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-   -   Boost Gauge (http://www.irv2.com/forums/f115/boost-gauge-27212.html)

Toby 05-18-2007 05:42 PM

Still getting use to our new AMB. The book said the boost gauge reflects pressure produced by the turbo. On my old 72 Chevy pick-up I added a vacuum gauge to "get better gas milage" by watching the gauge, knowing the more vacuum the more gas it was eating. The boost gauge acts similarily to the old vacuum gauge, but not the same, so what am I supposed to be looking for on the boost gauge? Can't seem to figure out what its supposed to reflect. Any ideas? s/Toby

Toby 05-18-2007 05:42 PM

Still getting use to our new AMB. The book said the boost gauge reflects pressure produced by the turbo. On my old 72 Chevy pick-up I added a vacuum gauge to "get better gas milage" by watching the gauge, knowing the more vacuum the more gas it was eating. The boost gauge acts similarily to the old vacuum gauge, but not the same, so what am I supposed to be looking for on the boost gauge? Can't seem to figure out what its supposed to reflect. Any ideas? s/Toby

RustyJC 05-18-2007 06:13 PM

Just like the vacuum gauge on the gasser, the lower you can keep the boost gauge, the less fuel you're consuming.

The boost gauge is also useful in troubleshooting many problems that might arise on a diesel engine. For instance, excessive smoke or EGTs could be caused by a leak in the charge air piping system, and the boost gauge would indicate this with lower-than-normal readings.

Rusty

Toby 05-20-2007 11:56 AM

Thanks for the info. I had a feeling it was tied to the vacuum somehow. Although its not the same needle movement as my old vac gauge.

BTW, I visited your site for the Texas Boomers, Wish we were closer to Tejas so we could visit with your group. Nice site. We have a son who recently moved to San Antonio. If we make it out there again, I'll check your site and maybe we could visit. s/Toby

RustyJC 05-20-2007 03:24 PM

Yep, since a diesel doesn't have a throttle plate in the intake like a gas engine, it doesn't produce manifold vacuum. This (reduced pumping losses) is one of a number of reasons (some others being higher expansion ratio, higher BTU content per gallon of fuel) for the improved efficiency of a diesel over a gasoline (Otto cycle) engine.

If you're ever in the neighborhood, please feel free to join us if there's a Texas Boomers rally or regional get-together going on. We'd love to meet you and get to know you.

Rusty

Toby 05-20-2007 07:26 PM

Rusty

Appreciate the offer. Tell those TT ladies to keep the pink birds flying and maybe one day we can enjoy your groups company. s/Toby


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