truejunx7

do you think the new rx-8 rotary engine could fit into an rx-7? if it could, that would be so freaking hot

Senseny

Why would you want to put the Renesis in there. I think it is slightly smaller in dimension so I am sure it would fit. Intake and exhaust are in different spots so that might require lots of custom work. It has less horsepower on the down side, on the up side, no turbos, more reliable, longer life I guess. I am just not sure what you are trying to accomplish with this conversion. Also it is not like the motor will look that different under the hood. No plumbing (which I like to see) or vac lines. Anyway I don't see that as being a very popular conversion. Now adding a supercharger to my Rx8, that sounds like an idea.

xchaos

I think there are a few working on the FI side of it for the RX8.

Good bit of development left for that i'm sure.

cabaynes

iTrader: (4)

i think the newb is under the impression that just because it's the RX8 motor, it must be better than the RX7's... so therefor a swap would just be totally awesome and instantly make the car better. what he doesnt understand is the differences between the two, and how it really isn't a great idea at all.

FormerPorscheGuy

I would think more people would want to put a turbo 13b into an RX-8. The thrid gen engine produces more horsepower and a lot more torque then the renisis. A 20b has already been installed in an RX-8.

Sprockett

NOOB

airborne

you mean the all new 200hp rx8 engine? what a disappointment.

Icemastr

iTrader: (2)

truejunx7? You mean you have a fully built Jun motor in your rx-7? With Jun pistons, rods, camshafts and everything?

SNracing

correct me if im wrong but, doesent the Renesis have more naturaly aspired hp than the 13b? slap a turbo on the Renesis, (which should be avaliable sometime in the near future) and it should have more hp than the 13b with twins.

anyone know what the hp of a 13b is w/o turbos?

DSMguywantsFD

considering the compression is already 10:1 i would guess a turbo renesis wouldnt get you as far as a 13brew can go.

Zyon13B

The reason this conversion is a good question, is because when the new rx7 comes turboed with 300hp, it will also be swappable. Also there's rumors of a new rx3 with a turbo charged renesis. Good Question Noob!

Kento

Negative, ghostrider. Originally, Mazda quoted 250hp for the Renesis, while the FD was rated at 255hp. However, they've recently had to backtrack on the RX-8's number, as problems with meeting EPA emissions have forced them to roll back power. Now they're saying it's more like 235hp.

Also, as previously noted, the compression ratio is too high to just "slap on" a turbo. If there was one made, it would have to keep boost down to low levels in order to avoid detonation.

Mahjik

iTrader: (1)

You missed his question. That FD 255hp is with forced induction. The 235hp (or 250hp) for the RX-8 is NA. That's what he's asking, what would the 13b for the FD generate WITHOUT the turbos.

Kento

I guess I was focusing too much on his idea of "slapping on" a set of turbos onto the Renesis...

Ryu

i'd say no more then 200hp if that. if you took the turbo's off and put a N/A manifold on it you'd lose lots of power.

Jasooner

Icemastr how do u know his name isnt jun?

anyways, the whole idea seems a bit too much trouble...

neofreak

Its ~180ish.

rynberg

I doubt it's even that much, considering the 91 n/a 13B only made 160 HP with a higher compression ratio.

I once dynoed with a small boost leak and only made 178 rwhp (205 hp).

truejunx7

i just really hate the turbo lag on the 13b.. so im sorry for all the people who wrote flames that i am a newb, but i just like the 20b around 235 hp n/a.. for those that made comments with more use, thank you.. for all u haterz.. go home

Scrapiron7

The turbo lag that spools up by 2500RPM? With the sequential system there isn't really lag so to speak...

Ryu

if you think that waiting till 2500 (if thats even waiting) for the turbo's to spool is alot of lag then you need to go drive some more turbo cars. my friends eclipse gsx doesn't spool till 4000. now thats a lot of lag compared to 2500.

rynberg

Well, there may be a lack of low-end torque below 2500 rpm, but there is virtually zero lag with the stock sequential twins. No rotary is going to have good low-end torque below 2500 rpm, turbo or not. An n/a 20B isn't going to be much better below 2500 rpm and will be worse above.

Since I don't consider myself part of the "Y" generation, it took me a while to figure out all this "haters" crap meant -- it's a term used for people who point out flaws/cons of someone else's plan, even if those flaws exist....

rxrotary2_7

v8 guys are getting upset that we are not consistant about moving threads... so off to the other section.

rxrotary2_7

ya know what.... screw it. the other section is titled *other engine* conversions. a renisis is STILL a rotary. that section is for the V8's and the like.

GoRacer

iTrader: (2)

The question came up at 7stock and I was going to ask it myself. Rob mentioed there should not be any fitment issue but the problems are with the ECU for a turbocharged version.

I don't see how there is any negatives with this. The engine is more efficient and cleaner, which means no smog pump and passing CA smog tests. If the price of an engine is similar to a rebuild then damn, so freeken what if custom manifolds and what not have to be made for the turbos. Don't people allready do that now?

ok so you can't wait for the mazdaspeed version so you get the NA engine. Don't people allready slap on so called illegal turbo kits and get away with it? What's it matter if you do it on a Renesis engine?