I have a #4 Vig that's going in for a re-stall.Vig tells me that each time you move up in pumps it gives you about a 400 RPM difference in stall,but they also said they could increase or decrease stall by 200 RPM for any given pump.So my question is;
I'm looking at either a #0 pump or a #6 pump for my restall.Is there any advantage or disadvantage to going between the two pumps? Should I have them put the #0 pump in but bump the stall speed up the 200RPM they're talking about?
My thinking is that I could get the efficiency of the #0 pump & close to the stall speed of the #6 pump,kind of a best of both converters thing.
I know this all has to do with pump & stator combos,& will change efficiency & STR when they do this,I just don't have the pump/stator info to tell me exactly what changes this will actually make as far as STR,efficiency,& stall speed are concerned.WAAAYYY back someone had all the pump/stator combos.I'm thinking it was RAGTOP99 or Patrick G. Can either one of you or anybody else tell me how they get the extra stall & an opinion on whether doing that is a good thing or a bad thing

 

I believe Colonel has what your looking for <img src="gr_eek2.gif" border="0">

I'll try from memory, until some one with the exact numbers chimes in (the STR's are off a little, but the stall should be real close)....

0 pump rated 2800...actual: 3200 stall, 1.9 STR
6 pump rates 3200...actual: 3800 stall, 2.1 STR

It all depends what stall your looking for. You should be able to go from 3000-4000 with the different pump stator combos available. I don't think it would be a great idea to go over 3800 with a VIG, as the combo becomes less efficient over a Yank. I use a tight #4 also (supposedly stalls at 2400) it stalls to 3500 plus in my car with my weight and torque. I'm probably moving up to a "0" pump after a bigger heads are installed. I should get 3800-4000 with mine!

"Aftica" what is your shift extension after going in to 3rd? Mine hovers at 4700 rpm after a 6400 shift.


Jimbob
<img src="graemlins/camaro.gif" border="0" alt="[Chevrolet]" />

[ February 26, 2002: Message edited by: jimbob ]</p>

 

Patrick G has the specific pump/stator combos. My recollection was they kept the stator constant and changed the pump when they do a restall.

 

Jimbob- 3500 stall from a #4 Vig <img src="gr_eek2.gif" border="0"> WOW That's alot of torque !! 2 to 3 shift extension for me is about 4300-4400 with a ~6000 shift point.If you make the tranny shift at full pressure I've seen it go as low as 4000,but that's a whole subject all by itself.

Ragtop -- I also thought they kept the stator constant & just changed the pumps,but how would they get the 200 RPM increase or decrease they're talking about for any given pump number ?

Looking forward to Colonel's or Patrick G's info on the pump/stator combos.

 

Well, actually I'm a different story all together....Stroker LT1 car
Yep, my pressure is cranked through LT1 Edit and I have all the high volume tricks in the valve body + all the standard upgraded parts. This is the only way this tranny would hold through the racing season. Of course the 3800lbs race weight doesn't help it either. <img src="graemlins/gr_guns.gif" border="0" alt="[guns]" />

Jimbob