Jump to content
SAU Community

Surprised

gdogzgtr

By gdogzgtr,
in Engines & Forced Induction

 Share

Recommended Posts

gdogzgtr Proficient

gdogzgtr

Posted
Posted

I had my R33 Gtr Dyno tuned at 310 AWKW recently and found out had detonated piston so had rebuild with Forged pistons, head work, metal head gasket, N1 oil pump, N1 bearings, new belts, new crank and blue printing. Had car re tuned and found only 2KW increase in power.

Is this normal? I would have thought it would have increased around 20 kw but still happy with overall power just thought this was interesting. I guess that power just safer with stronger engine now.

Link to comment
https://www.sau.com.au/forums/topic/108019-surprised/
Share on other sites
r33_racer Grand Master

r33_racer

Posted
Posted

maybe the headwork took you backwards and the extra power from increased compression and the rest brought it back upto your previous power? its abit strange, though ive heard of people not making any extra power from doing a fresh rebuild.

Generally if your engine is in piss poor condition, after a full rebuild it should run alot better, make better power with less inefficiency due to everyting being returned to factory spec or better.

Link to comment
https://www.sau.com.au/forums/topic/108019-surprised/#findComment-1992048
Share on other sites
wrxhoon Grand Master

wrxhoon

Posted
Posted

Did you lower compression ? What kind of head work did you do? Is the engine still very new and very tight ? Piston to bore clearances? Do a comp and leakdown test then you will see whats going on . The dynos can make a lot of difference even if you used the same dyno .

Link to comment
https://www.sau.com.au/forums/topic/108019-surprised/#findComment-1993301
Share on other sites
shif_tea Grand Master

shif_tea

Posted
Posted
Forged pistons won't increase power.. just your capacity to do so...

yeah but i think he means the car was dynoed with a busted piston and with new ones (not leaking pressure) it should probably produce better power. Plus with the engine cleaned up like new you'd think you'd get a little bit.

Was it the same dyno??

Link to comment
https://www.sau.com.au/forums/topic/108019-surprised/#findComment-1994264
Share on other sites
gdogzgtr Proficient

gdogzgtr

Posted
  • Author
Posted (edited)

Sorry can't say much. It was at same dyno and engine build all arranged through UPI in moorabbin. I know they sent it off to get done and because of christmas break only get the car next week. Sorry don't know much technical terms yet am learning form reading in here though. Thanks for all replies. Car only had 34K on clock and maybe they are genuine as no difference in power after re-build. If so obviosly very happy with car. Get R33 GTR with probaly now 40K in newish mods, very low K's for little more than mods would have cost. Also only charged fo rparts in re-build as upgraded parts involved, just wish had the money at time to do cams and rods. Maybe a future thing and get T04Z or similiar in a few years time.

I read on here that 400+rwkw is the new 300.

Edited by gdogzgtr
Link to comment
https://www.sau.com.au/forums/topic/108019-surprised/#findComment-1994743
Share on other sites
Josh Grand Master

Josh

Posted
Posted
yeah but i think he means the car was dynoed with a busted piston and with new ones (not leaking pressure) it should probably produce better power. Plus with the engine cleaned up like new you'd think you'd get a little bit.

Was it the same dyno??

Ah my bad :) , true it should have made a bit more power over the busted piston... Not a lot tho..

Link to comment
https://www.sau.com.au/forums/topic/108019-surprised/#findComment-1995054
Share on other sites
RANDY Veteran

RANDY

Posted
Posted

Hang on... metal head gasket should decrease compression, right? Thus giving you more potential to boost it higher.

Headwork... if you had it shaved down to increase compression, then you're right back where you started in terms of manifold volume. (due to the metal headgasket increasing the volume)

If you didn't have the head shaved, then it's still the same, and whether you did port matching and so on or not... if the head wasn't maxed out in terms of flow, then porting and polishing shouldn't actually do anything.

You've got a stronger top-end, which should put up with the power you have. I'd be happy with that!

Link to comment
https://www.sau.com.au/forums/topic/108019-surprised/#findComment-1995516
Share on other sites

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


  • Latest Posts

    • Dose Pipe Sutututu
      What brakes on R34 GTT(Europe)

      By Dose Pipe Sutututu · Posted

      Pads for R32 GTS-t, R32 GT-R non V-Spec (Sumitomo), R33 GTS-t and R34 GT-t are all interchangeable. R34 GT uses a 2x piston caliper, hence it didn't fit.
    • soviet_merlin
      WGNC34 - floor mats

      By soviet_merlin · Posted

      Checked with amayama and nope, the full S2 manual set is not available anymore. Unsurprising, but still disappointing as the ? on availability gave a glimmer of hope.
    • joshuaho96
      Tomei gasket

      By joshuaho96 · Posted

      I've heard the Tomei USA head gaskets are decent if you want to o-ring the heads but otherwise not recommended.
    • GTSBoy
      What brakes on R34 GTT(Europe)

      By GTSBoy · Posted

      The 296mm rotors are the R33 turbo brakes. The 310mm rotors are the R34 turbo brakes. The calipers are nearly the same, but not. They're the same caliper but the R34 caliper has longer legs so that it sits out far enough to go over the rotor. The pads are the same for both. When you say, "I bough tsome EBC"....did you just mean pads? Or rotors? 310mm rotors fit under 17" wheels. There may be some wheels without enough clearance though. I can't fit my fingers between the barrel of my wheel and the "corners" of my R34 calipers, but there is plenty of room behind the spokes. This is on Enkei RPF1. You can fit 324mm rotors inside a 17" wheel, but I'd be willing to bet that it would be close to impossible with the Nissan/Sumitomo caliper (using an adapter, of course), because the Sumitomo caliper is fatter than the Brembo caliper that is supposed to go on the 324mm rotors.
    • Kapr
      What brakes on R34 GTT(Europe)

      By Kapr · Posted

      Hi. Can someone tell me what brakes(and mainly WHERE) can i buy brakes on R34 GTT? I bought some EBC which SHOULD go on my car(i have GT but it has GTT brakes) but it does not fit, Brakes are "too" small(296mm) Are 310mm be good or? I have 17 inch wheel so no "big boys" but for me driving i just need one that fits and i can get here in EU/Czech.
×
×
  • Create New...