Torque Converter Preference

I second or maybe third this statement, I believe my convertor is as responsible for my car doing well as anything I have done. Coan was the way to go for me and I am amazed how little stall you notice when cruising. Mine is the max performance and stalls around 3,600.

:TU:


Steve

 

pretty small cam like maybe 5 deg overlap @.050 and 3.55 gears on 26 inch tire car currently runs 12.81 @ 106 in the 1/4 on stock stall. 1.80 60 foot

 

great Thread ...... hats off too ya

 

I tried pumping the pole up for the SP .I've had a SP 400 long shaft in my sporty for 8 troublefree years and thousands of smilesnow.
OH, thats 4500 lbs of musclecare:Brow:

 

Where do you get these SP converters? Who is best to deal with?

 

The cores are getting harder and harder to find i'm told

 

I'm sorry, I have to disagree with some of you guys. My fixed stall converter with lock-up is the only way to go for me. You gain the consistency of fixed stall on the track and the mileage and comfort of low cruising RPMs while on the interstate.:TU: I do realize my combo is relatively mild compared to others, but why would you want a low stall mode when you could lock it up completely.

 

Low stall is great for cruising around town. You dont have to deal with the slippage from stop and go stuff. With the high stall and lock up you still have to deal with it crusing around town.

 

You can't drive a dry trans with no torque converter. My S/P 400 complete was 215 lb on the bathroom scale. No reliability problems here. But some of the old wiring or controls need replacement or upgrade.

I like the extra reliability, performance & economy of a S/P on a heavy street car. An electronic control maximizes the benefit. It doesn't have so much to offer for racing.

I have some info on S/P transmissions on PHOTOBUCKET, couple of ALBUMS. Bruce Roe

http://s93.photobucket.com/albums/l71/bcroe/

(that is a lower case "L"71, not an upper case "i"71)

click on an Album
click on a picture to enlarge + description

 

I prefer Lockup convertors, as in 700-R4 and 4L80E (my choice for high power) or even 200-4R (not my choice of trans). They are much more efficient than even a switch pitch.

 

I must say though, that a switch pitch left on low stall (or even a stock convertor) cruising around town feels more powerfull (and pulls the tires on some cars) than a high stall convertor because it is more efficient from a roll at low stall. A lockup won't work until your speed is higher.

 

2800 Circle D here. 1.6 60' times with 364 cubic inches on 3700 lbs. Drives pretty tight around town for a stall converter.