Chris White

Yep, the most recent Tial waste gates have a water cooling provision that allows them so be smaller (no cooling fins). They also have vband clamps that make it much easier to install and remove them.

The wastegate in the picture is a 44mm wastegate!

URG8RB8

Chris:

Nice, exactly what I was referring too! By the way, since you did/do a lot of business with SFR, do you know who's car is n the picture above? That is a beautiful motor.

Dutch944

I have the same, check a view pages back and you'll see my current WG, it has also the possibility to watercool it!


***Nevermind; here is the picture of the newest Tial 44mm WG:




@Chris; i'll get the bellows this saturday as well as the other vband flanges so we can finish the crossover pipe!

Dubai944

^^ Man, those new smaller wastegates are huge.

Chris White

I remember seeing some pictures of it quite a while ago but never heard anything more about it.

Thom

If the WG is located for example right behind the turbo directly on headers I could understand the benefit of a smaller WG lung and the need to cool it down because it's very close to the engine, but on our cars, routing coolant lines down to the WG all the way through the various heat points of the engine adds potential issues more than additional space of a smaller WG lung, that is actually not that much smaller than on a std Tial of the same valve size.

Chris White

Proximity to the engine is pretty much meaningless for a wastegate. The exhaust gases do not cool down by the time they have traveled a couple of feet to the wastegate. (BTW - mounting the wastegate behind a turbo doesn't work so well!).

Using the water cooling feature is optional, I won't use it on the street car but would use it on a track car.

Here is a picture of the full Tial line - the second from the left is the wastegate that I am using and the second from the right is the 'old' air cooled version. The size difference in person is more noticeable!

perhaps one of the best features is the V band clamp mounting. Much nicer to work with than the bolt in version - due to the heat those bolts are the first thing to seize up!

I have not heard the term Wastegate 'lung' before, interesting term to use to describe a wastegate.

Chris White

Make sure you get the bellows that are rate for high heat AND pressure. Many of them are not suited for preturbo use and will not last long in the cross over pipe.

Chris White

If you look at the full line picture I posted you can see that the ports are much bigger than the old style wastegate. 2nd from left is a 44mm valve and the 2nd from the right is a 46mm valve - but the 44mm valve has much bigger ports!

See - smaller is bigger!

Thom

Ok, so basically Tial came up with this water-cooled lung because the valve guide could stick under prolonged exposure to heat. I wasn't aware it was a problem on track cars. It sort of suggests the stock WG design is superior for handling heat.

Dutch944

I will and have already found them!

Chris White

Sort of - if you mean the stock Porsche wastegate then it cannot handle the heat of a high power motor at the track. If you mean the original Tial wastegate the yes, it san handle the heat OK - but the new wastegate is smaller and less expensive. The MVR (44mm) is about $350 and the older 46mm is about $525. In addition the MVR comes with all the V band flanges, multiple springs and all connectors.

Tial came up with the new design for applications where space is at a premium. In addition racers are getting more and more into aerodynamic set ups - which means less airflow around the wastegate.

In my case the 968 bellhousing does not allow for the 951 style placement of the wastegate.

Dubai944

Got it!

Actually I was referring to the size of the posted picture which is about 5 miles wide on my screen and takes 5 minutes to load.

Chris White

dial up connection?

kont5u

Bas, it seems like no deck plate was used while machining the cylinders on your block? I'm going through the same process in the near future but my concern has mostly been related to the need of a costly deck plate while machining to prevent the cylinders from deforming after cylinder head has been installed. I have understood it should be used for machining a 2,5 l block, but not sure if it is necessary for the 3,0 l block machining.

Does anyone know if it should be used for dry sleeving a 3,0 l block? Anyone have experience doing that? I know at least Duke has dry sleeved his 3,0 l block, but any knowledge how that was carried out?