2.2 Turbo...

[dewismotorsport]

Vacuum on and off does make a difference. I've always set my adjustable FPR with it off personally

 

[TFD]

Vacuum on and off does make a difference. I've always set my adjustable FPR with it off personally

That is how it is suppost to be done.
As long as everybody talks about the same it doesn't really matter, but this can be confusing some times.

 

[Dave Gilbert]

Hi@TFD

Carl has just made me panick about water supply or return.

where are you running your water pipes? I know you said about the bottom of the water pump but wheres the other going?

I was going from the front like this
It runs round the side of the engine and round the back to the turbo.

Do you know if this is a feed or a return?

I was going from here and bottom of the water pump. Cheers

 

[TFD]

Hi Dave,

haven't figgered out the return myself. On Cobalt forum they say to route it back into the line from block to expansionbottle but I'm not 100% sure if that is the correct way.

Waterfeed comes from the bottom of the waterpump (the drainbolt). Put a m12x1.5 banjo in there and your set.
Will let you know when I'm 100% on the returnline.

 

[Dave Gilbert]

So the bottom of the water pump is good for a feed(thats all I need to know. I have the return.

That picture I put on my last post is the standard water pipe for the z20net it T's off to go round the side n back to the turbo.

So maybe of some use to you aswell.
I will get a pic of the full pipe work when I get it off.

cheers im relaxed now haha.

 

[evocarlos]

why would you panic ive alrady sent you the water flow diagram
water in from the front pipe and water return at the thermostat housing pump side so it has suction

 

[Dave Gilbert]

Cos im scared haha. So I have two feeds? Is that what your saying.

ahhhhhhh.

 

[dewismotorsport]

Why not just use the small return pipe off top of rad as a feed and then return back to header tank?

That's how my C20LET feeds my Garrett GT3076R

 

[TFD]

Finished the log-manifold today:

Will make a mall tomorow for a future tubular manifold. Log wil do the trick on a T25 for now.

Got about 20mm space between driveshaft and turbo. Should be enough with a heatshield.

Off now making braided lines and AN fittings...

 

[Dave Gilbert]

Nice work there, looks tight haha

iv just ordered my last few AN fittings

Iv just got to figger out the breather/vacuum pipe on the rocker cover.

n get oil, filter and coolant n sump gasket.

then im ready to build. Nice 1 looking good

 

[TFD]

You can 1) leave the breather on a catchcan with a filter and be done with it, or 2) route it back into the intake manifold (use a one-way valve!!!!)
I block the hole between runner 2 and 3 (intake side) and gonna do the above. Not sure now what is best.... let you know when I figgered it out.

Some more close-ups:

 

[TFD]

Ok... one more time on coolant lines.
I'm getting a bit mixed up cause a VX may have a bit different lay-out as other vauxhall's... Not allways sure how to see the pics etc.

So here's the schedule from MarkV on the VX coolant flow:

For the idea: Rad is in the nose. Temp sensor is on the exhaust side of the engine (so at the back of a VX)


A) If I am correct, the z20net has a return in the "main outlet"? Correct?
B) The US Cobalt guys say to put the return into the "secondary outlet", straight back to the reservoir. I think this would not be such a great idea since you are warming up the cold water that is suppose to cool the engine (warm out and warm in....). Correct?
C) Tapping into the thermostat means you recirculate the hot water into a cold circuit and putting hot water into the engine. Not that good. Correct?

I would go with option A. Any comments on this one?

 

[Dave Gilbert]

Theres a picture on my thread somewhere, showing the pipe on the z20net n z22se.

Al find it(iv emptied all my photos off my phone)

 

[Dave Gilbert]

cant find the pictures on my thread, but heres a pic of both



z20net water pipe


z22se water pipe.

 

[TFD]

Yup.. got it. So option A) it is. Gonna get this:

Thanx

 

[Dave Gilbert]

That looks special n its ironised blue so probably expensive. Does that give you a T piece then? (Pictures not that clear on my phone)

 

[TFD]

Cost you a tenner(ish) and has a 1/8 npt gauge hole to connect the waterline to (get a 1/8 to 6an adapter).

 

[Dave Gilbert]

So that would be for a aftermarket temp gauge but your using it for a feed or return from the turbo?

Good idea.

With mine it will look standard at the front, all the heat shields will cover most of the braided hoses and sexy fittings at the back(shame).

 

[TFD]

Modified the OEM heatshield and looks and fits fine so far:

Drilled my banjo bolt to 1.5mm as a oilrestrictor for the non ballbearing turbo:

Got myself a 2.5" Imhof backbox so now I can sort out the rest of the exhaust.

 

[TFD]

No fancy expensive intake adapters.... Exhaustflange and 2" bend seems to work better:

Intake testfit. Maybe some heatfoil needed due tranny

Upgrade the OEM turbo u-bend to a 2,5" u-bend

Make space for the Saab intake

Shiny stuff

Get some more exhaust parts and of we go for some welding.