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...

 

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?


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

 

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

 

Then why are they upgrading the clutch?

 

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?

 

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 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.

 

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...