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  1. #1

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    Max RPM for a 05' GTXSC?

    What is the maximum RPMs for an 05' GTXSC?
    The stock setup ran 6750 RPMs max. Not rev limited but setup limited.
    Does the GTXSC ECU have a max RPM that it will rev limit the engine to?
    I have read many threads on the site and see mention of the non IC GTX not having the inards for high RPMs (cast not forged connecting rods maybe pistons, valve train differences). I'm concerned with what the upper rev limit should be limited to?
    I have nearly finished the mods to my GTXSC(nonIC) and during the initial runs, the tach would easily hit 7800 RPM with the not quite full throttle quick throttle blips I tried. I went from ~62 max speed to seeing ~68 in the short runs I did before noticing an oil leak. Comments on RPM would be appreciated.
    Thanks!


  2. #2
    My 05 RXT turns 8100 and is stock. I think the REV limiter on mine is 8300.

  3. #3
    JFizzleJR's Avatar
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    Around 7650 I believe

    You shouldn't run more than 8100 on the stock internals IMO

  4. #4
    Thats just what it turns and there is nothing done to it???

  5. #5

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    I have modified the original GTXSC. I will post details in another thread to give an idea of what is possible with the mods I have made. (external Fizzle IC, 4" intake, BO-cant get freakin RE's, thru hull). I didn't change the ECU and was amazed that the RPM spun freely to 7800 at ~3/4 throttle. I was purely amazed at the initial runs. The acceleration and time to ~67 were an incredible improvement. I think it should approach 8000 RPM maybe 8100 (as JRFizzleJR mentioned) and get close to 69-70MHP. I just thought the ECU on the GTX would be programmed to limit at some lower RPM as it never went over 6750 stock. WOW.

    Quote Originally Posted by Kragar View Post
    Thats just what it turns and there is nothing done to it???

  6. #6

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    JFizzleJR,
    Do you know if the ECU will limit to 8100 on the stock GTX-SC? Thanks for the response on 8100.

    Quote Originally Posted by JFizzleJR View Post
    Around 7650 I believe

    You shouldn't run more than 8100 on the stock internals IMO

  7. #7
    JFizzleJR's Avatar
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    The 7650 I was referring to is what I thought to be the rev limit for the stock GTX SC ECU

  8. #8
    Kaybat's Avatar
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    the 215 hp 4 tecs should rev to about 8100....the 185's top out around 7650 i think....not sure what year the GTX LTD's went to 215.....

  9. #9
    bigrich007's Avatar
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    The stock 05 GTX IC LTD stock RPM is around 7950 with stock prop. The rev limiter is around 8200 rpm's. The sweet spot for power is 8100 rpm's. Base on water and air temp runs between 62 to 64 mph.

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