Rebuilt GTR..not enough go?????

[ricknismo]

All rebuilt...runnin in...finally get a few k's on er and give it a bit.

Doesn't really splutter, more of a hesitation

Feels like it wants to go, but mellow's out.

Goin at 0.6 bar steady..so I don't think its leaking.

I have a nisdat..timings ok, oxygen and af sensors seem fine.

It doesn't seem to retard as though the knock sensors are kicking in.

New battery, newly flowed infectors, new plugs...like I said it doesn't splutter like a lack of fuel or spark.

At a guess its electrical...any thoughts

[voona]

Mine feels exactly the same.. Basically no notisable problems just no power..

Id get it on the dyno and see how much power shes putting down and check the af's.. PM me if you find the problem ..

All rebuilt...runnin in...finally get a few k's on er and give it a bit.

Doesn't really splutter, more of a hesitation

Feels like it wants to go, but mellow's out.

Goin at 0.6 bar steady..so I don't think its leaking.

I have a nisdat..timings ok, oxygen and af sensors seem fine.

It doesn't seem to retard as though the knock sensors are kicking in.

New battery, newly flowed infectors, new plugs...like I said it doesn't splutter like a lack of fuel or spark.

At a guess its electrical...any thoughts

[600hp]

how may kays have you done, could the engine still be tight?

[[[d a n n y]]]

that was the case with mine

after rebuild and the boost controller removed it was runing 0.6bar boost.

not 1 bat boost as it should be.

[ricknismo]

yeah about 600..but I still would have thought as revs pickup power would too.

Another strange thing...my boost controller doesn't work now...but electrically does.

Something is cutting, I'm sure of it..fuel,boost??

Weekend will reveal I hope. Got a new fuel pump happenin and another gtr to swap stuff.

If I'm game, i'll free boost it in 3rd and take my foot off as soon as it goes over 0.7 as it only does 0.6 now.

[[[d a n n y]]]

hm..what RPm does it stop boosting at ???

mines constant at 6K rpm 0.6bar boost

but b4 my rebuild the car made 1bar boost power untill 8K rpm and didnt stop untill hitting the limiter

[ricknismo]

eggsacery the same champ

[ricknismo]

Haven't really tried to rev it past 6 though...run in

[giant]

sounds like boost leak or boost control issue, are all inlet hose fitted correctly??

very easy to miss a hose!! i have recently fitted a brand new engine to gtr and

tight will very little effect on boost achievable.

i also doubt fuel is issue.

it really does sound like leak or control issue, maybe turbo actuators partially open.

also check that you blo off valves are not leaking.

cheers russell

[cameron]

Has the engine been run in properly?

I wouldn't be reving upto 6k inless you have done atleast 1,000k's.... Before then you should be reving to 3k.

[dangerous_daveo]

Has the engine been run in properly?

 

I wouldn't be reving upto 6k inless you have done atleast 1,000k's.... Before then you should be reving to 3k.

Lots and lots and lots of theorys on how to run an engine in...

But yeah, Id say how all your little hoses are hooked up, just if stuff was working before, and isnt now, its more than likey going to be something small that would be easy missed. Such as forgetting to put a piston in, thats big stuff, it just wouldnt happen. Putting a little hose on the wrong nipple, thats easy as to miss.

[R31Nismoid]

Has the engine been run in properly?

 

I wouldn't be reving upto 6k inless you have done atleast 1,000k's.... Before then you should be reving to 3k.

thats a myth

My car, bedded in on the dyno, and been runnning 16psi ever since, 7800rpm limiter no probs

nearly 6000km's and i have no problems. car runs fine, makes the same power as it did from day one.

[cameron]

Yeh true,

Depends on what rings/piston's you are running some take longer then other's.

[ricknismo]

Had another thought, I got aftermarket dumps with that little segregation in them..I wonder if they are lined up incorrectly, wouldn't think theyd be hitting anything

[ricknismo]

A mate had a similar problem and found his CAT stuffed..got to check that too now.

[ferni]

thats a myth

My car, bedded in on the dyno, and been runnning 16psi ever since, 7800rpm limiter no probs

nearly 6000km's and i have no problems. car runs fine, makes the same power as it did from day one.

Didn't you have a turbo problem

[slow13dude]

0.6 bar is a little low isn't it?

Don't GTRs use 0.8 out of the box?

[R31Nismoid]

Didn't you have a turbo problem

yeah, but that was related to the old motor, just a problem we didnt pick up till it got onto my new one

[ricknismo]

yeah it used to do 0.8 standard

[[[d a n n y]]]

0.6 standard for me