anyone know what size standard r33 gtr turbo,s are, are they any bigger/ better than standard 300 ones. thanks

wellt he GTR turbos are both different sizes, twin turbo but they are sequential, little one and a big one - so not much use for a 300zx :) Also remember that the 'liner is an RB engined car, so a straight 6 not a v6, so even if you could get a pair of matching large turbos they would be neigh on impossible to fit :)

odd was looking at a pair tonight and they looked to be the same will have to double check tomorrow, is there much difference in size between them normaly

Actually, i was just having a think, i might be tihnking of a supra? That might be sequential turbo and the 'liner might be two equal size turbos. Im going to hvave to research it!

 

Either way, im sure you need a left and a right turbo for a VG motor, where as youd have two of the same (f they were the same) on an RB motor

Yup... im an idiot... taken from wiki...

 

The engine also uses a parallel twin turbo system. The turbo system is arranged so that the front turbo is powered by the front 3 cylinders, and the rear turbo is powered by the rear 3 cylinders. The turbo chargers are of equal size, and are set by the wastegates to limit boost pressure to 14.7 psi, although the Skyline GT-R has a built in boost restrictor to keep boost under 10 psi.

 

Sorry i'll sit in the corner and be quiet LOL

thanks quavey thought i was going daft for a minute there,and turbo,s on the vg engine are not sided they are both the same think the compressor houseing is set at different angles though.

as far as im aware, they have t3 mounting flanges, just like the GTS, so wont bea bolt on affair, and they flow enough for 400 bhp, so no really a worthwhile upgrade, unless you can get some N1 stell turbos, which are good for 600bhp apparently :)

just been looking on skyline forums and from what i can find on there standard turbo's are t25's and are capable of over 500bhp can anyone here confirm this.

I don't think there is any real advantage to putting on skyline tubs, once you have factored in the machining/agro you may as well have gone for uprated turbos!

I don't think there is any real advantage to putting on skyline tubs, once you have factored in the machining/agro you may as well have gone for uprated turbos!

 

getting these very cheap and im an engineer by trade so fitting isnt a problem, just need to find out what size thy are for deffinate and power capabilities

I think usually when they do bolt on mods on the skyminicab, they equal about 350-400bhp, have not heard of 500bhp being made with stock turbos?

The GTR turbos are gt28 and have ceramic blades which fall apart at aroung a bar of boost thats why they are limited. Most higher power Skylines which use the the same tubs opt for steel internals

 

T28 sorry got mixed up.

Edited October 18, 200817 yr by GIBSTER-TT

IIRC GTs are BB turbos and I don't think they are ball bearing?

R33 Turbos are T25

 

R33 GTR Turbos

compressor housing - A/R 0.42 with 50 trim wheel

Turbine Housing - A/R 0.48 with 62 trim wheel

 

Im pretty sure its the GTS that has T3 flange, and its only the R34 that has Ceramic blades and is a GT25

 

A lot of work for no gain, you might gain an extra 20hp compared to the Stock 300zx T25/T22 hybrids. If your going to pull engine and replace turbos you may as well make the most of it.

Edited October 18, 200817 yr by Yowser

The r33 has a ceramic exhaust wheel, and if your very unlucky, the plastic compressor wheel :shock:

 

Nissan mixed and matched the combos throughout the range with no way of knowing what turbo was what.

 

Some were all steel from the factory, but these were few and far between.

 

And ivenever heard 500 bhp from the standard turbos, the N1's yes, but standard ones no :nono:

thanks legrath engines out anyway and its realy only time for fitting , turbo's basicaly free just got to help mate strip car for spares.

 

And ivenever heard 500 bhp from the standard turbos, the N1's yes, but standard ones no :nono:

 

been checking round skyline forums and there's a few caiming that kind of power with dyno sheets to prove it. i know myself that a standard t25 is capable of about 220/230 bhp max and standard t28 being around the 300 bhp iirc.

my info came straight from a skyline tuner, :smash:

Not just someone with claims, he was saying the RELIABLE limit is a fraction over 400 bhp on the standard turbos, after that, heat, and all those other nasties start to raise thier head.

And not all T28's were created equal :smash:

ruishy1 just going by info i can find mate i know the t28's fitted to the 200sx and the pulsar gtr are different and skyline forums state standard turbo's as being t25's, wil find out for sure when i get tubby's off next weekend and measure everything up.

if your going to the hassle, get T28's from a 200sx S14. circa 300 bhp from each turbo, and you can get good ones for 150 quid each :duffer:

if your going to the hassle, get T28's from a 200sx S14. circa 300 bhp from each turbo, and you can get good ones for 150 quid each :duffer:

 

£300 is 1 a lot of beers, 2 about 15 hours of my time to earn it. also wouldnt buy second hand tubs without being able to inspect them first, so if these turn out to be of no use i will be saving the pennies for spanking new ones, probably some version of the t28 but with ball bearings etc.

Im by no means an expert at this but, does the fact that the Z has a 3 litre engine and the liner has a 2.6 litre engine not have any affect on this. I would have thought that the Z would produce less lag. and if the skyline runs each turbo through 3 cylinders, like the Z, will the skyline turbos be able to hold the higher boost through the whole rev range, with the bigger capacity engine of the Z.

Like i say, i only know what read. so these questions are probably stupid, but i was once told that the only stupid question is the ones you dont ask.

cheers

danny

theoreticaly because the 3 lite engine pumps out slightly more gas at any given rpm you should get slightly less lag and slightly higher boost but it also depends on on the turbo impellor and compressor sizes as well.

It is impossible to compare the two engines but there is no doubt the rb is a very potent engine, and lets not open that can of worms :)

 

There are people that have done this before and have turned around at the end and said it is not worth it, but if your turbos are knacked, the turbos are cheap and you like a challenge go ahead?

http://www.300zx.co.nz/phpBB2/viewtopic.php?t=3325&postdays=0&postorder=asc&start=0

I think a lot of improvement there is the exhaust manifolds more than the turbos.