Just picked up the Dec issue of "Modified Mag" as I saw that they had a feature on the RE-Amemiya Turbo RX-8. There is a great write up regarding the specs of this beast.

"Trust elevates the stakes with a TD turbocharger breathing through a Trust Airnix air filter. The turbo itself is connected to an RE-Amemiya exhaust manifold and compresses the intake charge to 14.5-17psi. Equipped with a Greddy intercooler, a 3-layer RE-Amemiya aluminum radiator, and an RE-Amemiya oil cooler. Bumping up the power to 256whp and 325lb-ft of tourque required upgrading the drivetrain. An ogura racing singlr plate clutch controlled by an RE-Amemiya clutch hose allow for crisp gear engagement while an RE-Amemiya Super racing LSD doles out the torque where needed"

No prices listed but this looks very promising. Hope this isnt old news. Didnt have time to do extensive forum searching.

sweet!

Hmm... Interesting...

...Bumping up the power to 256whp and 325lb-ft of tourque required upgrading the drivetrain....


Oh man, looks like some people will be dissapointed with that.

What did they measure their whp at prior to the upgrade?

Was this a 20 hp boost from 238, or from 60 hp boost from 198? Either way, the torque looks like it's almost double stock, can't argue with that.

Somewhere between 14.5-17 psi of boost and they only got 256 rwhp? That's got to be one damn small turbo.

something is not right. Hell of a lot of boost and no internal engine mods? only like 60 HP that is not right or is really sorry!!

Am I missing something? HP = (TQ*RPM)/5252, correct? So the RE-A turbo'ed engine only goes to about 4100RPM? Is this complete novice-leaving-stuff-out math on my part? RG, and knowledgeable others, am I missing something here?

Regardless, it's still impressive if they've got it working.

Doesn't sound right. An increase of ~70 hp and ~200 ft-lbs? I'd expect a much bigger horsepower increase to accompany that monster torque increase.

256 whp? What's the crank then.. 280?

Oh man, looks like some people will be dissapointed with that.


Ya, almost reinforces some people's worries that the RX-8 tranny is weak. Then again it is more than double the stock torque.

the numbers make sense when you switch em?

325hp at 8000 rpm is 213lbs of torque which would make sense with a torque peak of 256ftlbs.

About 300 crank. Really the only thing that makes sense is he got the torque and HP numbers reversed. Theoretically the engine could make a lot of torque in the lower RPMS but as the RPM increased flow became very poor so the torque dropped off and was only increased by about 15-20% over stock from 4500RPMS on up.

I have this issue. Gotta love Modified Magazine for having a rotary sports car on almost every issue they have. Other magazines stress on calling the Civic a sports car.

It is possible to make those numbers. You need to remember that while hp and torque cross at 5252 rpm, it doesn't mean your torque peak below 5252 has to be less than your power peak above this. The torque above 5252 would just be lower than the hp. Thsi would probably look like a very strange dyno curve. Hp would rise very quickly and then stay fairly flat while the torque would rise extremely sharply and then fall back down fairly quickly. It would almost look like you took a standard dyno graph, flipped it 180 degrees and then switched the torque and hp labels around. It would be a very strange curve indeed but it is possible. It would probably feel like a Cobra off the line. great initial low end torque but it just doesn't keep pushing you back into the seat as the rpm's rise. It would feel like all of the acceleration were instant at off idle.

With numbers like this with such a low power number and high low end torque number from such a high psi of boost, it would have to be a very small turbo.

The article states this "Handling the brain work for this RX-8 is an Re-Amemiya Redommini working in conjustion with a trust e-manage. Amemiya-san is still running stock internals. With stronger Apex seals and a turn of the boost dial, the power to weight ratio of this car could take several steps in the right direction. However, for now it serves as a calling card for re-Amemiya and a preview of the things to come from the Renesis."

They have the specs as 250hp at the flywheel. No mention of whp they used as a baseline. The numbers do seem out of whack considering that most figures posted so far still show torque being lower than HP and none showing anything over 300lb-ft, but RE-Amemiya is a well known rotary tuner so I would imagine its legit.
Here is a link from their website, But I cant read japanese
http://www.re-amemiya.co.jp/rx_8/rx_8_at.html

and 2 more pics

Am I missing something? HP = (TQ*RPM)/5252, correct? So the RE-A turbo'ed engine only goes to about 4100RPM? Is this complete novice-leaving-stuff-out math on my part? RG, and knowledgeable others, am I missing something here?

Regardless, it's still impressive if they've got it working.

Most turbo cars hit a peak torque early in the rpms and then the torque falls off as rpms build. So it's possible that the peak torque is between 3000-4000 rpms and then it falls like a rock to 9000 rpms where the torque would be around 150 ft-lbs. That's if they're still using all 9000 rpms.

I have a car with a 2.5L 4 cylinder (gas, not diesel) turbo and the old turbo was a Mitsubishi TE04, very small, everything uncorked it could push out about 18 psi max dropping off too about 16 psi by redline (7500RPM). The vehicle is an automatic, and with that setup made 200WHP and 390lb ft of torque.
Here is a link to a dyno graph of a vehicle with a smiliar setup http://www.turbominivan.com/dyno.htm

I couldn't read some of the article so I don't know if they said so, but the car could be an automatic, in which case it could have torque multiplication in the lower RPM range too.

The RE Amemiya car is an auto

The RE Amemiya car is an auto

Then why are they upgrading the clutch?

Most turbo cars hit a peak torque early in the rpms and then the torque falls off as rpms build.
Technically that is entirely dependent on the size of the turbo used but I understand what you are saying.

I thought this thing came out a long time ago, isn't this the GReddy rig?

Then why are they upgrading the clutch?

RE Amemiya web site says auto, don't know where the magazine got it's info.

Quote from their site "RX - 8 (4AT exclusive use) turbo kits"

http://www.re-amemiya.co.jp/rx_8/04_turbo_kit_rx_8.html

The RE AMEMIYA site shows a turbocharged automatic Rx8 and the dyno on their site (http://www.re-amemiya.co.jp/rx_8/grafu_1.gif) shows that it made a little over 260 PS @ 7500 RPM -- which converts to around 256 hp. Maybethis magazine is confusing the numbers for that old turbocharged automatic w/the turbocharged manual Rx8 in that magazine. I wouldat least hope that this iswhat the case is.

The automaticRx8 currently only makes around 150 or 160 whp (or something around there Im guessing) so 256 whp would comeout to nearly a 100 whp gain for the automatic Rx8.

:confused: why turbo a automatic when you havent got a manual car running with turboat decent figures ??

cheers
michael

Because turbos on automatics own. Can you say instant boost :)

I dont knowwhy they made a turbokit for the automatic first butthey did. One last thing - if you notice the pics of the yellow automatic turbocharged Rx8 on Re Amemiyas site and the yellow Rx8 shown in the magazine --they are identical (same exact bodykit). I thinkthe magazine definitely passed off the automatic turbocharged Rx8 as a turbocharged 6spd manual. And finally on this page -- http://www.re-amemiya.co.jp/rx_8/04_turbo_kit_rx_8.html -- I cant read the Japanese but I am seeing 498,000 underlined in green --which Im assuming means 498000 yen. Ithink the dollar is currently worth 106 yen today so that would translate to roughly 5000 bucks. Makes sense to me...

Thanks RG and Wombat. I just wasn't thinking it through far enough, obviously.

Happy motoring.

Then why are they upgrading the clutch?

exatly its not an auto and its probably a typo, however even they other way around thats pretty incredible.

They probably meant torque converter rather than clutch. With low end power like that, you'd definitely want to change it.

"An ogura racing singlr plate clutch controlled by an RE-Amemiya clutch hose allow for crisp gear engagement while an RE-Amemiya Super racing LSD doles out the torque where needed""

I think they meant clutch..

Good lord this is going to rock!!!

:confused: why turbo a automatic when you havent got a manual car running with turboat decent figures ??

cheers
michael

Hey I believe that he turboed the auto 8 because of the 4 port configuration, I think the 4 port is ideal for a turbo version, and I believe it would be easier to tune. Other than that I need a turbo for my 6 spd :D

The turbo itself is connected to an RE-Amemiya exhaust manifold and compresses the intake charge to 14.5-17psi.


< scratches head> are they saying that there is 14.5-17psi of boost, or that the actual intake pressure is 14.5-17psi (aka, hardly any boost)

Hey I believe that he turboed the auto 8 because of the 4 port configuration, I think the 4 port is ideal for a turbo version, and I believe it would be easier to tune. Other than that I need a turbo for my 6 spd :D


had they just wanted to turbo the 4 port motor they could have done it with one that has a 5speed manual which is available in Japan and other countries. Turboing an AT means that they are looking at targeting the North American Market for this product.

I just got my hopes up.

add to my last post - IMHO;)

But compared to what's billed as an "unofficial" renegade (USA ? division skunkworks) factory, supercharged white Rx8 as described in this months www.roadandtrak.com/speed offshoot magazine ~ http://www.roadandtrack.com/article.asp?section_id=39&article_id=1627&page_number=1

heh. why does roadandtrack.com webmaster use italic in their title tag?

But compared to what's billed as an "unofficial" renegade (USA ? division skunkworks) factory, supercharged white Rx8 as described in this months www.roadandtrak.com/speed offshoot magazine ~ http://www.roadandtrack.com/article.asp?section_id=39&article_id=1627&page_number=1

what about comparing it to the sc'd one?

had they just wanted to turbo the 4 port motor they could have done it with one that has a 5speed manual which is available in Japan and other countries. Turboing an AT means that they are looking at targeting the North American Market for this product.


Makes sense, so we can eat our big macs and talk on our cell phones even more now!
but seriously,

How mucher stronger or how much more power from FI can the 4 port take over the 6 port? If it's even possible. Are we talking about a durability/ side seal issue here? Or a lack of SDAIS/better exhaust flow?

add to my last post - IMHO;)
I see how it is Zoom, the mods are too good to edit their posts. You just wanna add to your 39483094358094 post total. Haha just kidding, this was kinda postwhorish in itself, sorry if I just wasted everyone's time. :D

looks like a solid kit. does anyone know if it was a typo?? or is it actually getting 256WHP?? and 325WTQ? cuz thats alot of torque. Also, did it say at what RPM's its running boost settings at?

The RE Amemiya car is an auto

Exactly! I have several JDm, magazines where it was talked about... a yellow RX-8 with that RE bodykit and Enkei rims. that article seems funky to me.

exatly its not an auto and its probably a typo, however even they other way around thats pretty incredible.

The last page (page 174) of the article shows a picture of the inside. It's definitely an auto, you can see the paddle shifters and the gear selector.
Also on page 172 it shows a close up of the engine bay and you can see the
dipstick for the trany fluid.
Either way I'm just glad there moding the RENESIS and not just cheating by stuffing in a 20b or an FD motor.
Good times for all :)

for those people that find the numbers hard to believe it's very possible as stated by rotary god and others. there are many vehicles out there that have like 300hp and 1000ft/lbs of touque http://www.meadowlandford.com/ford-f650-f750-cat-engine-spec.htm

I wonder if the numbers would be different on a 6spd. I hope we can get a taste of that soon.

As I mentioned months ago... this car essentially is using the Trust/Greddy turbo kit. Re Amemiya is working with them on this car. Supposedly Trust/Greddy had done most of the work... I assume the piping, turbo and tuning.

The big question is... can the tranny take it?

The big question is... can the tranny take it?

With basically a miata transmission, I feel that this will be the next major hurdle to overcome....I honestly can't see such a tranny holding torque figures associated with solid FI kits.

This is what i"m wondering as well--however the auto can't handle high revs so it may be stout enough to handle the added power at the rev limit.

If for forced induction we do end up needing to strengthen our transmissions, how much would that cost? Would we need to replace them altogether? Or are there certain parts we can switch in made of stronger and more durable materials? Thanks

Usually the part that goes first in the miatas is the differential, so replacing that might be first on the list, as far as the transmission goes, if that is breaking as well you would probably just have to replace the whole thing. I am swapping the transmission and differential in my Miata to a 93 RX-7 transmission and differential and probably do a 5 lug conversion as well with fender flairs, and I am only targetting above 300whp.

Well I will have to call www.levelten.com on this one. I mean all this FI talk and week AT/MT is getting to me... If they helped the 3G guys the can help us out too then.

A friend told me that the 8's motor with a turbo will see some major torque gains because of its compression ratio. I dont know how true that is.

Level Ten? If thats the company I am thinking of BWAHAHAHAHA. Level ten, bwahahaha. Man you got lucky, glad it worked out in the end.

Because of the high compression the RX-8 will have the low end improved greater with a turbo than it would if it was say 9:1 compression. I wouldnt really call it a major torque gain because of the compression ratio(since turbos cause a significant torque gain anyways...), but I would say it will have more power in the lower RPMS and spool the turbo faster because of it. I liked running 9:7 compression rotors over 9:1 compression rotors, but then again do you want to run around with 100 or 116 octane gas everyday to run more than 8-10 psi?

I read the article about amemiya turbo kit in the modified mag. It just does not make any sense. First they mention that the engine was producing 240 hp stock, which would suggest it is a 6 speed. Then they say it required a new, stronger clutch - still the same suggestion, and then you see the pictures and it is a auto. It seems they're blowing smoke.

What has me curious about this whole thing is what in the world we would do with 325 lbs. of low rpm torque unless we swapped out the rear gears for something like a 3.55-3.73:1 ratio. I can't get the car to hook up as it is. I am aware of the complaints regarding the lack of low rpm torque generated by the rotary engine and I am under the impression that the rotary was not designed to be a truck engine. It was mentioned earlier that to see a 300 h.p. engine produce 1,000 lbs. of torque is not out of the ordinary. That's true if we are talking about a 4 cylinder Cummins, Caterpillar, or Detroit diesel. I am in the camp who thinks the Amemiya turbo kit is reducing the boost as the rpm's climb.

Charles

And the best part of all this HP Nu# talk is its an AUTO!!!!! Yeaaaaaaa for the AT/RX-8's

its a rotary engine, quite different from a cylinder block engine.

think about a 1.3L putting out 238hp on rotary.
then think about like a 3.0L putting out 240hp on a v6.
VERY DIFFERENT. rotary works lightweight, the horsepower is limited and the torque can fly from the new drivetrain. therefor torque is converted by a massive amount.
also like someone said above, the compression ratios do work to create more torque.

correct me if im wrong. something my friend *who has an 8 with a greddy turbo* said.

**waiting 2 months for my amemiya kit (without fogs) and ms wing. **
(saving up for the amemiya turbo kit)

You know what is funny about this forum, people complain about lack of torque, then something like this shows up and people complain that there is too much torque . . . I think I am just going to take a break from this forum for awhile . . .

on a super dinky turbo running that much boost, those numbers MIGHT make sense, but otherwise it looks like utter crap or bad translations.

You know what is funny about this forum, people complain about lack of torque, then something like this shows up and people complain that there is too much torque . . . I think I am just going to take a break from this forum for awhile . . .

Nobody's complaining, they're calling BS . . . or to be more precise, accurate numbers from a JDM turbo AT that's months old, compunded by some BS journalism. There's practically no way to double the stock torque peak of the Renesis, while raising the HP peak by ~10%.

This is clearly an AT with the Trust (Greddy) turbo.

Peace
policy

You gotta admit, those numbers look like SRT-4's more than RX-8's. It's just hard to convince anyone in this forum how a high-rev rotary engine could get higher torque numbers than HPs. It doesn't make sense at all.

<raising the BS flag> :D

ps. It would make sense, somehow, if the numbers were interchanged into 325whp 256lb-ft TQ.

Did anyone check and see if there was an oil burning, compression ignition engine under the hood??