly putting down 320 rwhp with LTs, x-pipe, the right mufflers or high flow cats, other basic boltons, and a good tune. I don't know enough about those cams to comment on them. I'm not real big on dyno numbers though. There's just way to much variance and fudging going on. I know these mods make a difference, but they don't seem to really show on a dyno. I say put those mods on a track and see what they really do.

Originally Posted by Mach1man

Sorry guys, but I have to disagree. I think you're looking for unrealistic horsepower gains from an exhaust system and intake cams. Your goal of knocking your e.t. down by several tenths is well within the realm of the mentioned upgrades, but don't look for a 35rwhp gain from longtube headers and intake cams, ain't gonna happen, unless somebody cooks the numbers at the dyno!

People tend to forget, this isn't a corked-up 4.6L 2 valve motor here! The Mach 1/Terminator "C" heads are some of the best flowing modular heads out there, both intake and exhaust. The exhaust ports are flow port matched to the exhaust manifolds, and 2.5 inch pipe all the way to the tips!

The only real noticable restriction occurs in the cats and the mufflers, which is why a good non-catted, or high flow catted x-pipe, and flow through mufflers will usually gain you double-digit horsepower and torque increases on the dyno. Once you've done that, and then throw in longtube headers, they kind of don't make that big a difference! You might see 15-18rwhp on a stock or mild bolt-on Mach 1.

I'm assuming you intend to stay naturally aspirated, because there is no mention of any power adders here. If you truly want to go fast, the single best, cheapest, and easiest bolt-on you could do would be a 100 shot of nitrous. You would be in the high 11 second bracket as the car sits right now, with no problem, and still have perfect street manners.

Originally Posted by Justinr1001

I would love to see you hit low 12's man!

Originally Posted by Stone629

I'm not real big on dyno numbers though. There's just way to much variance and fudging going on. I know these mods make a difference, but they don't seem to really show on a dyno. I say put those mods on a track and see what they really do.