aZn_Rx7

Anybody think this is possible? I'm trying to look for more specs on that engine in terms of dimensions and such becuase I'm thinking of giving it a go.

Granted the RX-7 stock engine has a faster 1/4 time than the rx-8, isn't the rx-8 slightly heavier and all? I'm thinking that in an RX-7, add a turbo, intake, straight pipe, exhaust, intercooler, street ported, blueprinted, larger injectors, higher voltage plugs and wires and I'll be passing up vettes, vipers, and porches at will with a blip of the throttle with confidence that the renesis is more stable and reliable than the stock engine.

Please let me know your thoughts. I'm trying to obtain as much input as possible before I end up blowing money on a shell and an engine (the engine would be a direct import from Japan of course).

spurvo

There's other threads on this. Ultimately, oyu'd do better with a V-8 that trying to cram a Renesis in there. NO TORQUE!!!

aZn_Rx7

Well then in that case, if the admin can delete this post, that'd be great.

I'll just work on doing a search.

ZeroBanger

UM...Actually you are cramming a V8 in there. The renisis is smaller and lighter than the 13B-Rew. Third gen Rx-7's would have no torque without the turbos. Im sure there will be a forced induction solution for the Rx8. Case closed.

Steel

but isnt the whole problem with forced induction of rotaries is the fact that as soon as you do it, emissions and reliability take a nosedive? And i bet those side exhasut ports come out of the block at weeeeird and funny angles n stuff.

ZeroBanger

The renisis engine takes care of any emissions issues. They claim it will e a reliable engine. Time will tell what effect forced induction has on the renisis, but since its supposed to be more reliable even in n/a form, I would suggest that a forced induction renisis will be more relaible than a forced induction 13B-rew.

JMO

stik6shift00

i heard there is going to be some trouble putting a turbo on that engine...anyone else know about this

j9fd3s

iTrader: (3)

yes the look under the hood, there no room

mike

wonder1and

RP will be doing this soon I'm sure... they are getting 2 of them

Kento

They'll have to dial back the compression ratio quite a bit, along with ignition timing, if they leave the CR as is. That will limit the amount of boost they can safely use with pump gas.

spurvo

Plus it has "colder" exhaust output which won't spool turbos as well (source: Rob at Pineapple).

Herblenny

iTrader: (13)

I also heard something about the compression issue (too high?).. So that putting a turbo will almost mean, bye bye engine..

But when you think realistically, getting a renesis engine, getting custom turbo kit, and all.. it will be cheaper to just go with ported fd engine with single turbo.. it might make more power.. and proven to work..

Railgun

https://www.rx7club.com/forum/showth...threadid=49464

Compression's too high to get any decent boost.

ZeroBanger

Nothing a cracked APEX seal cant fix.

rynberg

Nathan Kwok

The ideal form of forced induction for the Renesis would be a low-boost supercharger. Turbo's really don't work that well with the design, for the reasons mentioned above and also due to them causing slow catalyst lightoff. IMHO, the best application of the Renesis would be as it is in the RX-8 but in a small, lightweight car like the Lotus Exige.

Nathan Kwok

The ideal form of forced induction for the Renesis would be a low-boost supercharger. Turbo's really don't work that well with the design, for the reasons mentioned above and also due to them causing slow catalyst lightoff. IMHO, the best application of the Renesis would be as it is in the RX-8 but in a small, lightweight car like the Lotus Exige.

skunks

do the V-8 swap, much more worth it in the end

GoodfellaFD3S

iTrader: (213)

Putting a V8 in an RX7 is like drawing the Mona Lisa with crayons.

skunks

how so? would having double or possibly tripple the amount of the torque as well as hp a rotary puts out n/a not be fun or relible? ok, so it adds a bit more weight to the car but could you tell the difference? I doubt it! I know I could not tell the difference. (I know some people with heavier sound systems in their cars oppose to a V-8 haha).

BTW: A V-8 would be cheaper and much easier to put in to a FD rather then a Renesis!

7-80

Oh uh...a V8 in an FD, that would just make the refined RX-7 sloppy.

7-80

That's just stupid! Unless yer frum the hills of Arkansas, ya shtupid redneck!

ZeroBanger

How the hell do you know this? The renesis will be way smaller and more compact than a V-8. IMHO, the renesis while will not be a straight bolt -on, it *WILL* fit easier in the engine bay and be easier to install.

Please share with us your insite on why a V8 swap will be easier.

GoodfellaFD3S

iTrader: (213)

It's the principle. The rotary is the soul of the RX7. I'd rather have 400 to the ground out of my BNR-turboed 13B than 600 to the ground out of an L88. Nothing against 'em, just keep the damn motor in a Vette .

ZeroBanger

You and I think alike on this subject. "The Mazda Rx-7 Performance handbook" said it best when they said "A Triumph Spit fire or Datsun 510 with a rotary acts more like an RX-7 than an Rx-7 with a V8".

To me, if it doesn't have a rotary, its not an Rx-7.

BTW: Thank you for defending our country. you have my respect.