Engine dead? Turbo dead? What's wrong ?

Hi Guys.

Bad weekend :(

I don't know what is wrong with my car and maybe some specialists can take a look at me explanation into this thread (Test the water about a new engine)

http://www.mkivsupra.net/vbb/showthread.php?t=72262

Hope somebody can give clearance.

Thank you

Peter

Take out the spark plugs and have a look to see if they are all still there, that may account for the damage to the turbo wheel.

If you have no oil in the exhaust manifold, then I doubt that anything big has gone in the engine and that you may just have a problem with the turbo side of things.

Thank you Ben,

I have checked every spark plug and every ot the six was fine. Same burning picture and none are wet or oily.

Think would be fine if nothing with the engine, but what damaged the turbo. Maybe bearing clearence at high revs but if it isn't running there is no bearing clearance.

Is there a specialist in UK, that can check and reapair PHR DBB Turbos ??

Peter

You need to find someone with a PROPER medical quality endoscope to look down the plug holes and see if there is any det damage. Somethings been through the turbo. You may well find piston damage or worse. The oil restrictor is in place, so that's ok. The turbos basically buggered, but you MUST find out why before mending or fitting a good used engine.

I have a proper endoscope, not sure where you are based though.

CW - he's in Germany

I'm starting to think it's trailer to England time

I think it's first time to safe money... I don't have so much to repair everything at the moment:

What do you guys think of approx. costs if something is wrong with the engine and what would cost the work.

Peter

If your short block (the block without the head) is broken and it needs replacing you're looking at about £1800GBP for a new unit + removing the old one and fitting the new one.

I'd do a LEAKDOWN or COMPRESSION test first. And if you can get a borescope for a visual inspection that would be good too...

Have you done a compression or leakdown test?

Not at the moment...

Have no compression test unit but I have bought it and will test it this week.

I will give info after measurement.

What pressure is good, what is bad ?

Cheers

Peter

is there a oil restrictor present ? i only say this casue dbb's only need low oil flow.

mine has the same oil fitting as you and i'm NOT dbb, 040" is only 1mm so i would check the size of the hole in that anodised fitting

The restrictor is present....but if the oil pressure in the crank case was too high due to failure then you could still pass too much oiol through the restrictor.

YES !! Alex is in Right !!

If the pressure is to high, the oil don't flow back to the oil pan.

But i will check the restrictor size. Thank you UK-Rich. Is the 040 inch size?

What would be a OK compressions pressure ?? Got today evening a restrictor.

I think you need compression figures around the 190psi mark...

How good am I Here, for reference, is a DBB oil restrictor

-Ian

Anything over 140 and the engine should run OK, BUT!!! you can see good compressions even with piston ring and land damage, which is what I suspect you have. An endoscope (borescope) will tell you what you need to know without removing the head.

Let me ask, what is the ecu you are running, and was it mapped properly? Did you have a wideband O2 sensor set up so you could monitor fuel mixture in real time? If so, what were the figures under full boost?

I run 1mm restrictors on ball bearing turbos

@ IAN

Thank's for the picture... That's crazy because your hole looks like smaller as mine. What size of Turbo do you run ? Maybe the restrictor is different for different turbos.

Another question: Is this restrictor from a PHR Turbo Kit ?

@Chris

Thanks for you explanation. I will check today evening the compression and maybe I got a endoscope. But how can I see damaged Piston rings because the rings are beside the pistons and not over the pistons? I think I can only see piston damages.

To your questions:

I run a Stock engine with the stock ECU with MAP ECU from PHR. I think Dale mapped the car from Paul Whiffin because he defenitly installed the turbokit. Other mapped could be Thor Racing or Envyperformace. That's the three companys that Dale used.

I have installed a Wideband 2 weeks ago. The AEM UEGO and let it standalone. Have heard PHR recommend that. The only thing i have seen is, that the car runs at ideling very rich. AEM UEGO can't show. Runs under 10.0 but if I drive along the streets normaly it shows 13 - 15. Full boost is also between high 10 and 12 !! I think that is Ok.. Little rich but not to lean. EGT was never over 750-800 degrees celcius. Only for one time i have had EGT over 1000 but I think there was burning into the downpipe. I put 1 second on the throttle pedal and the temps falls down to 750 in another second.

I have checked my turbo and I have also 1mm installed. I think it was into the package and Paul installed it correctly. The kit was bought last year and installed in Sept. 2005. Since this time the turbo runs only 3000miles.

Hope that was everything..

Thank you all guys. I'm happy to get so much response.

Cheers

Peter

you definitely need that idling a/f ratio sorted. my car runs on the mapecu and idles nearly perfect 14.7, but i suppose thats the least of your problems at the moment

That map is wonky...idle should be 14.7:1 Infact all driving off boost should be 14.7:1 and when you lift off it should go mega lean.

This was a UK/Euro spec Supra converted to Single turbo yes?

I'd be tempted to go AEM....

That map is wonky...idle should be 14.7:1 Infact all driving off boost should be 14.7:1 and when you lift off it should go mega lean.

 

This was a UK/Euro spec Supra converted to Single turbo yes?

 

I'd be tempted to go AEM....

My MapECU works OK. The only time when my idle was way off like that was when i had an injector stuck open

12 is too lean at WOT on boost. 1000C is FAR too high for EGT's. I'd get a proper ECU on it and get it mapped.

An endoscope will show ring damage as scores in the bores.

My MapECU works OK. The only time when my idle was way off like that was when i had an injector stuck open

That's great but it does sound like this one's mapped wrong - but like you say it could be a fuel system fault...

I wonder if Bore Wash is the cause of the other issue's?

That's great but it does sound like this one's mapped wrong - but like you say it could be a fuel system fault...

 

I wonder if Bore Wash is the cause of the other issue's?

thats exactly what i was thinking, i remember Dales saying that he the tuner/mapper couldnt lean out the idle. Thats the reason he was going to swap it out to an AEM. i really think bore wash could be the cause of these problems and definitely think there is a fuelling fault there somewhere

OK Guys.

Got the result and it is bad... Very bad.

1. Cylinder is only 7 bar sorry but I don't know the PSI pressure. Maybe someone can calculate. But that's is defenitly not enough.

2. 9bar

3. 10bar

4. 10,5bar

5. 10bar

6. 10,5bar

What do you guys think... Open engine and repair or buy a used one ?

I don't know what could be wrong with the fuel system. Everything installed Paul and is was everything new. Dale spent a lot of money and bought the PHR Fuel Stage 2.

I have the AEM and everything that is needed to install at home, but I did not want to install it because the car runs well in my opinion and the mapping would cost a lot of money. I would first drive this summer and now this fuc.... bul.. shi... "!!! But if the engine and everything was repaired i will install at the same moment the AEM. But if I have installed it, I defenitly would say the AEM is the reason for the damage:rolleyes:

What would you guys do in my case ?

Thank you all very very much.

Peter

oh dear

1. 102.9psi

2. 132.3

3. 147

4. 154.35

5. 147

6. 154.35

Dale did try the AEM but it's an auto and Thor had issues with it. Compression resuls don't look good at all