26 lbs boost, head gasket...poof

[rodpaslow]

The VNT 17 is not going to be much of an improvement over the 15 if the turbine section is the same size, other than at the same turbo speed it will be producing slightly more boost.  I wonder, is the hybrid 17/22 the same?  It uses the 17 turbine section and the 22 compressor?

[R.O.R-2.0]

The VNT 17 is not going to be much of an improvement over the 15 if the turbine section is the same size, other than at the same turbo speed it will be producing slightly more boost.  I wonder, is the hybrid 17/22 the same?  It uses the 17 turbine section and the 22 compressor?

correct..

[RabbitJockey]

from what i understand the 17 has a larger inducer on the compressor, it would in theory spool up a little slower because it is moving more air and doing more work on the intake side for every revolution, at higher rpms the 17 would be more efficient so at higher rpms the turbine would be doing less work to move the same amount of air at higher flow rates, creating less back pressure and robbing less energy from the engine to create the same amount of air flow.

[rodpaslow]

Yeah I found some pictures showing the difference, the 15, 17 and 20 (this picture showed 20 not 22) and the compressor wheels just increased in size from one to the other- the VNT 15 has 33mm wheel, whereas the VNT-17 has a 1.435" (36.449mm) wheel and 20 is larger than that.

I have a feeling it will be hard to find a vnt that has the same inlet and outlet and same bolt pattern, etc to fit my car.  I think I'm going to buy a VNT17, not the hybrid, and see how it works out.  I don't plan on running much over 20 psi, so it will be a good match for that.

[rodpaslow]

We had some awesome weather this weekend so I had a chance to work on it.  I sprayed some of the hylomar onto the head gasket (sticky stuff after it partially sets) set it in place on the block and put the head on and step torqued it up to 100 ft.lbs.  Then I quickly connected all the coolant stuff to the head and filled it with coolant so I could use the block heater (still -1°C or about 32°F) to heat the block.  After block was warm to the touch I torqued all head bolts to 110 ft.lbs. (these are ARP head bolts). 

I don't have the turbo yet to continue, but so far so good.  This seemed easier - better be as it's second go round.  I hope the Hylomar seals any minor difference in surface like a fibre head gasket would.  I so much like the steel head gasket.  It just seems better than any fibre gasket that originally came on a 1.6.

[R.O.R-2.0]

We had some awesome weather this weekend so I had a chance to work on it.  I sprayed some of the hylomar onto the head gasket (sticky stuff after it partially sets) set it in place on the block and put the head on and step torqued it up to 100 ft.lbs.  Then I quickly connected all the coolant stuff to the head and filled it with coolant so I could use the block heater (still -1°C or about 32°F) to heat the block.  After block was warm to the touch I torqued all head bolts to 110 ft.lbs. (these are ARP head bolts). 

I don't have the turbo yet to continue, but so far so good.  This seemed easier - better be as it's second go round.  I hope the Hylomar seals any minor difference in surface like a fibre head gasket would.  I so much like the steel head gasket.  It just seems better than any fibre gasket that originally came on a 1.6.

where is everyone finding BOLTS?! i thought ARP only had studs out for our engines?

[rodpaslow]

Oops, I mean to say studs not bolts, my bad!

[R.O.R-2.0]

Oops, I mean to say studs not bolts, my bad!

its ok, i just keep seeing everyone talking about these ARP head bolts, and i wanted to figure out if it was just a small mistake, or if ARP actually did make some head bolts that i didnt know about..

thanks for clearing that up!

[rodpaslow]

I finally bought a vnt 17 turbo and it's on its way.   

I have received a couple AN -10 fittings and hose I want to install this weekend, I can use the turbo I blew up as a mockup and get the drain better than it was with just a hose and clamps.  This way it always leaked a bit - the AN fitting and 350+° braided line hose should fix that.  I will have to weld a -10 fitting to the tube that connects to the oil pan, but that shouldn't be too hard.

[Swartzvw]

I finally bought a vnt 17 turbo and it's on its way.   

I have received a couple AN -10 fittings and hose I want to install this weekend, I can use the turbo I blew up as a mockup and get the drain better than it was with just a hose and clamps.  This way it always leaked a bit - the AN fitting and 350+° braided line hose should fix that.  I will have to weld a -10 fitting to the tube that connects to the oil pan, but that shouldn't be too hard.

Thats what I used on mine as well, except I didnt have a turbo oil pan so I just welded a bung onto the pan. Has worked well so far. Is yours a GT1749VA?

[rodpaslow]

No the one I bought (I think has arrived today) is a GT1749VB.  It's too damn cold to do any work on the car right now (unheated garage).  I hoping to use the stock drain with the -10 fittings.  I wasn't counting on the fittings being as long as they are.  I hope I have enough distance between the -10 JIC nipple I weld onto the stock tubing and the bottom of the turbo drain.  Turbo drain side I just plan to tap a fitting onto it and then connect the AN fittings.  We'll see how much hose I need, but I bet it won't be any more than about 5".

I'll post a picture once I unpack the turbo.  I hope it warms up next week so I can install it.

[Swartzvw]

I used something like this for the drain on my turbo, just measure the bolt hole spacing. It has worked well.

http://www.ebay.com/itm/Turbo-Oil-Return-Drain-Flange-Kit-AN10-1-2-PT-KKK-K03-K04-Audi-Mitsubishi-TD02-/120836120603?pt=UK_CarsParts_Vehicles_CarParts_SM&hash=item1c2264e01b

[rodpaslow]

the one you posted won't fit a vnt.  I'm 99% sure the spacing looks to narrow.  However the JIC/AN fitting looks like the size I plan on using.

[Swartzvw]

Well I used something like that, Im not sure that that is the exact one I used and mine is a vnt17 as well. I was just trying to say that something like that is an option.

[rodpaslow]

I finished installing the turbo this weekend and may have a problem with the drain.  I fitted a 3/8 npt fitting to -10 Jic/AN the turbo oil plate and to the oil pan (bought a new oil pan;old one is for sale cheap if someone needs one),  I used an fittings to go to those fittings- I used a straight coming out of the turbo and a 90 deg going into the oil pan.  It's very close to the drive shaft once installed.  I fitted the shaft in place and lifted the right side of the car with my jack, and it gets within less than 1/8". 

This is a bit close for comfort, maybe once I test it, it may be okay, but I don't think so.  Is a 90 deg female -10 to male fitting less distance center to center than the 90 deg hose fitting I'm using?