Converter's Physical Size
 

Im in the process of swapping a 4l80e in my supra. I was told to go for a 9.5 inch converter rather than a 10.5, anyone have an idea as to why? I assume that a 10.5 will hurt my ET? Im opting on buying the pro series yank 5 lockup converter, supposedly good for 1200whp. Have a 3.73 rear end, opting for a tight converter something like a 3200 converter.

I have been searching for a PI converter as I heard they make a 9,5 inch verter with 5 disc lockup, but it seems i have to call them ? What is the price of the 9,5 inch unit from PI?

well thanks guys, hope to get some clarification.

If you would post some specs on your motor, turbo, and a dyno sheet, I could probably point you in the right direction. Converter diameter is a crucial factor in overall converter selection. Too big, you won't build any boost and have a turd, and too little, you don't build boost and blow through with excessive converter slip.

On a different note, we love doing custom converters, and can surely build one to suit your needs and power level WHATEVER it may be.

-Brian

Basically, the smaller the converter, the less fluid has to be pumped through it. Less fluid means less drag on the converter internals, which allows it to stall at higher speeds.

typically the higher the stall speed of the converter you want, the smaller the converter gets

s366 turbo, about 800 whp (cant have a dyno sheet if im barely installing this transmisison lol), factory 3 Liter engine, weight about 3100 lbs, 3.73 rear end,
I dont want a very loose converter.

And thanks for that explanation soundengineer, very helpful, i was under the impression that a bigger converter would generally cause more load and thus spool up my turbo much faster. Can't i use a big converter with some spray to get it to reach the powerband?


well let me know what you guys think, maybe i truly need a 9.5

I actually think neither of those options will work for you. I would vote 258mm 10 1/4 inch. What kind of adapter are you using to bolt the converter up?

-Brian

im using ATF's th400 billet adapter and flexplate

so im assuming i can use a full GM converter?

what would the price be on one of those brian?

Looks to be the case. It seems to be fairly straight forward. Definitely going to be a fun ride.

-Brian

what would the price be on one of those converters brian? pm or email? thanks

yea , im using paddle shifters on the car and also a quicksilver shifter with a tci control box, gona be a blast !

PM sent subeone.

-Brian

Sorry I'm late to the party.

I agree with Brian, a 258mm is a great turbo converter, for several reasons!