What should i expectfrom my ATX?

[NC STANG GUY]

Back in the late 90's I had a 94' white ATX SHO.
Best it ran at Rockingham dragway was 15.26 @ 91 mph.
That was in good 65-70 degree air with low humidity. Rock is only 375ft above sea level too. Most of the time it ran 15.3-15.4.
Only thing not stock was the air filter which I doubt did anything power wise.

 

[Trusty89]

I had a 93 ATX that ran 15.30's @ 89mph all day long easy. That was with a K&N filter as the only mod. On a hot day muggy day it would run 15.70's.

My 89 was a quicker car but in a dragrace the automatic would beat it half the time without a good launch from the 89.

 

[SHOCH]

IMHO Run the rear tire pressure up, you're just dragging it anyway.

 

[silverknight]

going on wed to drag my atx 93.. rebuilt with shift kit, full 60/120k, synthetic blend hirpm q state oil, k&n, and 225/45/17 tires. see what it puts down.

 

[jmpSHO]

I'm going to take my 95 ATX to the drag in a week or so. Mine has 290k on it, original motor and trans. and very well maintained. High flow cats and magnaflow exhaust, CAI and hopefully and LPM with an 80mm MAF by then.

 

[SHOspazz92]

Ahh, but add clutch disk slippage, PP straps, PP fingers & throw out bearings along with Hawkeyes list & MTX failures greatly out weigh ATX failures!

A Clutch is a Wear Item, Something that's going to need to be replaced regardless. Obviously, Beating on a Wear Item makes it....wear out quicker.

A Transmission as a whole, Is not really a Wear Item. Clutch Job? 900 Dollars on the very high side (That's assuming you have someone do it). Transmission Rebuild? 2,000 on the Low side. As far as Snapping 3rd gear? That rarely happens. It Generally happens to the same people over and over again (TIM!) that are making a lot of power. The Number of Folks who are making enough power to **** 3rd gear is very, VERY low.

Do MTX's Fail? Yes! On the same, Catastrophic (AND COSTLY!) Level that ATX's do? NO.

-Sam

 

[Ian Macoomb]

Don't forget to post results. Good or bad.

 

[silverknight]

um..... 15.89 @ 86mph... motor mounts shot, rear suspension shot, front bank ypipe gasket leaking, at least one vac leak. missfire somewhere... hopeing to be a whole lot quicker in the spring.

 

[silversho89]

Do atx cars really spin much in stock form? I wouldn't think they would much. With the higher drivetrain loss, lower rpm launches, more weight Id imagine those are all factors working against you. Can you just brake launch it as high as possible until the car overpowers the brakes?

Btw, what is the stock stall speed and does flashing help you atx guys much? It helps me in the camaro a bit. I'm able to go about 1800 iirc. I also use the ebrake for extra hold on the rear wheels.

I've never drove an atx. I'd like to tho.

 

[hawkeye18]

you can really brake torque the **** out of an ATX SHO and it still won't spin a whole lot. I normally take mine up to about 2400. They're nothing if not consistent.

Flashing helps tremendously, especially on the 1-2 shift. You can control when and how hard it happens. There is also some power to be gained out of messing with fuel/spark tables on the way up, etc. UDPs help also. I wish the stall would be a little higher, it still bogs a little at 2400, and that's about as high up as it goes lol.

 

[silversho89]

Wow 2400? I didn't expect it to go that high stock. I guess since there's more of a rev range, they stall them higher. Anyone make stalls? For f-bods, people usually drop about .5 sec eith a 3400-3800
stall. Still strertable too. Wonder the gain and street manners for das sho.

 

[silverknight]

on the 93 with the stock 10.2" i can go to about 2200 on the street before it starts moving. the crap part about the atx is the ebrake wont set with the car in gear. i might use my spare center console and do some development on a center handbrake from something. move the cable setup to the center of the underbody and make it work.

i might try swapping to a d4ui computer that i have sitting around and see if that helps things out a tiny bit. but i might just get a superchips dynotuned after i do some more work on the engine side. got spare intake to port the **** out of. i want to drop a whole second off my current time. and maybe swap in a 75 shot to get low 14s.

 

[Ian Macoomb]

Early on, when I first got my SHO, I did some testing and didn't find much difference at all when brake torquing it. Now all I do is rev it up a bit over idle, say between 1000 and 1500. More than just heats the fluid up and then the tranny shifts at lower rpms.

And with my V8, I barely ever got any wheel spin.

 

[hawkeye18]

well ****, our tachs are so famously inaccurate that 2400 on mine could've been 2200... according to the tach I could brake it to 2600 so I guess that sounds about right having been 2200. In any case, I had quite sticky tires; I could get 'em to chirp once, maybe twice, but that was it. After that, I was gone! Next stop: 7800 rpm...