torque converter choice.

[KENGELS]

I am getting ready to upgrade to a full DTT trans set up.

I am going for max power for drag racing but still want decent driveability for in town driveing and some light towing.



I am leaning toward a 91% converter but most people seem to like the 89% more. Any comments would be apreciated,see sig for mods.



Thanks.

 

[rjones]

Originally posted by ol Blue

I am getting ready to upgrade to a full DTT trans set up.

I am going for max power for drag racing but still want decent driveability for in town driveing and some light towing.



I am leaning toward a 91% converter but most people seem to like the 89% more. Any comments would be apreciated,see sig for mods.



Thanks. [/QU



I would suggest just calling Bill or Stephan they would have the best answer for you.

 

[Ben Rumson]

Ditto... call Bill or Stephen.

I just got a full trans with the 91% and love it. There's so much that can be done to custom tune it to your exact HP and intended use that you really shoudl give Bill a call. Shift points, pressures, soft vs smooth shifting, etc, etc.



Getting our opinions is only superficial. Bill can help you far more than we could.



Good luck.

 

[KENGELS]

Ben, what mods do you have? I have talked to Bill but was hoping to hear opinions from people who have bought his torque converters and the advantages/disatvantages of the 91%vs89% converters at different HP levels.



Thanks.





ol Blue

 

[Ben Rumson]

My signature...

I'll include my signature with this.



Bill said that if I were to tow anything heavy (which I have done and still plan to do), I would need to have around 230 hp to sufficiently run the 91% converter. An 89% TC would probably require less hp. They are both considered "low stall" converters and are WORLDS better than stock.



I can't see your signature, so I'm not sure what hp you're putting out now. If you're stock 215 hp, you could advance your timming to around 15. 5 and do some internal pump mods to increase your hp a bit and you probably wouldn't have to buy any other upgrades.



I was running stock 160 hp and couldn't reach the 230 sufficiently with internal mods... so I went for broke and upgraded my Delivery Valves, Injectors, Exhaust, and Intake Filter.



91% will pull your engine down (sounds and feels great) a little more when idling than the 89%. 91% + a heavy load AND not enough HP, you could stall the engine. 89% has less of a tendency to stumble at launch or stall the engine than the 91% but won't take high HP and very heavy loads quite as well as the 91. There's the trade off. Note: I have virtually no stumble with my set up.



I wanted something that would tow hard, but didn't want any stumble at launch. 91% for towing vs 89% for less chance of stumble... . humm???? I debated this heavily for several weeks.



Called Bill. He said that given my anticipated HP with the upgrades AND my intended towing, that he wouldn't sell me the 89%. It needed to be a 91% to perform and last as needed for what I would be using it for. He did however, soften the setting somewhat so that it would respond a little more like the 89%, but still have the tighter fluid coupling of the 91%. I'm actually glad I have the tighter converter and more power transfer to the ground.



I'm not sure what adj's he did to "soften" the 91 a little (definition was probably over my head). I also had him include the 2nd gear band strut and an additional setting in case I ever added an engine break. I also had him narrow the shift points from 3rd to 4th so that there isn't such a long jump between them. I'm EXTREMELY happy with the way it shifts up and down and either empty or when towing. All aspects are MUCH more enhanced over stock. I can actually feel it downshifting and holding back when slowing down - something that was almost non-existent when stock.



If your not towing much, you might be happier with the 89. I'm very happy with my 91 - both towing and empty. Sucker lays it down!!!



PM me if more ? Glad to help. Send me your phone number and I'll call you.



- Ben

 

[Jim Fulmer]

DTT

Just depends on what your doing with it, I love my 89 it helps with lag(16 cm) and on the road it allows say a 200 RPM flash when it's unlocked and spools like NOW. If you haven't driven one of these trucks your going to laugh you a$$ off the next time you hear a stock transmission going through the gears. The low RPM, light throttle shifts and truck movement is too real and will spoil you to death. Couple that with a good installer, Then with Bill and the folks at DTT... . How can you go wrong.



Jim

 

[Ben Rumson]

and...

You'll have a hard time wiping the smile off your face - especially when you come to a hill. :-laf



Honest! I've almost laughed out loud at how well it handles the hills. It's as exciting to drive as my '76 Camero.

 

[Strick-9]

I pull very heavy loads of various construction equipment. 25k+ on a weekly basis. I prefer the 89% converter for pulling 3 to 1.



Out of the hole it's tons better than the 91% that I had for over a year. It has smoother shifting while accelerating.

Once they lock up, they're all the same.



This testing was done with 350-400 HP.



My opinion,

Chris