| View previous topic :: View next topic |
| Author |
Message |
campbellr
Joined: 25 May 2010
Posts: 6
Location: UK
|
 Posted: Sat Jul 19, 2014 7:56 pm Post subject: Replacement 924 Turbo Series 2 Wastegate |
 |
|
I have a UK spec S2 turbo. The wastegate is is reasonable condition but it has the wrong spring and is dumping a lot of boost. It is looking near to impossible to find out what the correct spring is and even harder to locate one.
Only alternative might be to buy an aftermarket 930 wastegate if I can get one with a 10 psi spring.
Does anyone know where I might be able to buy an aftermarket 930 wastegate or any other solution?
Thanks
Robert |
|
| Back to top |
|
 |
Carrera RSR
Joined: 08 Jan 2010
Posts: 2312
Location: Somerset, UK
|
| Posted: Sat Jul 19, 2014 11:29 pm Post subject: |
|
|
Tial waste gates are often used on modified 930's. But as suggested on 924ownersclub, check your current boost pressure and spend less than £100 on an adjustable boost controller to get more boost if its currently dumping too low. No need for a new spring or indeed a new waste gate
_________________
1980 931 - forged pistons, Piper cam, K27/26 3257 6.10 hybrid turbo, 951 FMIC, custom intake, Mittelmotor dizzy & cam pulley, H&S exhaust, GAZ Gold, Fuch'ed, Quaife
Now www.924board.org/viewtopic.php?t=34690
Then www.924board.org/viewtopic.php?t=31252 |
|
| Back to top |
|
|
WEASEL149
Joined: 19 Aug 2005
Posts: 595
Location: UK, Sheffield
|
| Posted: Sun Jul 20, 2014 4:56 am Post subject: |
|
|
Pointless doing anything else until you've fitted a boost gauge.
Even if you do buy a new wastegate with 10psi spring it won't necessarily give you 10psi - you need a way to check.
Agree with the above advice - don't bother messing with springs, just fit a decent manual boost controller from Ideola or JMG Garage.
You need to know your current boost level.
_________________
1979 UK 932 |
|
| Back to top |
|
|
Rasta Monsta
Joined: 12 Jul 2006
Posts: 11733
Location: PacNW
|
| Posted: Sun Jul 20, 2014 4:16 pm Post subject: |
|
|
Do a WTB on Pelican for a 930 spring...you'll come up with one.
_________________
Toofah King Bad
- WeiBe (1987 924S 2.5t) - 931 S3
|
|
| Back to top |
|
|
9xx
Joined: 18 Jun 2006
Posts: 627
Location: Jarvenpaa, Finland
|
| Posted: Mon Jul 21, 2014 4:29 am Post subject: |
|
|
| WEASEL149 wrote: | | Even if you do buy a new wastegate with 10psi spring it won't necessarily give you 10psi - you need a way to check. |
Amen. I bought a 0.8 bar 930 spring a few years ago. In my car it produced only roughly 0.55 bar. I switched back the original spring and got 0.65 bar again. Then, after installing Carrera GT turbo and IC, the boost gauge showed 0.7 bar. With the original 0.65 bar spring that is.
| WEASEL149 wrote: | | ...just fit a decent manual boost controller from Ideola or JMG Garage. |
I wish these boost controllers would be decent... Well I'm not talking about for example Ideola's MBC's but in general level. I have tried two different ball+spring -type controllers and in the lowest setting they usually give so much boost that the overboost switch kicks in (1.2 bar?) . After modifying the spring on the other one I was able the get lower boost readings. So always be careful if you try these controllers.
_________________
Mikko
All gone: 931 '82 Alpine White, original option "220" G31 with LSD + 3 x 944 |
|
| Back to top |
|
|
Carrera RSR
Joined: 08 Jan 2010
Posts: 2312
Location: Somerset, UK
|
| Posted: Mon Jul 21, 2014 8:03 am Post subject: |
|
|
| 9xx wrote: | | WEASEL149 wrote: | | Even if you do buy a new wastegate with 10psi spring it won't necessarily give you 10psi - you need a way to check. |
Amen. I bought a 0.8 bar 930 spring a few years ago. In my car it produced only roughly 0.55 bar. I switched back the original spring and got 0.65 bar again. Then, after installing Carrera GT turbo and IC, the boost gauge showed 0.7 bar. With the original 0.65 bar spring that is.
| WEASEL149 wrote: | | ...just fit a decent manual boost controller from Ideola or JMG Garage. |
I wish these boost controllers would be decent... Well I'm not talking about for example Ideola's MBC's but in general level. I have tried two different ball+spring -type controllers and in the lowest setting they usually give so much boost that the overboost switch kicks in (1.2 bar?) . After modifying the spring on the other one I was able the get lower boost readings. So always be careful if you try these controllers. |
The problem with most modern boost controllers is the small bore and our old school wastegates need lots of air/boost to operate. I have a similar air regulator from JMG as Ideolas running at least 6mm internal diameter. Works just fine from 0.7bar to 1.2bar. PS I disconnected the overboost switch as it cuts fuel, which is not good.
_________________
1980 931 - forged pistons, Piper cam, K27/26 3257 6.10 hybrid turbo, 951 FMIC, custom intake, Mittelmotor dizzy & cam pulley, H&S exhaust, GAZ Gold, Fuch'ed, Quaife
Now www.924board.org/viewtopic.php?t=34690
Then www.924board.org/viewtopic.php?t=31252 |
|
| Back to top |
|
|
CorsePerVita
Joined: 25 Jul 2008
Posts: 1992
Location: Redmond, Oregon
|
| Posted: Mon Jul 21, 2014 8:47 am Post subject: |
|
|
| Rasta Monsta wrote: | | Do a WTB on Pelican for a 930 spring...you'll come up with one. |
Will those work for a series 1?
_________________
- 1977 Porsche 924 2.0 N/A (Trackday Project)
- 1979 Porsche 924 2.0 N/A (The other daily)
- 1980 Porsche 931 (Daily)
- 1987 Lamborghini Jalpa
- 1999 Ducati 900SS |
|
| Back to top |
|
|
924-76
Joined: 05 Jun 2006
Posts: 1489
Location: Ontario, Canada
|
| Posted: Mon Jul 21, 2014 9:30 am Post subject: |
|
|
| CorsePerVita wrote: | | Rasta Monsta wrote: | | Do a WTB on Pelican for a 930 spring...you'll come up with one. |
Will those work for a series 1? |
As far as I know they are the same.
_________________
1976 924 N/A ROW SOLD
1980 931S
1981 931 Part car RIP |
|
| Back to top |
|
|
griffinbilt
Joined: 23 Nov 2010
Posts: 31
Location: Flora Indiana
|
| Posted: Tue Sep 16, 2014 10:11 am Post subject: |
|
|
| Well guy's I am running a 69.95 waste gate from Taco/Taco for a toyotaSupra 40mm in and exh. had to change flanges both sides but worth it. it pulls a 13-15lbs pull all the time, with a 160 deg thermostat and the underbelly on it with a Naca duct installed on it also to channel air to the Turbo, runs perfect on 89 oct. My ride. Tony Griffin |
|
| Back to top |
|
|
Rasta Monsta
Joined: 12 Jul 2006
Posts: 11733
Location: PacNW
|
| Posted: Tue Sep 16, 2014 3:31 pm Post subject: |
|
|
| griffinbilt wrote: | | it pulls a 13-15lbs pull all the time. . .runs perfect on 89 oct |
ker-BLAM!
_________________
Toofah King Bad
- WeiBe (1987 924S 2.5t) - 931 S3
|
|
| Back to top |
|
|
Kenodog
Joined: 25 Jun 2003
Posts: 2669
Location: Vancouver,B.C.
|
| Posted: Wed Sep 17, 2014 9:14 am Post subject: |
|
|
Turbosmart 2 stage boost controller works like a charm. Easy to set and a blast to flip to high once the ambient temp drops
_________________
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 |
|
| Back to top |
|
|
fiat22turbo
Joined: 18 Jan 2006
Posts: 4040
Location: Portland, OR
|
| Posted: Wed Sep 17, 2014 11:55 am Post subject: |
|
|
Or let the EFI system control the boost 
_________________
Stefan
1979 924 Carrera GTS (clone-ish)
1988 944 Turbo S (Silver Rose) |
|
| Back to top |
|
|
|
FAQ
Search
Memberlist
Usergroups
Register
Profile
Log in to check your private messages
Log in
924 FAQ (Technical)
