A couple of things!

m1tch · January 18, 2010, 12:06:39 AM

Whoah I didn\'t think the stock turbo could get that pressure lol I don\'t push mine that high and mine is fully uprated lol

TiddlesRX7 · January 18, 2010, 08:43:38 AM

Yeah tell me about it! Brown underpants time.

Im wondering if the wastegate is sticking and not allowing the pressure to get away quickly enough.

pdtaylor18 · January 22, 2010, 07:15:04 PM

I had a few idle and hesitant issues with the white one in its early days and that ended up being the FCD. Disconnect it for now and see if the issue goes away. Mine was unbranded.

L18M · January 22, 2010, 07:19:20 PM

tiddles, the black box one might be a Knight sport fcd as that is same as ths KS ones i\'ve seen. the stickers can come off due to heat in the bay?

TiddlesRX7 · February 04, 2010, 09:04:54 PM

Time for an update.
The FCD is working. I now know what fuel cut feels like! Not good.
I fitted my HKS EVC2 boost controller Now I thought I was on too a winner but after taking it out tonight and setting the boost as low as the controller would go I was still seeing massive boost pressures. And in the black of night the turbo was glowing red. It smelt of hot oil not good. This is all within a 1/2 mile or so run and 1 boost of the turbo. Now if I am carefull witht the throttle the turbo boosts well right through the rev range @ a max of around 10psi. But if I am more agressive it over boosts and pops and bangs like fook. I have come to the conclusion that my turbo is knackerd it has got some shaft play that I find a bit exsessive. But why is it getting so hot so quicky and why is it overboosting when I havent changed the set up of the car? Could the actuator have failed and its holding the boost because of this?
Any advice would be greatly received.
Ade

grinder · February 05, 2010, 09:25:50 AM

out of interest - has the bar fallen off the bottom of the wastegate ??

when i did some exhaust work on mine - i managed to knock it off ( and the new owner did aswell )

i have NO idea what it does - but worth checking

Prof · February 05, 2010, 09:38:17 AM

That does sound like a classic \'boost spike\' issue.

If you throttle up gently, you\'re giving the wastegate plenty of time to open, so the excess gases can pass by the turbo without a problem. When you hammer it, you\'ve a lot of gas suddenly trying to get out into the exhaust and the stock wastegate is being overcome.

Do you get boost creep ? Is the car boosting higher and higher in the upper gears ?

Is the wastegate ported ?

If not, you may need to restrict either the exhaust or induction to keep the turbo from overboosting. I had very similar symptoms to you when I went over to the HKS mushroom and did my custom inlet ducting - the turbo was able to breathe so much more easily.

A boost controller (manual or electronic) won\'t help in a situation like this - the problem is the wastegate is too small, so you either need to port the wastegate or limit airflow in/out to prevent it.

Good article here on 1300cc.com :

http://1300cc.com/howto/how2/creep.htm

m1tch · February 05, 2010, 12:19:50 PM

My stock turbo boosted to about 12psi on the 5psi wastegate spring, get the turbo ported before you lose the engine.

m1tch · February 05, 2010, 12:44:51 PM

Also a glowing red turbo would signal higher EGTs caused by the mix running way too lean, stay off boost until you have sorted this I think.

TiddlesRX7 · February 05, 2010, 03:35:30 PM

Quote from: m1tch;670325Also a glowing red turbo would signal higher EGTs caused by the mix running way too lean, stay off boost until you have sorted this I think.

Don\'t worry I am. Too scared of breaking something expencive.

I have no idea if the wastegate is ported or not. I\'ve never had it in bits. I suspect it is as the previous owner that did the rest of the mods and had the engine rebuilt seems to have done things by the book. Ro-Technics did the rebuild and mods for him. If it hasn\'t been done I will do it myself when I strip the turbo out. Im not sure if its worse in the high gears or not. I backed off cause I got scared!

And as for the bar on the wastegate. Hmm im not sure I can\'t see from the top cause of the heat shields but I\'ll have a gander over the weekend. It could be something like that cause it did just happen overnight. It would make sense thinking about it. I hope it is something like that. Easy fix and cheap!

grinder · February 05, 2010, 05:29:26 PM

i could only see mine from underneath - so try that

TiddlesRX7 · February 07, 2010, 11:52:56 AM

Well guys the bar between the wastegate and the actuator was all connected up so I guess its not that. Could it be that the actuator has failed and isnt opening the wastegate or could it be a faulty pressure sensor? It\'s really begining to bug me this problem.

pdtaylor18 · February 07, 2010, 10:33:56 PM

Let me know what you need as you can have a wastegate actuator and I have a boost sensor if you need that as well. Does the turbo only get red after boost or does it get extremely hot while letting it just tick over for long periods. Its quite hard to get decent boost when not moving as its the load that brings the boost on full. Might be worth deeing if the oil is getting to the turbo. best disconnect at the turbo and see what sort of flow you get after pulling the main egi fuse. This would not explain the high boost levels though.

TiddlesRX7 · February 07, 2010, 10:45:49 PM

It\'s only after its overboosted. Normal conditions its ok. I drove it home after my test run when I notice the glowinmg and when I got back it was fine.
Thanks for the offer Pete I\'ll give you a shout if I need anything.

grinder · February 08, 2010, 09:57:27 AM

i have a boost thing that the fcd plugs into aswell ( if you need to test it )