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Old 03-07-2012, 12:12 AM   #1
jollyblue84
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Default 95 jdm sti rev limit?

Ok so 95 jdm sti or the ej20g motor. What is the rev limit on these motors? I'm wondering because I don't think mine has a rev limiter and really don't want to test it.
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Old 03-07-2012, 08:15 AM   #2
sizzflair
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mine's around 7300?
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Old 03-07-2012, 11:38 AM   #3
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Quote:
Originally Posted by sizzflair
mine's around 7300?
Did you do anything to raise the limiter or is that stock?
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Old 03-07-2012, 02:41 PM   #4
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I believe that's stock (at least on my dash). Haven't had any problems going up that high either, but then again I'm not on my stock ECU anymore.
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Old 03-07-2012, 05:08 PM   #5
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Quote:
Originally Posted by sizzflair
I believe that's stock (at least on my dash). Haven't had any problems going up that high either, but then again I'm not on my stock ECU anymore.
What ecu are you running. Mine is a prova
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Old 03-07-2012, 05:49 PM   #6
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my 1995 EJ20G (stock ecu) is about 7000. sounds like fuel cut
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Old 03-07-2012, 06:28 PM   #7
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V2 STi should be the "6K" ecu which has the same rev limiter as the standard WRXs.

7100RPM

-Rob
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Old 03-07-2012, 06:31 PM   #8
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I will also add that the 3 or 4 prova tunes I have looked at all have the same stock rev limiter. Then again with random tune, you have no idea what you are running.

Rob
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Old 03-07-2012, 07:36 PM   #9
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Quote:
Originally Posted by rob
I will also add that the 3 or 4 prova tunes I have looked at all have the same stock rev limiter. Then again with random tune, you have no idea what you are running.

Rob
No sir. I still need to send you a pic of mine. Be doing that tomorrow. So would you guys think 7000rpm would be a safe bet?
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Old 03-07-2012, 07:39 PM   #10
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take a picture of the prova with the cover off the ecu
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Old 03-07-2012, 07:45 PM   #11
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Quote:
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take a picture of the prova with the cover off the ecu
Will do in the morning around 8am central time. So don't forget to check your email.
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Old 03-07-2012, 10:01 PM   #12
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I'm running Hydra 2.6... but not sure if V2 STi vs. V2 STi RA are any different.
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Old 03-07-2012, 11:18 PM   #13
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For completeness sake;

Ver1 STi-RA :: SB :: 7800 RPM
95/96 WRX RA :: Z5 :: 7700RPM
Ver2 STi-RA :: 7k :: 7700RPM

All others are 7100RPM


-Rob
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Old 03-08-2012, 08:32 AM   #14
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There are only two valve train layouts on the early EJ20G engines (those equiped with 4-plug ECUs):

- WRX & WRX.STI version with HLA and 7100 rpm limit (although 2 versions of HLA have been used, both with the same sprins)
- RA & STI.RA version with shim under bucket and 7700 rpm limit

The Version 1 STI type RA is not in the factory documentation unfortunately (STI specific parts/tuning).
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Old 03-08-2012, 02:13 PM   #15
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is this just the STI? or does the same apply to the z4 wrx ecu?

edit: Nevermind! It is. Search rules
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Old 03-08-2012, 02:54 PM   #16
sizzflair
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Quote:
Originally Posted by rob View Post
For completeness sake;

Ver1 STi-RA :: SB :: 7800 RPM
95/96 WRX RA :: Z5 :: 7700RPM
Ver2 STi-RA :: 7k :: 7700RPM

All others are 7100RPM


-Rob
That is good to know. Thanks! I just estimated it was 7300 from the tach but 7700

I've been safe and shift around 7k, but this gives me assurance
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Old 03-10-2012, 05:46 AM   #17
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Just that it can do those revs doesn't mean it will do it all day long. I strongly advise to shift at 6500 rpm to stay in the powerband, especially when running a stock bottom end.
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Old 03-10-2012, 10:39 AM   #18
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Dyno chart on my stock EJ20G with bolt-on mods and standalone ECU, show the torque and HP drop off after 6500RPM anyhow. so no since taking it to 7200RPM for no reason. that is just 5-700RPM not making any increase in power. Shift to the next gear to get the engine back in the power band...

-=Suberdave=-
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Old 03-10-2012, 12:27 PM   #19
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Higher rev limit really helps me for rallyx (and I am sure any other racing) where a shift mid corner would kill your time.
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Old 03-10-2012, 01:36 PM   #20
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Thanks for all the input guys.
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Old 03-10-2012, 03:08 PM   #21
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Quote:
Originally Posted by suberdave View Post
Dyno chart on my stock EJ20G with bolt-on mods and standalone ECU, show the torque and HP drop off after 6500RPM anyhow. so no since taking it to 7200RPM for no reason. that is just 5-700RPM not making any increase in power. Shift to the next gear to get the engine back in the power band...

-=Suberdave=-
unless you're drag racing

but i feel the .825 5th gear and shorter would be just fine for the last 100ft
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