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| The Pub For General Automotive Related Talk |
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29-01-2008, 06:20 PM
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#31 | |||
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Rob
Join Date: Sep 2006
Location: Woodcroft S.A.
Posts: 21,699
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Quote:
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29-01-2008, 06:50 PM
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#32 | ||
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XP Coupe
Join Date: Jan 2005
Posts: 2,098
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Tractive effort converted to power or torque measurements are generally fairly favourable to an enthusiastic client.
There are enough Ford guys who have had their cars dynoed as stock to confirm the figures I quoted. These are the guys who really want to know the effects of mods so get a baseline first. I thought the BMW 740I 2001 was 240kW out of the box? The Audi is dropping 60kW according to the RRI graph Does the Falcon use the BMW differential? AFAIK BA XR6T 240 BkW; 180 RWkW BA XR8 260 BkW ; 190 RWkW Last edited by Wally; 29-01-2008 at 07:01 PM. |
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29-01-2008, 07:52 PM
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#33 | ||
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Regular Member
Join Date: Mar 2007
Location: Mandurah W.A.
Posts: 305
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What about the 6 man dose anyone know how much power they chew up?
__________________
Drive it like you stole it.  FPVTICKFORDCLUBWA New FG XR6T ZF |
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29-01-2008, 08:08 PM
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#34 | ||
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regular user (not drugs)
Join Date: Aug 2007
Location: Disappeared in a cloud of smoke
Posts: 134
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You cant work off a percentage as 20% of 300 kw is 60 kw but if you have 400 kw, 20% of that is 80 kw it wont change when you add more power.
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BLOWN BY BLUE POWER TUNED BY CPV TUNING MACKAY STOCK INTERNALS,DIFF,BOX BEST 60 FT = 1.57 PB 11.10 @ 124 MPH BA XR8 MKII 4SP AUTO SHOCKWAVE TWIN 3" CUSTOM EXHAUST
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29-01-2008, 09:00 PM
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#35 | ||
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XP Coupe
Join Date: Jan 2005
Posts: 2,098
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Actually gear tooth losses are expressed as a % of load in helical and spur gears. The churning losses tend to be constant.
A typical helical or spur gear mesh has about 2% frictional tooth loss. So if you had, (as illustration) 5 gear meshes running at 98% efficiency the total efficiency would be 0.98^5 = 90%. Even with a lockup converter there are still indirect coupling losses. On top of this there are tailshaft losses and differential/axle losses. |
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