xedi - turbo solenoid vacuum?

hey up chaps and chapess's

i ust bought an XEDI off a forum member yesterday and .. well its gots issues (not mentioned in the description!)

basically its not boosting and its this wont go above 3000rpm and 70 mph lark. I can hear the turbo spooling up (a bit) but the wastegate actuator doesnt move at all. Theres no vacuum at it when i pull the pipe off. Where abouts does it get the vacuum from... the turbo itself? because i cant find any other pipes etc.

I am probably being a spaz but hey ... its sunday morning!

done a search but struggling to find the exact info i need.

Nodge will know

dont now nodge... im new to this section

I thought he would've answered by now

in L-series wastegate is not controlled by vacuum. Turbocharger control it itself with pressure that it produce. You have a spring inside wastegate. That spring move lever when pre-defined pressure is reached. That's why you have a small "U" pipe between w/g and turbocharger body. Wastegate should open fully on about 17 PSI.

ahhh thats explains why i am being retarded cheers winu.



well there is zero pressure there. Maybe blocked? (ill try blowing it out with an airline) alternative i suppose is the turbo is goosed.

Paul does this mean you're gay now?

SSSHHHHHH dont tell anyone or Ill get nowt but hassle in the tratter section

The tratter world must know!!

Winu said:

in L-series wastegate is not controlled by vacuum. Turbocharger control it itself with pressure that it produce. You have a spring inside wastegate. That spring move lever when pre-defined pressure is reached. That's why you have a small "U" pipe between w/g and turbocharger body. Wastegate should open fully on about 17 PSI.

Click to expand...

So is there anyway to get more out of the turbo? You have yours "tweaked" dot you?
So to change the effectiveness of the turbo you would have to change the spring, if it was possible to change?

In mine almost everything is tweaked .
L-series in that car have simple, good old time static turbocharger. It controls itself by the spring - but it must know what pressure she generate. and this is our back entrance. You need to put a boost regulator valve in to that pipe between body and valve. You set new pressure on the valve (when it opens and put pressure to open wastegate). That is how you can take more from GT15. Also you get more stable boost building because BR pass only when pressure is reached, not earlier. In standard solution valve start to open early and continue that to full open on 17 psi.

@vilguy , if it will be blocked you will get overboost. You got no pressure in pipe (and in engine) because wastegate stuck open, and exhaust don't "feed" turbo.

aahhhhh ok!

i couldnt move the waste actuator with my hand so i imagine its seized then.

even if it will be new, you can't move it by hand... test it with compressor.

ah well i just moved it with a spanner. Seems freeish. Ill get the compressor on it tomorrow and see what happens

cheers

cant believe it was such a simple fix...

Id had the mrs rev it the other day whilst under the bonnet and i couldnt see the turbo actuating so i assumed a turbo issue....

well, yesterday i got her to rev the tits off it and as she did i watched the inlet pipework close up! Turns out the airfilter was more blocked than a nuns crack. Air filter out and it runs perfect!

Never had that before!

As the previous owner was obviously too feckin tight to even put a £4 airfilter in the thing, Im going to give it a bloody good service this weekend!

Different car though now

I feel a bit retarded for not realising what it was of course heh