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Smart quod bastardus
 
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Join Date: Oct 2002
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tial versus factory wastegate

What makes the tial such a popular upgrade over the factory wastegate?
I mean can someone list the clear advantage of a tial W/G over a good functioning factory W/G?
If you had a choice to rebuild the OEM unit by replacing the diapragm, is it cheaper and work as well and save the expense of a tial? Or is there some clear advantage of the tial worht the money for it?

What size tial is proper for the 3.3 liter engine?
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1979 930 Turbo....3.4L, 7.5to1 comp, SC cams, B&B intercooler, Snow Perf water/meth injection, Rarlyl8 headers, Garret GTX turbo, 36mm ported intakes, Innovate Auxbox/LM-1, custom Manually Adjustable wastegate housing (0.8-1.1bar),--running 0.7bar max
---"When you're racing it's life! Anything else either before or after, is just waiting"
Old 02-23-2008, 05:51 AM
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46mm TIal will fit bolt on. I can't answer the advantages....I have one because my stock unit is seized to the factory headers.
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1987 930
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Old 02-23-2008, 05:58 AM
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Crotchety Old Bastard
 
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This is my opinion only.
TiAL is modern looking, very nicely made, works well, and looks fantastic.
Stock is stock looking, usually worn out, and looks stock.
I rebuilt my stock unit and it has worked perfectly for 5 years. I also tried out a TiAL. It worked perfectly as well and looked real nice doing so.
So, for me, it is a question of aesthetics.
46mm is stock 930 sizing.
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RarlyL8 Motorsports / M&K Exhaust - 911/930 Exhaust Systems, Turbos, TiAL, CIS Mods/Rebuilds
'78 911SC Widebody, 930 engine, 915 Tranny, K27, SC Cams, RL8 Headers & GT3 Muffler. 350whp @ 0.75bar
Brian B. (256)536-9977 Service@MKExhaust Brian@RarlyL8
Old 02-23-2008, 05:59 AM
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I believe major (only?) advantage is price. Last time I checked, Porsche wanted 1300 euro for new wastegate.

OEM works nice as well.
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Old 02-23-2008, 10:12 AM
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The Tial uses a metal piston, and stock Porsche wastegates use something like a nomex reinforced rubber/silicone diaphram to operate the valve.
The Tial is a newer design and may be more efficient and reliable, and springs and parts for them are cheaper and easier to get.
and,
The clear or color annodized machined housing of the Tial looks nicer than the rough cast housing of the origonal to most people.

I have a nicely made $79 chinese 46mm Tial copy that came with a polished stainless dump pipe and it also uses the silicone/nomex diaphram but I have not installed it yet since the origonal one works fine.
It's amazing how well it's made at it's price, and I'll probably try it someday
Old 02-23-2008, 10:43 AM
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JFairman..

Was your's a score from ebay or id there somwhere in particular you ordered it from?

Thanks
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Old 02-23-2008, 12:48 PM
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I got it from this website.
http://ssautochrome.com/level.itml/icOid/1544
Scroll down and the 46mm are at the bottom of the page.

Jim
Old 02-23-2008, 01:00 PM
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Tial's are all stainless construction and machined to the tightest of tolerenace's.. Also better flowing .. I use one but I needed to buy one anyhow regardless it works flawless. and would not have it any other way.. Plus I sell em so must be a biased thing
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Old 02-23-2008, 01:48 PM
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Ben, can you pm me with pricing?
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Old 02-23-2008, 02:00 PM
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Crotchety Old Bastard
 
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If you want to do a comparison between the Asian W/G vs TiAL it can take up another lengthy thread. I bought one just for that reason. Not too impressed. The TiAL unit is a work of art.
It won't be protecting my expensive engine any time soon.

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RarlyL8 Motorsports / M&K Exhaust - 911/930 Exhaust Systems, Turbos, TiAL, CIS Mods/Rebuilds
'78 911SC Widebody, 930 engine, 915 Tranny, K27, SC Cams, RL8 Headers & GT3 Muffler. 350whp @ 0.75bar
Brian B. (256)536-9977 Service@MKExhaust Brian@RarlyL8
Old 02-23-2008, 02:04 PM
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The only real practical difference I found was that with the TiAL you can readily source alternative springs which I couldn't do with the factory WG. With my application I use a very soft .5 B spring and an electronic boost controler to fine tune the amount of boost that I want. I was having a hard time limiting boost prior to introducing the boost controller to the setup. I also like being able to have a full boost setting and a limited (less than optimal weather/track conditions).
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Old 02-23-2008, 03:15 PM
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Quote:
Originally Posted by JFairman View Post
I got it from this website.
http://ssautochrome.com/level.itml/icOid/1544
Scroll down and the 46mm are at the bottom of the page.

Jim

Thanks Jim...
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Old 02-23-2008, 03:40 PM
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Macht Schnell
 
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Hello,
When I was rebuilding my Motor, I was told it was cheaper to buy a TIAL than rebuild the stock WG, especially if you added spring cost to the mix. I was also told that the stock parts were hard to come by.

Also, I got a Red TIAL to accent my red accented engine. I'm not sure I would choose a cheap wastegate for a engine worth $10-50K depending on where your engine is. The TIAL works Flawlessly. Very predictable. I've never heard anyone say theirs was stuck.
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---Les Garten---85 930, Andial IC, GHL Headers, Fabspeed Dual, K-27 HF2, 3.4 JE Full Finned 7.5:1 CR, 964 CAM'd, Carerra 3.2 Manifold Cut/Flipped, Tec3r, Siemans 55#, GSF Fuel Rails, Clewett Crank Trigger, Clewett Cam Trigger,Dual Plugged, ARP Head Studs/Rod Bolts, Clewett Wires.Tial 46mm WG, Tial 50mm BOV, WEVO Shifter,934 Boost Gauge, Wideband EGO Sensor/Gauge, C2T Head Gaskets, '88 MB 300TE,BMW R100RT
Old 02-23-2008, 05:10 PM
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