More torque converter questions!
Thread Starter
Burning Brakes
Joined: Mar 2003
Posts: 915
Likes: 1
From: UK
More torque converter questions!
Damn I feel guilty posting yet ANOTHER thread on T/C's... must be the most :smash: to death topic on the forum!
Anyway, I feel a little better now I've fessed-up my guilty conscience :blueangel:
Right, here goes:
I know a higher-stall converter will give me a harder launch, BUT is there any benefit from a roll? For example, if you're manually shifted to 2nd and gun it, will a 3000-stall converter provide more thrust up to 3,000rpm than stock? From roll-on races, I can only really see any benefit in 2nd-gear... any other gear and the tranny will downshift anyway.
Can anyone chime-in with a PT2400 or 2800 (or Y3000)? What's your car like from a roll (compared to stock)?
Also, would I be inviting the Grim Reaper to take my trans by installing a T/C (other mods in sig)? Car has 27k miles and is a daily driver. I don't have the money to pay for a tranny rebuild! The car will not be raced (except for a few ET's) and is driven moderately hard on the street.
Want more performance... I want that real slam-you-back-in-the-seat feel... wanna make my passenger involuntarily curse when I floor it! :D
Tell me what I need!
Thanks guys 'n' gals :flag
Anyway, I feel a little better now I've fessed-up my guilty conscience :blueangel:
Right, here goes:
I know a higher-stall converter will give me a harder launch, BUT is there any benefit from a roll? For example, if you're manually shifted to 2nd and gun it, will a 3000-stall converter provide more thrust up to 3,000rpm than stock? From roll-on races, I can only really see any benefit in 2nd-gear... any other gear and the tranny will downshift anyway.
Can anyone chime-in with a PT2400 or 2800 (or Y3000)? What's your car like from a roll (compared to stock)?
Also, would I be inviting the Grim Reaper to take my trans by installing a T/C (other mods in sig)? Car has 27k miles and is a daily driver. I don't have the money to pay for a tranny rebuild! The car will not be raced (except for a few ET's) and is driven moderately hard on the street.
Want more performance... I want that real slam-you-back-in-the-seat feel... wanna make my passenger involuntarily curse when I floor it! :D
Tell me what I need!
Thanks guys 'n' gals :flag
Melting Slicks
Joined: Jun 2001
Posts: 2,743
Likes: 3
From: Davie Florida
Re: More torque converter questions! (i_york)
I have had the PT2400 and it does not help much from a roll, but it does give you alot of grunt out of the hole. If you want a dynomite combo from a roll the Yank SY3500 and 3.73 gears will be hard to beat. With this combo you will no longer have any dead spots when you floor the go pedal. :yesnod: How long your tranny will last depends on how you drive your car and how well you maintain it, install a tranny cooler and change your fluid often and the A4 tranny can last a long time if you don't constantly beat on it. :cheers:
Le Mans Master
Joined: Jan 2003
Posts: 6,427
Likes: 0
From: houston texas
Re: More torque converter questions! (Mitch C)
i just installed a yank st3500 and 3.42's. coming from stock t/c and 2.73's this will give you what you want. my driving habits are alot like yours and i also don't have x-tra cash for new tranny. its hits really hard out of the gates and from a roll its a beast from 20mph to 40mph to 120mph. try this combo you will not be disappointed. :yesnod:
Pro
Joined: Feb 2003
Posts: 644
Likes: 10
From: st. cloud mn
Re: More torque converter questions! (i_york)
I went with a 3.73 and kept the tc stock for now. I may regret not doing it all together due to cost but car definitly takes off a lot different than it did with the 3.15's. I also went Z06 sized pilot sports and I believe they hook up better than the run flats. I will have to ride in a fellow members car to see if the launch everyone talks about is worth the extra wear and tear on the tranny. Just my .02
Burning Brakes
Joined: Apr 2003
Posts: 908
Likes: 4
From: TROY MI
Re: More torque converter questions! (i_york)
I have 3.73 gears with the stock TC. The car is traction limited from a 20mph roll with the stock EMT tires.It pulls realy strong in all gears with no "dead spots".
Thread Starter
Burning Brakes
Joined: Mar 2003
Posts: 915
Likes: 1
From: UK
Re: More torque converter questions! (yankeevetteconvert)
I have 3.73 gears with the stock TC. The car is traction limited from a 20mph roll with the stock EMT tires.It pulls realy strong in all gears with no "dead spots".
Ideally, I would like a LITTLE stronger launch (maybe 2400rpm stall?) and a nice increase in acceleration from a roll. However, I believe torque multiplication (over stock) only occurs below stall speed. For instance, if I had a SY3500 and floored the car from a 10mph roll in 2nd-gear, the converter would flash to 3,500rpm and hold it there until my road speed forced the revs higher. Obviously, this would improve my roll-on acceleration because the converter is transferring more torque from the engine to the rear wheels. However, with a smaller converter (like a PT2400), it wouldn't take long for the revs to rise beyond the stall speed, so torque multiplication would be short-lived and acceleration from a roll would be similar to stock.
Am I making sense? I know, I want my cake and wanna eat it too :smash:
[Modified by i_york, 9:08 AM 5/14/2003]
Safety Car
Joined: Aug 2000
Posts: 4,154
Likes: 1
From: Murphy TX
Cruise-In II Veteran
Re: More torque converter questions! (i_york)
Being traction-limited is my main concern when considering a T/C. I'm running Dunlop SP9000 street tyres (daily driver) and my launch is pretty much on the limit of available traction as it is with the stock T/C. I see no point in upgrading the T/C if I can't transfer the newfound increase in RWTQ to the road.
[Modified by ToplessTexan, 7:59 AM 5/14/2003]
Safety Car
Joined: Aug 2000
Posts: 4,154
Likes: 1
From: Murphy TX
Cruise-In II Veteran
Re: More torque converter questions! (i_york)
However, I believe torque multiplication (over stock) only occurs below stall speed
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Verdad Gallardo
Race Director
Joined: Aug 2001
Posts: 17,901
Likes: 18
From: Elko, Nevada
Re: More torque converter questions! (ToplessTexan)
I'm running the SY3500 and 3.42's(plus TransGo) and from a
30mph roll, the car just absoute scoots. Less than 30 and I
will get some wheel spin. Not as much now that I'm running the
GY GS-D3's instead of RF's From 60mph...it's the same thing.
My car is not a daily driver and sees the track every now and then.
:cheers:
30mph roll, the car just absoute scoots. Less than 30 and I
will get some wheel spin. Not as much now that I'm running the
GY GS-D3's instead of RF's From 60mph...it's the same thing.
My car is not a daily driver and sees the track every now and then.
:cheers:
Burning Brakes
Joined: Apr 2003
Posts: 908
Likes: 4
From: TROY MI
Re: More torque converter questions! (ToplessTexan)
My car is a daily driver also.I have no problem with the gears and they are a ton of fun. My point was if you have stock tires and you want max acceleration from a 20 mph role you are traction limited with a 3.73 gear.You are geting 3.06*3.73 = 11.4 torque multiplication just from the gears.
