GT2052S project thread number three

[306Puggy]

Man, the last four days have been stressful. I have done nothing but work on my car, day in, day out. Today I had my first drive of it, unfortunately the results are less than encouraging

The whole car vibrates with the turbo against the bulkhead despite my bashing and drilling.

Then there's the noise which is loud not in a good way. And because there is no exhaust on the fumes are nauseating.

All this wouldn't have been too demoralising but the turbo only seems to provide about 2 psi of boost, something is wrong there. I have blocked the petrol gubbins at both points on the compressor housing.

The wastegate is closed from what I can tell, with such a lack of boost it would have to be noticeably open anyway, wouldn't it?

I noticed when the engine was idling with the intercooler off that the turbo seemed to provide a very weak blow for some reason. Way weaker than the K14 at idle, so this rules out there being some sort of boost leak at the intercooler/inlet mani.


I got my exhaust elbow sorted so now am able to give it some throttle (hence my discovery of the lack of boost) and it set me back 30 quid! I can't get any more exhaust work done if it is going to cost that much each time. It seems that the boss of the garage has changed and is now forcing the mechanics to charge full price for everything. So I do potentially need a way to sort an exhaust without welding.

These are the holes I drilled into the bulkhead, first one was in the wrong place:



This was the kit I used to make them:



This is how much the welding cost me for one thing:



Now you can see why I need an alternate method to one that involves welding.

With the turbo boost problem I am afraid of it being something like, I dunno, the turbo to adapter plate or adapter plate to mani surfaces not sealing. Or the hole in the adapter plate being off centre and thus slowing the exhaust gases down, or something else obscure and damn near impossible to fix without taking the whole thing off.

I am probably gonna have to remove the wastegate and try it with the wastegate arm wedged somehow to stop it from opening and then if it still doesn't make boost something is very, very wrong.