Making Power Safely - Rb25Det

[tripsteady]

Hi Guys

So I'm planning to turn up the boost soon to about 16-18psi with a high flow and supporting mods

Getting a service done, wanted to make sure the engine is built to handle it and will pump out 250rwkw all day every day reliably.

This is what I've changed/am changing for "insurance" and my power goals so far

- full 100k service done , gates racing timing belt

- full fluid flush

- exhaust manifold studs upgraded to toyota ones

- splitfires

- metal intake to turbo

- blitz return flow intercooler

- 3inch exhaust from turbo back , gtr cat

- ebc & gauge

- new vacuum lines(old ones are cracking and brittle)

- new 52mm ASI radiator

- new breather hoses

- new radiator hoses

- new rocker cover gaskets

- walbro 255lph fuel pump

- nismo 550cc injectors

- z32 afm

- craig davies transmission cooler

- mv automatics stage 2 valve body upgrade

- still deciding on tuner/engine management

Only current issues :

- Idle hunting at any temperature, never stalls

- When starting cold , sputters and low revs , needs a push of the pedal to "catch - claned AAC , cold start valve , TB etc...

- Oil Leaking around rocker covers

What are the other weak points of the RB25DET that I should address before I put some serious power through it?

I know many have made 250rwkw easily on an upopened average RB with no issues whatsoever. Just looking for what I can do to ensure reliability without opening her up as this is my daily and I want to put my foot down at any time with full confidence.

Thanks in advance

Cheers

Edited January 31, 2014 by tripsteady

[MatthewT85]

when you say full 100k service i assume you mean waterpump, and the bearings also?

also if youve chaged the rocker cover gasket the oil leak shouldnt be there unless is coming from somewhere else

i guess the choice of ecu will be decided when you decide on tuner

looks like youve done a lot to cover yourself off

[GH05T]

also hte half moon seals and such on the 100k service, not for any sort of safety but may be the leake, also a bitch to do on there own.

have you checked the compression or done a leak down test just to make sure there are no underlying issues with the rough idle/ start?

[gtr jet]

Get it dyno tuned

[tripsteady]

when you say full 100k service i assume you mean waterpump, and the bearings also?

also if youve chaged the rocker cover gasket the oil leak shouldnt be there unless is coming from somewhere else

i guess the choice of ecu will be decided when you decide on tuner

looks like youve done a lot to cover yourself off

Yes 100km service including changing water pump , bearing etc... Ive changed the rocker cover gaskets, but the rocker cover bolt seals were all hard and out of shape.... It was also missing two bolts so Im going to by the gasket again , half moons and bolt seals + bolts. Will then be able to see what else is leaking

also hte half moon seals and such on the 100k service, not for any sort of safety but may be the leake, also a bitch to do on there own.

have you checked the compression or done a leak down test just to make sure there are no underlying issues with the rough idle/ start?

no i havnt actually - thats a good idea, i think i may get a compression test done.

[Ben C34]

I wouldn't worry about a comp test. It will just show up if you are on borrowed time, which technically you are until you do a full rebuild, and it's not like you will do that as a precautionary measure.

Boost it up, hope for best, but to be sure start planning an engine build in the mean time.

[Dose Pipe Sutututu]

why do you always find a need to post the same thing on nissansilvia.com also?

RB25DETs will piss out 250kW at the rears anyday of the week without even breaking a sweat

[tripsteady]

why do you always find a need to post the same thing on nissansilvia.com also?

RB25DETs will piss out 250kW at the rears anyday of the week without even breaking a sweat

ive already answered your question there. Ive also already said, "I know many have made 250rwkw easily on an upopened average RB with no issues whatsoever."

If you don't like my threads then stay out of them. Thanks

[Sinista32]

Nistune & Tune - That's it with the mods you have listed.

You'll be fine on stock over the 300rwkw's mark. (Turbo dependent)

Highflow OP6 will get your 250rwkws. All day every day

(mine does)

[tripsteady]

Nistune & Tune - That's it with the mods you have listed.

You'll be fine on stock over the 300rwkw's mark. (Turbo dependent)

Highflow OP6 will get your 250rwkws. All day every day

(mine does)

Cheers. Shouldnt break a sweat , and I have maintained it as best I could (never boosted above 12, oil change + filter every 5000km etc, always check coolant and oil level . always warm car up and check oil pressure before boosting) so hopefully it shall last me many more thousands of km's