hey everyone, well i am currently looking into pruchasing a 93 Rx7 twin turbo model. the car has about 60k miles on it runs but smokes. My guess is the apex seals are done, so im looking at swapping the motors. not looking to do anything crazy just yet.

my question is which motor would be best for a daily driver weekend drifter with some power.

13b re cosmos
13b twin turbo
20b ?

im still trying to learn about these motor and the specs. i wanna keep the car twin turbo for the most part just for the uniguness.

there are other options i can do like the 2jz, rb26dett, vg35dett, or even ls1 but not sure i wanna do those yet thus why i thought of keeping it all mazda for now. just trying to figure out which motor to replace the old one with?

thanks i advance for your help

 

The smoke is probably from the turbos. The best motor for a DD and weekend drifter is going to be another 13B REW.

Here is a link to the 3rd gen FAQ thread. you'll find buying guides, info about mods and other good stuff in this link. Spend some time reading it.
https://www.rx7club.com/3rd-generation-specific-1993-2002-16/faq-3rd-gen-other-useful-links-68640/

 

I suggest you start with a compression test. No point in tearing anything apart if you don't know what is wrong.

Don't do a 13b cosmo, it's less powerful than a stock engine. Don't do a 20B, it's a very difficult process and very expensive. Just mod a stock engine well and you'll come out way ahead.

Dave

 

^this

 

i hear the secondary turbos go out frequently on the rew.

 

No, they don't really. People do have some issues keeping the solenoids and stuff working perfectly though.

 

is the smoke oil or coolant? either could be getting into the combustion chamber resulting in the need for a rebuild. if the apex seals r gone it would run very poorly, if at all. get ur post count up so u can visit the 3rd gen section.

 

the smoke is white i havent got it to run completely yet just finished flushing and replacing the fuel lines and system since the car has been sitting since january 01

 

whats is needed to fit the ls1 into the rx7? my friend is now telling me if i am willing to but the parts and everything need he will give me his spare ls1 motor. its got 5k mile and a spun bearing.
so after i might out what i need and price everything maybe ill be getting that instead

 

ls1 complete mount kit will cost you around $2300,plus you gotta do the harness its not as easy as it is said, its not a drop in and go

 

If your considering doing a ls1 swap i would recommend heading over to http://www.v8rx7forum.com/index.php and reading up on it there. Imo you can build a very reliable rotary for the cost of doing the swap. Some parts may need to be fabricated and even with an extra set of hands it will take some time to do.

 

white smoke is definitely coolant so that would mean a rebuild.

 

well i wanted to keep it rotary but since my friend is offering to give me an ls1 motor i figured i would look in to that still not set tho

thats what i assumed

 

im pretty much finished a supercharged 1jz swap (except the wiring which i dnt have a clue so im stuck) and its pretty tight in there, bonnet doesnt close at all! rekon an ls1 is def a better option, i just couldnt afford one in the uk!

 

Ditch the 13b, makes an amazing car grief and you will end up hating it, unless your loaded!

 

loads and loads and loads of info on ls1's at the v8 forums! Good luck.

 

i didnt not reliezed you said supercharged until i quoted it. do you have any pics i would like to see that set up! i heard the 1jz are a lil wider than the 2jz thus why it doesnt fit as well

i heard the 13b are the afordable motors the 20b are the ones that will cost tons.

yea if i decided that motor i got alot of reseach to do.


still have deside on which motor to go with yet im think i just might rebuild the twin turbo 13b in the car so i can drive it until i figure out what motor i wanna go with. maybe ii build a 4 rotor motor like scoot rx7 has

 

Just go single turbo with the 13b...

 

if u gonna spend money on other that rotary engine swap,i would just rebuild yours,you can get alot of power out of the rotary with a real good tune,ill be less of a head ache

 

I say check your compression, ditch the stock Twin turbos and go Single. If your willing to spend some cash.....build the motor!!