Rb20 problems

[Drift_R32]

hey
well decided to change turbo setups
so got hold of a hypergear TR44 with 50mm gate on a stock manifold

all shit came off my mates redtop Rb20det which was running fine.

anyways everything on and exhaust bolted on

went to go for a drive down the street..
took off barely giving it any in 1st. got to about 4k and it has MASSSIVE spark breakdown or something like that nature sounded, anyways started running like shit to the point where it started rattling the bottom end. by then i had pulled over and was like fark there goes the engine.. anyways as quick as it started the rattle it was gone.

did this twice..

at idle the stock oil pressure gauge is reading 0 and as you rev it slowly it rises..

I did change the fuel pump to a GTR one its all mounted and wired properly...
even if it was running leak, wouldnt cause a bottem end rattle surely ?

car has been sitting around for about 2 weeks
was running perfectly fine before this happend with a 2510..

has near new JJR coilpacks
checked all the plugs i could have touched but i havnt really touched any of the them besides AFM which is definately plugged in

ATM im thinking theres a oil blockage and some sensor is dying.

[Drift_R32]

checked and turbo wheel does spin..

but reving it on the spot it refuses to make ANY boost..

not even the slightest..
something in the turbo isnt right im gathering.

[Lonewolf]

boost leak?

[AD4M]

afm plugged in?

[Drift_R32]

took wastegate apart and the two nuts that hold the bottom section tight where completely off but so fixed it but its till leaking for some fukn reason thought maybe vaccum lines where wrong but its straight off front of turbo to side of gate. which is right isnt it ?


also the adjuster screw on the topp of the external waste gate what does that do ?

[Drift_R32]

AFM is plugged in..

double checked that
it just wont make boost. its leaking out somewhere hell bad.

[BIGS]

What clamps you using on your IC piping? I had ones think they were those gay monza ones, they didn't give even clamping pressure but couldn't tell it was leaking until high rpm and hoses stayed on.

[peaknwa]

adjuster on top of the waste gate is for spring pressure ie boost adjustment what sort of gate is it? Are you running a boost controller? You may have split the diapham in the waste gate meaning no boost. Did you put the same turbo back on or different?

[Drift_R32]

sorry guys i didnt update this
took off turbo and rear housing and fins where worn away from the welder doing a fukn shithouse job on the external gate mount on the stock manifold.

mettam mufflers balcatta..wasnt cheap either

anwyays smashed on a 25 let is idle for like ten mins and drove it about 500ms but wasnt making any boost either took turbo off and exhaust wheel had completely blown off and out the exhuast

sooo another 20 turbo on and waiting to see what happens..

biggest fuk around ever.

[Boza]

http://www.antilag.com/forums/showthread.php?t=45000

forkout whack that on and be done with it...

[Drift_R32]

yeh thats not bad.. tiny compared to what orginally was going on,

problem is i gotta get it running first to make sure evreything else is ok cause im having idling problems too and at one stage had a small ticking sound from top of the head like a tappet or something not pumping up..

kinda over it atm

may be for sale soon lol..
or could cop a stagea front cut.

[Lonewolf]

25/40 is apparently pretty poo on an rb20, due to lots of lag but without the power of a big turbo

[peaknwa]

bin the 20 put a 25 in it so much better makes more power and more torque win win it wont cost you that much for change over after you sell the 20

[MrMayhem]

Hes right you know

[ryanr32]

Problems Not the turbo the problem is it's not a 26

[Drift_R32]

fuk 26s, unless u got the funds to rebiuld it..


anyways just recieved car back now running a stock 20 turbo and a 50mm external gate.

having a boost issues AGAIN

this time..
it will only make 5psi..
and the external waste gate is opening pretty much asoon as you hit 0psi as i can hear it coming out the screamer

i have a turbotech boost controller that was working fine on last setup and no matter how i adjust it it will only make 5psi

soo in conclusion is the external fukt ? as in its not holding valve shut ??

is there any adjustment i can make to make it hold the boost ? as in the adjustment screw on the top of the external ??


cheers

[blaize]

I think the only way to fix that problem is to put in a different spring to suit more boost?(correct me if im wrong)

[R3N]

There isnt any adjustment on an ext gate apart from changing the spring. Try putting anoter wastegate on and see if that solves your problem? Seems as though you've changed everything except the wg

[Drift_R32]

nah the wastegate is a new one!
the one i was running when i had the TR44 on there i turfed as the mount was bent out of shape.

i thought if u ran a spring to suit say 10psi, and then u ran a manual boost T between the turbo and the wastegate, the wastegate would just hold whatever boost the manual boost T was set at as that was really acting as the boost controller?

whats the screw part on the very top of the external wastegate with a lock nut on there for ? i thought that was for adjusting how much preasure it held as it would tighten the spring when its wound in.

[BIGS]

^^ possible readjustment of said spring if you played around with it before? I had a shagged gate but rather than restricting boost it did complete opposite and spiked like crazy. Does sound like a gate issue though. As has been suggested maybe new spring or worst case gate.

You did say the manifold and gate was working fine previously on mates car? Just crossed my mind that maybe the gates not been positioned correctly and not scavenging properly. I bought a supposedly working setup turbo/gate/manifold and had to replace already mentioned shagged gate than had to relocated the new gate due to this scavenging problem. Just a suggestion probably unlikely and I am no expert just throwing out ideas based off my own experience.

[PAGZ]

2 Solutions to your problem

#1 GT3076r .82
#2 RB25det

[Drift_R32]

nah this is a new setup the old setup got binned..

umm position wise where it is it should work fine...
think it has something to do with the spring or the diaphram inside. gonna pull it off today and put on a blanking plate. if it boosts up fine then i nkow its the gate for sure.

[Turbo2.6L]

Drop 2nd with blanking plate on please.

[BIGS]

Drop 2nd with blanking plate on please.

As long as theres a video for our viewing pleasure

[Turbo2.6L]

Pics of aftermath & tears will suffice!

[Drift_R32]

well took off wastegate and i could push the valve half open with just my hand so i was abit sus. took it apart and someone has cut the sping in half?? fuk knows why youd do that..

and even with the spring out cant seem to activate the valve by blowing on the nipple so its going in the bin.

[R3N]

nah the wastegate is a new one!


:confused:

[Drift_R32]

well not "new" but new as in another one compared to the other one i first installed..


anywasy two wastegates in the bin

brand new one on the way..

[BIGS]

Not possible to just replace with new spring?

[Faz]

^ +1

[Drift_R32]

Nah diaphragm is really stiff and doesn't activate properly..

[DTM-031]

ebay spec.. cheaper to buy whole new gate than just spring

[mitchy]

they were probably ebay gates in the first place, thus the problems.
something that controls boost is not something you want to skimp on, fortunately in this case they were staying open, as opposed to the "conrod stress test" gate sticking shut.

[Drift_R32]

Yeh I'm running a boost controller with it to be safe.

[mitchy]

if the gate sticks shut, a boost controller won't do anything. it will just keep going until the 20 throws a leg out of bed

[SimonR32]

But it will go hard in the mean time....

Another retarded topic ftw

[BIGS]

they were probably ebay gates in the first place, thus the problems.
something that controls boost is not something you want to skimp on, fortunately in this case they were staying open, as opposed to the "conrod stress test" gate sticking shut.

My sentiments exactly. Went from a tial to what Must of been china than back to a tial. How I didn't put a rod through the block or at the very least destroyed a piston ring is beyond me with a spike of 30psi. Learnt my never to be repeated lessons on that one.

[Drift_R32]

meh its only a 20, which are piles of shit aye mitchy thought youd be incouraging such use of china products.

its from JJR btw..

SimonR32 didnt you buy an china spec fuel rail and stick a HKS sticker on it ?

can u send me the link to the sticker? so i can stick one on my external ?

[mitchy]

lol... yes, 20's are gay.

[PAGZ]

meh its only a 20, which are piles shit of aye mitchy thought youd be incouraging such use of china products.


hmmmm interesting read....