Screen Removal Bargman L-300 Door Handle brakes Satellite Fuel Tank Fire Extinguishers Roof Antenna Tech Talk Forum Shortcut Motor Oil Window Generators headlights batteries Radiator AC Unit Grab Handle Wiper Blades Wiper Blades Door Locks Door Locks Door Locks Door Locks Rims Front Shocks Rear Shocks Front Tires Oil Filter Steps Roof Vent Awning Propane Tank Mirror Info Clearance Lights Clearance Lights Clearance Lights Clearance Lights Clearance Lights Spartan Chassis Gillig Chassis Freightliner Chassis P-32 Chassis MCC Chassis
    Forums    Tech Talk    New boost gauge
Go to...
Start A New Topic
Search
Notify
Tools
Reply To This Topic
  
New boost gauge
 Login now/Join our community
 
Picture of Fred & Cindy
posted
I just returned from my mechanic where he installed a boost gauge for my 8.3 Cummings, 240 horsepower. Never had one before. Anyway, the max boost PSI coming home was 23-24 in 3rd gear going uphill. It mostly hovered around 10 on straight road. Are these normal readings for my motor?


1990 32' Regency, Wide Body
Spartan Chassis, 8.3 CTA Cummins
4 Speed Allison Trans
South Central Missouri
 
Posts: 378 | Location: Missouri | Member Since: 06-24-2012Reply With QuoteReport This Post
Supporting Member of Barthmobile.com 7/17
Picture of Steve VW
posted Hide Post
I am interested in the feedback also. My 8.3 has no EGT or boost gauge. These are high on my list to get in place to be able to monitor engine loading.

Max boost pressure is normally about 26-28 psi, limited by the waste gaste. At partial throttle, the boost will be lower. The part throttle boost at various rpms would be good to know indeed.

When I get gauges I will report on the results.


8607-3346-33TFPOB------9708-M0037-37MM-01
86 Regal SE 33 Tag axle--"98" Monarch 37
Chev P3(7) 454TBI--------Cummins 8.3 300 hp
400 hp fuel injected-------6 spd Allison, Spartan MM
 
Posts: 3216 | Location: Kalkaska, MI | Member Since: 02-04-2011Reply With QuoteReport This Post
Supporting Member of Barthmobile.com 7/17
Picture of Steve VW
posted Hide Post
Found this one from Billy T's coach:



8607-3346-33TFPOB------9708-M0037-37MM-01
86 Regal SE 33 Tag axle--"98" Monarch 37
Chev P3(7) 454TBI--------Cummins 8.3 300 hp
400 hp fuel injected-------6 spd Allison, Spartan MM
 
Posts: 3216 | Location: Kalkaska, MI | Member Since: 02-04-2011Reply With QuoteReport This Post
Supporting Member of Barthmobile.com 4/08
posted Hide Post
Cummins ISB 5.9L
Max boost about 22psi although when I had full HP saw 30psi
Normal about 10psi at cruise
EGT runs 900 to 1000 and straight and level and up to 1300 on a hard pull.

Our waste gate is set to open at 30psi


'92 Barth Breakaway - 30'
5.9 Cummins (6B) 300+ HP
2000 Allison
Front entrance
 
Posts: 923 | Location: Minneapolis/Yuma | Member Since: 08-17-2006Reply With QuoteReport This Post
Supporting Member of Barthmobile.com 10/08
Picture of MWrench
posted Hide Post
quote:
Originally posted by Gary Carter:
Cummins ISB 5.9L
Max boost about 22psi

Our waste gate is set to open at 30psi


Ummm not on a stock 5.9L 190-230 HP Cummins. Maybe on yours with the changes you made BUT a stock waste will open 20-22 PSI.


Ed
94 30' Breakaway #3864
30-BS-6B side entry
230 Cummins, Allison 6 speed
Spartan chassis
K9DVC
 
Posts: 1893 | Location: Los Gatos, CA | Member Since: 12-08-2005Reply With QuoteReport This Post
  Powered by Social Strata  
 

    Forums    Tech Talk    New boost gauge

This website is dedicated to the Barth Custom Coach, their owners and those who admire this American made, quality crafted, motor coach.
We are committed to the history, preservation and restoration of the Barth Custom Coach.