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power
Why is it that sometimes it feels like there's tons of power being delivered from my 944, and sometimes it feels more sluggish? As we all know, when the air is cool and dry, the cars pull better... why is this? Just curious.
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Current Stable: Black 07 Porsche 987 Cayman S: Long-Tube Headers; FabSpeed Exhaust; VividRacing ECU Tune; IPD Plenum; 997GT3 Throttle Body. Blue 1983 Porsche 928S. 1985.5 Porsche 944 Rat Rod. 2011 Acura MDX. 2008 Mazda 3. Gone But Not Forgotten:Garnet Red 86 Porsche 951("The Purple Pig"). Alpine White 83 Porsche 944 ("Alpine Wolf"). Guards Red 84 Porsche 944. |
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04-20-2003, 07:04 PM
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you have something going wrong. Mayby your 02 sensor. Cooler air is more dense, so you are, in effect, getting more air into your combustion chamber.
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*Disclaimer: The person above is actually dumber than he appears. my web site Torque values maintainance and repairs lots of my rebuild pics weights and measurements '84 944 auto/ps/ac/cc '86 951 Providing ignorance one post at a time. |
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04-20-2003, 07:58 PM
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Join Date: Mar 2003
Location: dfw, texas
Posts: 1,137
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depends on how much magic is in the air.
higher concentration of magic=more power. porsche recommends at least 41% magic but as we all know, some days thats not possible.
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84 944 Non Alcoholic |
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04-20-2003, 08:06 PM
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Oh man...this is sooo true. I have the same problem. Out here in LA it is usually around 35% magic. At night it usually gets to about 39%. I would like to get a magic injection...but it is hard to come by bottled magic. Every now and then it jumps to about 46%...but i am not tuned for that high..and run alittle rich on magic. In all fairness...the Air is more dense...therefor more O2 in the intake...so the car futs more fuel in there...and more air + more fuel...add a little PFM...and BAM...more power
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If you don't live life on the edge, you take up too much space. |
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04-20-2003, 08:50 PM
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Hey very worn, you in So Cal now??
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*Disclaimer: The person above is actually dumber than he appears. my web site Torque values maintainance and repairs lots of my rebuild pics weights and measurements '84 944 auto/ps/ac/cc '86 951 Providing ignorance one post at a time. |
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04-20-2003, 11:39 PM
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Writer/Teacher
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the power difference is never very huge, but at night vs. during the day, the 944 just seems to have more "go"
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Current Stable: Black 07 Porsche 987 Cayman S: Long-Tube Headers; FabSpeed Exhaust; VividRacing ECU Tune; IPD Plenum; 997GT3 Throttle Body. Blue 1983 Porsche 928S. 1985.5 Porsche 944 Rat Rod. 2011 Acura MDX. 2008 Mazda 3. Gone But Not Forgotten:Garnet Red 86 Porsche 951("The Purple Pig"). Alpine White 83 Porsche 944 ("Alpine Wolf"). Guards Red 84 Porsche 944. |
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04-21-2003, 06:22 AM
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Ornery Bastard
Join Date: Sep 2001
Location: South Sound
Posts: 2,879
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Cool, dry air is more dense than warm, moist air, which means more oxygen per unit volume of air. The extra oxygen alone doesn't help you though, what is helping you get a little more power is that the injection system is sensing the extra oxygen and is injecting more fuel to compensate. More fuel = more power.
Aaron
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--------- Silver 1998 Volvo S70 T5 <- Daily (Anja) Guards Red 1986 951 <- Seattle car (Gretchen) White 1976 914 2.0 F.I. <- Prodigal car, traded away then brought back again (Lorelei) |
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04-21-2003, 10:42 AM
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Join Date: Dec 2001
Location: ventura,ca
Posts: 290
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lights appear to go by faster at night.. thus more power.
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1988 924s mars red coastal cruzer |
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04-21-2003, 05:00 PM
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First off...yes Todwic...I am in So Cal now...Its crazy...If ya see a nice black 951 driving around...its me! If ya ever need any wrench help or someone to cruize with let me know. By the way guys...having the right song playing makes the car even faster!
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If you don't live life on the edge, you take up too much space. |
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04-21-2003, 08:59 PM
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Welcome to so cal, very! a 951, eh? Lemme drive it? I just got through with my rebuild, I'm due for a shakedown cruise. We need to hook someting up.
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*Disclaimer: The person above is actually dumber than he appears. my web site Torque values maintainance and repairs lots of my rebuild pics weights and measurements '84 944 auto/ps/ac/cc '86 951 Providing ignorance one post at a time. |
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04-22-2003, 12:03 AM
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Also higher the % of humidity in the air ingested by the engine, cooler it will burn, yielding less power. If your engine temperature, oxygen, or air intake temperature (in the air flow meter) are malfunctioning, there may be a bigger difference of power made between two different times the car's driven.
Ahmet
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Cheers! |
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04-22-2003, 12:43 AM
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Join Date: Feb 2000
Location: Kingsport, TN
Posts: 2,935
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Depends on how much coffee you've drunk.
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Lawrence 1986 951 2002 SLK32 AMG 1987 328GTS 2011 528i |
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04-22-2003, 03:06 AM
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2007 Porsche Cayman S
The Viridian Falcon
SOLD! -- The Purple Pig
SOLD! -- Mighty Mouse
SOLD!! -- Alpine Wolf
'84 Porsche 944 2.5L
1986 Porsche 944 Turbo *currently becoming 3.0l 8v
1984 Porsche 944 2.5 liter, 8 valve 
