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Twins are more fun!
Join Date: Dec 2005
Posts: 639
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What aftermarket wastegates are you guys running?
I know of the Tial units, but they are expensive ![]() The OEM ones look big and HEAVY ![]() Anyone used the JDM or XS Power 46mm Wastegates, or have any experience with them?
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James Carrera TT (3.3, Protomotive MAP ECU, EFI, GT2 EVO CAMs, Twin Plugged, Twin Turbo's) Last edited by JMA-RUF; 01-31-2007 at 03:08 PM.. |
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Join Date: Jun 2004
Location: Austin, TX
Posts: 149
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I'd stay away from those Taiwanese/Chinese knockoff wastegates you can find on Ebay. They are inferior quality and I've heard of many problems associated with them, such as failing in the closed position, not sealing properly (poor wastegate to seat clearancing), etc etc. Japanese wastegates like HKS, Trust (Greddy), etc are all pretty decent quality and work well though no one compares to Tial IMO. Honestly, I'd just spend the money on a Tial as it's the last wastegate you'll ever have to buy.
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Twins are more fun!
Join Date: Dec 2005
Posts: 639
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Hmmm.. I guess the wastegate does an important function, so probably best not to skimp there, for the sake of a few dollars
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James Carrera TT (3.3, Protomotive MAP ECU, EFI, GT2 EVO CAMs, Twin Plugged, Twin Turbo's) |
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Registered User
Join Date: Jun 2006
Location: Ballston Spa, NY
Posts: 528
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Yes....inferior/cheap wastegate = poor performance = possibly sticking and boost overrun = expensive collection of metal behind you..... Tial, a bit pricey but you get what you pay for.
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Adam Hennessy |
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Join Date: Dec 2004
Location: Danville - CA
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James... I am taking off my TiAL and will be selling it. Has about 3000 miles on it and comes with a variety of boost springs.
Let me know if you may be interested.
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Rob Montgomery '88 Blk/Blk 930 ('Lucy') - Not Stock & Not Running |
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Location: Sweden
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I find OEM wastegate very good. It's rebuildable and big enough to support really big HP-numbers.
Smaller wastegates will work, but there is a chance of running into problems if you start using big turbochargers and less-restrictive exhaust. The less backpressure you have pre-turbo the bigger wastegate you need to re-route the gases around turbo.
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Thank you for your time, |
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Join Date: Mar 2002
Posts: 3,563
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Was the factory spring 0.7 or 0.8bar?
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Merv '89 911 Turbo Cab Protomotive MAP ECU, Twin Plugged Heads, GT2-EVO CAMs, 3.3L fully finned P&C's, ARP fasteners, C2T head gaskets, Titanium Retainers, Turbo spec valves, springs & guides, 964 splash valves, GT35R BB turbo, GSF Stainless Headers, Magnaflow Exhaust, Full bay Intercooler, TiAL 46mm w/gate, TiAL 50mm BOV, Apexi AVC-R EBC, SPEC Stage3+ Clutch kit, Crane CDI Ignition ![]() |
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Re: Wastegates?
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Adam Hennessy |
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cool - for some reason I always thought the stock 930's had 0.8bar springs
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Merv '89 911 Turbo Cab Protomotive MAP ECU, Twin Plugged Heads, GT2-EVO CAMs, 3.3L fully finned P&C's, ARP fasteners, C2T head gaskets, Titanium Retainers, Turbo spec valves, springs & guides, 964 splash valves, GT35R BB turbo, GSF Stainless Headers, Magnaflow Exhaust, Full bay Intercooler, TiAL 46mm w/gate, TiAL 50mm BOV, Apexi AVC-R EBC, SPEC Stage3+ Clutch kit, Crane CDI Ignition ![]() |
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Im not sure if anyone has or makes the next generation of blowoff valves and wastegates, In our never ending quest for power with our new race car we came across a company that is making this products like I have never seen them before, they actualy use a valve with a valve seat and a valve guide.
we will be testing them and we see the results. Externally clock able pressure ports- For ease of installation 2.25" V-band connections- For 2.25" OD pipes and tubing (2.125" ID). Includes clamps and flanges 60mm SS valve- Big enough for even the largest turbochargers holding low boost Silicone O-ring and piston type actuator- For long cycle life and easy track side repair if needed.All CNC machined construction- For style and excellent tolerances 3 Series SS valve housing- For excellent corrosion resistance Nickle Aluminum Bronze valve guide- For very high exhaust temps and anti-seizing properties V-band actuator fastener - For quick and easy service Includes - Std., Medium, and Large springs ![]()
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10.76@139-1/4 mile 0-1 mile 193MPH I Love to Shine Cars ![]() |
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Adam Hennessy |
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Maybe the 930's were 0.8bar and the later 965's were 0.7bar?
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Merv '89 911 Turbo Cab Protomotive MAP ECU, Twin Plugged Heads, GT2-EVO CAMs, 3.3L fully finned P&C's, ARP fasteners, C2T head gaskets, Titanium Retainers, Turbo spec valves, springs & guides, 964 splash valves, GT35R BB turbo, GSF Stainless Headers, Magnaflow Exhaust, Full bay Intercooler, TiAL 46mm w/gate, TiAL 50mm BOV, Apexi AVC-R EBC, SPEC Stage3+ Clutch kit, Crane CDI Ignition ![]() |
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Location: Sweden
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1. There is no "speed quest" in designing BOV's and wastegates. BOV is active only during throttle liftoff and is kept shut during accelleration. It doesn't "provide speed" in any way. Unfortunately, it provides millions of youngsters a chance to dream about being one of characters in Fast and Hilarious when they drive around in their sneezing VW 1.8T's. When it comes to wastegate, it just opens a valve and let the gases go around the turbo. Albeit wastegate is more critical from material standpoint then BOV, I really don't think engine will notice if 40mm valve is OEM or Greddy or chinese copy or whatever. It's just a valve.
2. Installing harder spring in wastgate in order to raise the boost is not recomended. It's much better to keep OEM 0.7 bar spring and raise boost trough boost controller or T-orifice. That allows you to go back to stock setting if needed w/o tedious process of opening the wastegate and swapping the spring.
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Thank you for your time, Last edited by beepbeep; 02-02-2007 at 02:49 AM.. |
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Totally aree BeepBeep... what I'm trying to determine is whether the OEM wastegate was preset to 0.7 or 0.8bar. This is for a friend's high compression bolt-on setup. The difference in 2psi can blow his engine, so I need to know if the OEM setup was 10psi or 12psi
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Merv '89 911 Turbo Cab Protomotive MAP ECU, Twin Plugged Heads, GT2-EVO CAMs, 3.3L fully finned P&C's, ARP fasteners, C2T head gaskets, Titanium Retainers, Turbo spec valves, springs & guides, 964 splash valves, GT35R BB turbo, GSF Stainless Headers, Magnaflow Exhaust, Full bay Intercooler, TiAL 46mm w/gate, TiAL 50mm BOV, Apexi AVC-R EBC, SPEC Stage3+ Clutch kit, Crane CDI Ignition ![]() |
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Join Date: May 2002
Location: Georgia
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Who makes rebuild kits for the factory wastegate? How/where can you get a .5bar spring?
Thanks, Ben
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1986 3.2 Carrera |
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Location: Austin, TX
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Agreed Beepbeep. Too many people think you actually gain power with BOV's.
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A fellow Pelacanite
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1981 UK 930. G50/01 shortened, 964 3.8RS Fibreglass Body Kit, 18" Alloys 8.5" F & 10" R, 225's F & 285's R, Special Colour Metallic Blue Paint, FIA Sparco Evo's, A/C and Air Pump removed, Electronic Boost Controller, GHL Headers, Tial46 WG. Fitting - New service kit. Needs Fitting - Innovate XD-16 Kit, Kokeln IC. Stephen's K27 HFS, EVO Intake Assy & his Modded USA Fuel Head. 1983 UK 911 3.2 Carrera Sport Coupe. Black, Black Leather with Red Piping, Black Alloy Gear Knob, K&N Air Filter Element, Turbo Tie rods. Needs Fitting - K&N CO Sensor, Round A/F Dial Gauge, Factory Short Shift Kit. http://www.danasoft.com/sig/Iamnotanumber.jpg |
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