and thinking about going to a 9" from a 8" and dropping from 5700 rpm stall to 5000 rpm stall, this will be custom made for my combo, my question is has anyone gone from a 8" to a 9" and what were your result's even if you changed stall speed, and what is the real advantage of one size over the other.

I had a 9" in that went to 4600 when I ran my best. I now have an 8" in that goes to 5600 and I'm running a couple .1's slower.


I need to get my 9" redone

Bill, have you called any of the major converter companies and asked them to spec a converter for "your car and combo"? You can also call them and let them know your combo and converter you have now and maybe they can rework that one to match your combo and make it better


Russ

Was that for me or him Russ?

It was for Bill.

Bill Hart.........your converter may be a little on the loose side
but, I'll bet, not much. It might need something done to it, to
get a little more top-end efficiency though.

i believe the t.a. j convertor is 9" they work fine.

Coan doesn't seem to be a popular choice around this forum, but they have excellent customer service. And IMO the best converters I have ever run..They will answer plenty of questions about a converter even if you didn't buy it. The keep a history of every converter, and can pull up the info on a custom converter like it was called in yesterday on a converter built back 6 years ago..They did so im My case.
My cars in back to back test always pickup/ MPH better than other popular converters recommended on here

ATI would be my recommendation

Many of the big names use great parts and the converters are very similar and all done very well.

ATI probably has the most stock/super stock type wins. BTE is probably the fastest growing in the past ten years. Coan has always been a staple and I wouldnt hesitate to run one again.

Us as racers get way too caught up in the "size" of the converter. There is so much more than the size of the converter and its relation to what it does in our cars. A 9 inch that stalls at 5k is going to have different characteristics than an 8 inch that stall at 5k. Stator, fin angle all come into play and directly effect the stall and more importantly the top end efficiency.

Personally in a bracket car I like my converter a little on the loose side. I will loose some ET but gain a bunch of consistency.

I would call around and speak to every company you want to, and see which one speaks to you the best and you form the best working relationship with. Keep them and continue to use them unless you have a reason not to. Personally I have been going with BTE for the past 8 years or so, I like how I am treated, I like what they have done for sportsman bracket racing and I like the people running and building the converters. Are they the best? Depends on what you define best with........

Your converter is (IMO) the single most important piece of the puzzle to make all cars perform their best.

I was introduced to Lenny's craftwork through Chuck Lofgren who built my race trans. We have them in both cars now. A friend of mine choose Ultimate for his 8 sec Challenger and he's sold a few ford converters to some of his customers as he's had nothing but good experiences with the product.

what I have done is talked to a guy here fairly local about building me a new one, he told me that a 9" is way cheeper than a 8" because of the internal componet's cost and also the availability of a useable 8" core, and he guaranteed that he can make a 9" work just as well as or better than a 8" at almost twice the initial cost, from what I have been told by him and a number of his customer's is that he hasn't had a dissatisfied customer yet, and will strive to maintain that reputation, he does not advertise and has built a customer base by word of mouth alone.

Kilbuck?

I just had my PTC rebuilt completly for 300 readj my stall for 5300 to 6500 thing looks brand new for 300.00 hard to beat

When your done calling the rest call the "best"..Ultimate converters..203-874-2100..Lenny is the "man" when it comes to converters,he worked for Dynamic back when they were really good,not so good since he left i'm told...