The Efini twins were only produced on the 99-02 FDs and Mazda said that they were pushing out 280 hp on their cars but man think MAZDA undervalued their cars. The actual HP was between 300 and 308

 

Thanks for the clarification. I thought that the Efini brand was used up until the demise of the FD in '02. That's strange that the 280ps versions are cheaper than the older versions. Does anyone know what the original turbos sold for at stealerships back in '93/'94/'95? How about the 280ps turbos when they were in regular production? Now i'm curious what turbos were more expensive when actually being produced, '92-'97 (efini around the world, thanks again for clarification), or the 280ps versions.

 

Where did you get your information? Post facts (i.e. a link to the website where you're getting your information). I'm not going to say that you're wrong, but I'm going to trust DaiOni until you can back yourself up, because he lives in Japan and has ~20 times the number of posts that you do.

 

DaiOni is correct.

1. The RX-7 was not marketed under the 'Efini' brand name after 1998. 'Efini' was like Mazda's version of Lexus. Same company, but a different name was used because they wanted to portray a different image. I don't know if the Efini name is still used in Japan or not.


2. The 99-02 turbochargers have an abradable seal. An abradable seal is the result of a more modern manufacturing technique, and yields tighter tolerances, which should make them more efficient at stock flow levels. However, the abradable seal isn't the only difference: the compressor wheels are smaller, which will make them less efficient at higher boost levels. According to Japanese publications, the earlier turbos (93-98) spool slightly slower, but will make more power at higher boost levels.


Most of the power increase in the 99's came from better ECU mapping, combined with minor flow mods in the intake, IC, and exhaust paths. According to the dyno chart at the rx7.net website, the car makes an honest 280HP. There were 250HP version RX-7's sold during the same time period, but I'm not sure if they used the exact same turbochargers or not.


Tons more info here:
http://www.rx7.net.nz/newrx7.htm


-s-

 

In October 1997 mazda released the rs-r anniversary edition. It was the first rx-7 to wear the 'flying m' and signified the end of efini as a brand name.

Does efini still exist? Not as a brand, but some dealerships still carry the signage. In fact, when my FD had a problem that was hard to track down, my dealership rang a tokyo 'efini' dealership - noting that they were experts on the FD.

DDagman is right, in stating that the upgraded FDs did have closer to 300ps. The majority of the power increase is most likely a result of the exhaust modifications (better muffler and a thinner (more volume) downpipe) - and, the fact that it runs more boost.

91-95 all cars had 255ps
96-98 up to 265ps (y-pipe, more boost)
98-02 265ps (RB, RB-S, RB auto, Spirit-R type C) and 280ps (R, RS, RZ, R Bathurst R, Spirit R type A, B.

The 255/265ps versions used the same turbos that began from 91-02..

Current mazda japan pricing on the 255/265ps turbos: US$3108

280ps = US$3062

 

hypathetically, technically, in certain conditions *can*...
if you have a huge intercooler, good engine management, and all the other mods that go with it.

why does everyone concentrate so hard on boost pressure? boost pressure doesn't mean anything. concentrate on what the engine is doing! afr's, egt's, knock values, etc--and not the knock values you get from the pfc...get a real knock sensor.

i've run 18psi on 91 octane pump gas in a daily driver and had it be reliable before...and i've seen people blow things up at 8psi with a smaller turbo.

it's been said a gazillion times, but i'll say it again:

TUNING IS EVERYTHING!

 

What knock sensor do you recommend?

 

as of my understanding, a friend of mine inserted the 280ps turbos onto the 255 model, the effect is increased boost.

for those that is stripped out from a scrapped car or so called used turbos, in my country it's going only around USD200. as for the 280ps turbos, it's going around USD250 to USD300.

all these are 2nd handed, taken out from those so called "half cut".

how high the boost, basically i wasssssss previously running at 0.9 BAR which is around 14 PSI.... did not have any difference in my water temp.... i haven't try before 17 psi.... don't wanna cook my bearings....

 

just FYI
i didn't blow my engine. yet..... just that it wasn't tuned well like the others were mentioning.
high boost gives a couple more HP if the a/f able to compensate on that...as long as the engine doesn't run lean during high boost applicaiton everything is good.

 

Thread derailed enough already.....

He has a stock ecu. He should not boost over 10 psi. Period. End of story.

DDagman, PLEASE take advantage of the FAQ thread, Archives, and search function before posting general type questions.