Im looking into getting a larger stall coverter, going from stock to a 3000 rpm.
Have fresh engine with RMT, looking for better launch.
Have 5.7L auto 3:45 gears posi, any opinions?

 

What heads and cam do you have that you think you need a 3k stall?

 

Stock 5.7 with some head work, running 4 psi boost at the moment.
Thanks for the response, just researching and looking for feedback.
Im thinking 3K is too much as well.

 

i dont think a 3000 stall is a good street convertor,but you will need to give a lot more info for anyone to help, power band based on cam selection,heads and intake.i run a 2200 stall with a decent 350,and have been very happy

 

I would stick with around a 2200-2500 stall with a close to stock l98 with some boost.

 

Please tell why I would love to know your thought process on this.

 

you want to select a convertor based on your combo,to much stall and the car will run like a pig,and be mushy feeling with everything less than full throttle-a stock or mild built engine can be "happy"with a moderate increase in stall,but too much is worse than not enough-if your cam starts making power at 2800 rpm,and your engine is built accordingly,then go with 3000 stall,provided the car is geared properly for it-if your like most guys and your power band is starting more like 1500-1800,then you will be much better off with the lower stall speed-i dont have the words to explain all the technical asspects,but have had many hot rods over 20 plus years,and i hate to see someone make a mistake(to much stall)that i have done in the past-hope that helps

 

my thought being if the car and combonation are built for that type of stall its fine,but a lot of guys over stall a car,just like a lot will over cam or over carburate a car-just my 2 cents,no harm meant

 

I know the way a stall works you made it sound like 3k stall wasnt good on the street period.

 

i ran a 4500 stall behind a big block mopar that was a lot more strip than street,and because the car was built for it,it was fine-sorry i should have been a little more clear!

 

Vigilante converters. Im going to be installinga 2800 stall converter soon of thiers. Nothing but good things about them. I may be slighty overstalled, but I guess i'll find out for sure.

 

For street/strip use, you want a stall that's about 500 rpm into the powerband. For full race, you want a stall that's about 1000 rpm into the powerband.

Having too high a stall speed is just as bad as having one too low.

The factory TPI system really starts running out of air by 5000 rpm so it isn't a good choice for a high rpm engine.

As mentioned above, converter stall depends on a lot on the rest of the components used. When doing an engine build, converter stall is the last thing to be done. For a 3000 stall converter, you're going to need a camshaft with a minimum of 272 advertised duration and no more that 278.

If you want a ballpark guess at the required stall speed, give all the cam specs. The camshaft will usually determine where the best stall speed will give the best performance. If intake, heads, gearing etc don't match then they need to be changed to optimize the camshaft and converter stall.

My full race converter stalls at 6200 rpm. I shift at 7400 and the rpms drop to 6400 after the shift. That's the range where I make the most power. I can still drive around the pits at a moderate rpm but wouldn't want to try driving on the street.

 

If this is a stock cam, TPI car I would shoot for 2600 stall. Vigilante or Yank if you have the cash for it. Midwest makes a cheaper piece I've seen people use with success. Edge, PTC are worth checking out also.

I drive a 4500 Vigilante and love it. Also owned a 4200 Vig. 3000 and 5000 stall fuddle. Vigilante makes a nice piece but my next purchase will be a Yank.