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Hi John, There's a graph on p13 of the disc I gave you with power outputs for the 1969 FI Auto. It shows a max power output of about 38 bhp at the rear wheels, while the engine is putting out 51 bhp at the same speed on the test bed. Your carbs and auto config would modify that a bit of course, but 20% for yours looks pretty fair compared with 26% for the auto FI. Dave. UK VW Type 3 & 4 Club http://www.hallvw.clara.co.uk/ ------ ----- Original Message ----- From: "John Jaranson" <jaransonT3@comcast.net> To: <type3@vwtype3.org> Sent: Wednesday, September 01, 2004 5:42 AM Subject: Re: [T3] Horsepower at the wheels. > > > On 31 Aug 2004 at 9:09, Jim Adney wrote: > > > >> On 29 Aug 2004 at 23:33, John Jaranson wrote: > >> > >>> So.....for grins I put Sophy up on the Livernois Motorsports dyno and > >>> had them do a couple of pulls. Results were about what I was > >>> expecting. > >>> > >>> Peak HP 46.3 HP at 3900 RPM at the Rear wheels > >>> Max Torque 69.8 ft-lbs at 3300 rpm > > > > One of my manuals shows HP and torque curves. The HP curve peaks at 54 > > bhp at > > 4000 rpm, and the torque peaks at 86 ft-lb at 3300 rpm. This is for a > > bare > > engine on an engine dyno. > > > > I can't help wondering how much loss we should expect in the drive > > train. > > > > The number I kept hearing at the car show was 20%. Rule of thumb was a > 20% loss from the flywheel to the road with a manual transmission. > Don't know about an automatic. I will ask a few of my powertrain > buddy's at Ford this question tomorrow. 20% seems consistent with > numbers I got for Sophy. > > Later, > John Jaranson > '66 Square (Sophy) > '71 Fasty (Jane - darkside project in waiting) > various parts.....don't we all. > http://mywebpages.comcast.net/jaransonT3/jaransonT3/ > http://mywebpages.comcast.net/jaransonT3/2004Invasion/ > http://mywebpages.comcast.net/jaransonT3/notavwclub/ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ List info at http://www.vwtype3.org/list | mailto:gregm@vwtype3.org ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ~ Shameless link for search engines: http://listarchive.type3.org ~ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~