-7/9s Or -5s Garretts

[r32-25t]

Because previously garret were not allowed to sell Gtr bolt in turbos due to and agreement with hks, but the time on the agreement lapsed and garret were free to release what ever they liked

[GTRsean]

Is there any truth to the fact that the HKS turbos use a steel bearing race vs the Garrets using plastic?

I'm modding up a pair of -5 garrett's at the moment, bought a lathe and measured up the stock nylon bearing cages.

Made some new cages from brass rod (there are different grades) and after a few attempts finally got 4 ready to go.

In the process of pulling the turbo's I'm going to use apart, fit the cages and fit to my car

Quite a fiddly and precise job!

[r32-25t]

Sean you have to much time on your hands, time to move back to sydney and hang out with all of us again

[Pezhead]

Nice work there Sean. I'll be quite interested to see how you go.

[usmair]

If your talking about the car I think you are, it went in another dyno and made 312kw

if this is in reference to my car's run at unigroup dyno day, there are a few factors that contributed to the low reading

1. it was boiling hot! the 370ish that was made was in winter on a cold night compared to a 38 degree day. Even Yavuz mentioned that the car's he tuned were making 10-15kw less

2. the aftermarket BOVs were stuffed and were causing a boost leak, which Yavuz could hear as well.

I ran 11.7 @ 118mph with leaking bovs too actually so there was def a drop in power

I took it back to powertune a few days later and it made 330kw with the same problem

the BOVs have now been fixed (currently has no BOVs actually)

last dyno run was around 355kw mark which as mentioned above seems to be the limit of -9s

I want to put new BOVs back on soon and see if i I can get back to that magical 370kw it once made... will need perfect conditions i would have thought

[hazjaz]

if this is in reference to my car's run at unigroup dyno day, there are a few factors that contributed to the low reading

1. it was boiling hot! the 370ish that was made was in winter on a cold night compared to a 38 degree day. Even Yavuz mentioned that the car's he tuned were making 10-15kw less

2. the aftermarket BOVs were stuffed and were causing a boost leak, which Yavuz could hear as well.

I ran 11.7 @ 118mph with leaking bovs too actually so there was def a drop in power

I took it back to powertune a few days later and it made 330kw with the same problem

the BOVs have now been fixed (currently has no BOVs actually)

last dyno run was around 355kw mark which as mentioned above seems to be the limit of -9s

I want to put new BOVs back on soon and see if i I can get back to that magical 370kw it once made... will need perfect conditions i would have thought

Very nice power figures for -9s. Do you have a build thread?

[levinboy]

if this is in reference to my car's run at unigroup dyno day, there are a few factors that contributed to the low reading

1. it was boiling hot! the 370ish that was made was in winter on a cold night compared to a 38 degree day. Even Yavuz mentioned that the car's he tuned were making 10-15kw less

2. the aftermarket BOVs were stuffed and were causing a boost leak, which Yavuz could hear as well.

I ran 11.7 @ 118mph with leaking bovs too actually so there was def a drop in power

I took it back to powertune a few days later and it made 330kw with the same problem

the BOVs have now been fixed (currently has no BOVs actually)

last dyno run was around 355kw mark which as mentioned above seems to be the limit of -9s

I want to put new BOVs back on soon and see if i I can get back to that magical 370kw it once made... will need perfect conditions i would have thought

Is that E85??

I'm making 350kw -9s on 98 I maybe going to e85 this year and see what they can push

[R31Nismoid]

Probably find you won't make anymore Nick, guessing yours are falling over above 7000-7500rpm like everyone else in the boost/airflow department?

What you will get though is midrange. You can jam more boost in the mid range... That said I was running 23-24psi @ about 4000rpm on 98 that then fell back to 17-18psi (as turbos ran outta flow) over 7000rpm.

[SiR_RB]

My mate made 365kw at unigroup with -9 on e85 stock engine 23psi afew weeks ago

R34 gtr

[Marko R1]

I hear more and more about Unigroup, they have really grown their customer base over the past few yrs

[levinboy]

Probably find you won't make anymore Nick, guessing yours are falling over above 7000-7500rpm like everyone else in the boost/airflow department?

What you will get though is midrange. You can jam more boost in the mid range... That said I was running 23-24psi @ about 4000rpm on 98 that then fell back to 17-18psi (as turbos ran outta flow) over 7000rpm.

Thats what i was thinking Ash, Thats right they do start to fall over there, half the time on track im shifting at 7000-7500 as they do run out of puff in the higher rpms

A fatter midrange on track would be good and all the cooling benefits of e85 blah blah lol

[R31Nismoid]

That's it!

I'd usually shift around 7500 too, just no puff left in the ole -9s. Still a power range of 3500rpm-7500rpm is more than enough really.

[gtr jet]

I run -7's on E85 and find the same thing. After 7000rpm they start to die in the ass but there is plenty of midrange.

I'm making around 20psi at 4000rpm or so.

[Piggaz]

You'd almost sell your soul for more midrange twist .

[Mr GTR-32]

Hi there has anyone had any experience with using water methanol injection setup.

I have heard some great power gains with these kits but I'm after hard evidence before I consider installing one to my GTR.

I'm running -9s on 98 Ron making 340RWKW.

Any info would be greatly appreciated.

Cheers,

Dave.

[Marko R1]

My mate has it on his skyline, I'll ask him to chime in

[wolverine]

Hi there has anyone had any experience with using water methanol injection setup.

I have heard some great power gains with these kits but I'm after hard evidence before I consider installing one to my GTR.

I'm running -9s on 98 Ron making 340RWKW.

Any info would be greatly appreciated.

Cheers,

Dave.

http://www.skylinesaustralia.com/forums/topic/396164-lets-talk-water-meth-injection/

[XGTRX]

Waste of time revving 7s or 9s passed 7000....turbos are out of their range with a 26. At 7000 to 7500 5s are the way to go.

[usmair]

Is that E85??

I'm making 350kw -9s on 98 I maybe going to e85 this year and see what they can push

yes, mine is on e85, however my motor is stock.... only work apart from injectors is a metal headgasket, stock cams and head are probably holding back some power.

[harks]

having read this thread in its entirety over the last 24 hours.. i have a few comments.

firstly: people need to fking read a thread if they are going to post on it.. there must have been 30 times the question is asked "are GT-SS the same as -9's" when it was answered 8 pages earlier..

secondly: its close minded to beleive that just because all you want is instant response in a car and that someone else is dumb for not agreeing with you, or will regret not going that option down the track. people are different. peoples tastes are different. and its their right to decide what they like.. maybe it hasnt occured some that there are people who own a fast car who enjoy the rush when boost kicks in hard at 4.5-5k and they want that in their daily, because thats what they like. And they're prepared to put up with a bit of unresponsiveness. Its their prerogative to do so.

further; by saying "that setup is just going to get you to lose your license" is not exaclty a valid argument. so will doing 60 in a 50 zone, if you get caught enough times. pretty well every car on the road has the capacity to have you lose your license if you drive like a tool. Maybe the owner takes the freeway home from work and hauls ass up to 100 in second on the on ramp, and thats how he deals with the stress of life. who knows.

rant over.

im still undecided between -9s and -5s for my turbo replacement, after my tune with r32 N1s which are very lazy (max boost around 5k) they need to go! and i figure since im used to them taking their sweet ass time to come on perhaps -5s are the go for future upgradability higher top end and bearable lag. it just seems to me that there needs to be a set to bridge the -5/-9 gap..

on a side note has anyone ever used twin 2860rs's? their flow map looks like it has a more usable spread then the -5's with slightly lower peak flow.

Dan