Jump to content
SAU Community

Recommended Posts

On different setups, I ran the GTX2860's with the stock anti surge front housings with welded on flanges in my 2.8. In short they come on boost later than a 2860-5. They are quieter though

he modified the gtx housings to fit the Gtr

Yes married Thursday

I'M back again with more news... mechanic told me my oil seal is leaking and if i dont change it, turbos will need rebuild. Since I'm not doing any mechanic on my car, i thought.. if im going to pay labour $ to have my seal/gasket redone, I might as well check my turbo and swap them with brand new turbos to recover optimal performance of the car.

I found out about a company called Pure turbos..

They ask 1100$ to have both turbos rebuilt with new brass cage and new billet wheel. ( they say it will be as good as brand new turbos , if not better due to brass cage and billet wheel)

Now heres where i need your help... they offer me a 60mm billet wheel which should yeild a 40hp/per turbo upgrade ( probably taken from the gtx2860's figure) and a 63mm which would yeild 80hp/per turbo. They say turbo spool shouldn't be noticeable and if it was their engine, they would go 63mm.

I'm scared the 63mm will actually be too laggy and i have doubt about their claims on spool. if I had 2.8 stroker.. it would be a different story, but I'm only on a rb26 with 86.5mm.

What front compressor housing are you using, normal -5 or surge slotted? You will be more at risk of compressor surge with a bigger compressor wheel.

-5s housing !

Considering you only wanted 500-550 Whp, it's a not brainer. 60 MM wheel!

I also feel the same.. but you know.. if the lag is going to be 200ish rpm and your gaining an extra 40hp/turbo.. it's interesting lol.

200 rpm is heaps!!!!

Very true, people don't seem to understand what a few hundred rpm can do to a car...

My T88 on dyno was only 500rpm (ish) slower to get 15psi on the dyno compared to the 6262, on the road/track it went from being horribly laggy to very responsive

  • Like 1

^^ *like*.

Micko's old man changed his exhaust and went back to a stock airbox on his GTR. Overlay the graphs and it was 200 rpm everywhere. TOTALLY different car to drive. It went from a car which did nothing under 5000 rpm to be able to drive it quickly quite easily.

60mm. Do it. Don't forget you have a 2.6 too. A bigger engine you'd get away with it.

  • Like 1

Some open pods. Mmmm all that yummy hot air!

It was a 33 though. Different design to a 32 box.

I know I'd make more power going back to an air box but I'd never thought about earlier spool as I wouldn't have thought it would have made a difference.

I'm pretty sure I'd still be fine with a standard box at 325kw.

The whole shebang coming on earlier was more to do with sorting the pos "jap" exhaust out. Getting rid of the rubbish restrictive mufflers and mismatched pipes. Going back to the airbox was just something he did at the same time.

  • Like 2

Yep picked up 15-20kw throughout the midrange to redline. Was a night and day difference really was much nicer to drive and also made power feel more progressive not just a BANG & it was alive at 5000rpm :)

Very true, people don't seem to understand what a few hundred rpm can do to a car...

My T88 on dyno was only 500rpm (ish) slower to get 15psi on the dyno compared to the 6262, on the road/track it went from being horribly laggy to very responsive

There are times I've seen NO difference in spool on the dyno and still a very noticeable difference in practical use - dynos can be quite misleading at times!

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now



  • Similar Content

  • Latest Posts

    • Could be falling edge/rising edge is set wrong. Are you getting sync errors?
    • On BMWs what I do because I'm more confident that I can't instantly crush the pinch welds and do thousands of USD in chassis damage is use a set of rubber jacking pads designed to protect the chassis/plastic adapter and raise a corner of the car, place the aforementioned 2x12 inch wooden planks under a tire, drop the car, then this normally gives me enough clearance to get to the front central jack point. If you don't need it to be a ramp it only needs to be 1-1.5 feet long. On my R33 I do not trust the pinch welds to tolerate any of this so I drive up on the ramps. Before then when I had to get a new floor jack that no longer cleared the front lip I removed it to get enough clearance to put the jack under it. Once you're on the ramps once you simply never let the car down to the ground. It lives on the ramps or on jack stands.
    • Nah. You need 2x taps for anything that you cannot pass the tap all the way through. And even then, there's a point in response to the above which I will come back to. The 2x taps are 1x tapered for starting, and 1x plug tap for working to the bottom of blind holes. That block's port is effectively a blind hole from the perspective of the tap. The tapered tap/tapered thread response. You don't ever leave a female hole tapered. They are supposed to be parallel, hence the wide section of a tapered tap being parallel, the existince of plug taps, etc. The male is tapered so that it will eventually get too fat for the female thread, and yes, there is some risk if the tapped length of the female hole doesn't offer enough threads, that it will not lock up very nicely. But you can always buzz off the extra length on the male thread, and the tape is very good at adding bulk to the joint.
    • Nice....looking forward to that update
    • Neg, the top one is actually for the front. The sizes are 18x10.5 +18 and 18x11 +32.   I measured many times but I'm sure I'll have problems as this is the thread for problems.
×
×
  • Create New...