GTRgeoff

Yeah, I still have trouble rationalising it, but as I said in a different thread some time ago, in fluid dynamics strange things can happen. The source of my info said it was possibly 1/3 that do it for 26's (that actually fail in the turbine). He does a lot of GTR stuff and is somewhat of a guru so I tend to be a little more believing of his experiences. How's me for making the engine failure thread work though???? Just about doing it on my own. (oh stop it hurts)

Is GTRgeoff taken I guess it's ok as it is, 3 skylines....I'm a fan.

Just want 2 TT's mate. No way to debunk theories than to have RWDTT and AWDTT No the GTR is my reward for being a good boy.

What Mik said SK. The moment of inertia (r^2 term) is calculated from the radius of gyration (r^4 from memory, I need to check) so the weight location from the centre of rotation is the killer. I'll post a thorough report with pics when I find what went wrong, but the evidence is pretty indicative of a front "something" going bad as the only common thing there is the front turbo. As I said, I was an unbeliever. Thanks for taking an interest though mate.

Actually it won't. For response you use 2 turbos, for top power, a single as a rule of thumb, not that you can't make big power with the twins properly setup. The issue with the big turbo is the moment of inertia. There is a 3 page thread on it and as senior weapons systems engineer with years on turbocharged mechanical systems and gas turbines I'm comfortable with the theory and application. Basically the inertial difference can be a quarter for a small turbo compared to a similar power spec big turbo, all factors remaining the same due to the power functions influencing the calculation of the moment of inertia. I understand the actual theory but the proponents of the big single theory are yet to provide the fundamental theory for their claims.

Actually the manifolds have been cut and welded then match ported to suit the 25 head. About 2500 for all of the parts not including labour as I did it myself. I'd expect it to come somewhere near 4K as a drive in drive out. I used braided lines and good quality fittings. I know I could do a similar job with a larger single but was impressed by the responsiveness of the car they came out of (Snowman) and wanted the novelty factor as well. It felt great and certainly would have been a bit sharper response wise from no boost than a 26 which has a lower compression ratio. Unfortunately in the first drive something went wrong. I was just taking it onto boost the first time after idling it for an hour checking all connections etc. Had driven gently about 2km to the servo for air in the front tyres, left the servo, into second, clear road so started feeding the throttle. Got up to 5psi when it had a nasty miss kind of noise from the engine and by the time I backed off it had stopped, but was way down on power. I saw a cloud of brownish smoke in the mirror which I thought was fuel. Note that I had installed 440cc injectors as well. Compression is now down to 25psi on 1,2,3 and 125psi on 4,5,6 so well down on all. Discussion and analysis has led to the conclusion that the front turbine has let go, and is quite common on 26 turbos that have been removed and refitted. Whether something wasn't clean on install and came loose striking the turbine, or it was just their time I can't tell. I have to drop the front turbo to take a look. As has been vaguely reported on the forum by others, it appears that when the ceramic turbine lets go it can suck back into the cylinders causing the bores to score and the valves to be held open by the particles. I myself have been a disbeliever of this phenomena but can see no other justifiable reason. The source of a lot of information on this is an identity that Ash would never think to question, even momentarily (a hint). I intend to dismantle and photograph as I go to nail this one for good if it is the causal element. Also note that no blame is placed on Snowie. The turbos were bought and sold in good faith and good condition and could have lasted much longer if they had remained on his car. This is just one of those things associated with the ceramic turbine time bomb.

Only a reference to sump baffle syndrome. Only place in the country it seems to happen is turn 1 at the creek right.

Dunlop 9000SP is the best I've found yet on the track, but a bit squealy so you hear the limit even in a helmet. They replaced the F1 Eagles I had which until the Dunlops where the best I'd found so good choice. Pity we won't see you at Sandown. You will miss an awesome sight. Good luck with the fishing.

Actually a RB25dett, and awaiting loan approval for 95 R33 GTR Vspec with a few baasic things. See it in for sale section....mmmmmm purple.

1. Yep 2. Yep 3. Yep Did the TT thing myself, great fun but complex.

You reading my mind??????

Suddenly Scared of Eastern Creek!!

F*CK OFF!! I'm getting SBS now........ AAAARGGHHHHH

Sorry mine are 0.5mm os. Tried Nissan? take japanese chassis and model codes.

Hell yeah the racepace GTR is what god drives when not towing the caravan Sorry to hear about the tyres. I was looking at some Pirelli 285/18" Porsche Cups today for the GTR, but glad I'm not paying new. I have second hand dealers I go to so about $100 each for slightly used 17"s from Europe. Thanks for the tip on Tint professor. I need to get some done.

So Vuster, hows the car settling in, and will we see you at the next track day (at least for a hello and watch the racing)?

Duncan it appears I'll have a need of this product soon, so I'll let you know when I'm ready to go. I recall that JE thought this couldn't be done at a value for money price as each GTR would require calibration etc etc. How did you clever buggers overcome that?

One of the online traders had one for 350 in stainless............ouch!

Cheers mate. I love em both though.

Hmmmm I've always wanted a GTR33 so this is reward for lots of hard work over the years. (Who said that??? Shut up!! I do deserve it.) It is unlikely to go to the track though. Maybe the Shep day but that'll be it. Anyway, if anyone can burn a 32 to the ground you can. Sooooo, who want's an auto R33???

That's up to 2530r32 to confirm but from my end verbal approval in principal from the CU and they are awaiting our current payslips to confirm regular income. You know how all this works Denton. Just waiting for the nod from them and I can pay the money.

what size and condition

Cheers mate, but the track car will remain the RWD without abs and other aids. Had a long chat to Ben today and he said nothing about Sandown. He did point me toward a possible reason for the 25DETT having problems, but I have to pull it down first. I'll be there to watch him demonstrate why rex's are considered a toy.

Actually Paul it would just give the dyno stuff as it doesn't give 3 letter searches. Try R33 GTR and see what comes back. Mods, can this be adressed as well?