ayrton02

I was doing a search to see what kind of gears you guys have stock and ran across this:

http://alternativeauto.com/misc/mach1_project.html

Not to put down the 4v, but 16-18 psi seems like quite a bit for cast, stock internals even with a good tune. Would any of guys run this much boost with a stock engine?

rygi23

I don't claim to be a guru on the subject, but this test was done in 2004 before much common knowledge came about on the subject of what the Mach's motor can handle and for how long it can handle it. The common consenses now is that boost (especially the amount in this test) is tolerable for a while before the motor lets go. Depending upon how much the car is abused, ofcourse. He messed with a rare piece too as the white '04 is the rarest Mach of either year, with only a little over 100 with an auto.

ayrton02

Don't you guys have nearly the exact same engine as the 99 and 01 Cobra's... so that should have been a good benchmark to judge tolerances of the motor. For a safe, solid, reliable DD, us v6 guys only do about 11 psi max with a s/c and around 8 with a turbo setup. Like nearly everyone else, the rods are the first thing that usually breaks then the pistons then the crank. Obviously the Termis came with the engine already forged, that's why people slap KB's on there and are good to go with a tune. I've never heard of someone with the *****/stupidity do it with a Mach 1/non-Termi tho lol.

Some guy in my town is doing a m112 on his Mach 1 so that should be sweet. Hopefully I'll get to see that sometime. I don't know how you would go about using a intercooler for the m112 on the Mach 1, but I guess you could rig something up. Guys are actually putting m112's on the 3.8s but the big disadvantage is the heat via lack of an intercooler. Actually the Procharger is the only s/c that we can use intercoolers with. The only way the v6 guys are cooling the m112's is with water/meth injection.

Anyways, just wanted to see what you guys think. And congrats to all in this section for having the best looking model Mustang to come out since the early 70s.

rygi23

One could say we have "nearly the exact same engine" as the 99-01 Cobra. There are differences which lead to around a 20 hp advantage for the Machs such as, but maybe not limited to, slightly more aggressive camshaft specs, better flowing heads, and higher compression. The latter, ofcourse, being the reason for Mach owners with some spare loot laying around to be more cautious with any kind of forced induction.

SleepyMach1

I'm not an expert on the 99-01 Cobras, but didn't some of them come with the Teksid Block that can handle unbelievable amounts of boost thrown at them. I know that the Mach 1's did not come with this, and obviously even with forged internals cannot handle 16-18psi for long.

ayrton02

For a daily driver, the Ford 3.8 cast iron block Essex can easily handle 16-18 psi with forged internals and a good tune. It was based mostly off the same engine found in the turbo Buick Grand Nationals. There are people who have 600+ hp still using the stock Essex block and a stock 4.2 F-150 forged crank (bored to a 4.3 tho).

The '99 Cobra's used the Teksid block. Most of the '01 Cobras used the Windsor Aluminum Plant block. Both were aluminum. The Termis used a cast iron block with forged internals. You guys use the Windsor Aluminum Plant block... which is unfortunately weaker than the Teksid. I believe you guys all share the same heads. I also think the crank on the Mach 1 was forged depending on the transmission... not sure of this though.

Furinox

There's several people running 1000 hp+ on a mach block. The internals are the weak point.

Adam99gt

The manuals came with a forged crank and the automatics did not. And yes Machs have the same heads as the 03/04 Cobras just with different cams.

P.S. I agree with you on the subject on this blowing up IMHO it might last for a while if you aren't running it hard all the time but I don't think that the stock internals (especially the pistons) can take to much boost for to long.

Furinox

Mach's have the same cams as 03/04 cobras.

USMCrebel

they can handle it for a very short time.