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Problem After Problem

GankTank

By GankTank,
in Engines & Forced Induction

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GankTank Apprentice

GankTank

Posted
Posted

Hey guys,

recently stumbled across this site so thawt id pick your brains,

i have a c35 laurel which use to be rb20de, now gen 2 rb25det,

realised that it boosting only a low 5psi so researched y so low,

came to think that maybe it still had non turbo computer but cant find computer numbers anywer?!?!

23740 0v300 PCMNR 030 C1 6Y05,

Anyway..... thawt id try another ecu from a friend which is a rb25det gen 2

but az i went to plug loom into det ecu noticed that connection points are way different,

gona b a pain if i havto change loom....

Any suggestions?

and info on ecu numbers?

Cheers

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bluey33 Experienced

bluey33

Posted
Posted

As above boost is 5psi-7psi running through factory boost solenoid.

Boost gauge could also be faulty.

But as you said, the loom does not seem to be matching up to ECU...

Best to take pics of loom plugs and ECU and post them up.

In your case though, if i were in your shoes I would be taking it to a reputable workshop.

GankTank Apprentice

GankTank

Posted
  • Author
Posted
As above boost is 5psi-7psi running through factory boost solenoid.

Boost gauge could also be faulty.

But as you said, the loom does not seem to be matching up to ECU...

Best to take pics of loom plugs and ECU and post them up.

In your case though, if i were in your shoes I would be taking it to a reputable workshop.

Ok will upload photos tomorrow, btw this is my first turbo vehicle so i am totaly in new grounds

thanks for your time guys

GankTank Apprentice

GankTank

Posted
  • Author
Posted
As others have already said. Geeze your game doing an engine conversion yourself on your first turbo vehicle!

Lol you get that wen ur kiwi bud :D , been around rbs for a while just managed to own one thats all...

GankTank Apprentice

GankTank

Posted
  • Author
Posted
As above boost is 5psi-7psi running through factory boost solenoid.

Boost gauge could also be faulty.

But as you said, the loom does not seem to be matching up to ECU...

Best to take pics of loom plugs and ECU and post them up.

In your case though, if i were in your shoes I would be taking it to a reputable workshop.

this is loom plug in and ecu from laurel at the moment

post-78346-1289465761_thumb.jpg

luvpsi Mentor

luvpsi

Posted
Posted
prety sure if i find out wot ecu is from then i'll no what loom is.

if i was you i would save the dosh and get a aftermarket ECU with loom and wire that in you will get alot more kws and alot more for in the future

DO IT ONCE DO IT RIGHT!!!!!!!!!

GankTank Apprentice

GankTank

Posted
  • Author
Posted

if i was you i would save the dosh and get a aftermarket ECU with loom and wire that in you will get alot more kws and alot more for in the future

DO IT ONCE DO IT RIGHT!!!!!!!!!

Oooooo when i hear aftermarket ecu i rub my hands together like i fly, Mwha hah hah

KiwiRS4T Grand Master

KiwiRS4T

Posted
Posted
Hey guys,

recently stumbled across this site so thawt id pick your brains,

i have a c35 laurel which use to be rb20de, now gen 2 rb25det,

realised that it boosting only a low 5psi so researched y so low,

came to think that maybe it still had non turbo computer but cant find computer numbers anywer?!?!

23740 0v300 PCMNR 030 C1 6Y05,

Anyway..... thawt id try another ecu from a friend which is a rb25det gen 2

but az i went to plug loom into det ecu noticed that connection points are way different,

gona b a pain if i havto change loom....

Any suggestions?

and info on ecu numbers?

Cheers

That ecu number is for a Series 1 C34 Stagea turbo auto with what the Skyline people would call a S2 RB25DET. What you need is an RB20 actuator for your turbo which will give you around 10 psi or just use a cheap bleed style boost controller (or an expensive electronic one if you have the means!).
GankTank Apprentice

GankTank

Posted
  • Author
Posted
That ecu number is for a Series 1 C34 Stagea turbo auto with what the Skyline people would call a S2 RB25DET. What you need is an RB20 actuator for your turbo which will give you around 10 psi or just use a cheap bleed style boost controller (or an expensive electronic one if you have the means!).

Ahh k sweet az, how did you find out about ecu numbers? if i use rb20 actuator, how will the hi/low boost react?

KiwiRS4T Grand Master

KiwiRS4T

Posted
Posted

There is a list of ecus on the SDU website but anyway I used to have such an ecu. You should biff the stock solenoid and either run a pipe straight to the actuator for around 10 psi or run a bleed to get more (or a proper boost controller).

You can get more boost from the actuator you have by biffing (or at least by-passing) the solenoid and using the T to run a bleed to to the bov return pipe. You need to relocate the restrictor in the actuator line to the bleed line. If that doesn't give you enough boost you can progressively drill out the restrictor (bigger hole = more boost). i.e. existing line from boost pipe to T, one line to actuator other to bov return pipe.

KiwiRS4T Grand Master

KiwiRS4T

Posted
Posted
Same as r34 rb25 ecu.
Sadly the ecu in question is from a S1 Stagea (with the R33 engine)which looks like the R34 plug but the ecu is different in a number of respects. If it were a S2 Stagea (with the neo engine) it would indeed be very similar to the R34 ecu and would be capable of accepting a Nistune chip which the S1 cannot.
STATUS Grand Master

STATUS

Posted
Posted
Sadly the ecu in question is from a S1 Stagea (with the R33 engine)which looks like the R34 plug but the ecu is different in a number of respects. If it were a S2 Stagea (with the neo engine) it would indeed be very similar to the R34 ecu and would be capable of accepting a Nistune chip which the S1 cannot.

i thought a repin was all that was needed to run a r34 ecu? will have to check my notes.

GankTank Apprentice

GankTank

Posted
  • Author
Posted
Sadly the ecu in question is from a S1 Stagea (with the R33 engine)which looks like the R34 plug but the ecu is different in a number of respects. If it were a S2 Stagea (with the neo engine) it would indeed be very similar to the R34 ecu and would be capable of accepting a Nistune chip which the S1 cannot.

The engine in car is not neo

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