Time for a rebuild

[Cubes]

Well Matt I'm not going to say cya yet because your not going

I know what you need. You need to drive that beast of a sigma more and starve your self for 2 months or so without a drive of the 33.

[Cubes]

Matt.. I was thinking.

Could you see your self with 250-300rwkw and a .........

.........GTR?

The 4 wheels trying hard to grab traction in second with your eyes being sucked back in to your skull. :uh-huh:

Matt. Watch..

http://www.japanesemotorsport.com.au/46rot...tor2003Kier.mpg

[MattR]

And while your at the JMS website you can check out the run with my car:D

[Nightcrawler]

and a nice run it is too MattR

[MattR]

Gee Thanks, only one bad thing; it wasent me behind the wheel. That will happen on the 31st though

[Nightcrawler]

hehe lets hope you can break the 14's voodoo (and get some traction to boot!)

[MattR]

You know where you can go:) If I cant beat 14's there must be something wrong. Traction may be a problem, anyone know what preasure I should run in my 540s. I was thinking bout 20psi cold

[grepin]

I mainly wanted to get on here so I receive updates.

Without looking back through the threads I presume the rebuild is happening at RPM. I spoke with a guy recently at the Morpowa day regards his car at RPM having the exact same thing done due to ring land problems. I dont want to spark any Microtech vs PFC debates however I cant help but wonder if the knock sensing abilities of the PFC might have saved you.

[whatsisname]

Yep Greg, RPM are doing the rebuild. And yes 3 x RB25DET rebuilds in recent mths (all due to similiar failures). RPM was chosen by the respective owners to carry out the rebuilds. Not because they (RPM) were responsible for them! Just wanted to make that VERY clear to all

The PFC has not saved some from the same fate I know of 3 PFC equiped GTS25t's that have had failures of the same kind. In fact one of the WA guys on SAU (who's running a PFC) had a rebuild recently for the exact same thing.

Not being familiar with the PFC knock detection, I guess it comes down to how quickly the driver reacts to the warning? For example, how quickly would the damage be done @ 7000rpm in 4th? It wouldn't take much to cause a failure under those conditions. By the time the knock detection had giving a warning, & you'd noticed it (I'm usually focused on the road/track doing 7k+ in 4th), the damage is done. But like I said above, I'm not familiar with the PFC knock detection. It uses the engine check light to flash its warning, yes?

[whatsisname]

I just remembered which forum member had the GTS25t, running a PFC, that let go just like mine. Killer T

Have a read of my posts in the later part of this thread! http://www.skylinesaustralia.com/forums/sh...ghlight=rebuild

I had a strange feeling that things were going to go wheels up on me! Nothing was wrong with my car/engine at the time, nothing at all. I always seem to be a step ahead of myself Wish I could put that to good use somehow?

[Cubes]

Hrmm. Interesting thread.. Nice torque curve also.. I have never seen such a flat curve.

[TIMMMAYYY]

I reckon they ar rob.. But generally a lot of Rb owners thrash them off their tits also (not saying anyone here has done that and thats caused their problems).

[hippy]

well knock detection is a good way of protecting the engine correct?? is it possible to get knock detectors which can alarm us??

[whatsisname]

Rob,

Not all of them were making large power. One was from a suspected bad batch of fuel. Another was on the dyno (had gone from ~160rwkw to ~220rwkw via a new ECU, + other mod's) when it let go.

I wouldn't be too concerned about failure @ the 160rwkw mark mate. As per usual, it's all in the tuning. The more safety margin in the tune, the less likely your are to have a failure. I'd say that @ 250+rwkw with standard internals, you need a safety margin.

Another important point - If running stock injectors @ higher than stock fuel pressure, make sure that the fuel pressure is VERY stable, i.e make sure your fuel pressure reg does a very good job regardless of temp's. Its all too easy for the pressure to drop slightly & if the A/FR has been set-up so there's only a small safety margin then that pressure drop is enough to cause an unwanted BANG!

Knock detection is certainly a v/good idea. Knock detection that retards timing the millisecond it detects it! Knock detection that gives you a warning you have most likely already damaged your engine isn't much good.

And finally, remember we are talking about engines that usually have a few k's on them (sometimes hard driven with mimimal maintenance).

[Cubes]

I poped through RPM today and Matt..

Your car still looks as clean as ever.

Those tyres look damn nice.

How on earth could you consider selling it. It has to be the nicest R33 I've seen.

Tim was telling me that microtech soon are releasing a L16 I think he said that has the provision for knock detection, speed input hence traction control etc..

Sounds good.

Matt, I remember reading your going for 300rwkw. Are you sticking with the same turbo?

[whatsisname]

Thanks for the kind words mate Trust me when I say I'm not the one who has considered selling it! If it was up to me (& me alone) it wouldn't be going anywhere

If, in the very unlikely event, I do manage to keep it then I'll see how much more the current turbo has got in it? I'll aim at running ~18psi on the new motor, depending on how the injector/fuel rail issue goes. As part of the rebuild I'm hoping to get larger injectors & a custom fuel rail (IF it doesn't blow the cost out too much) Why? Well I'd like to get to use the car to full potential for a few months before selling

Knock detection with timing retard & traction control would be very nice features to have.

[Cubes]

Rob have you tried Mobil Synergy 8000?

I found it to give me a bit more of a punch when first coming on to boost.

[GTR King]

One bit of advice, run it in properly. Load it up by full throttle up hills but DONT rev it out for at least 1000 kms. Other wise u will hurt the engine and it wont perform as good as it should. Dont put addatives in the oil such as Slick 50. Do it right and u will have a great motor , i know its tempting to give it a REV but just go easy for a bit and it will last u alot longer.

Hey u wanna swap it for my car :]

[Cubes]

I was considering running in my new motor without the turbo bolted on.

Matt your going have to drive it a little more otherwise its going to take 6 months to a year to run it in

[Freebaggin]

Joel, what new motor? I must have missed that.