I'm doing a build up on my RX-7. I've always loved my RX-7. Bought it new in 1987 and couldn't part with it. Alas it has some 150K miles on the motor and it's about done.

So, I'm building a new motor for for 1999 Twin Turbo Trans Am. Strictly drag car at this point. It came with a T-56 6-speed which I'm replacing with a Turbo 400 transmission.

So! I have a spare 6-speed and a spare LS1 motor. It has heads and cam and pushes over 400 RWHP through a 12-bolt on the dyno. It also doesn't weigh much more than the stock rotory motor.

I think it would be a fun project. I'd like to turn this into a roadrace car. We rent Road America every year and my TA just isn't gonna cut it anymore with the pure drag mentality I'm throwing into it.

I have some questions about what I'm attempting.
1. Will the stock rear end hold? I've got some guys around here with 400+ HP on their Rotaries and they seem to be fine.
2. Will the LS1 motor completely throw the handling off on the car? I love the handling it has stock!
3. Should I just rebuild the stock rotory and build that up instead? What's the cost these days for something like that?

Thanks in advance,
Charlie

 

www.v8rx7.com and http://www.torquecentral.com/vb225/f...?s=&forumid=11

Theres lots of good info there. Espesially the forum.

 

There is a member on this forum that could be of help to you. jimlab is his name.

 

your a monster!

 

www.thewrongmotor.com

 

Almost everyone on here will tell you to rebuild the original engine. I also say that you should stick with the original engine. There is alot you can do to make it alot faster, basically as fast as you want with a TII(or as fast as you can afford).