Hard on for turbochargers? - Page 4

liferunner2 · 02-02-2008, 07:20 AM

Quote:

Originally Posted by tc

Correct.

Maybe a better way to explain it is, that the boost (pressure over ambient) is the same, but the absolute intake manifold pressure is lower because the ambient pressure is lower at altitude.

The % O2 is the same at altitude, just the pressure/quantity of air is less.

TC, the %O2 in the air at altitude is actually less than that at sea level because O2 is a heavier molecule than some of the other constituents of air and actually "settles" into lower lying areas. This coupled with the fact that there is less air overall is one reason why climbers need to carry 02 tanks at extreme altitudes, and why many high altitude mountain lakes have lower levels of O2 in them than their counterparts at sea level.

Chris

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Greedy · 02-02-2008, 04:07 PM

Quote:

Originally Posted by j-man

greedy - what are those vacuum taps for above the port fueler?

Mapecu2, AIC x6, boost controller, wastegate, boost gauge, FPR, IAC....I think that's all.....

rentedmule · 02-03-2008, 06:50 PM

very nice looking set-up greedy. I'm hoping my next rig will be a S/C'd 3.4 taco, I tried but I couldn't afford one before I got my sonoma. here's a pic of my setup - sorry for the blasphemous chevy content! There's also a progressive meth-injection system on it now

j-man · 02-03-2008, 08:36 PM

Quote:

Originally Posted by Greedy

Mapecu2, AIC x6, boost controller, wastegate, boost gauge, FPR, IAC....I think that's all.....

ahh, forgot about that - cool. Real clean looking. Thx.

tc · 02-04-2008, 08:05 AM

Quote:

Originally Posted by rentedmule

There's also a progressive meth-injection system on it now

Your truck is on meth?

rentedmule · 02-04-2008, 08:38 AM

lol, it takes drugs to make a chevy fast!

www.snowperformance.net

Asha'man · 02-04-2008, 06:24 PM

Snow makes some damned good power with their methanol systems. My buddy used to do powdercoating for Matt Snow before the meth stuff took off. It cools an intake charge drastically, allowing higher boost and more aggressive timing without having to run race gas.

rentedmule · 02-05-2008, 08:49 AM

yeah, it's cool stuff, lots of benefits with very few risks. I haven't finished the tune on my truck yet so I'm not sure how much HP it added. On the topic of turbos, I just added another toy to the stable last night, check the sig!

tc · 02-05-2008, 11:52 AM

Quote:

Originally Posted by liferunner2

TC, the %O2 in the air at altitude is actually less than that at sea level because O2 is a heavier molecule than some of the other constituents of air and actually "settles" into lower lying areas. This coupled with the fact that there is less air overall is one reason why climbers need to carry 02 tanks at extreme altitudes, and why many high altitude mountain lakes have lower levels of O2 in them than their counterparts at sea level.

Chris

So then how does the SR71 burn fuel at 80,000 ft?

I happen to have a copy of the Pratt & Whitney Aeronautical Vestpocket Handbook, and while it carefully details the atmospheric pressure, viscosity, and temperature at altitudes from 0 to 75000 ft, it doesn't include %O2. None of the equations for engine thrust include a factor of %O2.

Mountain climbers carry oxygen because there's just flat out less air, which means less pressure pushing the air into your lungs AND less oxygen (by quantity). The % O2 is the same (or close enough that its not worth considering)

Asha'man · 02-05-2008, 04:50 PM

Quote:

Originally Posted by rentedmule

yeah, it's cool stuff, lots of benefits with very few risks. I haven't finished the tune on my truck yet so I'm not sure how much HP it added. On the topic of turbos, I just added another toy to the stable last night, check the sig!

Post pics of the TTA!

rentedmule · 02-06-2008, 08:57 AM

Quote:

Originally Posted by tc

Mountain climbers carry oxygen because there's just flat out less air, which means less pressure pushing the air into your lungs AND less oxygen (by quantity). The % O2 is the same (or close enough that its not worth considering)

when I said less O2 in my post a while back I did word it poorly - I meant because of the overall decrease in the density of the air - I hadn't really thought about it being a heavier molecule so I have no idea how that plays in.

as for the TTA - she's a beaut!!!

surf4runner · 02-06-2008, 01:33 PM

Quote:

Originally Posted by CoedNaked

why everyone seems to have a big hard on for turbo chargers over superchargers?

because injection is nice, but id rather be blown

j-man · 02-06-2008, 07:33 PM

Quote:

Originally Posted by surf4runner

because injection is nice, but id rather be blown

perfect!

02-03-2008, 06:50 PM	#78 (permalink)
rentedmule Registered User Join Date: Dec 2005 Location: Edmonton AB Posts: 330	very nice looking set-up greedy. I'm hoping my next rig will be a S/C'd 3.4 taco, I tried but I couldn't afford one before I got my sonoma. here's a pic of my setup - sorry for the blasphemous chevy content! There's also a progressive meth-injection system on it now __________________ '93 4runner, 3.0, 31x10.5's, OME900's. '84 Xtracab, 22R, flareside, 6" lift, 33x12.5's '03 Sonoma 2wd, supercharged 4.3L@9psi '81 Turbo Trans Am, WS6, 301V8@9psi

02-04-2008, 08:38 AM	#81 (permalink)
rentedmule Registered User Join Date: Dec 2005 Location: Edmonton AB Posts: 330	lol, it takes drugs to make a chevy fast! www.snowperformance.net __________________ '93 4runner, 3.0, 31x10.5's, OME900's. '84 Xtracab, 22R, flareside, 6" lift, 33x12.5's '03 Sonoma 2wd, supercharged 4.3L@9psi '81 Turbo Trans Am, WS6, 301V8@9psi

02-04-2008, 06:24 PM	#82 (permalink)
Asha'man Registered User Join Date: Jan 2006 Location: Centennial, CO Posts: 870	Snow makes some damned good power with their methanol systems. My buddy used to do powdercoating for Matt Snow before the meth stuff took off. It cools an intake charge drastically, allowing higher boost and more aggressive timing without having to run race gas. __________________ --Brian Truck - 1986 4Runner SR5 - 22RE, 5spd, 265K, 3" OME/BJ spacer lift, 31x10.50 TrXus MT's, satin black AR steelies, homemade bikini top Car - 1995 Lexus SC400, red/black, 220K, coilovers, exhaust Pickup - 1985 Toyota Xtra cab pickup - 2wd, 22R, 5spd, 270K miles, 4Runner buckets, currently two colors

02-05-2008, 08:49 AM	#83 (permalink)
rentedmule Registered User Join Date: Dec 2005 Location: Edmonton AB Posts: 330	yeah, it's cool stuff, lots of benefits with very few risks. I haven't finished the tune on my truck yet so I'm not sure how much HP it added. On the topic of turbos, I just added another toy to the stable last night, check the sig! __________________ '93 4runner, 3.0, 31x10.5's, OME900's. '84 Xtracab, 22R, flareside, 6" lift, 33x12.5's '03 Sonoma 2wd, supercharged 4.3L@9psi '81 Turbo Trans Am, WS6, 301V8@9psi

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