Jump to content
SAU Community

Hks Gt Rs Made 565rwhp........

markr34gtr

By markr34gtr,
in Engines & Forced Induction

 Share

Recommended Posts

Sydneykid Grand Master

Sydneykid

Posted
Posted
SK

Short of a stroker crank, is there anyway of spooling them up a little earlier (i.e. fattening the power curve a little)?

Do you expect that the HKS tubular exhaust manifolds will help with this? Head porting, bigger pipework, lower resistance IC?

5 to 8.5 k rev range is still street/track useable, but fattening it towards the low end will obviously make the car a lot more tractable.

Cheers

Gav

Hi Gav, this is pretty much the same result others around the world have achieved with 2.6/2.7 litres and GTRS's. I didn't tune Mark's car (lucky him) but it is very comparable. Personally, for what I would use the car for, I would have gone to 3.1 litres but for Mark's purposes I reckon it will be great. :rofl:

markr34gtr Experienced

markr34gtr

Posted
  • Author
Posted
Hi Mark, damn good result.  Pretty much what we discussed, they make some boost at ~5,000 rpm, really get into their stride at ~6,000 rpm, make max power at ~7,000 rpm and still have plenty at ~8,000 rpm.  They will be fun on a cool night, as long as it isn't raining.  :wizard:

yes sat night was on the way to the track and it was raining.... not happy....

cool night air it will love.... yes...

wed night will be the test.....

thanks for your input to my build up...

cheers...

  • 5 months later...
600hp Proficient

600hp

Posted
Posted

Thanks for that.

also what was your power before C16, because i would like to try some C16 and i'm wondering what sort of power i might get.

we made 332kw at all four at 21 psi. i would like to see 400 at all four.

would you think that would be possible with the diffences that you saw.

cheers.

  • 3 months later...
Marko R1 Grand Master

Marko R1

Posted
Posted

Hi Mark,

I just picked up my car literally 2 hrs ago :)

Just installed a set of these gtrs's on my r32 gtr, on 15psi it is making 304awkw.

My tuner wants to keep the boost conservative until i upgrade my exhaust from:

'2inch front pipes/3inch cat back'

With my new veilside system:

'2.5inch front pipes/3.5inch cat back'

I can then run 20-25psi depending on what i am after...

Is your bottom end standard?

Marko.

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
 Share
Go to topic listing


  • Similar Content

  • Latest Posts

    • MBS206
      R32 GTS (RB20DE) Injectors Replacement

      By MBS206 · Posted

      If as it's stalling, the fuel pressure rises, it's saying there's less vacuum in the intake manifold. This is pretty typical of an engine that is slowing down.   While typically is agree it sounds fuel related, it really sounds fuel/air mixture related. Since the whole system has been refurbished, including injectors, pump, etc, it's likely we've altered how well the system is delivering fuel. If someone before you has messed with the IACV because it needed fiddling with as the fuel system was dieing out, we need to readjust it back. Getting things back to factory spec everywhere, is what's going to help the entire system. So if it idles at 400rpm with no IACV, that needs raising. Getting factory air flow back to normal will help us get everything back in spec, and likely help chase down any other issues. Back on IACV, if the base idle (no IACV plugged in) is too far out, it's a lot harder for the ECU to control idle. The IACV duty cycle causes non linear variations in reality. When I've tuned the idle valves in the past, you need to keep it in a relatively narrow window on aftermarket ecus to stop them doing wild dances. It also means if your base idle is too low, the valve needs to open too much, and then the smallest % change ends up being a huge variation.
    • Haggerty
      RB25DE NEO with Haltech ECU

      By Haggerty · Posted

      I guess one thing that might be wrong is the manifold pressure.  It is a constant -5.9 and never moves even under 100% throttle and load.  I would expect it to atleast go to 0 correct?  It's doing this with the OEM MAP as well as the ECU vacuum sensor. When trying to tune the base map under load the crosshairs only climb vertically with RPM, but always in the -5.9 column.
    • CF.Panda
      R34 25GT Engine Light 21

      By CF.Panda · Posted

      AHHHH gotchaa, I'll do that once I am home again. I tried doing the harness with the multimeter but it seems the car needed a jump, there was no power when it was in the "ON" position. Not sure if I should use car battery jump starter or if its because the stuff that has been disconnect the car just does send power.
    • Haggerty
      RB25DE NEO with Haltech ECU

      By Haggerty · Posted

      As far as I can tell I have everything properly set in the Haltech software for engine size, injector data, all sensors seem to be reporting proper numbers.  If I change any injector details it doesnt run right.    Changing the base map is having the biggest change in response, im not sure how people are saying it doesnt really matter.  I'm guessing under normal conditions the ECU is able to self adjust and keep everything smooth.   Right now my best performance is happening by lowering the base map just enough to where the ECU us doing short term cut of about 45% to reach the target Lambda of 14.7.  That way when I start putting load on it still has high enough fuel map to not be so lean.  After 2500 rpm I raised the base map to what would be really rich at no load, but still helps with the lean spots on load.  I figure I don't have much reason to be above 2500rpm with no load.  When watching other videos it seems their target is reached much faster than mine.  Mine takes forever to adjust and reach the target. My next few days will be spent making sure timing is good, it was running fine before doing the ECU and DBW swap, but want to verify.  I'll also probably swap in the new injectors I bought as well as a walbro 255 pump.  
    • AnimalGarage
      spot the stagea

      By AnimalGarage · Posted

      It would be different if the sealant hadn't started to peel up with gaps in the glue about ~6cm and bigger in some areas. I would much prefer not having to do the work take them off the car . However, the filler the owner put in the roof rack mount cavities has shrunk and begun to crack on the rail delete panels. I cant trust that to hold off moisture ingress especially where I live. Not only that but I have faded paint on as well as on either side of these panels, so they would need to come off to give the roofline a proper respray. My goal is to get in there and put a healthy amount of epoxy instead of panel filler/bog and potentially skin with carbon fiber. I have 2 spare rolls from an old motorcycle fairing project from a few years back and I think it'd be a nice touch on a black stag.  I've seen some threads where people replace their roof rack delete with a welded in sheet metal part. But has anyone re-worked the roof rails themselves? It seems like there is a lot of volume there to add in some threads and maybe a keyway for a quick(er) release roof rack system. Not afraid to mill something out if I have to. It would be cool to have a cross bar only setup. That way I can keep the sleek roofline that would accept a couple bolts to gain back that extra utility  3D print some snazzy covers to hide the threaded section to be thorough and keep things covered when not using the rack. 
×
×
  • Create New...