Quick question re: turbo diesel

**tangcla** · 15-04-2007, 10:48 AM

Just wondering, with a turbo diesel, if one wants to hook up a boost gauge, does it still work off vacuum?

i.e. a standard boost gauge should work on a diesel?

**Norbie** · 15-04-2007, 11:09 AM

Yes a standard boost gauge will work on a diesel, although it will never read vacuum because a diesel has no throttle plate.

**love ke70** · 15-04-2007, 01:38 PM

they do however have a vacuum pump...wont read it, but diesels do have vacuum, just not generated by shutting throttle...

**Rcubed** · 15-04-2007, 01:59 PM

Originally Posted by love ke70

they do however have a vacuum pump...wont read it, but diesels do have vacuum, just not generated by shutting throttle...

but irrelevant to the question.

Originally Posted by Norbie

Yes a standard boost gauge will work on a diesel, although it will never read vacuum because a diesel has no throttle plate.

yes you can hook up a boost gauge and it will read less than atmospheric when off boost, just not like a petrol engine, because like Norbie said, they don't have a throttle.
and for the physics of it, in order to get a flow you must have a pressure differnce. you convert the potential energy of pressure into kinetic energy of flow -> so increase flow = decrease pressure [means increase pressure difference]

**love ke70** · 15-04-2007, 02:04 PM

Originally Posted by ta23-mbzq-nnr

but irrelevant to the question.

yes you can hook up a boost gauge and it will read less than atmospheric when off boost, just not like a petrol engine, because like Norbie said, they don't have a throttle.
and for the physics of it, in order to get a flow you must have a pressure differnce. you convert the potential energy of pressure into kinetic energy of flow -> so increase flow = decrease pressure [means increase pressure difference]

and as the question had been answered a little extra info wasnt going to hurt anyone.