Thinking of switching to a 3 speed?

Hey guys,
Looking for your opinion on what kind of performance gain there could be by switching my lencodrive from a 2spd. to a 3spd.? I was thinking that over this winter I could add a section to the transmission and gear it as a 3spd. Would this show any kind of measurable performance gain? This is being run in a 150" blown altered with a keith black olds motor and big chief heads. The blower is a 14-71 hh psi roots. Any opinions would be helpful.
Thanks,
Eric

 

We switched from a 2 speed to a 3 speed in a dragster and saw about a tenth and a half pick up. I know the rpm's don't drop of near as much at the shift points and the car charged harder through the middle with the 3 speed.

 

Is the three speed as consistent as the two speed run to run?

 

3 speed gives one more chance to strike the tires, so consistency could be affected by that. JT, curious as to what trans and rear gearing you ran in 2 spd vs 3 spd config.

 

I knew a guy with a blown alcohol altered who really wished he'd gotten a three speed Lencodrive instead of two.

 

Eric,
If you aren't close to overdriving the tires and its bogging the motor a bit more than you like (like it feels a little lazy for the power you're making), a 3 speed would definitely help. Anything you can do to keep the motor up where it's making power longer will always result in quicker and faster runs.

 

It was a Lencodrive with a 1.68 low gear. Now I have a 1.64 low with 1.28 second gear that keeps the motor up in the power band. I don't remember how far the rpm's dropped at the shift with the 2 speed, but they only drop to around 6600 with the 3 speed at the shift. I shift the car at 8100.

 

hey guys, thanks for the input. I think the 3 speed would def. help my cause. After more research though and looking at the cost to convert it, I have thought about just selling the 2 speed lencodrive and switch it over to a 3 speed with a clutch.

 

Clutch

i know where a good 2 disc, 9 stand clutch is probably get it pretty reasonable if you act right and quit causing so much trouble
talk to you later redneck
don

 

eric what do you want for your 2 speed? thanks Dave

 

Donald you know that i can't stay out of trouble, this whole racing business is nothing but trouble!

Dave,
Haven't really thought about how much I would want for it, if your interested feel free to give me a call though and we can discuss.

Eric
815-545-5418