hey

im looking into doing a 20btt conversion into an rx7 series 2/3. i know most things that have to be done and its going to be very expensive. but i was just wondering if anyone here has done this conversion or know of some one who has. i want to know if its worth it? any major problems with the conversion? does the extra weight affect handling? or do you think i should just spend the money on a 13bt?

thanks for replys

Dylan

 

It can be done and has been done. Matt the Hitman down in Australia has a custom three rotor setup in his 1st gen, plus if you do some searched here, I think you will find a couple more.

Now to facts: - As much as I love the 1st Gen, it cannot handle ridiculous power. There are plenty of 13B Turbo 1st gens over here that go sideways in 4th under boost. Traction and safety is a serious concern under those conditions. This is why I have chosen to go 13BT myself. When I develop enough power, I will be putting in a roll cage, and a Mariah Mode one wide-body kit to handle extra thick rubber for traction.

 

I agree saftey should be the first thing people should work on when doing a engine upgrade.

I'm in the process of getting a 20b for my '85 GSL. I will be upgrading the brake system, body strenght(roll cage, sway bars, etc...), wide body kit to handle larger tires, etc...

A car with that a lot power isn't any good if you slam it into a wall now is it?

 

one cool alternative to a wide body kit would be a shortened rear axle with 10 inch wide tires and a custom suspension.

 

Otherwise known as "tubbing"

 

Oh come on, my little 12A would make the car go sideways in 4th gear... sometimes from a roll... Okay, that's in the rain, but still, when it rains 75% of the time...

BTW the '85, the one that will not exceed 83mph, got sideways the other day. Shifting into 3rd gear. While going downhill. Maybe I'm running out of fuel volume at the top end, 'cos it certainly has enough power down low.

Anyway, the reason why I read this.... There is no such thing as a 20btt. It's a 20B-REW.

 

The same thing happened to me. My 85 topped out at ~82mph but still had great power through 1st and 2nd. So I put in my carter pump and I topped out at like 101mph. Much better but still not where it should be. I think my catylitic converter is pooping out on me.
Back to the subject, don't you need to cut into the firewall just to fit a 20B in a first gen? You would probably need a giant radiator too.

 

Dude I know what you mean. On the way to school there's 3 stop signs, and they're all in a 35mph zone so I always accelerate to 40 real fast from each one, 'cause I hate having to wait behind school buses on that road that have to pick kids up. And the kids take forever to go from their front door to the damn bus!

But anyway, The other day it was raining pretty hard and I accidently put it at 4k rpms at one of those stop signs, and the *** end started to slide out into the other lane! I had to stop completely to regain control 'cause there were cars coming. And then a little later down that same road I was making a right-hand turn, and I was like, "I'm gonna have some fun." So I had it in 2nd and i took the corner and went hard on the gas... And then *** end came out again. That was fun ****.

But it's done it when it's not raining too.

 

No, there's no need to cut the firewall as there's actually plenty of room in the first gen engine bay if you move the radiator forward.

And yes, you need a very effective cooling system system to handle the 20B.

All in all it amounts to something like sticking a square peg in a round hole but it can be done.

 

I avoid driving 1st gen's with LSD in rain with bridgeports in them. Not even fun,... dangerous

 

Hell, even without bridgeports they're dangerous!

 

power is nothing without control- pirelli

you get'm peejay, lol. 20btt, baa. you need to change your thing from the bo jackson to technical junky. (ducks and runs...)

seriously that is a lot of doh and completely transformance of your car. you are talking $$$ for the setup and $$$$$$ in other upgrades to keep the car balanced (go, stop, turn).not to mention a very long down time and a ton of tylenol. it would be a scary fun car in the end though. just make sure this is the best platform for what you want and is it going to turn out to become what you want.

 

Doesn't that all seem a little excessive? It seems to me like you should just get a third gen for the price you will have to pay to make it anything special