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Car Forum / Porsche / Porshe 944 / August 2005air conditioner and fuel economy/miles per gallon
has anyone noticed a significant fuel economy difference when removing an otherwise unused but still installed air conditioner? -bryan : has anyone noticed a significant fuel economy difference when removing : an otherwise unused but still installed air conditioner? Haven't removed mine, but here is 3 years of mpg data for my car... I do run the AC when it's hot... It's my daily driver and I travel a mix of city and highway miles daily.... http://pages.ripco.net/~jwn/tmp/mpg-line.gif Some people say I have too much time on my hands....  SignatureJohn Nelson ----------------------------------------------------------------------------- Chicago Area Paddling/Fishing Page http://www.chicagopaddling.org http://www.chicagofishing.org (A Non-Commercial Web Site: No Sponsors, No Paid Ads and Nothing to Sell) and, for what it's worth, I posted about 15 years of MPG for an 85.5 - the link is in a prior thread on this NG > : has anyone noticed a significant fuel economy difference when removing > : an otherwise unused but still installed air conditioner? [quoted text clipped - 6 lines] > > Some people say I have too much time on my hands.... : and, for what it's worth, I posted about 15 years of MPG for an 85.5 - the : link is in a prior thread on this NG post the link again... google didn't seem to find it... http://groups-beta.google.com/group/alt.autos.porsche.944/browse_thread/thread/e cba2ab8190bd7b2/33b9d75ea0d8facd?lnk=st&q=mileage+group:alt.autos.porsche.944+au thor:nobody@nowhere.com&rnum=1&hl=en#33b9d75ea0d8facd Just interesting in comparing... :> : has anyone noticed a significant fuel economy difference when removing :> : an otherwise unused but still installed air conditioner? [quoted text clipped - 6 lines] :> :> Some people say I have too much time on my hands.... SignatureJohn Nelson ----------------------------------------------------------------------------- Chicago Area Paddling/Fishing Page http://www.chicagopaddling.org http://www.chicagofishing.org (A Non-Commercial Web Site: No Sponsors, No Paid Ads and Nothing to Sell) =============================================== * Reply by Jack D. Russell, Sr. <jackru$$ell2@notmail.com> * Newsgroup: alt.autos.porsche.944 * Reply to: All; "Chicago Paddling-Fishing" <jwn@ripco.com> * Date:Fri, 12 Aug 2005 16:48:45 -0500 * Subj: Re: air conditioner and fuel economy/miles per gallon ===================================================== CPF>william_b_noble <nobody@nowhere.com> wrote: :: and, for what it's worth, I posted about 15 years of MPG for an :: 85.5 - the link is in a prior thread on this NG CPF>post the link again... google didn't seem to find it... CPF>http://groups-beta.google.com/group/alt.autos.porsche.944/browse_ CPF>thread/thread/ecba2ab8190bd7b2/33b9d75ea0d8facd?lnk=st&q=mileage+ CPF>group:alt.autos.porsche.944+author:nobody@nowhere.com&rnum=1&hl= CPF>en#33b9d75ea0d8facd CPF>Just interesting in comparing... http://home.labridge.com:8100/~wnoble/pors_mi.zip SignatureJack : =============================================== : * Reply by Jack D. Russell, Sr. <jackru$$ell2@notmail.com> [quoted text clipped - 3 lines] : * Subj: Re: air conditioner and fuel economy/miles per gallon : ===================================================== : CPF>william_b_noble <nobody@nowhere.com> wrote: : :: and, for what it's worth, I posted about 15 years of MPG for an : :: 85.5 - the link is in a prior thread on this NG : CPF>post the link again... google didn't seem to find it... : CPF>http://groups-beta.google.com/group/alt.autos.porsche.944/browse_ : CPF>thread/thread/ecba2ab8190bd7b2/33b9d75ea0d8facd?lnk=st&q=mileage+ : CPF>group:alt.autos.porsche.944+author:nobody@nowhere.com&rnum=1&hl= : CPF>en#33b9d75ea0d8facd : CPF>Just interesting in comparing... : http://home.labridge.com:8100/~wnoble/pors_mi.zip How about in a internet friendly format... something folks don't have to scan for viruses first.... a graph perhaps... even though my version of Lotus 123 claims to read .xls files, it can't open your version of excel spreadsheet... SignatureJohn Nelson ----------------------------------------------------------------------------- Chicago Area Paddling/Fishing Page http://www.chicagopaddling.org http://www.chicagofishing.org (A Non-Commercial Web Site: No Sponsors, No Paid Ads and Nothing to Sell) some day I may get around to it, I guess. you should be able to open that file in excel or star office - I'ts a few years old now so the office 2000 or later probably has the right version. I used zip to keep the file size down, and it's on a "spare" web page because I don't consider it part of the mission of my "primary" web page (www.wbnoble.com) - there is an aritcle that I published some years ago about an odd "failure" of my 944, by the way, that may interest you. >> How about in a internet friendly format... something folks don't have to >> scan > for viruses first.... a graph perhaps... even though my version of Lotus > 123 > claims to read .xls files, it can't open your version of excel > spreadsheet... =============================================== * Reply by Jack D. Russell, Sr. <jackru$$ell2@notmail.com> * Newsgroup: alt.autos.porsche.944 * Reply to: All; "Chicago Paddling-Fishing" <jwn@ripco.com> * Date:Mon, 15 Aug 2005 18:10:34 -0500 * Subj: Re: air conditioner and fuel economy/miles per gallon ===================================================== CPF>Jack D. Russell, Sr. <jackru$$ell$r@gmail.com.invalid> wrote: :: http://home.labridge.com:8100/~wnoble/pors_mi.zip CPF>How about in a internet friendly format... something folks don't CPF>have to scan for viruses first.... a graph perhaps... even though CPF>my version of Lotus 123 claims to read .xls files, it can't open CPF>your version of excel spreadsheet... Watch out for wrap and see http://www.microsoft.com/downloads/details.aspx?FamilyID=c8378bf4-996c-4569-b547 -75edbd03aaf0&displaylang=EN . MS' own excel Viewer 2003 is free. Hope it helps. SignatureJack "" wrote: > has anyone noticed a significant fuel economy difference when > removing > an otherwise unused but still installed air conditioner? > > -bryan All you’ll save is weight. I imagine there is not much draw on a idle a/c to make much of a difference in gas mileage. > > has anyone noticed a significant fuel economy difference when removing an > > otherwise unused but still installed air conditioner? [quoted text clipped - 3 lines] > All you'll save is weight. I imagine there is not much draw on a idle > a/c to make much of a difference in gas mileage. ... and even if the belt were taken off of the a.c, wouldn't the overall engine balance be off? -bryan p.s. thanks for all the data. "" wrote: > > > has anyone noticed a significant fuel economy difference > when removing an [quoted text clipped - 12 lines] > -bryan > p.s. thanks for all the data. I would say no because your engine is ballanced internally. If there is no belt on it it would maybe give you 4hp since your alternator isn’t dragging it down. aaah, guys - let's just suppose you are rigght about the 4 hp - now let's see here, aprox 750 watts per horsepower, so if you were to actually gain 4 HP, that's 3,000 watts of power that previously had been going somewhere. Now, siince the only change was to stop rotating the pulley on the AC pump, it means that the bearings on the front of the pump had been eating 3,000 watts. If your AC pump is not glowing bright red when you stop driving the car, I'd say that there is no way it's eating 4 HP. maybe .001 HP (a watt or so), but no more. > "" wrote: > > > > I would say no because your engine is ballanced internally. If there > is no belt on it it would maybe give you 4hp since your alternator > isn't dragging it down. |
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