Jump to content
SAU Community

Recommended Posts

I should have been here 2 weeks ago missing by 0.89kws. lol

Here it is, with blessing of Queen Elizabeth plus emu and kangaroo screaming (jks, had 50c Coin welded to my wastegate port).

coin.JPG

My car stopped making power at 431rwkws. Using Hypergear ATR43 G4 roller bearing turbocharger.

atr45power.jpg

atr45boost.jpg

The red line was from the latest roller bearing ATR43G3 that was used for dyno scaling. please ignore it.

Factory engine with forged pistons (9:1), stronger valve springs. Stock cams, factory inlet manifold.

Run was based on E85 fuel, high mount manifold, 50mm gate. (No need for big cams to crack 400rwkws, just need a huge turbo).

  • 2 months later...
  • 2 weeks later...
  • 3 weeks later...

Can finally post in here:

Forged rb26 bottom end

Stock cams/springs/head

Precision 6266 .84 T4 divided

50mm GFB external gate

3.5" dump/cat/cat back

1200cc injectors with walbro e85 pump

409kw @ 26psi on e85

Stock cams have nothing else to give and fuel system maxed too

Forgot about this thread. Time for a little update;

New setup;

GT Block
Tomei 2.8 (87 mm pistons with Titanium top ring)

9.0:1 compression ratio
260 at 10.85 mm cams. (custom grind with a much more aggressive ramp rate than a typical "Jap" cam.)

Full effort HKS/NAPREC head. (1.5mm OS valves, NAPREC CNC machining, intake squish pad removed, decked 1 mm)

Ported manifolds (to head and turbine housing)

ID 2000 cc injectors

Twin 044 feed pumps and single 044 lift pump

Nismo 0.9 mm head gasket
Nismo Plenum
Nismo intercooler
Tomei series 1 dumps (72 mm internal diameter)
Garrett -5's with ported turbine housings
Racepace motorsport twin 3 inch exhaust
Blackbox ECU (Built in conjunction with Unigroup Engineering. This ECU is yet to be released for GTR's)
Ethanol flex fuel setup
Ross Tuffbond crank trigger. (Timing is no longer taken from the CAS)
Stock airbox with a $10 paper filter in it.
United E85

Modified turbo intake pipes



Made 472 RWKW with the EBC on (highest was 474). Peaks at about 28 or so then trails back to 25.5 ish top end. With the EBC off (20- 21 PSI) it made 441 RWKW. Tuning for very strong midrange midrange more than anything. On PULP it made a an easy 425 rwkw at 22 PSI IIRC

972FDE76-81E2-40D4-9009-FED29B987CB8-174

Can finally post in here:

Forged rb26 bottom end

Stock cams/springs/head

Precision 6266 .84 T4 divided

50mm GFB external gate

3.5" dump/cat/cat back

1200cc injectors with walbro e85 pump

409kw @ 26psi on e85

Stock cams have nothing else to give and fuel system maxed too

Fuel system shouldn't be maxxed at that power? Pump getting full voltage?

Edited by SimonR32

Injectors were running out sooner so we had to bump up the base fuel pressure to 55psi.....

Needs 2000cc injectors and another intank pump at a minimum..... Plus cams

What cams would be recommended for my setup??

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

    • I don't know any details, but I really wouldn't be surprised if they do it as a LHD only version, at least initially.
    • Thanks for the replies everyone. Definitely a coolant push. Oil catch can is empty and always has been. As the engine is out now I'll be having a good look over things. I do have some detonation on the piston tops from a trigger issue back about 5 years ago. I felt it and shut off then bought a new ecu and changed the trigger. Never been an issue since. It never hurt the power, its made almost 80hp more since that incident but I will pull the bearing caps to take a look. If the bearings are damaged I will do a bottom end refresh. Head is being re conditioned at the moment and the block will be cleaned and checked to ensure it's flat. I'll go with a kameari gasket and see how it ends up. The other thing I'm not super keen on is the cylinder colours. I suspect this is from the inlet manifold. The plan will be to put it back together, retune and then stick a plazmaman billet inlet on it and retune. I'm happy with the power, if it makes a little more, then great, but I would rather just make everything more efficient at this stage.
    • Maybe they'll look to do a bunch of presales to help inject some cash fast for their financial issues...
    • Does it also misfire equally when revving?   Josh is very correct in what you should do. The coilpack harness wiring loom itself is a known problem due to its age and the number of heat cycles it has gone through. Throwing parts at a vehicle to diagnose the issue isn't a smart or good way to do it. Secondly, you may have a bad coil pack, you pop replacements in, they fix that issue, but messing with the harness breaks it, so the issue persists. So now you think "well it wasn't the coil packs" and have to continue chasing your tail, potentially swapping back in your shit coil packs and returning the good ones (yes, I've seen people do this because 'it wasn't the problem' and they want to save money). And suddenly, you've got two issues with the same symptoms...   Diagnose, don't use the spare parts shotgun.
    • Well the articals keep saying a Q50s (Skyline in Japan) with a new Manual gearbox. I like the talk about the new looks with the round tail lights. I hope they bring back the retro look like they did with the Z
×
×
  • Create New...