s2erst

This is starting to do my head in i finally got my rs all up an running nice an first time out in it since i fitted new turbo an external wastegate problem is its not boosting at all an screamer pipe is open all the time when should be shut till full boost any ideas what ive done wrong cheers just thought does it matter what way round the valve seat goes

s2erst

right the valve seat only goes one way so its not that. im not sure if this is right or not but i plug a boost gauge straight off my turbo housing an the gauge didnt even move surly that cant be right its like there is no pressure there hence the top feed to wastegate not being able to keep it shut can anyone clear this up for me cheers

ghigo

hello mate,
did u swap the flanges round? was it seating nicely?

s2erst

hello mate yeah all done fitted the firing ring only goes one way but stll the same screamer is open all the time

ghigo

http://www.tialsport.com/documents/w3_tial_wg_assem.pdf
is the flange damaged from cutting and welding ? cant be seating properly

s2erst

From that picture I've got mine up the other way coz doesn't seem to fit the way in that picture

Jamie_EscortSport

have you removed the wastegate completely? is it still open
Which way have you plumbed up the vac

s2erst

ive got gizzmo boost controller. i have air line from turbo housing to T peice an then splits of to port 1 an bottom of wastegate an then from port 2 straight to top of wastegate

Jamie_EscortSport

Anything like this?

s2erst

Yep that's how mine is set up. i have now fixed problem with screamer pipe being open all time so i no got to give it a test drive tomorrow an see if it boost ok

ghigo

cool what was it in the end, anything simple lol

studabear

You do know it won't build boost up while stationary?

s2erst

right well took it for test drive an still not boosting an i put a bolt in top of wastegate to keep it shut an still no boost so its not down to external wastegate what else can it be

muz

Stupid question but is the turbo external wastegate compatable or been modified to work with such?

s2erst

i bought turbo second hand it came off a honda it that was running external wastegate aswell so should work ok on mine how could i tell

DazC

iTrader: (1)

Quick simple test. Pull both vac pipes off the wastegate and take it for a drive. If it boosts let off IMMEDIATELY!!

s2erst

if it doesnt then what coz i still dont think it will

Bomber

Can you post a pic of the install - so we can see how you've piped everything up and how the wastegate is mounted.

s2erst

only thing different is the pipe going form turbo housing to bottom of wastgate so i could rule out boost controller

Bomber

Have you actually driven it, as it won't boost without load.

Reading back through, how did you solve the wastegate from being open full time and the screamer barking its nuts off?

Have you checked the spring in the wastegate? You can also check to see whether the wastegate is actuating by hooking a air line onto the bottom port of the wastegate and seeing if the plunger moves.

Also I see a Black ERST over Shoreham - is that yours? Has Red calipers and RS 7 Softlines.

s2erst

mine is in southwick outside my work arrow tyres an is black with gold hispec brake an rs7's but not softlines. yes have driven mate. yeah done test on wastegate an opens an shuts as it should.

Bomber

Yeah thats it. By the Schooner.

Bomber

What spec is the turbo? And what does the Boost gauge read at 1k, 2k, 3k, 4k etc? Does it boost a small amount or always in vacuum?

s2erst

Yeah thats mine mate. Its meant to be a gt30 so ive just been told by the person i bought it off. on idal it reads -10 an when i drive it then goes to 0 sometimes 0.01/2/3 thats all i get. ive just taken wastegate off an blanked it an took it for a drive still no different so its not the wastegate which now leaves turbo at fault which cr turbo doesnt think it is or major boost leak which i just done a test an is leaking between throttle body to inlet but still dont think its bad enough to give no boost

Bomber

Yikes. Whats the actual spec of the Turbo - what is the A/R on both hot and cold sides and Trim of the wheels? If it's GT spec it'll need water cooling (can't quite see in your pics).

It might be mismatched to your engine spec.

Bomber

Oh and do the compressor blades spin round freely?

s2erst

some pictures. yes all spins up nice

Bomber

No idea - the A/R ratio has been polished off the housing. Are you 100% you have no boost leaks? And how far have you taken it - 5500rpm and still zero (with a decent load an in 3rd gear say)?

s2erst

like i say mate i have a boost leak between inlet an throttle body which im sorting now but just dont think its bad enough to show no boost at all

Canada1

The Honda guys like turbos to start boosting well after 5000 rpm.
Honda cylinder heads have great flow - but one has to rev very high to take advantage.
I would not be surprised if it will only start boosting at 5000 or even later.

s2erst

oh really interesting. what if thats not the case would a blown headgasket stop me from boosting at all

s2erst

i have just done compression check an are all about 250 not sure what it should be

Canada1

250 psi?
That is extremely high. What compression ratio is the engine supposed to have.
Typical compression check for a turbo engine is about 160 psi.

s2erst

yeah 250psi i thought it sounded high dont know what ratio is mate

muz

I wouldn't have thought that would stop it boosting at all. I had a leak once on my TB to inlet and it still boosted like normal. Conor had a massive leak on his inlet to head gasket and it still boosted.

s2erst

Its all pointing to turbo to me

s2erst

Think i may know what I've done wrong on the turbo exhaust side next to compression wheel is an inch hole an i have not welded it up an think it might be leaking from there does that sound like that's my problem

Rob_DOHC

iTrader: (4)

lol, I think you may have found your problem mate.

s2erst

lol i think i may have. Im sorting it tomorrow so will let you know then if it does work is it ok to give you a buzz Rob to sort out setting my boost controller out cheers. Did you still want your door handles done mate

Rob_DOHC

iTrader: (4)

Yea no worries, give me a bell any time you like I'm out at some point looking at a car so if I don't answer just drop me a txt and I'll give you a call back.