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Need Help R33 Gtst Related

R33GOD

By R33GOD,
in Engines & Forced Induction

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R33GOD Grand Master

R33GOD

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Posted (edited)

hey guys got my turbo put on, all tuned on 16.5 psi running 251rwk with all supporting mods.

the turbo does hold boost but as soon as u hit 5,000rpm it just hesitates and drops off to 5 psi. can hear a hiss but cant find it.

took my car for a drive tonight and didnt feel as strong at higher rpm.

boosted it again and it got way worse. in 3rd gear soon as i hit full boost car feels like the brakes are being applied and wont rev anymore.

the first couple of times when its just warming up is fine then it does it. boost was dropping down to 4-5 psi.

turbo is new. checked all my hoses and inspected the turbo and its perfect still.

only thing i can think of what i did last week i wasnt paying attention and i ran up a rounded gutter and cracked my front bar. been doing it since then. few days ago

Edited by R33GOD
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R33GOD Grand Master

R33GOD

Posted
  • Author
Posted (edited)

i have a blitz bov. its atmo

these are my mods

stock internals

hiflowed ball bearing turbo 450hp

splitfires

pfc

blitz fmic

tomei pump

600cc injectors

z32afm

stock intake pipe with k&n air panel filter

full 3in exhaust.

hid boost controller

Edited by R33GOD
mick-skyline Contributor

mick-skyline

Posted
Posted

have you checked all your pipework? sounds like a leak from something.... try getting under the hood and flicking the throttle cable see if you can hear where the leaks coming from.... as for the car feeling like the brakes have been applied that souds like saftey mode so you dont blow it up....

R33GOD Grand Master

R33GOD

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  • Author
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ok fixed the hose problem but it still drops off boost sometimes.

it only does it when its been thrashed after about 6 times or so.

spoke to my tuner and he thinks it could be my hdi boost controller solenoid getting way too hot. or an actuator issue?

thoughts and experiences if anyones had a ebc prob or actuator prob?

R33GOD Grand Master

R33GOD

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  • Author
Posted (edited)

today i further inspected the problem and still couldnt find the prob.

so far i have done a boost leak test.

changed boost controllers

took off front bar inspected cooler and silicon piping

changed all boost line hoses from actuator.

only thing i can think of is maybe the intake pipe is sucking closed.

cause it only does it when u hit the throttle hard on down gear, or at top end as i change hard into 4th. and sometimes 3rd

Edited by R33GOD
boostin_r33 Collaborator

boostin_r33

Posted
Posted

it does sound like a boost leak coz at high rpm it drops but if it was it would have given way and popped off hope u work it out! Try connecting a hose straight from the wastegate to the intercooler piping and see what it does then?

R33GOD Grand Master

R33GOD

Posted
  • Author
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ive done everything and soon as the car gets hot after a couple of runs its still doing it.

i done rev210's intake pipe mod also, so i dont know what to do.

only thing i can think of is not enough preload on the actuator. its set to half a hole at the moment.

another theory. if i have faulty plugs and when the car gets real hot would it cause less combustion thus the major boost drop?

Travis Trayhern Proficient

Travis Trayhern

Posted
Posted

mate i had simular prob wif my gtr first noticed it on a trip to melb hit full boost than dropped to half and it would only half boost up after that untill i restarted the car then it was normal again its happined about 3 times now but they have been on really hot days so i just thought it was the ecu in safe mode or something

colossus Community Regular

colossus

Posted
Posted

I'd be doing another boost leak test - if you ran up a gutter and cracked your front bar youve proabbly done somthing to your FMIC or piping. Stick a can of baked beans in the intake and pump it up with an air compressor. make sure you go under the car to listen for leaks too.

R33GOD Grand Master

R33GOD

Posted
  • Author
Posted
I'd be doing another boost leak test - if you ran up a gutter and cracked your front bar youve proabbly done somthing to your FMIC or piping. Stick a can of baked beans in the intake and pump it up with an air compressor. make sure you go under the car to listen for leaks too.

ive taken the fmic out completely and inspected the piping and tanks. they are perfect

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