RB26 into R33 RB25 Auto

[Martin Donnon]

Has anyone here performed a conversion like this? and kept the auto trans on the back of the RB26 complete with factory RB25 auto trans computer? Be interested to hear

[craz0]

I'm also interested, I've done a search but didn't come up with any thing.

[Nismo_Boy]

I have seen pics of a R32 GTR, with an auto box out of a R32 gts-4. I no longer have them any more though.

Interesting conversion, no idea why you would. But I guess if you can do that, you can do anything. (pending money)

[craz0]

No one really plays with the Auto's, plus my wife drives it more then I do.

I was thinking leaving the RB26 standard other then Exhaust, filter and a little boost.

Just trying to see what works, if the R33 GTST Auto box meets up, what brake upgrades I would have to do, new rotors/pads etc. Any other mods I would have to consider.

[LBR33]

That would be a great idea there arnt many fast auto skylines

[NXTIME]

slightly off topic, but I recall a pic I saw of a recent drag meet in Oz that had an interior shot of a two speed auto in an R32 GTR. I'll see if I can find it.

[Rowdyr32]

Easy conversion I guess its the same as the rb26 I'm putting into my 32gtst. All I had to do was chop the diff of the side of the sump, all the wiring just plugs in the only thing I have left to do is fabricate the ic and exhaust piping and bolt the engine back in tonight.

[rs73]

There's a few issues you'll need to address:

1. RB26DETT needs an RB26 ECU, and won't run properly with RB25 ECU, may even not run at all.

2. RB26 ECU are designed to be in a manual car, not auto, therefore:

3. RB25 Auto computer may not get proper signal from the RB26ECU, and

4. RB26ECU won't cut power at shift point, causing huge amount of shock that needs to be endured by the auto trans, which brings up the question

5. Is RB25 auto trans internal strong enough to handle the power and torque of a RB26DETT??

[Fly_With_Sky]

There's a few issues you'll need to address:

1. RB26DETT needs an RB26 ECU, and won't run properly with RB25 ECU, may even not run at all.

2. RB26 ECU are designed to be in a manual car, not auto, therefore:

3. RB25 Auto computer may not get proper signal from the RB26ECU, and

4. RB26ECU won't cut power at shift point, causing huge amount of shock that needs to be endured by the auto trans, which brings up the question

5. Is RB25 auto trans internal strong enough to handle the power and torque of a RB26DETT??

i was wondering pretty much the same especially with the rb25 auto. are you planning to modify the auto trans in any way as i dont think it will handle the extra torque and power of the rb26. It will have to be strangthened in one way or another if this plan ends up workin expecially if u plan to increase the power output slightly by exhaust, filters and upping the boost. Would love to hear more about this project nevertheless if it gets going. :aroused:

[craz0]

I was thinking of using a Wolf3D for a ECU, I'm pretty sure you can use the one for the GTST on a GTR or RB26 and that ECU can control the Auto, just have to make sure of it first.

If it does control the RB26 that would be great as I allready have one

[craz0]

As for the Auto I was thinking of a Bigger oil cooler, bigger stall converter and maybe a shift kit.

[Fly_With_Sky]

ok then well hope it all works out an you have yourself an rb26 powered auto car

[rs73]

Yeah good luck man.... I'd imagine it'll be quick... TT supra & TT 300ZX autos are REAL fast cars and in stock form they'll smoke any stock manual gts-t. Just make sure you strengthen that auto box as what craz0 said..... I believe the RB26TT auto would be devastating quick too!

[meggala]

you can get an rb 26 to run with an rb20 ecu seen it done

meggala

[rs73]

you can get an rb 26 to run with an rb20 ecu seen it done

meggala

meggala, will running the rb26 with rb20 ecu gonna detune the engine power output (due to different fuel maps, etc)? r u talking about std rb20 ecu or a re-chipped one?

[meggala]

a chipped one the main this is the sensors you have to remap for the different injectors ect in the gtr notor.

meggala

[TomR33]

How do you go about the 2 AFMs on an Rb26? Would you have to convert to a single?

Tom