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Custom ECU Modification:
Raised Rev/RPM Limiter Beyond stock 7300RPM

3SX now offers a service where you send us your GOOD stock ECU and we will have it modified to effectively raise the rev limiter to 8000 or 8400 RPM!  This is very beneficial for cars that have upgraded turbos and head work (cams+springs kit) and would see good power beyond the stock 7300 rev limiter.  This process modifies your stock ECU, allowing you to easily swap between the stock "chip" for 7300, or 2 alternate "chips" for the 8000 or 8400 RPM rev limiter. 

Your ECU is modified to accept the stock "chip" or an alternate one which serves to "overclock" the ECU.  This overclocking results in your tune needing a little fine-tuning as it will be about 10% leaner than the stock settings - this % change is equal across the RPM range. 

3000GT/Stealth Stage 1 Stage 2 Stage 3
1991 Stock 7300 RPM 8200 RPM
Tune Shift 12.3%
8400 RPM
Tune Shift 15%
1992-1995 Stock 7300 RPM 8060 RPM
Tune Shift 10.5%
8400 RPM
Tune Shift 15%
1996-1999 Stock 7300 RPM 8060 RPM
Tuen Shift 10.5%
 

Another side-effect of the modification is that the communications baud rate of the ECU is shifted so your datalogger/scantool may not connect properly without upgrading it - you will need to contact the specific manufacturer to check on firmware updates or how to properly reconfigure it.

 

This can also be done to the SOHC ECU's, with the 10-15% increase in rev limit, getting closer to 7000.

 

NOTE: This is NOT a rebuild. Your ECU must be in good working order as the unit is not tested, simply modified to accept the different "chips".

This service is offered such that you have to send your ECU into us, we have it modified, then ship it back to you.  You MUST place the order online and send a copy of your order with the ECU so we know who's ECU it is when it arrives here.  Shipping may calculate higher than you expect because we ship the unit insured for about $1500.  We recommend that you ship it to us via a certified trackable carrier (UPS or Fedex) with sufficient insurance on it as a new ECU costs about $1200-$1400. 

Turnaround is typically about 2 weeks after we receive your ECU from you.


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