Turbo issues...

[Dorikin]

hey guys,

ive got a 1988 Cefiro, has Rb20det, im currently running a HKS 2530 turbo but lately its been making a weird high pitched wistling noise, the turbo still boosts fine, but just earlier on today i took it out for a run and the the car started boosting fine then the power just cut off completely then back on again. it wasnt stuttering like it was a sparkplug problem so im guessing it could be the turbo wearing out?

the car is running bigger injectors (unsure of size, but runs about 66% at 1bar)

Tomei cams (again unsure of specs)

2530

Z32 AFM

3core radiator

oil cooler

FMIC

Power FC

and few others

just wondering if it would be my turbo, or something else. havent owned an RB before, only a SR20DET and a 13BT.

if it be worth rebuilding it or going for something bigger?

cheers guys

[R31Nismoid]

i would doubt power would come and go with a turbo.

it's either working or not... going by my expiriances with blowing my GT30.

one min there was stupid acceleration, next second no boost, and it didnt come back.

then just a sickening rattle from the shagged cartridge.

when you say, cut-off. What you mean... seconds, a milli-second...

over bumps or something - ie some surge ???

[Dorikin]

was sideways actually lol, and just stopped for a second then back on again, was weird, and the turbo has been making different noises lately so i thought it coulda been that. im going to change the plugs and see if that cures it, if not ill get it diagnosed

[R31Nismoid]

hrm, if the turbo is still working. and not leaking oil or anything then it would seem ok

[Dorikin]

cheers mate, just making a really weird spool up noise, and has cut out once, so i have no idea lol...

thanks for the help!

[kwazza11]

cheers mate, just making a really weird spool up noise, and has cut out once, so i have no idea lol...

thanks for the help!

i'd guess that if its making a high pitched screaming noise that it'd be an exhaust leak on the manifold side, check that all your manifold and turbo-manifold nuts are nice and tight.

power loss could be an entirely different issue.