Results 1 to 6 of 6

Thread: ECU Question

  1. #1

    ECU Question

    Just so I know the differences:
    1- What are the differences between the GTX SC ECU and the RXP ECU?
    2-Can you use the RXP ECU on the GTX SC with the stock supercharger impeller?
    3-Will the RXP ECU change AF ratio`s? and screw things up being it is intended for more boost and intercooled. Or does it rely on other sensor input like the OBDII`s auto`s?

    What I`m getting at, is with the current mods I have now:

    Modded air box (trying this out)
    PPG Power Pipe, non res
    ND IXU27`s

    the rest is handling mods-the usual,

    Can I plug in the RXP ECU to get the r`s after I do the bearing mod and prop up-grade (3 Blade 16/21 Skat) and will it run without the V impeller and aftermarket intercooler If I don`t get the chance to install those 2 items this off season?

    Thank you guys for being patient with me, I want to understand these combos...PR...


  2. #2
    Site Admin Green Hulk's Avatar
    Join Date
    Apr 2005
    Location
    Morgan City, LA
    Posts
    34,985
    +1
    1,900

    Re: ECU Question

    Quote Originally Posted by Pale Rider
    Just so I know the differences:
    1- What are the differences between the GTX SC ECU and the RXP ECU?
    The RXP ECU has a higher rev limit and has a more advanced timing curve as well as dumps more fuel.

    2-Can you use the RXP ECU on the GTX SC with the stock supercharger impeller?
    Yes you can. I have done it on my friends stock GTX SC and it gained nearly 2 mph on top end and had better accleration.

    3-Will the RXP ECU change AF ratio`s? and screw things up being it is intended for more boost and intercooled. Or does it rely on other sensor input like the OBDII`s auto`s?
    The RXP ECU would probably work better on a GTX SC that had some mods such as a cold air intake along with a Vortech SC Impeller. It is probably too rich on a stock ski.

    What I`m getting at, is with the current mods I have now:

    Modded air box (trying this out)
    PPG Power Pipe, non res
    ND IXU27`s

    the rest is handling mods-the usual,

    Can I plug in the RXP ECU to get the r`s after I do the bearing mod and prop up-grade (3 Blade 16/21 Skat) and will it run without the V impeller and aftermarket intercooler If I don`t get the chance to install those 2 items this off season?
    Yes it should run fine, but definately plan to add some more boost later.

    Thank you guys for being patient with me, I want to understand these combos...PR...

  3. #3
    Jerry, thanks, I think I should pursue doing something with the SC, it`s prob a good idea to check the torque, then do the shaft/clutch and imp mod predicting that I`ll be pushing it this coming season...PR...

  4. #4
    How does the ECU control air/fuel ratios? is it pre-programmed, does it read from sensor inputs. I understand that the RXP may have or does? have more fuel, but will this rich condition worsen performance or longevity???

    By simply installing the V SC impleller would correct this ?...PR...

  5. #5

    Join Date
    Apr 2005
    Location
    Elysian Fields,Tx
    Posts
    358
    Changing the SC impeller will definatly help but you still won't have as much boost because the GTX has a different ratio than the RXT and RXP. The GTX has a 17 tooth drive gear and the RXP and RXT has a 16 tooth gear which turns it that much faster.

  6. #6
    Rocketman, I recently looked at the wire schematic and there is a crapload of sensors, TPS, CPS,CTS, you name it , even with built in mapping/parameters in the ECU you would think the system was infinitly variable based on all those sensor inputs, even though they have a specified range. I would just like to know what exactly occurs with the use of the RXP ECU in the GTX SC. I also see a fuel pressure difference between the 2 ski`s. I`m assuming that would have to do with that individual fuel module/pump etc. to increase pressure. So basically first thing everyone is saying is that you would need more air, via V imp, sort of to compensate for the richer AF ratio mapped in the RXP ECU?...PR...

Thread Information

Users Browsing this Thread

There are currently 1 users browsing this thread. (0 members and 1 guests)

Similar Threads

  1. Rr /ecu Question??
    By ULozer in forum 4-Tec Performance
    Replies: 1
    Last Post: 05-22-2007, 08:16 AM
  2. 4502 RR ECU Question
    By idizzy in forum 4-Tec Performance
    Replies: 9
    Last Post: 04-11-2007, 05:50 PM
  3. ECU question
    By Lvnspeed in forum 4-Tec Performance
    Replies: 7
    Last Post: 01-20-2007, 10:51 PM
  4. RR ECU question
    By Totallyblown in forum Sea Doo Open Discussion
    Replies: 8
    Last Post: 06-05-2006, 04:34 PM
  5. Used R/R Race ECU Question
    By 1FastTrespiper in forum 4-Tec Performance
    Replies: 22
    Last Post: 03-10-2006, 08:54 AM

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •