CRZYPWR

I was just wondering. For example having two cars... exactly same set ups.. lets say 451 rwhp. The only difference is one car is A4 with 3000 stall and the other one A4 with 4400 stall. Which one would be faster in race lets say.. off the roll starting at 40mph ?
Thanks

98_Formula

iTrader: (15)

it doesnt just matter how high ur stall is, it matters where ur power band is... u want to match ur stall to ur setup

BlackHawk T/A

iTrader: (3)

4400.

Wesmanw02

iTrader: (4)

Well he said both cars have the exact same setup. Only difference being the difference in the torque converter stall speed.

The only real difference is that the car with the 4400RPM stall will be able to launch higher from a stop, and therefore come off the line quicker provided it has traction. I believe stall speed also affects the slippage of the converter, so from a roll the 4400RPM converter will be able to keep the engine in the powerband by allowing slippage.

BlackHawk T/A

iTrader: (3)

Yes, and it wont let the RPMs fall as far as the 3000 after an upshift.

CRZYPWR

Yes.. because when I put my stall in ( yank 4400 ) and started to drive my car... I noticed ( no **** who wouldnt ) that this really slips a lot, and I was wondering if I am loosing speed in of the roll races against A4 cars with lower stalls not even talking about built M6 cars. Car hits crazy off the line.. but I still love to do some racing from higher speeds. Yes the only match for this stall was cam with over .600 lift. Car is still not finished yet but I am already excited and trying to get some info on that.
Im still learning and every time i put something in my car.. I want to know as much as I can. So stock LS1 motor on 4400 is really not going anywhere ( I know because I tried ). Whenver I got on it the rpm would just go to 5500-6000rpm and just hang in there all the time... and the car would keep accelerating.. slowly. I know that was overkill for my motor. Can You just explain it to me why was it happening ? I have an idea why but I want detailed answer.
Thanks fellas

BlackHawk T/A

iTrader: (3)

Too high, slipping right past your powerband. Like when you put a 3600+ into a stock LT1...

98_Formula

iTrader: (15)

whats the highest good stall for a stock-cammed ls1? (with d/r's)

Pimpium57

iTrader: (104)

IMO, 4000 for a bolt-on car.

s346k

iTrader: (4)

yes, the 4k+ stall might "slip past the power band" of a stock cammed car. but look at the difference in ET. it's a no-brainer, ALMOST regardless of your setup, the higher stalled car will post the better times.

even from a roll, take a 3000 vs a 4400. the 4400 stalled car will walk away, hands down.

how do i know this? i have a 4k stall and performed MANY "field tests"..

98_Formula

iTrader: (15)

^^ thats what i thought, i wanna get like a 4000 - 4400 stall for my car becuz i plan on goin with a g5x4 or a MS3 in the future (hopefully within a year) and then once i learn to drive that, add some spray. i just wanna make sure i get a stall that i will work with my future application, but i dont wanna be suffering in the mean time.

calongo_SS

iTrader: (7)

The fastest stock internal cars are running 5k stalls. From a roll the higher stall should be faster as well.

2002_Z28_Six_Speed

iTrader: (19)

Unless you are running a really expensive and fast rig I wouldn't be interested in looking at a loss of MPH when you see how much quicker you are getting there.

CRZYPWR

I gotta go to the track and see what ill run before my cam is in. I got yank Pro Thruster 4400 245mm 2.5 STR. Cost me $1000 bucks when I bought it.
I got one question. See when my trans whas done I never tuned anything. I remember there was one problem with it. When I punched it... sometimes the trans would kick back to neutral. Any idea why was that happening. And over time.. it just went away. I dont know.. Like I said I know 4400 is a overkill for stock cam car but when I get on it... it freaking revs that hell out of it and its not going anywhere ( on higher speeds 50 - 70 mph). I just have the feeling that something is wrong with this trans. I hope that cam and good Dyno tunning will get my car to run like dream again.

98_Formula

iTrader: (15)

^^ i'm not sure on this but from what i hear, ur supposed to get a tune to either delete all or some/most of your torque management when u get a big stall, and i think i remember that is because the computer thinks ur tranny is goin when the stall slips, so maybe thats whats goin with ur tranny...

2002_Z28_Six_Speed

iTrader: (19)

You are correct. You need to turn up the max allowed slip.
Engineers are just trying to protect the car for how it was setup from the factory.

SUX2BU

iTrader: (14)

You ever run a 5100 stalled car from a roll?
And thats with the stock cam. yes this stall is too big for a stock cam. the ideal stall would be about a 4400 i think. But i bought this stall for cam only. Just can't wait to throw a Tyrannosaurus in it.

UL LOSE

Everyone says a 4400 is too big for spray though. So if youre gonna have a MS3 and spray,youll want nothing bigger than a 3600 and 4.10s from what i hear

1 BLOWN V8

iTrader: (17)

Here is another question.

Lets say we have 2 cars that are exact with all the bolt ons plus cam and heads.
One car has a 3,000 to 3,200 stall and the other has a 4,200 to 4,400 stall. With the extra slipping and extra heat from the bigger stall would it kill the life on the trans compared to a smaller stall?

UL LOSE

not as long as you have a cooler,which you should have on any car with a stall