i have a 4000 and blew through it last night on a 150 shot but not on a 100 shot.motor makes around 410 rwhp.what size converter do u recommend?

 

I would go with a 3400... I'm curious, what str does your current stall have? Because if it's something high like 2.5 or more, you could probably get away with a 3600 and a lower str.

 

its a vigilante converter and jack from precision says they are all made the same no matter the stall speed so he recommended 1 step down wich is around a 500 rpm difference. he said since the 100 shot was fine and only blew through the 150 only go 1 step down .

 

Well, he's right on the money with what I think as far as size. I don't have any experience with Vigilante... so they only use one str?