Str vs stall please explain.
Str vs stall please explain. ok currently im in the market for a new stall and want to pick the right one(i already have a midwest 3k with 2.0str). I do know what str is/does as well as stall, the question i have is more of a tech question. Lastly im trying to get a good converter that doesnt hit the tires hard... on know for the question
IF A CONVERTER RATED AT 3K WITH 2.O STR SPINS THE TIRES WOULD A 3,500 STALL WITH 2.0 HIT THE TIRES HARDER,LESS,OR ABOUT THE SAME. This question is arived cause when im suggested a new converter its always a 3,500 with a 2.5str.. I CLEARLY SAID TO THEM I DIDNT WANT TO HIT THE TIRES HARD AS IM ON DR'S AND DONT WANT TO SPIN. So why do people(and companies) keep suggesting i get something with a higher str than what i already have if i told them i have traction issues with the midwest already.
edit-- this is basically an str question, i was suggested several other stall ratings but always with high str, wouldnt a high str regardless of stall cause me to spin more than a lower str.
IF A CONVERTER RATED AT 3K WITH 2.O STR SPINS THE TIRES WOULD A 3,500 STALL WITH 2.0 HIT THE TIRES HARDER,LESS,OR ABOUT THE SAME. This question is arived cause when im suggested a new converter its always a 3,500 with a 2.5str.. I CLEARLY SAID TO THEM I DIDNT WANT TO HIT THE TIRES HARD AS IM ON DR'S AND DONT WANT TO SPIN. So why do people(and companies) keep suggesting i get something with a higher str than what i already have if i told them i have traction issues with the midwest already.
edit-- this is basically an str question, i was suggested several other stall ratings but always with high str, wouldnt a high str regardless of stall cause me to spin more than a lower str.
Last edited by BubaGumpShrimp; May 5, 2005 at 02:22 PM.
sounds like you want a super yank 3500. go search this forum or yank ---->
its a convertor that hits soft for drag radials. or you could just modulate the go pedal. my 4000 convertor with a 2.6 str hits hard but i can just modulate the pedal to hook hard on radials. just practice. most people dont want a low str convertor.
its a convertor that hits soft for drag radials. or you could just modulate the go pedal. my 4000 convertor with a 2.6 str hits hard but i can just modulate the pedal to hook hard on radials. just practice. most people dont want a low str convertor.
11 Second Club
Joined: Feb 2003
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From: The South
Are you getting a new converter just to hit softer? If you practice you can learn to launch it well, just don't slam it straight to WOT. Agree that SY3500 sounds like it's for you. It has an essentially stock STR with 3500 stall speed.
the SY 3500 is a 1.63 STR and they work great on the street as with a high STR converter when you spin the tires your STR goes to ZERO as soon as the tires spin and will not come back so no STR in First gear!
with the SY 3500 you do not spin or spin very little this makes the car faster on the street as the STR is still there working for you!
but at the track with proper tractoin the higher str will 60 faster
with the SY 3500 you do not spin or spin very little this makes the car faster on the street as the STR is still there working for you!
but at the track with proper tractoin the higher str will 60 faster
yes i know about str, how it works and how it can lower the 60' times. Let me try to re-ask my question in a different way. If i were to change my converter from a 3,000 stall 2.0 str to a 4,000 stall what would the new converter str have to be to equal the old converter. Would the str still have the same effect no mater what stall i get. I do know that if you increase the str when you increse the stall the converter feals tighter, which leads me to think that if i keep the same str(2.0) but increase the stall speed it will be easier to launch and not spin due to the extra slipping of the converter which would let me better controll the throttle and not spin...
11 Second Club
Joined: Feb 2003
Posts: 5,524
Likes: 1
From: The South
If you increase the stall speed and not the STR it will be harder to stick if you give it lots of throttle. The available torque to be mulitplied is greater at higher engine speeds, where the engine makes more power.
you need to know the converter you are to use as diff co.'s use diff ways to rate the STR at YANK we rate the stall and STR to the type of use and our converters for LS-1 will be rated at the STR where the converter works best for launch, our SY3500 is rated at 1.63 that is at 3500 RPM
pt 4000 is rated at 2.2 that is at 3000 rpm
the ss 4000 is rated at 2.8 at 3200 rpm
but other co.s rate theirs at the point of converter flash
as the STR is NOT Constant thru the RPM range
the converter might have a STR of 2.0 at 2000 and 1.9 at 3000 and 1.6 at 3800
or another one 1.8 at 2000 2.0 at 3000 and 2.3 at 3500 all in the same converter
so what you are asking is very hard to Guess
general rule is
200 fts lbs at 2000 rpm with STR or 2.0 will give you 400 fts at trans
and 250 fts at 3000 with STR of 1.60 will get 400 ftlbs and the feel will be the same at launch but the converter with the longer lasting STR drop-off will go faster in the 60 foot
pt 4000 is rated at 2.2 that is at 3000 rpm
the ss 4000 is rated at 2.8 at 3200 rpm
but other co.s rate theirs at the point of converter flash
as the STR is NOT Constant thru the RPM range
the converter might have a STR of 2.0 at 2000 and 1.9 at 3000 and 1.6 at 3800
or another one 1.8 at 2000 2.0 at 3000 and 2.3 at 3500 all in the same converter
so what you are asking is very hard to Guess
general rule is
200 fts lbs at 2000 rpm with STR or 2.0 will give you 400 fts at trans
and 250 fts at 3000 with STR of 1.60 will get 400 ftlbs and the feel will be the same at launch but the converter with the longer lasting STR drop-off will go faster in the 60 foot
Last edited by Yank; May 6, 2005 at 09:26 AM.
