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Bionicdodge.Com  |  Bionic Tech  |  3.7/4.7/5.7/6.1/6.4 Hemi (Moderators: hemifever, adamsredlines, Richie)  |  Topic: How do you pick stall speed? 0 Members and 1 Guest are viewing this topic. « previous next »
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adamsredlines
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« on: September 25, 2007, 02:42:51 PM »

What factors go into determining the amount of stall in a torque converter?

There's a group buy going for some and I'd like to join in but have no idea what stall to request.
One guy suggested a 2600 but I dont know what he based it off of...

If its based off of mods, I've got 4.56's, HO manifold, ported throttle body, headers, CAI, dual exhaust, and for now 206 cams but might be switching to 212x's around Xmas, and also I'll be getting ported heads and the SCT tune when it comes out.
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« Reply #1 on: September 25, 2007, 02:58:23 PM »

I don’t think one particular stall speed is going to be right for everybody.  More torque will cause a given stall speed to stall higher.  It seems most trans guys recommend lower stall speeds than for instance KRC Performance.  However, I doubt most trans guys test as much as KRC.  For instance, with my combination, Marty recommended a 3300 stall. APS recommended a 2400 stall and said a 2800 would be too high. I compromised and bought a 2800 stall because the price was considerable less than a 3300 stall.  When my truck is running well, it is a jack rabbit out of the hole.  However, I still wish I had gone with the 3300 stall.  I think it would put me further into the power band.

APS has a pretty good description of the different stall definitions and terminology: http://www.apsprecision.com/TQConverter.html

It looks like you have or are going to get a KRC cam.  I would call Marty and ask what stall he recommends for your combination.
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1998 Dakota  R/T CC; 408 Stroker; Comp 220/230, SCT; Ported Eddy’s; M1; HiPoTek 53.6 mm TB; MP Headers; Single 3 1/2" Exhaust; Transgo; PATC 2800; Motive 4.56; Auburn LSD; Hotchkis TVS - 2/3 Drop; Sidewinder Customs 13" Viper Brakes; HiPoTek X-Brace, Driveshaft Loops, Engine Torque Strap, and Differential Cover.



Thank you for looking, Richard
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« Reply #2 on: September 25, 2007, 03:02:58 PM »

Yeah I've currently got 206's and might switch up to the 212x's sometime...still undecided, but I'm pretty set on a torque converter. 
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« Reply #3 on: September 25, 2007, 03:08:30 PM »

Torque convertors do make a difference if the stall is right.
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1998 Dakota  R/T CC; 408 Stroker; Comp 220/230, SCT; Ported Eddy’s; M1; HiPoTek 53.6 mm TB; MP Headers; Single 3 1/2" Exhaust; Transgo; PATC 2800; Motive 4.56; Auburn LSD; Hotchkis TVS - 2/3 Drop; Sidewinder Customs 13" Viper Brakes; HiPoTek X-Brace, Driveshaft Loops, Engine Torque Strap, and Differential Cover.



Thank you for looking, Richard
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« Reply #4 on: September 26, 2007, 12:21:27 AM »

It also depends on how much of a racer you are. Are you trying to get every little ounce out of your vehicle at the track? Generally you want a stall that will get you off the line and at an rpm that is a good power range for your engine. You look at the cubes, the cam, gear, etc and if the combo will be making power at 3500 then come off the line at 3500 rpms.  You also want to figure out how often you're at the track vs. general day to day driving. A 2600 rpm stall is a good day to day stall.  Once you get to the 3200 to 3600 stalls, that's an aggressive street vehicle with good track response.  Above that is pretty much track oriented.
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adamsredlines
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« Reply #5 on: September 26, 2007, 01:25:40 AM »

I want something streetable for sure, but definately want gains at the track...

Maybe something inbetween?
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« Reply #6 on: September 26, 2007, 01:27:58 PM »

Shoot for a 2800 to 3000.
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« Reply #7 on: September 26, 2007, 01:45:31 PM »

I appreciate the help.

I sent them a list of my mods, we'll see what he suggests and I'll go from there.

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« Reply #8 on: September 27, 2007, 02:20:05 PM »

Full size Rams need 3000 lock ups especially with smaller ci's. I run a fully streetable 3600 in my Ram. Locks back up at 1000 rpm cruising slow.
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« Reply #9 on: September 29, 2007, 01:00:27 PM »

ditto to marty, we put the Viper 4000stall full lockup in my truck and that thing drives like a DREAM part throttle, even better in wet conditions than my wife's Rumble Bee!!

I drove 120mi a day in it going from Daytona to Cocoa when I worked with Marty
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Bionicdodge.Com  |  Bionic Tech  |  3.7/4.7/5.7/6.1/6.4 Hemi (Moderators: hemifever, adamsredlines, Richie)  |  Topic: How do you pick stall speed? « previous next »
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