PTC 10" 3200 converter vs. PTC 9.5" 3200 stall?

[Steve]

I am getting ready to order a new converter and I am planning to get a PTC but I have a few questions. My car is a full weight 87 GN with a 250" 109 with Champion irons and a 212/212 roller. The turbo is a TA-66 p trim with a Garret .63 housing(I run a local heads up class that requires a stock appearing turbo) with the usual supporting parts. With the extra cubic inches and the small garret housing and based prior experience I think a 3200 stall should work well. I have had a good number of 10 second turbo Buicks but in the past I have used multi-disc Vigilante converters because that was the way to go in the past. This time I plan to go with a non lock converter since many are having good luck with them and streetability is very important to me. I will be drivng the car a few thousand miles on the Hot Rod Power Tour this summer so heat is a concern and I want the trans to stay as cool as possible. Would I be better off with a 10" or 9.5" converter? I have heard some pretty amazing slip % numbers on the 9.5 PTC converters so would a 10" be comparable? Would the 10" be more highway friendly? Thanks for the info!

 

[John Wilde]

Get the 9.5 inch you will over power the 10 inch big time.

 

[bison]

The 9.5" will work better everywhere and you will need it with those parts. The 9.5 isn't sold by stall speed either.

 

[qws2000]

I have the same turbo and p trim.. The guy who did the tranny said 9.5 ptc was the way to go.

 

[gnloyalty8777]

9.5 all the way steve

 

[quickt]

10" is POS stick with the 9.5

 

[Dusty Bradford]

With that much motor you will need the 9.5. I had several guys using these on the drag week last year without issues.