Jump to content
SAU Community

Recommended Posts

I've built a a pair for Chequrered tuning's LS1 V8, that is mainly getting the advantage of running extra timing for the high comp V8. I'm awaiting on the manifold for my GTR, So I don't currently have a result for this particular turbocharger. Are you looking for some thing that suits a Rb20det?

How ever I have do have an result using the exact same compressor and turbine, except been in a VNT housing. You can reference to the ATR43SS4-Alpha model. That would give you an approximate peek power and boost to power ratio.

While I'm in here, I have twin GT-RSs on my RB2630 and the rear wheels are choking it up top, is there an option to fit a bigger turbine wheel ?

Just a quick update. I'm in the process of making a 55mm exhaust wheel for SR20det motor. That is a mm a side bigger then your GTRs turbine all around. I will doing some evaluations ready, they should be the solution for your current issue on the Rb2630 and pickup more mid / top rang torque also.

Haha oops, for some reason I thought they where 11 blade, was thinking of something else :/

How long till you start doing these and what would be a guesstimate of cost to rebuild two turbos with these wheels ?

Grinding shaft at moment, probably two weeks away. If you wish to send me the compressor wheel I can definitely build them with the new exhaust wheel.

Some updates. Those are videos sent in by John Reco, fastest lap SAU VIC track day last week. Fastest lap:

fronts.jpg
Hypergear 21U highflow turbo on standard manifold
Havoc custom pipework and exhaust
Chequred Tuning 300kw responsive tune E85
Motul Fluids 8100 15w50, Comp Gear Oil & RBF600
Tyrepower Frankston wheel alignment
4.3 Diff gears
285/30 R18 Yokohama Neova AD08R

  • Like 1

Should be able to customize turbine housings. Depending on what sort of car it is for.

comps.jpg

Further development into the ATR28SS Alpha Series based my S14 with a SR20det motor using BC S2 cams.

This is a base line for CBB SS2 Alpha version, Vnt is not current engaged. Final result of 302rwkws on 24psi P98 fuel.

power.jpg

boost.jpg

SS2 Alpha Base line compare to Standard SS2:

ss2vspower.jpg

Makes the same amount of power, but is slightly more responsive.

ss2vsboost.jpg

Base line Vs Garrett GT2871R in .64 rear:

powerv2871.jpg

boostv2871.jpg

Its currently making 190rwkws and 21psi @ 4000RPM. It drives pretty good the way it is. The goal would be matching the GT2871 curve without losing any top end.

  • 2 weeks later...

So I am helping someone make their RB25 Skyline go a bit quicker, so after much discussion the choice to go with an ATR43-SS2 was made - as soon as we nut out how to best pay across international borders we may have the first Hypergear turbo on NZ soil that I am aware of. Looking forward to checking one of these things out in person after all the discussion, and will be nice to have first hand experience of the SS2 :)

If I'm allowed I'll post results after we are done with it - will be internally gated, stock manifolds all around, BP98 on a stock internal RB25.

  • Like 1

Firstly sorry for being lazy. But what is the best direct bolt in turbo for an R33 gts on E85 shooting for around 400rwhp with as much response as poss. Or is it worth going external gate and or big dump?

Depending on how lenient the dyno is he will be getting about 340-370 hp around there, varies alot with dyno's.

Thats at 16-20 psi

I'll be tuning the internally gated one on BP98 with a Dynapack hub dyno, probably not as tough an audience as you guys are overall used to - though similar to some. Will probably go for around 18psi, but will see how knock limited it is and decide whether to go higher from there.

SS1PU Internal Gate will do it, I personally prefer to run an external gate because you can sneak in more timing

Thanks

Is the ATR43ss2 a lot bigger or ok for what I'm looking at? Don't mind going external gate, prob off exhaust housing.

This is for a track car.

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

    • Hows your intake piping? Are you still running stock? Having in the stock AFM position would mean, if the BOV was shut/venting out, it'd create the almost stalling kind of effect right // "the rich pulse behaviour" due to MAF thinking air is flowing ? But this would be better than having the bov in the stock position + MAF on/just before cross over piping right?
    • Essentially, yes. Although I wouldn't put the AFM on the crossover pipe. I'd want to put it into what amounts to the correct size tube, which is more easily done in the intercooler pipework. I bought a mount tube for card stile AFM that replaces the stock AFM - although being a cheap AliExpress knockoff, it had not flange and I had to make and weld my own. But it is the same length and diameter as the stock RB AFM, goes on my airbox, etc etc. I don't have a sick enough rig to warrant anything different, and the swap will take 5 minutes (when I finally get around to it and the injectors & the dyno tune).
    • So to summarise, the best thing to do is to move recirc to between turbo and IC, and maf on the crossover pipe. Meaning I'd need a recirc flange, drill a hole in the piping on turbo outlet area. And drill hole on crossover to fit/weld maf sensor? Either that or put the MAF on the turbo inlet right?  Is an aftermarket recirc/blowoff valve recommended? Do currently have family in Japan so could probably bring something back with maybe a cheeky lil SuperAutobacs run?
    • Yep, so far most have said that it looks like corrosion on the wall from piston not moving. Which then has probably damaged the oil rings and caused those vertical marks. The longest the engine was still after the rebuild, was the winter of 2018 - 2019, plus the boat trip to Japan. When I shipped the car, it had normal gas in the tank but before that winter pause, it had E85 in tank.  In any case, even if either one of those was the cause, it happened close to 6 years ago and the car has been driven something like 30 000kms after the fact. Again, apart from the plugs and the dip stick, there is nothing in the way the car runs that would indicate what has been going on in the engine. I am going to consult a shop and ask their opinion, what would be the best approach. I do have some access to a garage I could use to diagnose further myself, but time is very restrictive. Might end up buying another engine that could be used while this one is being remedied. Without pulling the head, it will be impossible to find out if it needs another bore, but here's to hoping a hone would suffice.  Goddamnit, I would really have preferred this not happening.  
    • Boot is going to be replaced eventually. I just wire brushed what I could and rust converted. Then painted in rust kill primer. the spoiler also got repainted and plugs replaced on the ends. The under side of the bonnet is going to be black also, currently white. But red on the top side, same colour code as the silo to begin.
×
×
  • Create New...