Dope

iTrader: (2)

Somethin's wrong.

I lost ET when I installed my converter, but that's only cuz I couldn't hook up at all.

I went from 13.3's at 106 (2.1 60's) to 13.3-14.0 at 106-107 with nothing better than a 2.2 60' (mostly in the 2.4-2.6 range).

The fact that you lost about 2mph says that something is hurting. Try resetting the PCM and keeping the stock MAF. Something's screwed up there...

What's the STR on the stealth 3200? I only have a yank3000 (2.0 str) and it'll blow off the tires anything below 40mph or so. Spins wayyyy past the 60 mark at the track, on street tires. DRs are in store for next spring.

Seems odd that you only say it had a 'little' more torque and so forth. Mine was like night and day, the car is out of control now. (I love it!)

Dope

Magnus

iTrader: (4)

How were you launching the car with each converter?

meaning.....

What RPM's are you launching at. Are you flashing the converter or brake torquing it.

You should be flashing the converter.

If your flashing from idle, you could be bogging a little. If your flashing it from too high of an RPM you could stall at a lower RPM and not get the kick your looking for.

If you cut a 1.85, thats a reduction of .2 in the 60' which could equate to a reduction of .4 or so in the 1/4.

You need to work on your 60'. If your not bringing the 60' down with the new converter then you won't see the gain your looking for in the 1/4.

So, how were you launching the car?

Ragtop 99

iTrader: (7)

2.081 means you were spinning. That converter is only going to help off the line and if you don't have traction, you'll have no gain. I see no reason why that converter is not capable of 1.78 when launched properly with traction. That would put you easily around 13.0

As from a roll, that converter will provide mimimal or no gain.

Borrow some tires next time you go to the track and hammer it.

2000superZ

I was running BFG Drag Radials(15psi) at the track and tried launching both ways. When I rev'd it up to about 2000rpms I had a 2.16 60' with the car spinning until I hit about 30mph. And when I just mashed the gas I had very little wheel spin.

I'll admit I really need to work on my 60's, but I don't understand how the two almost identacle runs were off by so much. The top end just feels very weak.

[ January 28, 2002: Message edited by: 2000superZ ]</p>

MitchR

[quote]Originally posted by Ragtop 99:
<strong>2.081 means you were spinning. That converter is only going to help off the line and if you don't have traction, you'll have no gain. I see no reason why that converter is not capable of 1.78 when launched properly with traction. That would put you easily around 13.0

As from a roll, that converter will provide mimimal or no gain.

Borrow some tires next time you go to the track and hammer it.</strong><hr></blockquote>


I agree with Ragtop, when I first went to the track with stock converter and stock F1's on the back, it was very hard to tell I was spinning the tires on the launch because it made no noise and kept moving forward straight. However, it just felt a little like they were spinning and guys on the outside said it looked like they were definitely spinning. Sometimes it is just hard to tel if you are going forward at a decent rate and not fishtailing - those tires could still be spinning though. That is most likely the case, like I said the stock converter will spin the stock tires past the 60' mark so I don't doubt you are losing time due to traction.

- Mitch

RPM WS6

iTrader: (3)

The ETs are explainable by the poor 60 foots, but that mph still concerns me. I wonder if you’re getting any KR now with the MAF...

Magnus

iTrader: (4)

What RPM's were you flashing the converter from?

If you flash from idle, your idle could be a little low and you might bog a sec.. which would help with the traction.. could be the reason why you spun from stalling it up (Cause there was no bog).

You could try flashing it from 1000, 1200, 1500 and so on RPM's.. and see how that helps..

If you can't hook, its a wasted run.

If I spin at all more than say 10 feet I just coast to the finish line.

2000superZ

I guess I'm going to take it to the track this weekend with the Stock MAF and get my launch down and see what happens.

Thanks for the input <img src="gr_images/icons/wink.gif" border="0">

TITAN

iTrader: (1)

Chris,

I don't think that that converter will really get you any real gain on ET or (more importantly) mph...from the pic on their web page, it looks like a stock converter!

Joe

RPM WS6

iTrader: (3)

I think it is technically a stock ‘verter. I think Mike uses stock shells to make the stealth series. I agree that there should be no real mph gain, but the fact that there was a loss is something to be concerned about.

Ragtop 99

iTrader: (7)

The Stealth 3200 is a not a stock converter, it is not even the same size. It is close in size and the cover design is similiar.

I don't recommend the converter for F-body use. It is ok with 2.73 gears as it has a tight feel and good low end hit, but drops off quickly.

The Stealth/SLP 2600 is in the stock converter housing.

Raughammer

If your trying to compare "spinning" runs to each other. your just beating yourself up for no good reason.

If your spinning, you cant tell squat.

Either get some better tires, work on your technique or upgrade your suspension. There is no way to tell how much the spinning is hurting your times....or how much you would improve if you were not spinning. All the 1/4 mile data your posted is worthless, because of the "car spinning until I hit about 30mph" sentence.
ANY aftermarket converters forte' is it's ability to help you out in the 60' department. If your spinning at this time... you are completely screwing your new converters ability to help you.

Sorry, but if you can fix your "spinning" problem... you will "magically" find your lost e.t.

2000superZ

I know something is definitely wrong here but not sure what it is. I just had the Stealh Thruster 3200 installed with a Trans Cooler and Shift Kit. The only thing I noticed on this converter is a little more punch off the line, but not much. My car used to roar from a roll at 20mph and 55mph. Now it just feels flat. Now I did swap my stock MAF with a Pace MAF a few days before the converter install so I thought that might have been the problem. So when I got home I put the stock MAF back on then put about 40 miles on it to let the car relearn and the car STILL FEELS THE SAME <img src="gr_sad.gif" border="0">
Here are my timeslips before and after with like conditions:

Before (1/12/02)
60'-----2.009
1/4----13.335
MPH---104.91

After (1/26/02)
60'-----2.081
1/4----13.539
MPH---102.99

All I was hoping for was a solid 3 tenth reduction. So I figured I should be in the 13.0XX neighborhood.

What could possibly be wrong here? Any and all suggestions welcome.

Chris

Magnus

iTrader: (4)

How were you launching the car with each converter?

The aftermarket converter will really shine in the 60'. If you can't bring the 60' down with it, then its not very useful. The gains from going with a higher stall come mostly in reduced 60' and 1/8'th ET.

2000superZ

Like I said this converter has a little more torque, but not much. It feels like it's capable of a 1.85-1.90 60' and that's it.

Even if I pulled a 1.85 60' my ET would have been around 13.30X. Which is a reduction of 3 hundreths NOT 3 tenths.

That's why something is definitely wrong here.

RPM WS6

iTrader: (3)

What concerns me isn’t so much your ET but your loss of trap speed. That means the converter is either less efficient than stock or you’ve lost some horsepower somewhere. 102.X is a pretty low trap speed for even a stock LS1.

I don’t really care for the stealth series ‘verters. Maybe someone here with some experience in those ‘verters can chime in.

SSBoy

Chris,
were BOTH those runs done at the same track? Dont forget that weather could also play a role in it too. (gota think about the external factors too) Like everyone else said, TIRES TIRES TIRES...Fontana does not allow Drags which is BS in my opinion. If you want to really see the gain with that converter (or any other converter for that matter) get some E.T. drags. Its ALL in the 60ft. time...!