Need help with HP torque converters.
Thread Starter
Le Mans Master
Joined: Jun 2004
Posts: 7,155
Likes: 154
From: The Arid Sunny Desert
Need help with HP torque converters.
I just had the FAST 90mm intake & 90mm TB installed, Kooks headers along with 3.90's in the rear. I'm currently running a relatively small 2400 stall Pro-Torque converter. What is the difference in the 2400, 2900 on up to 3500 converter. I know that as the stall speed increases so does slippage or the amount of RPM's necessary to launch the car goes up with the stall.
My car is driven 99% of the time on the street and 1% on the track. Before these mods the car ran like a stock C5 until you punch it then it went like mad. With the new mods just completed, can I stay with the 2400 converter? What would be the pros & cons. I'd like a fast light to light vette. Thanks
My car is driven 99% of the time on the street and 1% on the track. Before these mods the car ran like a stock C5 until you punch it then it went like mad. With the new mods just completed, can I stay with the 2400 converter? What would be the pros & cons. I'd like a fast light to light vette. Thanks
Racer
Joined: Jan 2004
Posts: 306
Likes: 1
From: Hartland Wisconsin
I finally got to drive my car lastnight. added 3.90's, PT4000 stall, vararam, LG headers. Boy the car is scary. The 4000 stall is hard to get use to. This isn't my daily driver. I can't give you any ideas on which converter to go with. But have fun and good luck.
JEFF
JEFF
Race Director
Joined: Oct 1999
Posts: 17,710
Likes: 1,219
From: Phila PA, Bonita Springs FL
Well, I'm selling one, but I'd be making this post even if I wasn't.
You're definitely under converted with those 3.90's.....
The answer is the 98% efficient, 2.5 STR & tight, SS3600 by Yank..
Its their newest converter, and is excellent for street/strip....
Will give the the hard launch & acceleration you desire, without being loose at all!
http://www.converter.cc/super_stock.htm
You're definitely under converted with those 3.90's.....
The answer is the 98% efficient, 2.5 STR & tight, SS3600 by Yank..
Its their newest converter, and is excellent for street/strip....
Will give the the hard launch & acceleration you desire, without being loose at all!
http://www.converter.cc/super_stock.htm
Last edited by YO-EL; Sep 12, 2004 at 02:06 PM.
Thread Starter
Le Mans Master
Joined: Jun 2004
Posts: 7,155
Likes: 154
From: The Arid Sunny Desert
You're definitely under converted with those 3.90's.....
I don't have any idea what that means. People run stock converters with 3.90's so I would need a better explanation.
I don't have any idea what that means. People run stock converters with 3.90's so I would need a better explanation.
Race Director
Joined: Oct 1999
Posts: 17,710
Likes: 1,219
From: Phila PA, Bonita Springs FL
Under converted means you have too much gearing and not enough stall to take advantage of the torque to the wheels & acceleration you should be having.
Yes guys can use a stock converter with 3.90 gears, but, give them a tight 3500+ converter, and they will tell you their head pulls back when they hit the gas & their car flys!!!
Trust me, you got 3.90 gears, get at least a 3500 stall with a minimum 2.5 STR. (torque multiplication)
Yes guys can use a stock converter with 3.90 gears, but, give them a tight 3500+ converter, and they will tell you their head pulls back when they hit the gas & their car flys!!!
Trust me, you got 3.90 gears, get at least a 3500 stall with a minimum 2.5 STR. (torque multiplication)
Safety Car
Joined: Aug 2000
Posts: 4,154
Likes: 1
From: Murphy TX
Cruise-In II Veteran
When you say track, are you talking about auto-x or drag strip? For autocross, I'd stick with a lower stall converter in order to maintain more precise throttle control. For the drag strip bigger is nice and the converter Ellis suggested would be a good choice. OTOH, if you want a street racer the low STR Super Yanks are a better option.
If your car is all buttoned up now, I'd suggest driving it for a while and getting a feel for what you like or don't like about it now. That'll help you figure out what, if anything, you're looking for from your converter.
If your car is all buttoned up now, I'd suggest driving it for a while and getting a feel for what you like or don't like about it now. That'll help you figure out what, if anything, you're looking for from your converter.
Le Mans Master
Joined: Aug 2000
Posts: 5,294
Likes: 2
From: Suffolk, Long Island NY
I agree with El, the SS3600 would be a great choice for you. Yank's SS series have a real tight feel to them. Thier SS4000 feels as tight as my SY3500 did. So the 3600 should feel like a average 3000-3200 stall. IMO, I could use my SS4000/3.73 combo for a daily driver, so the SS3200/3.90 combo wouldn't be a problem at all. When are you going to the Doctor's next, I'll try to stop by and I'll let you try my combo.
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Thread Starter
Le Mans Master
Joined: Jun 2004
Posts: 7,155
Likes: 154
From: The Arid Sunny Desert
Should be picking her up Friday afternoon from the Docs. Car is not auto-xed but I would rather have a Viper beater from light to light. How much would 1/4 mile times decrease with a Yank 3500 compared to my PT 2400? Like Topless Texan said, I'd rather have a street racer type setup.