I was wondering where i could find the distancing between motor mounts on both the 20b and 13b-rew. Trying to figure out how much modification will be needed to drop either 1 in my gen1. I have a profesional welder as a father so any metal work is not a problem. Can be done, i just need a little help on specs. i do understand the problems with converting to powersteering and wiring harness conflicts. Which leads me to my next ? where can i get a wiring harness for either 1.

 

if you think wiring and power steering are gonna be conflicts, you have a LOT to learn.Start searching....

anyways, a 13b is about 3/4" longer than a 12A , and dont even consider a 20b unless you got a lot of knowledge and about 10k (running it stock) and about 15k+ for doing is with a single

 

well thanks for the encourgament but my dad has the knowledge and i got the $$$ and i want o have sumin that no1 else has.

 

I wasnt meaning to discourage you, I think thats great but you will have to realize that most if not all JSPEC 20b's will need to be rebuilt. Thats gonna be $3k +, ecu that controls it $2k, the motor itself is $4k. All the fab work that you will have to do, plus the thousands you will have to spend on misc parts. Oh I almost forgot the ignition system, what are you gonna use there? Theres a wealth of info on here, good luck on your project. I think I might be a little low on the final price, it will be somewhere around 20k, with a good ecu and tuning. Which I dont think anyone in Va is able to tune... Trust me I know this stuff first hand, I have a car sitting here with 14k in it, and it kicks *** but isnt nearly tuned as nicely as it could be. I havent been able to find anyone local (and thats within 1000 miles) thats capable and has good experience with tuning one You have 2 things against you here a rotary and a stand alone. I think only a new haltech ecu will control a 20b After you get done with the motor, you will have to get a rear end capable of taking punishment, not mention a nice gear box. I dont think a T2 tranny will take a 20b.. Unless you run it twins then why bother? Also I forgot to mention a 13b-rew is fine but why not a 13b-re? Same motor without the price, the intake ports on the -re are bigger, the TB is bigger etc,not to mention the price is cheaper if you go with a 13b... Then again its not a 'drop in' as you said...

 

The 13BRE will probably need a rebuild as well. They have smaller exhaust ports than a 13BREW, so it;s a good idea to deal with them during a rebuild.

I got lucky with my 20B. There, that's my final warning to you.

 

Well, I was able to get 370 rwhp on my "stock port", non rebuilt, JDM 13B-RE block.

And that was with a carb, and only 17 psi, on plain jane 93 octane.

 

i still would love a 20b first gen but i think i might go with a cosmo in my 83 who could i contact to get the turbo kits for them. thx

(sry im a n00b still with my 7s)

 

Well, a cosmo is a car that came with both the 13B-REW and the 20B in the 90's. The earlier 60's and 70's models came with a 12A engine I think. The earliest ones mabey even came with a 10A engine. But I'm not sure. I just know for sure that the 90's cosmo came with the 13B-REW stock and the 20B was an option.

We know your a noob and we are here to help you out. You just have a lot to learn about the engines. 20B is the ultimate, but VERY, VERY expensive. 13B-REW is second to the 20B, and with enough mods has the same capability as the 20B. The 13B-RE is not a bad engine. Actually, its one of the most common swaps in a first gen because there is very little custom work needed. There is still some, but not as much as most engine swaps. You could go with a 4 port 13B with a holley carb and TII turbo to get a respectable HP numbers. Another option is the same setup on your current 12A. But basically, if you can think of it, its probably been done.

Well, actually one thing that hasn't been done is to swap a 10A engine into a 7. I don't see much point in it, but it would be interesting to see. They are very hard to come across though.

 

rew is a rx-7 motor, re is a cosmo motor.

 

kit? you arent gonna find a kit that just bolts an IC in your car, gives you all the plumbing and bolts to the motor with every fitting needed. You will have to fabricate everything, and piece together what you need.

However and turbo and turbo manifold combo thats sold for a 13b, will bolt to the motor. Just be careful with clearances next to the cosmo's lower intake , it hangs out just a little there..

try www.horsepowerinabox.com