Can hot weather have a influence on boost pressure? Today i notice that i had to floor the truck up to 2800+ RPM before it reaches 10psi and even only to 9. I've tighted all hoose, thinking i could have a leak so i'll see tomorrow. But it is not reaching 10psi at 2100 like it use to.
Boost vs Ambient temp
- Thread starter eleblanc
- Start date
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Yes it can. out at the Wet coast a rainy day at 10c boost is adequate. a hot dry day say 25c and very little hummidity there can be anywhere from .5lb to 2lb loss
Are you guys sure it is only the heat and not ambient pressure also ? I have aviational EGT and Boost gauges.The boost gauge measures absolute pressure and when altitude goes up or down the boost numbers drop or rise but the amount of boost produced stays the same. Performance varies also..
crushers
post ho
hummm, a turbo is a mech device used to create boosted charge of air...
so enlighten me on how abiant air temp can have influence on the boost being created.
so enlighten me on how abiant air temp can have influence on the boost being created.
Check your waste gate - it might be sticking? Mine got a little sticky over the winter (carboned up) so I just cleaned it up yesterday.
Oh - and make sure that the boost guage is connected properly - I had a leak in the boost line and was throwing the reading off.
I'll have the new bed on my truck tomorrow, 3 inch mandrel exhaust with aeroturbine muffler, and going to order some TSL q78's - so I should be ready for a trip to Weir in a couple of weeks. Did you go for a scouting run on the weekend?
Louis
Oh - and make sure that the boost guage is connected properly - I had a leak in the boost line and was throwing the reading off.
I'll have the new bed on my truck tomorrow, 3 inch mandrel exhaust with aeroturbine muffler, and going to order some TSL q78's - so I should be ready for a trip to Weir in a couple of weeks. Did you go for a scouting run on the weekend?
Louis
- Thread starter
- #6
Tapage
Club 4X4 Panamá
That we have down here, it's at cold mornings/nights or rainy day you have for sure more O available in the ambient .. it means you have more performance compared to a heavy sun summer day at midday ..
I could't have said it better! I am no scientist but this is what I have found on cummins 6bta,hino 13bt cummins ISX, caterpillarC15 accert engines. On the West coast where there is lots of moisture the cooler days the air is denser much better for charge air
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Geeze it sure was quiet without you around Wayne , welcome back
x2 welcome back!
moister in the air, i guess is a little like water injection
not sure thoe 
crushers
post ho
hummm, i thought the question was ambient air temp not air density... or did i miss something in the translation??
crushers
post ho
LOL!!
i heard that it was pretty one sided and not much discussion going on...i will see what i can do about that...
i heard that it was pretty one sided and not much discussion going on...i will see what i can do about that...
- Thread starter
- #13
Ambient air i meant.
I would think that increased ambient air temperature would also mean significant decrease in ambient air pressure? I mean hot air expands right? Kind of like the opposite effect of an intercooler?
I'm just guessing here.
OT: BTW Wayne I called you like a year ago asking advice on importing. Went the other route but thanks again anyway!
Tapage
Club 4X4 Panamá
The deal here ( little out of the question ) it's more Oxigen = more powa. In the same line, the I/C cool down your air that go directo to your intake .. means, more fresh aire for your combusion with more Oxigen but the deal of the IC really are the temp on the chamber ..
So more cool air in your chamber, less EGT, you can compress more air and get more O
Clear as mud ..
So more cool air in your chamber, less EGT, you can compress more air and get more O
Clear as mud ..
crushers
post ho
well, i can produce 14 lbs of boost with the same settings at both -30 and +30 and the power "feels" the same...
air density (moisture content) can change the performance "feel"
air density (moisture content) can change the performance "feel"
15 psi at +20 will feel less than 15psi at -20.....warm air is less dense than cold air , same goes for wet air...less molecules. Even though you produce the same boost the hotter air starting out will have " less " air molecules per intake slug. Higher OAT will also drive up your EGT's.
Same goes for density altitude...the higher you are above sea level (less O2) the less power you make. You will probably not notice the less power untill you get up in altitude because turbos due just that...they try to keep sea level density on a standard temperature day(15 degrees cel.) Increased temps reduce power while cooler temps will improve it, along with other engine perameters.
Moisture content and temp does have an effect on hp output.
Daryl
Same goes for density altitude...the higher you are above sea level (less O2) the less power you make. You will probably not notice the less power untill you get up in altitude because turbos due just that...they try to keep sea level density on a standard temperature day(15 degrees cel.) Increased temps reduce power while cooler temps will improve it, along with other engine perameters.
Moisture content and temp does have an effect on hp output.
Daryl
- Thread starter
- #18
Anyhow, today i've increase the fuel for the first time since i installed the turbo in october. Crap that thing still had alot to offer, it pulls even more then before and now it reach 10 psi pretty quick. Being straight pipe now it really screams...gotta love diesel and turbos. 
Tapage
Club 4X4 Panamá
Anyhow, today i've increase the fuel for the first time since i installed the turbo in october. Crap that thing still had alot to offer, it pulls even more then before and now it reach 10 psi pretty quick. Being straight pipe now it really screams...gotta love diesel and turbos.
Welcome to the Club dude .. !!
