diverter valve
05-03-2006 | 07:43 PM
#16
Race Car
Joined: Sep 2005
Posts: 3,508
Likes: 0
From: England UK
Originally Posted by 911addict
You've persuaded me. I'm going to order one.
Also looked at the website for Tial, and am wandering about the Tial blow-off valve. I apologise in advance for being thick (I'm not technical) but I presume this is different to the above Diverter valve. If so, should one look to replace with the Tial for the same reason ie improvement on the original equipment?
Also looked at the website for Tial, and am wandering about the Tial blow-off valve. I apologise in advance for being thick (I'm not technical) but I presume this is different to the above Diverter valve. If so, should one look to replace with the Tial for the same reason ie improvement on the original equipment?
It's not necesarry with the stock turbo & stock style heat exchangers.
You don't need it and will get no benefit.
-
Yes the BOV & the Wastegate are too entirely different things.
The wastegate is on the exhaust & the BOV is on the intake assy.
Last edited by nathanUK '81 930 G50; 05-05-2006 at 03:31 PM.
05-03-2006 | 07:46 PM
#17
Race Car
Joined: Sep 2005
Posts: 3,508
Likes: 0
From: England UK
Originally Posted by 911addict
Sonny re. your comment on BOV, are you talking about the Tial
http://www.tialsport.com/prod_bv.htm
or the Evo?
http://www.evoms.com/p%20996tt%20diverter%20valves.htm
http://www.tialsport.com/prod_bv.htm
or the Evo?
http://www.evoms.com/p%20996tt%20diverter%20valves.htm
05-04-2006 | 05:06 PM
#18
Instructor
Joined: Jul 2004
Posts: 215
Likes: 0
From: Bournemouth, South coast, England
I brought my tial wastegate and BOV from "Jon Mitchell Porsche"... Also known as "9XX Porsche" in my town, Bournemouth UK.
Both items are sold specifically for the 964 turbo and were quite reasonably priced and came with technical support backup direct from Jon Mitchell, who is pretty well known as a Porsche tuning guru as well as being the owner of the local Porsche specialist garage in this part of the world.
Both parts fitted just as explained (direct plug and play fit)... I just need to sort out my fueling and I will be able to report back on the performance.
I just hope the performance gains of running 1 bar of boost and the dump valve will put as much of a smile on my face as when I brought a similar kit from 9XX for my 944 turbo last year
Both items are sold specifically for the 964 turbo and were quite reasonably priced and came with technical support backup direct from Jon Mitchell, who is pretty well known as a Porsche tuning guru as well as being the owner of the local Porsche specialist garage in this part of the world.
Both parts fitted just as explained (direct plug and play fit)... I just need to sort out my fueling and I will be able to report back on the performance.
I just hope the performance gains of running 1 bar of boost and the dump valve will put as much of a smile on my face as when I brought a similar kit from 9XX for my 944 turbo last year
05-04-2006 | 05:10 PM
#19
Instructor
Joined: Jul 2004
Posts: 215
Likes: 0
From: Bournemouth, South coast, England
Both the standard Bosch/Porsche BOV on my 944 turbo last year, and my 964 turbo this year had failed.. both causing a vacuum leak.
On the 944 turbo I tried a Bailey and then a forge dump valve before I settled on one from 9XX.. I found that the bailey had issues which caused vacuum leaks after 10,000 miles. The Forge one occasionally stuck open which caused a loss of boost which took ages to work out.
Don't you just love faults that are only ever there at 100mph+ when on boost. Its not easy to work out once the car is back in the driveway and you have the tools out!
On the 944 turbo I tried a Bailey and then a forge dump valve before I settled on one from 9XX.. I found that the bailey had issues which caused vacuum leaks after 10,000 miles. The Forge one occasionally stuck open which caused a loss of boost which took ages to work out.
Don't you just love faults that are only ever there at 100mph+ when on boost. Its not easy to work out once the car is back in the driveway and you have the tools out!
05-05-2006 | 05:25 AM
#20
Three Wheelin'
Joined: Apr 2006
Posts: 1,977
Likes: 0
From: London, England
Nathan,
You said "It's not necesarry with the stock turbo & stock style heat exchangers.
You don't need it and will get no benefit."
Reading the posts from Sonny and Rennbod, they seem to be using standard setup (except 1 bar) and are getting/ expecting real gains.... Is it or isn't it worthwhile?
You said "It's not necesarry with the stock turbo & stock style heat exchangers.
You don't need it and will get no benefit."
Reading the posts from Sonny and Rennbod, they seem to be using standard setup (except 1 bar) and are getting/ expecting real gains.... Is it or isn't it worthwhile?
05-05-2006 | 01:47 PM
#21
Addict
Rennlist
Lifetime Member
Rennlist
Lifetime Member
Joined: May 2001
Posts: 1,294
Likes: 3
From: Santa Ana, CA
Originally Posted by 911addict
Nathan,
You said "It's not necesarry with the stock turbo & stock style heat exchangers.
You don't need it and will get no benefit."
Reading the posts from Sonny and Rennbod, they seem to be using standard setup (except 1 bar) and are getting/ expecting real gains.... Is it or isn't it worthwhile?
You said "It's not necesarry with the stock turbo & stock style heat exchangers.
You don't need it and will get no benefit."
Reading the posts from Sonny and Rennbod, they seem to be using standard setup (except 1 bar) and are getting/ expecting real gains.... Is it or isn't it worthwhile?
The BOV will be beneficial to all Turbo cars, including my stock one.
Sonny
05-05-2006 | 02:08 PM
#22
Instructor
Joined: Jul 2004
Posts: 215
Likes: 0
From: Bournemouth, South coast, England
I do find the uprated BOV helps keep the turbo spooling during gear changes... On other cars I have found the dual port tials have helped the turbo spool up and less wastegate creep or high rpm boost loss.
05-25-2009 | 09:55 PM
#24
Nordschleife Master
Joined: Jan 2009
Posts: 5,610
Likes: 82
From: MA
Which of these bypass valves are you guys using, either OEM or aftermarket replacement?
- Bosch 0 280 142 108
- Bosch 0 280 142 110
- Bosch 0 280 142 114
It is my belief that people just love to spend money on heavy and loud aftermarket trick blow-off / by-pass / diverter valves, the louder the heavier the shinier the better.
As far as substance goes, is there any reason to prefer anything to a new, fully functional Bosch 0 280 142 110?
- Bosch 0 280 142 108
- Bosch 0 280 142 110
- Bosch 0 280 142 114
It is my belief that people just love to spend money on heavy and loud aftermarket trick blow-off / by-pass / diverter valves, the louder the heavier the shinier the better.
As far as substance goes, is there any reason to prefer anything to a new, fully functional Bosch 0 280 142 110?
