Converter Slippage at top end

[Mark Yacavone]

Originally Posted by Dan Fahey

Currently using a 10 inch Yank 4400PT Locking converter.
Calculated a 12% slip based on Wallace Racing Calculator


Dan

Not sure why you included this info, but if you're going to use a T200 and an 8" converter, there are plenty of people here who can figure what gear you'll need. You won't have to figure a thing.
Only question would be: Will you have enough steam to run a second under, or are you just looking to run the index?

[ss3011]

Originally Posted by Mark Yacavone

Not sure why you included this info, but if you're going to use a T200 and an 8" converter, there are plenty of people here who can figure what gear you'll need. You won't have to figure a thing.
Only question would be: Will you have enough steam to run a second under, or are you just looking to run the index?

Hopefully Mark will back me up on this , since he has a lot of converter experience . A 10" converter is an odd choice in stock . Example , To make a big converter stall up at 5000 rpm will trade efficiency and make it slip a high percentage through the traps It is much better to have a 8" converter configured to stall at 5000 rpm , and gain back the overall efficiency through the traps . A bonus of the smaller converter is the coupling point of the converter (the point that converter multiplication goes to 1 ) will be at a higher rpm . A big converter will get to 1 to 1 at a lower rpm , so the car will not accelerate as quickly while the converter gets through this in-efficient part of the converter curve .

[Dan Fahey]

Originally Posted by Mark Yacavone

Not sure why you included this info, but if you're going to use a T200 and an 8" converter, there are plenty of people here who can figure what gear you'll need. You won't have to figure a thing.
Only question would be: Will you have enough steam to run a second under, or are you just looking to run the index?

Staying with 4L60E..
If it breaks PerformaBuilt will rebuild.
Far less expensive than a built Th200-r4 and much stronger.
Don’t have to make a new Cross member or Size a new drive shaft.
More first gear for weight of car
8 inch Converter is being built.

[Mark Yacavone]

Originally Posted by Dan Fahey

Staying with 4L60E..
If it breaks PerformaBuilt will rebuild.
Far less expensive than a built Th200-r4 and much stronger.
Don’t have to make a new Cross member or Size a new drive shaft.
More first gear for weight of car
8 inch Converter is being built.

So you're using an o/d - lock up trans, but not using either ?
Gearing it tight in 3rd for a big duration Stocker cam?
Oh.