25de To Det Conversion- Help

[juddieR31]

Hi all, I have most parts to do the conversion. I plan to use the stock ecu, is this possible and if so, what problems am I likely to encounter along the way with fuel etc????? Ideally im after someone who has done this and had the odd drama to explain how they went about their conversion. The 25DE is currently in an R31, also am I going to need to upgrade fuel system etc?? Cheers guys, might sound like a newbie question but I need to know so I can start planning the install finally.

[SKY 34]

dun think you can use the same ECU...if it's RB25 DET, the ECU reads turbo pressure control the actuator......wihtout the capacity to read boost the actuator will realease pressure mechanically, can't remember the pressure but it's low...however since RD25 DE to begin with, you can't put much pressure in anyways...

should join R31 skylines forum

http://wiki.r31skylineclub.com/index.php?title=Welcome

ask there for more details...why don't get RB 25 DET to begin with?

[LBR33]

Try asking in the NA section a few guys have done turbo conversions, but if possible it would be worth getting a factory turbo car due to the bigger brakes,LSD ,stronger valvesprings etc.....

It really isnt a case of just bolting up a turbo.

[BHDave]

In the initial stages for installation and getting the thing running yes, you will be able to keep your standard ecu and standard injectors.

Due to the very high compression of the de you will be limited in how much boost you can run. Id be running it off the standard actuator for around 7 psi max (lower if you can initially until you get some sort of tune happening)

You can increase the base fuel pressure to give yourself a little more head room for your stock injectors or you could get a hold of some slightly larger drop in's (what size are de injectors anyway? do det injectors fit?) and run an safc, the second would be preferable.

You will need a decent sized intercooler of some sort to raise the detonation threshold even with low boost due to the high compression.

And you will need to install a one way valve into the brake booster feed line if it doesn't already have one.

A decent fuel pump would be manditory. Are de and det fuel regs the same? You'd probably want a det one if they aren't for the on boost side of things.

just a few thoughts off the top of my head from being involved in other de-det conversion on other cars. The extra torque should make it fun

[juddieR31]

dun think you can use the same ECU...if it's RB25 DET, the ECU reads turbo pressure control the actuator......wihtout the capacity to read boost the actuator will realease pressure mechanically, can't remember the pressure but it's low...however since RD25 DE to begin with, you can't put much pressure in anyways...

should join R31 skylines forum

http://wiki.r31skylineclub.com/index.php?title=Welcome

ask there for more details...why don't get RB 25 DET to begin with?

Been a member for nearly 2 years