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-   3rd Generation Specific (1993-2002) (https://www.rx7club.com/3rd-generation-specific-1993-2002-16/)
-   -   Turbos - stock vs 99 spec (https://www.rx7club.com/3rd-generation-specific-1993-2002-16/turbos-stock-vs-99-spec-732442/)

spaceman_spiff 03-20-08 10:15 AM

where can these said ecu's be purchased?

Mahjik 03-20-08 10:21 AM


Originally Posted by spaceman_spiff (Post 7999228)
where can these said ecu's be purchased?

You can typically find used Pettit ECU's for sale in the classified here on the forum. Otherwise, contact Pettit Racing:

http://www.pettitracing.com

The ECU is good for about 35-360'ish rwhp on a ported motor. With stock ports, expect 320-330'ish rwhp on increased boost.

It does not work with upgraded injectors.

gracer7-rx7 03-20-08 10:33 AM

Fwiw, RX7.com sells new 99 twins for $2,595.
http://rx7.com/store/rx7/fdturbo.html#efinitwins

I've been pretty happy with them but BNRs are a good alternative also and more easily support running high 15+ boost levels if that is your goal. Running high boost levels on either the stock 93-95 or 99 twins decreases their life. I personally wouldn't bother running them higher than ~13 PSI if longevity is a goal. :) That being said, I dyno'ed around 350 rwhp on 99 twins, street-port and 1300cc secondaries and full exhaust & intake mods.

XxMerlinxX 03-20-08 02:45 PM


Originally Posted by ahad (Post 7999135)
haha dude it is unlikely but it did happen...one guy ordered the ecu put it in his fd blew his engine...his friend tried that same ecu and ended up blowing his engine:lol: so umm yeah it happened bro...

Sounds like that ecu was programmed for light mods if any at all. I thought you meant multiple people bought their own ecu's and all of them popped their engine. That just doesn't happen.

Originally Posted by gracer7-rx7 (Post 7999280)
That being said, I dyno'ed around 350 rwhp on 99 twins, street-port and 1300cc secondaries and full exhaust & intake mods.

Good numbers. You're right though, if you're wanting to push more than 15psi, you should definitely pick up the BNR's. 15psi and above is just too far outside of the efficiency range of the stock or '99 twins.

rx7doorhandles 03-20-08 03:05 PM


Originally Posted by j9fd3s (Post 7996037)
stock port engine? then 320ish is about right, especially with a main cat, and some reliability.

friend of mine did 387rwhp on stock turbos, but he's got no cat and a big port, turbos were basically boosting as much as he could make em (17ish, dropping at high rpms)

j9fd3s I did forget to mention in the original post that I have a stock unported engine with 115,000 miles on it. I have stock injectors and fuel pump also. I did not have the car tuned with 17psi or race gas. This is my daily driver and I have not had one problem in the one year 3 months ownership. The fuel injectors 550, 850 were not even pushing past 65% duty cycle.
14.5psi to 15 psi for reliability was the goal!!

adam c 03-20-08 03:57 PM


Originally Posted by rx7doorhandles (Post 7896536)
I have stock U.S. spec turbos that were on my 94 rx7 and made 301 whp at 15psi with the Power FC (which can cantrol boost levels on stock turbo's using stock boost solenoids), 3inch TB, other bolt ons after Dee Karagiannis tuned it......



Originally Posted by rx7doorhandles (Post 8000203)
j9fd3s I did forget to mention in the original post that I have a stock unported engine with 115,000 miles on it. I have stock injectors and fuel pump also. I did not have the car tuned with 17psi or race gas. This is my daily driver and I have not had one problem in the one year 3 months ownership. The fuel injectors 550, 850 were not even pushing past 65% duty cycle.
14.5psi to 15 psi for reliability was the goal!!

If I am understanding this correctly, you are claiming 301 rwhp, on a stock motor, with stock injectors, and less than 65% injector duty cycle.

To put it simply, that is not possible.

tom94RX-7 03-21-08 09:21 AM


Originally Posted by XxMerlinxX (Post 8000121)
.... 15psi and above is just too far outside of the efficiency range of the stock or '99 twins.

Is this like a proven fact or a myth?? Because I run them in the 18-20 psi range and I'm pretty sure its faster with more boost, not dyno proven but I think I pretty much proved it on the track.

DJF(NJ) 03-21-08 01:11 PM

On the butt dyno, I feel like my 93-95's had more torque at a lower boost level compared to my 99's. Spool up to me seems the same, but the 99s seem to be more powerful at higher boost levels...10-15psi. I do like these 99's but if I were to do it again, and being that I autocross regularly...I would get the 93-95's again for that torque out of corners. They go for about 2100 from MazdaMotorsports with the club discount.

XxMerlinxX 03-21-08 01:18 PM


Originally Posted by tom94RX-7 (Post 8003224)
Is this like a proven fact or a myth?? Because I run them in the 18-20 psi range and I'm pretty sure its faster with more boost, not dyno proven but I think I pretty much proved it on the track.

I wasn't talking about putting out more power, I was talking about reliability. The stock twins just weren't made to handle that much abuse. A couple of people here have run there twins for that long and most have only lasted a couple of months.

ahad 03-22-08 08:22 AM

neway i got my twins....bought and installed em for 300dollars...not a bad deal eh? :biggrin: the guy i bought the car had this car on stock ecu with a FC turbo and it only went to 5psi so when i got the twins on for the first time jus now it was pretty amazing...

Mahjik 03-22-08 08:49 AM


Originally Posted by ahad (Post 8006292)
neway i got my twins....bought and installed em for 300dollars...not a bad deal eh? :biggrin: the guy i bought the car had this car on stock ecu with a FC turbo and it only went to 5psi so when i got the twins on for the first time jus now it was pretty amazing...

Good deal. At least now you are driving the car the way Mazda intended it to be. ;)

ahad 03-22-08 02:36 PM


Originally Posted by Mahjik (Post 8006334)
Good deal. At least now you are driving the car the way Mazda intended it to be. ;)

yeah man wow what a car :P seriously man now im startin to actually enjoy the car...thanks for the advice uve been givin on my topics btw....


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