boost gauge take off

[Baxter]

iv read some where that i CAN NOT take off from the turbo to feed the gauge as it will read vacuum not boost pressure

i need to fit an adaptor into the main 3" inlet hose from the intercooler to the inlet

is that right?

http://www.demon-tweeks.co.uk/products/ProductDetail.asp?cls=MSPORT&pcode=GLOSST01

 

[Terranosaurus]

Take off needs to be as close to the inlet as possible to be accurate otherwise it will not read boost at the engine. IE pressure up stream of the intercooler will be greater than that at the inlet due to drag through the turbo. The only wy you could "read vacuum" would be to have the take off on the wrong side of the turbo.

 

[Deleted Member S]

Take off needs to be as close to the inlet as possible to be accurate otherwise it will not read boost at the engine. IE pressure up stream of the intercooler will be greater than that at the inlet due to drag through the turbo. The only wy you could "read vacuum" would be to have the take off on the wrong side of the turbo.

HB on my TDI i'm I right in thinking the best place to fit a fitting like Baxter has mentioned would be in the short hose between the intercooler & inlet manifold :? I've often fancied fitting a boost gauge to keep an eye on what the turbo is up too & if nothing else it would keep the kids amused :lol: :lol: :lol:

 

[Toolbox]

Why not Tee in to the small pipe that opens the waist gate valve on the Turbo

 

[Deleted Member S]

Why not Tee in to the small pipe that opens the waist gate valve on the Turbo

That was my 1st thought :smile: but after reading what HB had said it made me wonder if there would be a better way

 

[Toolbox]

Why not Tee in to the small pipe that opens the waist gate valve on the Turbo

That was my 1st thought :smile: but after reading what HB had said it made me wonder if there would be a better way

I often test from that point if there is no pipe to an injection pump diaphragm available and cant see why the pressure would be any different across the inlet system.

You can infact have a vacuum all be it small in the inlet after turbo stall, when changing gear etc. After a sudden deceleration the boost pressure has no where to go and goes back through the turbo stalling it, there are various dump valves available on the aftermarket, that dump the turbo pressure on gear changing preventing stalling, the theory being it will keep spinning and give a faster acceleration. Something more to pimp your ride sweety maybe. :wink: :wink:

 

[Deleted Member S]

You can infact have a vacuum all be it small in the inlet after turbo stall, when changing gear etc. After a sudden deceleration the boost pressure has no where to go and goes back through the turbo stalling it, there are various dump valves available on the aftermarket, that dump the turbo pressure on gear changing preventing stalling, the theory being it will keep spinning and give a faster acceleration. Something more to pimp your ride sweety maybe. :wink: :wink:

I remember something about there can be a vacuum & it can stall the turbo between gear changes :roll: My m8 fitted a dump valve to his 200sx(S14) & it did make a differance & the sound from the dump valve was lovely & as for pimping my motor I may in time fit a dump valve & change my name to PIMP -rotfl- -rotfl- -rotfl-