13B-RE or 13BT?
 

Ok Im deciding on an engine for my car and have narrowed it down between these two. I know the RE has larger intake ports but smaller exhaust ports than an REW but I dunno how they compare to the T2 13BT. Basically what it comes down to is I can get the RE for around 1500 with a T2 tranny and the 13BT for around 1000 with tranny. Im planning on single turbo half bridge no matter which one I get but I want to know if the RE is worth the extra 500 bucks?

PS I did do a search.

The BT has smaller intake ports than the RE or REW. So to make the same power as the RE's u would have to port it. Both motors are good motors, but the REW would make more power off the bat.

So if I port them it doesnt really matter which one I start with?

Crap wrong screen name this is DELTA_Rotary

If u port it it wouldn't matter really. The RE series also has better flowing intake manifolds and comes w/ a twin sequential turbo setup. The BT series is a single turbo. The BT makes about 180-200 stock and the RE series is about 250.

with a half bridge, the difference in low end of hte motors in stock form would be negligable. also, a larger hot side on the turbo tends to be a bit more friendly.

also, the t2 irons tend to crap out around the 400hp range. so, if you know youre going to go for large hp numbers, save yourself some trouble right now, and get the RE or REW engine. i plan on running about 350 daily (not racing all the time), but keep it around 400 or so max (so i dont constantly max out the turbo if i do push it. just over-shooting to keep the life of the turbo).

Wow back from the dead. I'd say higher than 400hp. I know BDoty311 has his AE at 408rwhp and its a daily driver. He's had no problems with the irons.

well thats good. hopefully the case is the same with my engine. now i dont feel so pretentious about the power i seek anymore.

i've seen upper 400's from stock s4 irons, and over 500 (not on my car though...i wish) from pinned s4's.

Well that makes my decision a bit easier, but wouldn't the RE be a more difficult engine to work on--considering it starts as a twin turbo?

not if your going single turbo. also the 13bts ports cannot be ported out as large as the RE's. The size of the runner going to the actual port is so much smaller, and it cant physically be made as large as the re's. But 400 is possible and not dificult with an s4, even easier w/ an s5. Not really easier, but they seem to put down more power before irons crack and what not.

would an REW fit in an s4?

yea, but it's a real pain in the ass...

i personally just bought an 13BRE motor over the 13BT and the 13BREW for a few reasons:

1. the 13BRE was quite cheaper than the REW, and only a hundred more than the 13BT (i got mine for $950, 13BT was $850, and the REW was $2300ish)

2. RE has more potential than the other two. the RE has the best of both worlds, the intechangability of all the internal parts with the 13BT (with the exception of the ousings and rotors) and the higher compression rotors from the REW (they are intercahnagble). not to mention the HUGE intake ports that dwarf both the 13BT and the REW ports. yes the exhaust ports need to be changed out, but that's not hard at all. you can get two bad 13BT housings and use those sleves.

3. originality. this may not be a big deal to some people, but i like being different. the 13BRE was an easy choice for me since very few people have actualy done the swap.

4. simplicity. with the exception of the 13BT the RE is much simper to install into an FC. all you really need is the motor mount adaptors and your more than halfway done. you abiously need the FC drivetrain components too.

on the flip side, getting parts for the RE is a pain in the ass. i've ended up making many gaskets, and if i ruin one of the housings i can only hope i can find a good price on a used one.

it's really up to your preferences. if you want a cheap, easy, and quick install with mininal customization get the 13BT. you can make decent power out of the 13BT, but you'll end up spending more on mods this way. If you don't mid putting a bit more time and money into it, get the 13BRE. you'll spend more on the motor, but you won't have to spend as much for mods later. if you really like spending money and customizing, get the REW. mods for the REW are in the same ballpark as the RE, but mounting the motor will be a bitch.

re ports aren't that big. what i like about them is the runner is HUGE and it tapers, accelerating the incoming charge. as i understand, it's good for the low-end.

their the biggest you can get on a 13b. Thats an S5 TII vs. RE.
-a

note: I took this pic from the web, so I have no idea who those ppl are, but thanks for the pic.

Go RE... :D

https://www.rx7club.com/attachment.p...chmentid=96019

wow! Thats a big difference..
Is it really T2 front plate vs. RE front plate comparison?? I never knew that its that different.

sorry to interupt,
i know that 13B-REW is from Fd
the 13BT is from Fc
where is the 13B-RE from ? cosmo ? S5 ??

i am still new to this please explain.
Thanks.

I believe 13b-RE came out of Eunos Cosmos.. Most people think of Eunos Cosmos having 20B, 3 rotor engines, but they also came with 2 rotor RE engines. I'm not sure what else had RE engines beside Eunos Cosmos.

If I'm wrong about this, please correct me.. I've been reading too much crap and I get little confused..

PHIL

that's right.
the cosmo had a 13b or 20b option.

here's the RE compared to an REW iron.

i think that there must be some kind of error, because cosmo is also using 13B-REW.
i think 13B-RE is from FC3S GTX(S5)
and 13BT is from FC3S GTR(S4)

check this out:
http://www.scuderiaciriani.com/rx7/engine_tech.html

No, that is just wrong.
The 13b- Re and 20b are both from the Eunos Cosmo.
-a

Yep, 13bRE and 20B were engines for the Cosmos.

does anyone know how to tell the differents betweem S4 and S5 engine by looking at it??