Gtr Engine Rebuilt, But Seems Slower Help!

[BlackR32]

Hey all, Hoping for some input :

I just rebuilt my GTR motor after the oil pump failed and took my crank along with it. I replaced the oil pump (n1) the crank (33 gtr) the rings (n1) and bearings… I put a sump baffle in also… thank that’s about it.

Now the engine is still on running oil at the moment. I’m not sure if this would have an impact or not.

Now… I have A greddy boost gauge which is not hooked up properly electrically, but also I have a HKS EVC which is working just fine, the EVC is reading 6 pounds which is what I have always run at but the car just seems a bit slow. More to the point I drove my mates supra the other day which has ever had anything on the GTR but I’m SURE the supra is running faster than my car.

Now I know I shouldn’t be smashing the car while its running and I’m not, but when you DO put the foot down, it feels like its running on lower boost… runs dead smooth but just not fast. The boost is definitely coming on. Just not convinced its running as fast as it did.

The head was shimmed before putting back on , and the rings are new, so it shouldn’t be compression…

Any other ideas at all?

[BlackR32]

Update... although I can feel the boost I am not conviced that I can beat a v6 magna to 100, or to 140.......

point is its running smoothly but very slow whats wrong with my GTR?

[Yawn]

You said you're still running the engine in? How can you tell for sure then, unless you've not been following run in procedures

[BlackR32]

I am as far as \i know. I am running th car gently for the most part, putting load on it up hills but not too much and so on, but from my reading I know that you shouldn't be gentle on it always sometimes you need to give it a hard time.

also i am on the home straight only 150 k left to go on my 1000, but when i put the foot down there is boost but just not much power.

makes me sad.

[T04GTR]

hrmm. have you done a timing check?