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jg4454 · Joined: 07 Dec 2004 Posts: 34

I've seen aftermarket wastegates a.k.a. diverter valves for sale, and I wonder if a 931 wastegate with a blown diaphragm might better be replaced by an aftermarket unit than rebuilt. Any experience would be helpful, with a special eye on cost.
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"Speed is a matter of dollars. How fast do you want to go?" - Somebody said this in Road and Track once.

J1NX3D · Joined: 06 Feb 2003 Posts: 1333 Location: New Zealand

i hear Tial wastegates are good and a few 951 guys on rennlist upgrade to them but i have no idea whether ours are ok for a few hp upgrades so i'd be interested in answers to this question too!
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'86 944

924guy · Posted: Sat Feb 19, 2005 9:53 pm Post subject:

pondering the same thing myself, especailly since wy wastegate is currently sitting on my garage floor.. im still waiitng on prices, but it looks like its going to cost about $150-$200 to replace the diaphram and upgrade to a 1 bar 930 boost spring, doing the work myself..from what i gather so far, an aftermarket w/g is going cost about twice that, and would still need modification and custom pipe work to fit, but im not sure.. but if thats the case, rebuilding the factory part seems the better option..I cant really see the sense in investing $300-$500 for what is in effect, a pressure bleedoff valve (and i think its silly that the diaphram alone is over $100 for the stock part)
the aftermarket ones look pretty, but then again, their tucked so far up under the car, pretty doesnt matter.....
some hard info on this would be helpfull though..
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Eric
78 924
82 931 SE "smokey"
99' VehiCross
Y2K Honda Insight
http://www.cardomain.com/id/924Guy
Performance by Pasha

Vince Ponz · Joined: 02 Nov 2002 Posts: 3581 Location: Florida

Some parts I buy from my Porsche dealer.

Eric give me a list and part numbers of parts and I will check the cost at Silver Star.
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"Never let them see you sweat"
77.5 924 modified track car
79 931 Euro stock
88 924S SE
87 911 Targa stock

Zuffen · Posted: Sun Feb 20, 2005 1:32 am Post subject:

Andial for the wastegate bladder.

They have two types

black rubber stock 50 bucks

white teflon race 75 bucks

that was several years ago
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Bob Dodd - 924turbo@cox.net
931 1982, 944 1982 euro, 924S 1988SE, 93 968 tip 06 Silver Cayenne S, 06 Black Cayenne S

I have Way too many cars, parts for the 931,944 and 951

Alex Roy · Posted: Sun Feb 20, 2005 2:34 pm Post subject:

I second Bob on andial. I ordered one from them and it came in less than a week. Their website is www.andial.com

924guy · Posted: Wed Feb 23, 2005 3:46 am Post subject:

just ordered both the 1 bar spring and the diaphram,from Andial- $110 for both ($50 for the spring, $60 for the diaphram), forgot to ask how much shipping was, but i went ground so it shouldnt be bad..
thanks for the info guys!
_________________
Eric
78 924
82 931 SE "smokey"
99' VehiCross
Y2K Honda Insight
http://www.cardomain.com/id/924Guy
Performance by Pasha

jg4454 · Joined: 07 Dec 2004 Posts: 34

You can get one of the gaskets from ThePartsBin.com. The other parts are dealer only, so far.
_________________
"Speed is a matter of dollars. How fast do you want to go?" - Somebody said this in Road and Track once.

Rasta Monsta · Joined: 12 Jul 2006 Posts: 11733 Location: PacNW

Look out guys, I am reading a bunch of old threads, and am likely to revive some crusty ones.

924guy, how did this go??

rasta

Kenodog · Joined: 25 Jun 2003 Posts: 2669 Location: Vancouver,B.C.

Geez it's Alex.Where you been ?
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1979 Euro 931, Olive
1981 931, Sabine
1991 Ford Ranger XLT 4x4, Ricky
1996 Ford E-350 ex-FedEx Van
2014 Mazda CX-5 (Kinderwagon)
2019 KTM 790 Adventure
2024 KLX300
2024 KLX140

bass gt · Posted: Tue Aug 01, 2006 5:59 am Post subject:

Guy's,

trust me, the stock item is perfect. Don't forget, it's a 911 turbo unit. As long as it is in good order, stick with it. And it is ready to run in dual port mode straight away. A Tial dual port WG is $$$$ and of no benefit. Trust me onthis one, i think i know....

Steve

Lizard · Posted: Tue Aug 01, 2006 7:45 am Post subject:

macBdog · Posted: Tue Aug 01, 2006 10:18 am Post subject:

When I rebuilt my turbo and wastegate I went shopping for 'gates to a number of different reputable turbo shops. They didnt know the car too well so I bought in the wastegate and everyone of them said something to the effect of "no way, stick with the gate you have, that is better than anything you will be able to buy from us".

I think someone has already mentioned that it is the same wastegate as a number of other famous turbo porsches, 933 maybe?
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1979 931 with a 350 chev
1973 911E with EFI

Raceboy · Joined: 01 Mar 2004 Posts: 2327 Location: Estonia, Europe

It's the same wastegate as 930's have, the code is the same also.
Stock unit is fine with it's 38mm valve and good healthy spring (and dual-port capability as Steve pointed out).
I will use it even when i'll be fabricating my own custom exaust manifold somewhere in the future.

Don't forget that 951 has really crappy wg, that's why they upgrade it to Tial or if one hasn't got money to throw, an Audi unit is actually very good wastegate too.
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'83 924 2.6 16v Turbo, 470hp
'67 911 2.4S hotrod
'90 944 S2 Cabriolet
'78 924 Carrera GT replica
'84 928 S, sold
'91 944 S2, sold
'82 924S/931 "Gulf", sold

'84 924, turbocharged, sold.
http://www.facebook.com/vemsporsche

924guy · Posted: Wed Aug 16, 2006 3:26 am Post subject:

i stuck with the stock w/g and upgraded to the 1 bar spring, works great, just have to go easy as even with a dial boost control cranked way down, i can still hit the overboost cutout rather quickly. im expecting more drivable results when i get the intercooler project finished though. i will say that it when it hits, it hits hard, and its basically the definiton of seat sucking power, but real easy to blow things up too, so i wouldnt recommend doing it without an i/c or a strong desire to make your powerplant go boom

_________________
Eric
78 924
82 931 SE "smokey"
99' VehiCross
Y2K Honda Insight
http://www.cardomain.com/id/924Guy
Performance by Pasha