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10-05-2019, 06:13 AM
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#1
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Member
Join Date: Oct 2016
Posts: 48
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C7 boost level?
Caterpillar C7 question. What boost psi levels are you guys seeing on your dash readout under full load? I'm seeing 26psi max but hearing higher boosts of 30 to 32psi on FB pages so I'm wondering if I have a leak I'm my boots or intercooler or if I'm at the correct level? Tia
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10-05-2019, 12:06 PM
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#3
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Member
Join Date: Oct 2016
Posts: 48
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Quote:
Originally Posted by JaminSamin
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You the man, thank you that makes me feel better
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10-05-2019, 12:18 PM
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#4
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Senior Member
Join Date: Mar 2018
Posts: 338
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Same here 25-26 max
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10-05-2019, 12:24 PM
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#5
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Member
Join Date: Oct 2016
Posts: 48
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Quote:
Originally Posted by the sights
Same here 25-26 max
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Excellent, thank you
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10-05-2019, 05:12 PM
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#6
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Senior Member
Join Date: Jul 2007
Posts: 1,173
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You can call CAT with your engine serial number and they can tell you what the boost was when the engine was tested on the dynamometer after it was built. They sent me the test report.
__________________
Pete - Full Timing
2000 Country Coach Magna 40' Indulgence, CAT C10, #5892
2019 Ford Ranger XLT
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10-05-2019, 05:40 PM
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#7
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Senior Member
Join Date: Mar 2017
Posts: 305
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At 26 lbs you are fine as the maximum boost is controlled by the waste gate. Now like I posted on another post my boost kept losing boost over 2 years of running and was down to 18 lbs. The CAC was leaking badly and replaced it and now the boost is back to 26-27 LBS. Being this happened over two years I didn't think I had much power loss. Was I ever wrong as now with full boost it's performs a whole lot better and really responsive.
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10-05-2019, 06:30 PM
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#8
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Senior Member
Join Date: Dec 2009
Location: Out there, somewhere
Posts: 9,941
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Quote:
Originally Posted by mxtnt
Caterpillar C7 question. What boost psi levels are you guys seeing on your dash readout under full load? I'm seeing 26psi max but hearing higher boosts of 30 to 32psi on FB pages so I'm wondering if I have a leak I'm my boots or intercooler or if I'm at the correct level? Tia
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May I ask, what are "FB" pages? We too only see 26/26.5/27 at full throttle. And, 27 is REALY rare. If you had any form of a leak, you wouldn't even come close to the 26 you see.
Scott
__________________
2004 ITASCA HORIZON 36GD, 2011 GMC Sierra 1500 4x4 Toad '20 Honda NC750X DCT
 2018 Goldwing Tour DCT Airbag
Retired-29.5 yrs, SDFD, Ham - KI6OND
Me, Karla and the Heidi character, (mini Schnauzer)!
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10-05-2019, 08:28 PM
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#9
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Member
Join Date: Oct 2016
Posts: 48
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Quote:
Originally Posted by FIRE UP
May I ask, what are "FB" pages? We too only see 26/26.5/27 at full throttle. And, 27 is REALY rare. If you had any form of a leak, you wouldn't even come close to the 26 you see.
Scott
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I looked back over what I had read for boost and I misread what motor the poster had. He had a c13 and was seeing 32lbs of boost. Guess I was to focused on Cat and boost. Sorry guys but thank you for posting your boost pressures.
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