Which torque converter should I use??

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Aug 21, 2003 | 10:32 PM

Crickett

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Racer

Joined: Mar 2003

Posts: 288

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From: Roanoke VA

Which torque converter should I use??

My question is what stall speed should I put in the car. I'm puttin in a Fastburn 385 in my 76. Its got an TH350 with 3.08s in the rear.

Thanks in advance.

Aug 21, 2003 | 11:35 PM

Marc80

Racer

Joined: Jan 2003

Posts: 296

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From: Sarasota FL

Re: Which torque converter should I use?? (Crickett)

Quote:

385/TH350 with 3.08s in the rear.

I am 425 with same gears and like my TCI Breakaway. Mine is anti-balooning for NOS but I won't use it that way.

The stock converter was terrible it wanted to tug the car off the line and I had to continually shift into neutral at lights. This one is acceptable and plenty of torque off the line without slipping around noticably.

I would not go with a lower stall speed from what little I know, but you should talk to the tech's. they reccommended this based on cam specs and other factors.

[Modified by Marc80, 11:38 PM 8/21/2003]

Aug 22, 2003 | 10:27 AM

Glutamine83

Racer

Joined: Dec 2002

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Re: Which torque converter should I use?? (Marc80)

i have a 355 with a big cam and I run a 2400 stall, which seems to have decent driveability/performance

i would really like a 2800-3000 stall :seeya

Aug 22, 2003 | 01:28 PM

dath

Burning Brakes

Joined: Jul 2000

Posts: 1,162

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From: Beaverton, OR

Re: Which torque converter should I use?? (Glutamine83)

Quote:

i have a 355 with a big cam and I run a 2400 stall, which seems to have decent driveability/performance

i would really like a 2800-3000 stall :seeya

I've also got a 2400 stall, but I don't know how it works yet as I haven't driven my car since installing it... :rolleyes: I had my converter custom made by Torco for a very reasonable rate and it *SHOULD* be better than an off the shelf converter as it's only 9.5 inches. Smaller is better:D I think they cut the stators on the higher stall speed converters with larger cases, which produces a less efficient converter. I've also got an antiballoon plate and the converter is made from billet steel. I do plan on using nitrous or I wouldn't have bothered with the antiballoon myself. Also, with a 2400 and stock tire sizes, you will be very marginal with the 3.08 rear on the highway. Really you shouldn't go any higher unless it's a drag only car, which with 3.08 I'm sure it's not... You'll want to run a transmission cooler as well, or at least every company I called recommended it and my TH400 book recommends it for nearly any car in any setup...

[Modified by dath, 12:29 PM 8/22/2003]

Aug 22, 2003 | 05:29 PM

Jack71

Drifting

Joined: Sep 2001

Posts: 1,427

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From: Boxford Mass

Re: Which torque converter should I use?? (dath)

2400 too.

I assume its a street car, going higher would hurt driveability. Bigger convertors are for use with bigger cams & gearing in performance applications.

Plus, that Fastburn motor is probably making decent power at 2200- 2400.

[Modified by Jack71, 5:30 PM 8/22/2003]

Aug 22, 2003 | 10:53 PM

Nomad78SA

Drifting

Joined: Feb 2000

Posts: 1,607

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From: Clarksville,Tn,USA TN

Re: Which torque converter should I use?? (Jack71)

I went with a 1800 stall in my 78 with a stroked 388ci motor and 700R4 overdrive transmission with a lock up converter. I have 3:55 gears in the back...With the amount of torque I will be making, I believe it will stall around 2100 rpms anyway which is dead in my torque power band. I should enjoy it when I finish the vette and get it on the road.....
Neil in Tenn

[Modified by Nomad78SA, 9:54 PM 8/22/2003]

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