RX-7 Turbo II with LS1 Motor in it?
#1
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RX-7 Turbo II with LS1 Motor in it?
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
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
#2
mad scientist
www.v8rx7.com and http://www.torquecentral.com/vb225/f...?s=&forumid=11
Theres lots of good info there. Espesially the forum.
Theres lots of good info there. Espesially the forum.
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Join Date: Jul 2001
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#6
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).