hi just after a bit of info i have an rb25det with full 3 inch exhaust filter and all 3 inch piping to intercooler etc running standard boost with standard turbo and standard computer just wondering if its possible to boost it up a bit with a boost tee without the computer going nuts or the turbo stuffin up my mate reckons the computer will just play up has anyone tryed this or am i wasting my time should i just save up and put the to4e on it with a programable computer positive imput would be great thanks.

RB25 ecu's have overboost protection built in. You can't boost them up as easily as an RB30. As soon as the RB25 ecu senses more airflow from the extra boost, it will retard the timing and add excessive amounts of fuel. You end up basically losing power then when left standard. You can run more boost, but need something like a Apexi SuperAFC or other air flow meter interceptor, really the best option is to go buy a full standalone engine management system. And remeber the standard turbos fail when you run more then standard boost, unlike the RB30, the RB25 has a ceramic wheeled turbine that delaminates when you run more boost then standard.

Quote: Originally Posted by RB30-POWER RB25 ecu's have overboost protection built in. You can't boost them up as easily as an RB30. As soon as the RB25 ecu senses more airflow from the extra boost, it will retard the timing and add excessive amounts of fuel. You end up basically losing power then when left standard. You can run more boost, but need something like a Apexi SuperAFC or other air flow meter interceptor, really the best option is to go buy a full standalone engine management system. And remeber the standard turbos fail when you run more then standard boost, unlike the RB30, the RB25 has a ceramic wheeled turbine that delaminates when you run more boost then standard. so i should just put a to4e on it with a aftermarket computer i was thinkin of a wolf 3d cause it would be just a plug in and tune what do you think?

micro tech does a plug in i beleive

get an apexi powerfc. It's a replacement ECU for skylines that will plug directly into the standard loom, self-learns most things and will run straight out of the box. Under a grand including hand controller. Some original photos have not been recovered yet.

Quote: Originally Posted by platinum get an apexi powerfc. It's a replacement ECU for skylines that will plug directly into the standard loom, self-learns most things and will run straight out of the box. Under a grand including hand controller. thanks thats exactly what im after so i should definetly get rid of the rb25det turbo or will it be ok for a while on around 14 psi or is that to much for it should i put a to4e turbo on or is there a better suited turbo ? im not after a drag weapon just a bit more power it what do you guys think.... Some original photos have not been recovered yet.

It'll be ok for a while, but dont go higher than 1bar of boost on it, and plan for an upgrade whenever you can.

Quote: Originally Posted by evl_25t so i should just put a to4e on it with a aftermarket computer i was thinkin of a wolf 3d cause it would be just a plug in and tune what do you think? PowerFC and a GCG hi-flow turbo is what you want, 250rwkw with response almost identical to the factory turbo, just with another 70rwkw on tap and heaps more mid-rangs. Wolf + a t04 is like going back in time if you ask me. Why put 1970's turbos on there, they are pointless. Give the RB25 the benefit of a decent turbo and you will never be unhappy. Quote: Originally Posted by platinum get an apexi powerfc. It's a replacement ECU for skylines that will plug directly into the standard loom, self-learns most things and will run straight out of the box. Under a grand including hand controller. The PowerFC does not self-learn anything at all. It has a base map, so most cars will run once its plugged in, but by no means does it learn/self tune or anything associated. It must be tuned on a dyno like any other ECU Quote: Originally Posted by evl_25t thanks thats exactly what im after so i should definetly get rid of the rb25det turbo or will it be ok for a while on around 14 psi or is that to much for it should i put a to4e turbo on or is there a better suited turbo ? im not after a drag weapon just a bit more power it what do you guys think.... 14psi is BAD for the ceramic turbos. I wouldnt take it to around 10-11psi only to be safe. Some original photos have not been recovered yet.

Quote: Originally Posted by R31Nismoid PowerFC and a GCG hi-flow turbo is what you want, 250rwkw with response almost identical to the factory turbo, just with another 70rwkw on tap and heaps more mid-rangs. Wolf + a t04 is like going back in time if you ask me. Why put 1970's turbos on there, they are pointless. Give the RB25 the benefit of a decent turbo and you will never be unhappy. The PowerFC does not self-learn anything at all. It has a base map, so most cars will run once its plugged in, but by no means does it learn/self tune or anything associated. It must be tuned on a dyno like any other ECU 14psi is BAD for the ceramic turbos. I wouldnt take it to around 10-11psi only to be safe. Ok well im lookin to run about 14-15 psi so i guess the turbos gotta go after looking at a few skyline web sites they were talking about removing the ceramic wheel and replacing it is this possible and is it worth it and what about highflowing the standard turbo or should i just turf it and get a bigger one but i dont know what would be best suited to my standard manifold etc thanks Some original photos have not been recovered yet.

Don't buy a to4e, get your standard turbo high flowed. A highflowed rb25det t3 (ball bearing) is actually a tough little street turbo and will give you good power and great response compared to the dinosaur t04e. Call GCG they quoted me $1050 exchange from memory for a highflow ball bearing rb25det turbo.

Quote: Originally Posted by ATMO_BT1 Don't buy a to4e, get your standard turbo high flowed. A highflowed rb25det t3 (ball bearing) is actually a tough little street turbo and will give you good power and great response compared to the dinosaur t04e. Call GCG they quoted me $1050 exchange from memory for a highflow ball bearing rb25det turbo. Cool sounds like the way to go so it should be good for 14-15 psi and will bolt straight on to my manifold thanks

yes it will bolt onto everything and will be good for more than 15psi man!

Quote: Originally Posted by ATMO_BT1 Call GCG they quoted me $1050 exchange from memory for a highflow ball bearing rb25det turbo. Your memory is pretty bad They cost just a little more than 1k for the ball bearing unit. http://www.gcg.com.au/Catalogue_Menu...grade_gtst.htm (http://www.gcg.com.au/Catalogue_Menus/Upgrade%20Turbochargers/upgrade_gtst.htm) Some original photos have not been recovered yet.

no no, i said exchange, as in you give them your turbo and they quoted me $1050 on top for the high flow.. as long as your current turbo has no cracked housings etc

Quote: Originally Posted by R31Nismoid The PowerFC does not self-learn anything at all. It has a base map, so most cars will run once its plugged in, but by no means does it learn/self tune or anything associated. It must be tuned on a dyno like any other ECU Well someone better inform apexi then with mine it required idling for 30min so it could setup and learn how to manage the idle correctly, involved turning air-con on/off, etc - all of this is set out in the apexi manuals, etc. Since it uses a base map, it should run just as well as the non-fiddled with factory ECU (and plenty of people run them for ages without touching a dyno) although I would definatly be taking it somewhere for a tune as soon as you have it. Although I'm sure you know all this Some original photos have not been recovered yet.

Thats just setting the idle control and voltages under load etc. Its doesnt do it on its own, as it requires the user to perform certain actions And its more than 30 seconds, its actually a 20 or 30min procedure if i recall the manual correctly Quote: Originally Posted by ATMO_BT1 no no, i said exchange, as in you give them your turbo and they quoted me $1050 on top for the high flow.. as long as your current turbo has no cracked housings etc Turnaround: 2-3 days. Why would a new turbo require a 2-3 day turnaround? Because its not a new turbo, they are rebuilding the one that you send to them. They then send it back to you... which, if you apply even a small amount of lateral through, is the same thing as change-over... There is no way they would pay 1k for a turbo thats worth $400. They are 2k, not 1k for the ball bearing unit. Ring them tomorrow if you think im wrong. Some original photos have not been recovered yet.

Quote: Originally Posted by R31Nismoid Thats just setting the idle control and voltages under load etc. Its doesnt do it on its own, as it requires the user to perform certain actions And its more than 30 seconds, its actually a 20 or 30min procedure if i recall the manual correctly Yeah it's about a 30min proceedure, like i said. And you don't really have to do much, just turn on the aircon really! Some original photos have not been recovered yet.

Out of interest, is your AC wired to the AC request pin on the ecu etc?

Quote: Originally Posted by R31Nismoid Thats just setting the idle control and voltages under load etc. Its doesnt do it on its own, as it requires the user to perform certain actions And its more than 30 seconds, its actually a 20 or 30min procedure if i recall the manual correctly Turnaround: 2-3 days. Why would a new turbo require a 2-3 day turnaround? Because its not a new turbo, they are rebuilding the one that you send to them. They then send it back to you... which, if you apply even a small amount of lateral through, is the same thing as change-over... There is no way they would pay 1k for a turbo thats worth $400. They are 2k, not 1k for the ball bearing unit. Ring them tomorrow if you think im wrong. Maybe they can either rebuild your turbo or do the exhchange, who knows. Jesus mate i was only trying to help the bloke why be so viscious? I didn't make that quote up, that's what they said, i would have nothing to gain by lying! Some original photos have not been recovered yet.

:O I didnt even call you a retard, moron, or even something else slightly more figurative Was mearly informing you that your quote was about as inaccurate as it could get, which certainly isnt helping this poor guy Some original photos have not been recovered yet.