911 2

need to adjust the valves very soon and as the wastegate has to come off i thought id replace it with a tial item in doing so what benefits are there and do i just look for a 46mm tial wastegate is it just bolted straight on

bogey1

They look like a piece of Art work, if nothing else!

Flachbau

1. More efficient (does not have any measurable stiction and operates without flex under high heat conditions).

2. More accurate (springs are precision made and heat resistant so they actually produce the boost rate they are made to produce - as compared to stock Porsche springs which may vary by +/- .05 bar).

3. Zero overboost (holds the actual boost rate of installed spring(s) - see #2 above).

4. More spring choices (for 1.0 bar Tial requires the use of a .8 bar-large green and .2 bar spring-small yellow - I run this setup).

5. Agreed, it is a piece of art and there are 5 color choices.

Yes 46mm and make sure you get the narrow body version for the 1975-1994 911 Turbo and if running 1 bar get the highpressure model.

Check out this diagram for installation - it is a direct bolt on application.

http://www.tialsport.com/documents/w..._wginstall.pdf

Turbohead

Flachbau,
Do you know?
I have a blue spring for My tial ...what is the spring boost rating for this one.
Elliot

Flachbau

Small blue 0.5 bar
Large blue 0.9 bar

You probably have the large blue

Check this link... http://www.tialsport.com/documents/w3_tial_46_sp.pdf

Turbohead

Thank you,
Elliot

911 2

the one i have seen is a sr20 rb26 s13 tial wastegate dnt know if this will fit the 1991 turbo any ideas heres a few pics

911 2

few more pics

Flachbau

If it is a Tial it must be old because it is not a model that they currently offer.

MarkRobinson

The factory has worked perfectly for me, 60k miles on 1.2 bar, 387/423 to the wheels.

I have the Tial 46mm on my 928, works great, but pricy. 38mm is more than enough for our cars & stock CIS. Get a 44 if you're worried about boost creep, those are sized for 700+hp engines.

Porschefile

911 2, that sounds and looks like some taiwanese Tial knock off. I say "sounds" because all of those mass produced taiwanese/chinese knockoff products seem to have the same general Ebay item name. This is happening alot lately with common brand name products like HKS ssqv blowoff valves, japanese car suspension components, etc. The housing on a tial 46mm isn't completely round like this one. Here's a pic to show what I mean

See how the housing has little "nubs" for the bolts. That's what a real Tial 46mm looks like. I would stay away from those ebay ones, as theres no telling what kind of quality they are. Worst case is a blown engine if the wastegate siezes shut and you overboost.

nathanUK '81 930 G50

Also in blue !

911 2

cheers your info is very much appreciated do want to blow my engine

Ag02M5

Is there a part number or a link to help reference? Want to get the exact part.

What about going to 50mm? Would that cause issue?

Thanks.

RT

nathanUK '81 930 G50

Just order it from www.imagineauto.com