torque convertor

Ed Carpenter · 08-06-2011, 01:47 PM

Posting this for my step dad. He just bought a dragster hopes to run 8.90 class with it. My question is the torque converter is a 5000 stall. It has a transbrake. What rpm should he be leaving at off the tb to make the tc work properly. I'm a stick guy so that's why I'm asking here. Thanks. Ed

Ron Finney · 08-06-2011, 05:53 PM

He needs to leave on the convertor.....stage it and matt it. Most guys in S/C are running 5600 to 6000 convertors...and leave on the convertor....although yours should be fine....doesn't take much to make a dragster go 8.90...but you do need to be on it to hit the .400 pro tree. I have a 5800 stall and I chip mine 5600....just to take a little load off the convertor....

Good Luck!

Ron
396V S/C

Bob Verwold · 08-06-2011, 05:58 PM

I have a 5200 stall and leave at 4700 but it's a 3040 lb door car on a .500 tree. Don't know if that helps or not....

Mark Yacavone · 08-06-2011, 07:55 PM

Ed, If he can leave on the limiter, it's easier on the converter , but you've got to be able to go red first. Delay boxes are legal over there..

Bill Baer · 08-09-2011, 01:22 PM

If it is a 5000 converter mat it and let if fly! (Oh and put your head back first!

don R · 10-06-2011, 11:57 PM

Our car hit harder chipped a few hundred rpm down from stall. Flashed the converter. See it it will go red on the pro tree with no delay. Watch the front wheels to see if they are rolling through the beams or wheelieing up out of the beam. Up is quicker but less repeatable.

08-06-2011, 01:47 PM	#1
Ed Carpenter Live Reporter Join Date: May 2006 Location: Dripping Springs, Tx Posts: 2,701 Likes: 185 Liked 509 Times in 128 Posts	torque convertor Posting this for my step dad. He just bought a dragster hopes to run 8.90 class with it. My question is the torque converter is a 5000 stall. It has a transbrake. What rpm should he be leaving at off the tb to make the tc work properly. I'm a stick guy so that's why I'm asking here. Thanks. Ed __________________ Ed Carpenter 2005 Chevy Cobalt A/SM Race Engine Development

08-06-2011, 05:53 PM	#2
Ron Finney Member Join Date: Jul 2008 Location: Greenwood, IN Posts: 168 Likes: 0 Liked 0 Times in 0 Posts	Re: torque convertor He needs to leave on the convertor.....stage it and matt it. Most guys in S/C are running 5600 to 6000 convertors...and leave on the convertor....although yours should be fine....doesn't take much to make a dragster go 8.90...but you do need to be on it to hit the .400 pro tree. I have a 5800 stall and I chip mine 5600....just to take a little load off the convertor.... Good Luck! Ron 396V S/C __________________ Ron Finney 396V S/C

08-06-2011, 05:58 PM	#3
Bob Verwold Senior Member Join Date: Jul 2007 Location: Fayetteville Ohio Posts: 656 Likes: 0 Liked 0 Times in 0 Posts	Re: torque convertor I have a 5200 stall and leave at 4700 but it's a 3040 lb door car on a .500 tree. Don't know if that helps or not....

08-06-2011, 07:55 PM	#4
Mark Yacavone Veteran Member Join Date: Mar 2002 Location: Miles From Nowhere Posts: 7,635 Likes: 2,747 Liked 4,805 Times in 1,828 Posts	Re: torque convertor Ed, If he can leave on the limiter, it's easier on the converter , but you've got to be able to go red first. Delay boxes are legal over there.. __________________ Real life never quite adds up.... Jay Farrar

08-09-2011, 01:22 PM	#5
Bill Baer Senior Member Join Date: Jul 2007 Location: Nothern IL Posts: 596 Likes: 1 Liked 1 Time in 1 Post	Re: torque convertor If it is a 5000 converter mat it and let if fly! (Oh and put your head back first! __________________ Bill Baer 3391 SC, 339B SC, QR

10-06-2011, 11:57 PM	#6
don R Member Join Date: Dec 2005 Location: Illinois Posts: 109 Likes: 0 Liked 0 Times in 0 Posts	Re: torque convertor Our car hit harder chipped a few hundred rpm down from stall. Flashed the converter. See it it will go red on the pro tree with no delay. Watch the front wheels to see if they are rolling through the beams or wheelieing up out of the beam. Up is quicker but less repeatable.