Torque converter question

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Torque converter question

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Torque converter question - 6/27/2008 5:03:07 PM

kyphur

Posts: 268
Joined: 10/31/2007
From: Birmingham, AL now Raleigh, NC
Status: offline

So when I bought my camaro I could''ve sworn that the guy said it had a 2200 or 2300 stall in it. I thought this would be more than enough for the engine rebuild I just went through but I''m thinking my torque converter is a stock converter. I don''t know the stall on the stock converter but I feel as if I''m not transferring the power from my engine to the wheels and I have a kinda slow launch. I can still spin the tires but not very well. I''m not trying too hard either since the engine still needs to be broken in fully and I don''t want to glaze the cylinders early before the rings seat. I talked to a couple of people at different manufacturers and they''re saying 2400 - 2800 stall.

My question is does running a lower stall hurt the engine? I had heard that the wrong torque converter can strain the engine and tranny but I don''t know if it''s a higher or lower rated converter that does this when I heard it.

_____________________________

kyph
http://www.kyphurland.com

1974 Type LT Z28
Rebuilt 350ci L82 and th400 trans
All matching numbers

Post #: 1

RE: Torque converter question - 6/27/2008 5:28:56 PM

robmnrd

Posts: 259
Joined: 11/3/2007
Status: offline

Too high or too low, both are bad. And if it''s stock it should be around 1600-1800. Or that''s what I was told. ;)

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'93 z28

(in reply to kyphur)

Post #: 2

RE: Torque converter question - 6/27/2008 8:27:09 PM

kyphur

Posts: 268
Joined: 10/31/2007
From: Birmingham, AL now Raleigh, NC
Status: offline

Yeah, transmissions are a mystery to me. I was hoping to hear that "lower is o.k. just won''t give you any good performance...".

So what exactly can it do to an engine/transmission running a lower stall than what the engine is rated for?

_____________________________

kyph
http://www.kyphurland.com

1974 Type LT Z28
Rebuilt 350ci L82 and th400 trans
All matching numbers

(in reply to robmnrd)

Post #: 3

RE: Torque converter question - 6/27/2008 9:10:12 PM

Camaro 69

Posts: 1161
Joined: 10/17/2007
Status: offline

OK here you go....Lower is o.k. just won''t give you any good performance. You answered your own question, now you can sleep well tonight!
Generally, stock converters start to grab at idle or slightly above. Have you ever sat and idled the engine, let the foot off the brakes and the car starts to creep? That''s normal, and it doesn''t damage the engine.
A higher stall is for performance purposes only, not to save the engine from getting hurt. The idea is to raise the engine''s rpm''s more so that it gets into the optimum h.p./torque band before the converter hooks.

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Eats Rice and Poops Out Fords
393 Stroker, Tunnel Ram/Dual Quads, and a well used rear-view mirror

(in reply to kyphur)

Post #: 4

RE: Torque converter question - 6/28/2008 6:11:51 AM

kyphur

Posts: 268
Joined: 10/31/2007
From: Birmingham, AL now Raleigh, NC
Status: offline

Camaro 69> O.K. Cool, that''s what I thought it was but I wasn''t 100% sure. I thought maybe the lower stall tried to hold the engine down and the torque it produces (even at idle) would be held by the torque converter and thus hurting the engine even at low range RPM. Like the engine makes around 275-325 ft lbs of torque at around idle and the torque converter doesn''t handle it and slows the engine down and this hurts the engine by making it slow down against its will.

Thanks again guys!

_____________________________

kyph
http://www.kyphurland.com

1974 Type LT Z28
Rebuilt 350ci L82 and th400 trans
All matching numbers

(in reply to Camaro 69)

Post #: 5