Rb26 Into A Gtt

[shonen]

Ok ive been thinking about this conversion for a little while and would like some input/info on what exactly is needed and what needs to be modified to make it fit ?

Some of the questions I have are.

1. Can I use an PFC from a GTR ?

2. If yes for 1. then will it be pretty much plug and play or would there be a lot of mucking around with wiring looms etc ?

3. Heard that the sump needs to be modified to make the engine fit

is this true ?

4. IS the RB26 heavier than the RB25 ? Was told by one person that because of the extra weight it will stuff up the balance of the car. Said it will be quick in a straight line but no good on a circuit..

5. What needs to be moved or relocated...im guess the battery may need to be relocated to the boot.

Thats all I can think of for now......

thanks in advance.

[Abo Bob]

Driver has been doing this conversion all year. Check his threads and posts.

[R31Nismoid]

Please search mt shonen.

Its no different to R33gts-t/RB26 conversions that there are lots of posts about. All 5 above questions i know 100% have been answered before

[shonen]

Thanks adam...I wasnt aware that Driver was doing the conversion.

R31. Just with the general trend of things I just thought there would have been a lot of differences between the 33 and 34 to justify a new thread. This has been the case with most parts I tried to get for my car.

[R31Nismoid]

I'd say not really. Im putting a 26 into the 31 and its pretty similar to anyone else's using a later model 32/33

With 26 you'd be getting the whole loom aswell (i hope you are) then its just a matter of buying GTR upgrade bits like PFC and stuff, nice and easy

Everyone doing a RWD conversion needs to modify the sump.

ie. remove the GTR diff and weld the hole

[shonen]

Cool thanks for that nismoid....

but one thing I would like to know is.....is it possible to do this conversion with in a few months ?

Almost all people I have heard of doing an RB26 conversion have taken a year or longer....I cant afford to have my car off the road for so long.

Also I have not seen anyone make any remarks about the weight balance aspects of this conversion and how it affects the car out on the circuit.

[Morgs]

Theres nothing to stop you from doing the conversion in a day, if you've got all the nessicary parts, labour, and knowledge. All comes down to good planning...

In terms of weight I'd imagine a RB26 would be marginally heavier than a RB25, due to the extra turbo and associated bits hanging off the side.

[Driver]

5. My battery is still in the same spot.

3. The sump needs to be chopped.

2. The pfc is a direct fit .

1. You wil need to use the gtr wiring, alota chopping requred which is why the PFC is a direct fit.

4. The weight isnt noticable.

[Driver]

And it took me a while to do because i just didnt have the time to do it..

It is very possbile to do in a couple of months.. its mostly time consuming

The wiring is the hardest part.

The engine is a direct fit using gt-t engine mounts - gearbox etc fits up fine

You will need custom cooler piping as well as exhaust as you will now have 2 turbos

Thats all i can think of at the moment.

EDIT:

And for those who want to try and make it 4wd you cant as chassi is different and you cant fit the 4wd box.

Edited December 9, 2005 by Driver

[R31Nismoid]

Theres nothing to stop you from doing the conversion in a day, if you've got all the nessicary parts, labour, and knowledge. All comes down to good planning...

Spot on. We were gonna have mine done in 2 weekends till we found it had spat a wheel rear turb wheel... added to that JMS must have stored the motor outside for 11ty billion years as ive never seen such a rust covered motor <_<

[shonen]

And it took me a while to do because i just didnt have the time to do it..

It is very possbile to do in a couple of months.. its mostly time consuming

The wiring is the hardest part.

The engine is a direct fit using gt-t engine mounts - gearbox etc fits up fine

You will need custom cooler piping as well as exhaust as you will now have 2 turbos

Thats all i can think of at the moment.

EDIT:

And for those who want to try and make it 4wd you cant as chassi is different and you cant fit the 4wd box.

<{POST_SNAPBACK}>

Thanks for that Driver....

Like I said before I have heard that the wiring is a nightmare but is there any sort of wiring diagram available or is it all just guess work ?

and hehe I dont plan to make it a 4WD....I dont need a computer to help me drive.....hhaha well thats my excuse until I can afford an R34 GTR. :lol:

also about the sump....if it needs to be chopped...is that alright for the RB26 motors ?? I heard they need good oil supply especially out on the track and people actually put extended sumps on them...

or am I missing something here ?

[shonen]

Spot on. We were gonna have mine done in 2 weekends till we found it had spat a wheel rear turb wheel... added to that JMS must have stored the motor outside for 11ty billion years as ive never seen such a rust covered motor  <_<

<{POST_SNAPBACK}>

ouch thats gotta hurt

[shonen]

oh and also.....seems like most of you guys are doing the conversion yourselves or from the help of friends.

But if I were to pay a workshop to do it...you reckon $2000-$3000 would be enough for labour ?

[R31Nismoid]

for the 26 into the 31... its not a "large" job. Wiring is the only main thing. And i need to take to my tunnel with a sledge it seems... cant wait for that part.

other than that, bit of piping mods and stuff. 1k for your old motor out, new one in.

Then maybe $1500 to get all the other fiddle stuff like loom changing/wiring etc. I think 2.5k sounds reasonable for labour costs for a conversion. 3k tops

[shonen]

awesome...thanks for that nismoid

now how about my sump question ?

[scathing]

Could you fit an aftermarket RB25 sump onto an RB26, or do things just not line up?

People always need to baffle the RB26' OEM sump to avoid oil starvation anyway, so rather than arsing about with the OEM sump when you can just stick a nice baffled, finned and possibly winged sump instead?

Edited December 9, 2005 by scathing

[Driver]

With the sump because ure car isnt going to be on rails now its only 2wd it wont be such an issue for oil starvation

I just used the rb26 sump as it is just chopped and sealed.

Just get all the shop manuals you can get that have wiring diagrams from the r33 gtr and the r34 gt-t

[R31Nismoid]

You have to use the RB26 sump, not an RB25 one.

Thier construction is dfferent.

Just get a fabricator who is expirienced @ welding etc to chop the diff off and weld the hole up basically

[Tosh]

if your worried about the sump Thomas, when it gets taken off to be chopped and welded, just put a Tomei baffle in there. They're like $420

[StageZilla]

You have to use the RB26 sump, not an RB25 one.

Thier construction is dfferent.

Just get a fabricator who is expirienced @ welding etc to chop the diff off and weld the hole up basically

<{POST_SNAPBACK}>

y do u HAVE too? i know the rb26 one is much much stronger/rigid, but the rb25 one fits with no mods at all and bolts on like stock (different bolt holes though and its like a sheet of tin )

saves cost of fabrication work if ya on the cheap worked on my rb26 in 2wd no problems, and plenty of other do it that way.

cheers

Brad