Boost Gauge Installed - Photos and Question

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Tuskenraider said:
Taking a reading from the turbo will show you how much its putting out and taking it from the manifold will show you whats going into the engine. Both have the pros and cons.

Measure at the turbo and you wont know if you have a leak and only half of the pressure is getting to the manifold. Measure at the manifold and you might see a nice 14psi but you could have a leak and the turbo is working its tits off to try and maintain it.

A bigger intercooler can see a boost increase of 2-3psi although thats me coming from a petrol tuning background and not a diesel one :)
Click to expand...
if you have a split pipe there wont be any boost showing at turbo either ,bigger inter cooler doesnt increase boost it cools the air
 
On a related note. Does anyone know the air volume (in CFM) required by the 200TDI.
My Disco was a conversion, and still utilizes the V8 air box and lots of inefficient hoses/piping installed. I plan to mount a snorkel, and want to rip out the OEM V8 airbox and install an inline air filter and free up a lot of room and un-needed ducting.
I did some calculations from information i found online, and it seem like i won't need anymore than 370 CFM going through the filter. I will definitely over-size and get a filter/air box that can pass at least 500-600 CFM.
 
It looks very close to the exhaust manifold in the photo, but it is at least 6 inches away. There is still a chance it will melt or soften, but it is the least intrusive route for the hose... if it melts, i'll just install a new one and relocate. Cheap and easy.
 
Boultman said:
It looks very close to the exhaust manifold in the photo, but it is at least 6 inches away. There is still a chance it will melt or soften, but it is the least intrusive route for the hose... if it melts, i'll just install a new one and relocate. Cheap and easy.
Click to expand...

or go copper brake line from fitting to the bulk head, then plastic to your gauge. Brass compression fitting will due the connection
 
Boultman said:
On a related note. Does anyone know the air volume (in CFM) required by the 200TDI.
My Disco was a conversion, and still utilizes the V8 air box and lots of inefficient hoses/piping installed. I plan to mount a snorkel, and want to rip out the OEM V8 airbox and install an inline air filter and free up a lot of room and un-needed ducting.
I did some calculations from information i found online, and it seem like i won't need anymore than 370 CFM going through the filter. I will definitely over-size and get a filter/air box that can pass at least 500-600 CFM.
Click to expand...

Just remember what you increase what's going in , there is no point if you can't let it out fast enough;)
 
There is a very non-restrictive exhaust system installed on the Disco. the PO installed it. It's turbo-back, with no cats and a free-flow muffler. Sounds great, but still subtle. Again, we can do whatever we want, emissions-wise, here in Texas if it is a diesel, or over 25 years old.
Does that CFM seem about right for the 200tdi?
 
jamesmartin said:
if you have a split pipe there wont be any boost showing at turbo either ,bigger inter cooler doesnt increase boost it cools the air
Click to expand...


When fitting a bigger FMIC I have always seen an increase in boost pressure but again thats from tuning petrols not diesels but cant see why it would be any different.

And I meant not so much as a massive split but a slight leak causing the turbo to work harder.
 
Tuskenraider said:
Please explain how increasing the fuelling ups the boost pressure?

They are compeltely seperate things :)

IIRC the actuator has an adjustable arm so i would adjust it a turn at a time and see what changes you get, if you up the boost though make sure you adjust the fuelling as more boost on its own wont do much.

Generally you might see a 1psi drop in pressure from the turbo to the manifold depending on the condition of the pipes and the size of the intercooler.
Click to expand...

More fuel, bigger bang, more boost, if you turn the pump down you will get less boost , the wastegate only controls maximum boost not boost lower than max, the fuel burning and exhaust pressure gives the boost:)

Fitted take off for boost gauge today, will post picks up later
 
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