i've got this going in several forums, trying to educate myself on 4v's and the mach's/ 99-01 cobras. so here it goes

i know the mach 1's are 10.1 :1 and love the FI i've read that 8-9 psi is the farthest you want to push the boost to with the CR as high as it is. so could you retard the timing and get more boost safely? since im seeing that the timing @ like 15*-20* would kill the motor could you put it at 9-11* and put a smaller pully and have the boost at like 9-11psi and still be safe?

what is the limit to the block and internals? would an internal cooler help the power safely go up?

 

Mach's like the juice moreso that FI. Their higher compression isn't the most conducive to FI. And those that have went 'big' on the FI (Twin Turbo's or Procharger D1SC) have rebuilt and gone with a lower compression ratio. (See the compression ratio on 03/04 Cobras at 8.5:1.)

There are plenty of Mach's running around with safe tunes under 450hp to the wheels, and there are also some that have blown-up at a relative small psi. (I assume you have read through some of the threads on the mach1registry.com.) Again, seems the tune makes or breaks FI on Mach's.

And most definitely go with an intercooler.

 

i've read all the procharger stuff and power adder stuff in the registry, and im seeing people with 450+ with the procharger setup and intercooler and it seems they running hard and strong and long....would a KB or whipple do the same thing?....im scared of the gas.

 

I think so. Seems those that have gone with the KB are obtaining some good results on the dyno and drivability.

I have thought about this in my head over-and-over and if cost wasn't an option I'd go with the Hellion Single Turbo kit first, KB second, and P-1SC third. I ALMOST pulled the trigger last fall on a used P-1SC kit that was in GREAT condition, and a GREAT price, but never went through with the deal. Since cost is a factor I may go the P-1SC route someday but right now I am having a blast driving her with me current mods.

As of right now I am trying to drop weight, finalize my suspension so that I have a consistent 12.4-12.6 1/4 mile Mach (ran a best of 12.9 on stock drivetrain to date) that handles like she's on rails. I'm close on the suspension just need a panhard and Bilstein shock/struts.

 

so in your opinion which would be better? KB or p1sc- they're close to the same thing and i love the whine, but the p1sc seems to be a very popular choice for stock bottoms.

 

If cost isn't a factor, I'd go with the KB/intercooled. If both kits cost the same I think we'd see more and more KB on the street/track, but both are great packages.

If you decide on a P-1SC, it seems installation is easier on the 2003 Machs vs. 2004, and there are a couple very good threads regarding installation on M1R. I might in fact be subscribed to one or two.

 

heres the non intercooled 5psi KB $4799.99
http://www.need-4-speed.com/kennebell.htm

and the intercooled p1sc

iwhich one would you go for on those choices? and what is the limit on the internals on the mach?

 

I love my KB!!! Its been on the car for 3 years now and no issues so far.

 

Given those two choices I would go with the intercooled P1SC. Again, regarding the internal limits . . . it's all in the custom dyno tune, but I wouldn't want anything over 450hp. Good tune or not.

 

mike you have the KB GT right? how does it run?

 

drooling , thats what i want for my 97 vert! KB is my choice of FI on a 2 valve , if i had an 03-04 cobra block i would go with turbo though, that way boost builds slowly as you accelerate(ok so not slowly) it does help daily driving since your not trying to get 450-550 rwhp to the ground on a wet day !

 

Runs great but I second what someone said up above. It's all in the tune. I had mine tuned at by one of the best at Modular Powerhouse in Atlanta. They have one of the best reps for tuning 2v's.

 

Yes the KB reaches full boost pretty much instantly, but you can easily control weither or not you are in boost or not. This car is my daily driver and I have driven in rain, snow and sleet.

 

what are your numbers? are their any good tuners here in town (alabama)...how much does a tune cost?

 

381 rwhp 410 ft/lbs of torque on the daily driver tune
I could push more but I wanted reliability.

I know there are some tuners in the area but I don't know how much they charge and I know they don't have the reputation that Modular Powerhouse has. I didn't want to save $50 to $100 bucks on a tune and then have to pay a couple thousand dollars down the road to replace a blown motor. I think I paid $400.00 for a 5 position chip and 4 different tunes ( 93 octane, 91 octane, race fuel, and a valet tune).

 

mike, it sounds like you got one hell of a deal, what is a valet tune?

 

Engine will not go above 2500 rpms

 

LMAO, thats awesome. does anyone here have the P1sc? i looked at the KB and its gonna be expensive (more so) than other S/c's

 

blacknightmare has a procharger on a 2v

 

i couldnt remeber who had one, i was thinking someone did...the last FI car i got to drive was a tubro mach that WAF had.....that thing was amazing, i fell in love with it, and died over the price. it had 4200 miles pushing like 12psi 580rwhp 520ft lbs $23.5k i remember it like it was yesterday