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Ask them to check the timing again, (belt missed a tooth)

If it has adjustable cam gear make sure the bolts holding it in place are tight.

Might be an idea to swap the stock intake pipe out for a stronger silicone one.

probably standard size. why do you ask?

purely because you often find with a thicker than stock head gasket you loose some low/mid range. only because of the drop in static C/R.

but if it's standard forget that then. look to the tune, and as others suggested make sure the cams are set and timed properly.

could also just be the dyno... does it actually 'feel' lacking in midrange? maybe run it down the drag strip and see what kind of time and mph it runs, or even just run it up for a power run on someone else's dyno and see what you get.

could also just be the dyno... does it actually 'feel' lacking in midrange? maybe run it down the drag strip and see what kind of time and mph it runs, or even just run it up for a power run on someone else's dyno and see what you get.

yes it feels lacking in mid range. big time!

i found the problem, the vct electrical clip was broken and disconnected. i replaced that and hello midrange powah!

trouble is, they tuned it like that. so i expect they wont mind re-tuning it properly now.

thanks everyone for your help and advice!

the people who mentioned vct were right on the ball. the electrical clip for the vct solenoid was broken!

its runs much better now, but will obviously have to be re-tuned. i dont know how they didnt notice this on the dyno though...

Ive seen every stage of your build so that would be a yes :P

HAHA

it lived there for about 3 months! it started as a motor in and out...

and then i bit off more than i could chew and added a turbo, clutch, split dump, $200 cat (which i then gutted in a fit of rage), ecu and bov.

the motor came minus camshafts. but my cams from the blown motor didnt turn in that head. so then i had to find a replacement head, have it machined, new gasket etc.

then we had to get all the water and oil lines for the turbo! the old turbo was oil cooled only, so whoever installed it just hacked off all the water feeds. needless to say, genuine nissan cost a mint.

and after all that, when the car rolled off the dyno at long last... the wastegate actuator fell off on the way home!

and now this vct problem! its been 5 months since my poor baby has been running at 100%.

cant wait until i get a gtr and do it right the first time.

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