Do you use a boost guage

I'm old school and like to have both gauges. When they first came out without a pyrometer I know several people that asked their dealer about it and was told the ECM would take care of it. I still want a boost gauge in the dash, just another tool to help diagnose a problem sometimes.

 

I occasionally break 10-MPG with 53' dry boxes at 40,000 in the box (8.7 - 9 mpg is avg.). I consider myself exxxxtremely good at saving fuel,...I tried driving without a boost gauge for a week,...I lost almost 1 mpg. Darn straight, I fixed that gauge.

I hate boost/pyro gauges that read their data from the ECM. Their output is a quantified result of what the ECM 'Thinks' it actually is, and Boost itself (Charge Pressure) is what is used in primary fuel/air calculations to determine combustion efficiency. Any error, no matter how small, directly effects fuel mileage and/or power, resulting in losses. Nothing comes close to having an actual 'Mechanical Gauge' to drive by, and to compare readings from, when checking for fuel mileage losses. In my opinion, that alone renders ECM-read gauges for boost/pyro useless. Especially products like the scangauge. I have also seen dash charge pressure gauges that are ECM-fed off by more than 10-lbs before.

Just my opinion on it,...Rawze

 

Yes both, and make sure they are "mechanical" gauges, not reading from the ECM

 

What are you looking for on the boost gauge to get max MPG? I didn't have one on the company truck i drove and now have one on my truck but never knew what i was really looking for.

 

Less boost=less fuel=more MPG's, try to maintain speed with as little boost as possible. Rawze is the king on MPG's on a Cummins you need to read ALL this...
http://www.thetruckersreport.com/tr...3-cummins-isx-cm871-technical-discussion.html
The education you'll get there is invaluable. Go back and reread it every couple of days he updates it regularly.

 

I have a detroit...I assume its the same idea with boost? I'll read the link when i get a chance....just finished getting unloaded.

 

A boost and pyro are very useful tools for MPG's. Make sure they are mechanincal as mentioned above. I was really waiting for someone to start blabbing about how there is no such thing as a 2012 C15 haha...

 

Yes, same principles but parts will be in a different place and a different color but do the same job. But they need maintenance. There is a guy on here goes by j-dawg is excellent on Detroit's, so is rebel127 but the last time I talked to him(rebel127) he didn't do anything newer than 2007.