OddUnit

Turbo installs n stuff

Go down

Turbo installs n stuff

Post by dirtytorque on Wed Oct 21, 2009 2:31 pm

This is a place to put all my stupid turbo questions.
Is a BOV the same thing as a wastegate?
Hopefully the questions will get less tupid with time.

grazie.
avatar
dirtytorque
.:Charged:.
.:Charged:.

Number of posts : 1101

View user profile

Back to top Go down

Re: Turbo installs n stuff

Post by mrbeige on Thu Oct 22, 2009 1:53 am

I believe not dude. A wastegate bleeds the exhaust gases to bypass the rubo, when the inlet boost pressure reaches a certain threshold. A BOV releases the pressure in the inlet tract when the throttle closes to stop the trubo stalling, and causeing undue damage.

I think that's right Smile

_________________
Stu
"Take one old performance car, modify it so that it is as good, if not better, than a new performance car"

£300 Corrado 1.8 16v
The good lady wife's Golf VR
avatar
mrbeige
.:Admin:.

Male Number of posts : 1384
Age : 41
Location : Near Ely, Cambs.......but another planet according to my wife....

View user profile http://www.oddunit.com

Back to top Go down

Re: Turbo installs n stuff

Post by dirtytorque on Thu Oct 22, 2009 3:13 am

Ok.
So essential part of any turbo install then?
Do you see the on all turbo cars?
avatar
dirtytorque
.:Charged:.
.:Charged:.

Number of posts : 1101

View user profile

Back to top Go down

Re: Turbo installs n stuff

Post by kevhaywire on Thu Oct 22, 2009 4:53 am

Wastegates control the target boost pressure and BOVs get rid of the boost you don't want.

You won't see a BOV on an OE car, they all use recirc valves.

kevhaywire
.:Stroked:.
.:Stroked:.

Number of posts : 605

View user profile

Back to top Go down

Re: Turbo installs n stuff

Post by dirtytorque on Thu Oct 22, 2009 2:35 pm

ok,well as you can tell your speaking to a turbo noob here.
Is it common for DIY'ers to omit them too?
Do you run one?


I guess what I'm asking is will I need one.

Thnks.
avatar
dirtytorque
.:Charged:.
.:Charged:.

Number of posts : 1101

View user profile

Back to top Go down

Re: Turbo installs n stuff

Post by mrbeige on Thu Oct 22, 2009 2:49 pm

Diverter valve or BOV, tis up to you, but you will need either

_________________
Stu
"Take one old performance car, modify it so that it is as good, if not better, than a new performance car"

£300 Corrado 1.8 16v
The good lady wife's Golf VR
avatar
mrbeige
.:Admin:.

Male Number of posts : 1384
Age : 41
Location : Near Ely, Cambs.......but another planet according to my wife....

View user profile http://www.oddunit.com

Back to top Go down

Re: Turbo installs n stuff

Post by kevhaywire on Fri Oct 23, 2009 1:29 am

Yeah it depends on setup and personal preference Very Happy Some folk love the pshhhhht noise of a BOV and will always go that way, and others prefer the silence of a recirc when changing gear.

The other thing to consider is flow. If you've got a largeish turbo that flows lots, you'll be wanting to get rid of the unwanted boost very quickly, so a big flowing BOV will be required, such as the Tial 50mm, or for recircing, Forge do a big valve and Tial have their new "bong" Very Happy

Yeah, I use a BOV... the Tial 50mm job.

kevhaywire
.:Stroked:.
.:Stroked:.

Number of posts : 605

View user profile

Back to top Go down

Re: Turbo installs n stuff

Post by dirtytorque on Sun Nov 15, 2009 9:06 am

handy taken from clubgti

standard on Audi Quattro/S2/RS2, see part #32:
[You must be registered and logged in to see this image.]
[You must be registered and logged in to see this image.]
avatar
dirtytorque
.:Charged:.
.:Charged:.

Number of posts : 1101

View user profile

Back to top Go down

Re: Turbo installs n stuff

Post by Toad on Sun Nov 15, 2009 2:29 pm

dirtytorque wrote:handy taken from clubgti

standard on Audi Quattro/S2/RS2, see part #32:

That's a coolant connection isn't it?
avatar
Toad
.:Mod:.

Number of posts : 411

View user profile

Back to top Go down

Re: Turbo installs n stuff

Post by dirtytorque on Sun Nov 15, 2009 11:47 pm

yup,for the turbo obviously.
Smile


Don't know what people usually use..
avatar
dirtytorque
.:Charged:.
.:Charged:.

Number of posts : 1101

View user profile

Back to top Go down

Re: Turbo installs n stuff

Post by kevhaywire on Mon Nov 16, 2009 2:42 am

On the VRT you just use the throttle body coolant hoses Very Happy

I have seen a VRT take water from the back of the block using one of those core plugs though. It's a very neat way to do it!

kevhaywire
.:Stroked:.
.:Stroked:.

Number of posts : 605

View user profile

Back to top Go down

Re: Turbo installs n stuff

Post by mrbeige on Wed Nov 18, 2009 5:27 am

I guess that is for the water return, rather than supply?

_________________
Stu
"Take one old performance car, modify it so that it is as good, if not better, than a new performance car"

£300 Corrado 1.8 16v
The good lady wife's Golf VR
avatar
mrbeige
.:Admin:.

Male Number of posts : 1384
Age : 41
Location : Near Ely, Cambs.......but another planet according to my wife....

View user profile http://www.oddunit.com

Back to top Go down

Re: Turbo installs n stuff

Post by James H on Mon Nov 23, 2009 9:01 am

mrbeige wrote:I guess that is for the water return, rather than supply?

Thats coolant feed. Wink
avatar
James H
.:Standard:.
.:Standard:.

Number of posts : 45
Location : Whittlesey, Cambs

View user profile

Back to top Go down

Re: Turbo installs n stuff

Post by JNLRacing on Mon May 17, 2010 2:16 am

That core plug joint is the return on the I5's the feed is taken of the auxilary water rail underneath the intake manifold.

As for the question regarding BOV's or recircs. When a turbo is on boost it is creating positive pressure in the intake tract when you shut the throttle the turbo is still spinning and creating pressure. If the pressure builds up in the pipework then the long and short of it the turbo will at a certain point stall as it can spin the blades against the pressure. This in the long term on small and medium size turbo's causes shaft damage. So this is avoided by using a BOV or recirc to vent of excess pressure to avoid the turbo stalling (also known as surge - commonly recognised by a whoop whoop whoop noise)

JNLRacing
.:Cammed:.
.:Cammed:.

Number of posts : 205

View user profile

Back to top Go down

Re: Turbo installs n stuff

Post by Sponsored content


Sponsored content


Back to top Go down

Back to top

- Similar topics

 
Permissions in this forum:
You cannot reply to topics in this forum