[VintageLambo] Re: 400GT on a chassis dyno...

Fred, I since found and corrected the problem I had above 5500 rpm. It turned out to be one of two crank sensors for the engine management system that had pushed its internals so close to the trigger-wheel, that it intermittently touched and confused both the fuel and ignition timing (bad sensor design). With that functioning again I may have gained 5-10% in max HP and with optimum timing for 91 octane (as opposed to the 87 octane I normally use) maybe another few per cent. Remember these are wheel HP, which a 15%-20% more "valuable" than engine HP. However my "dyno-guy" has closed shop, so I have for this and other reasons purchased a data-logger from Race-Technology http://www.race-technology.com/WebPage/Products/Logger/DL90Home.html which is based on accelerometers and GPS. I have yet to use as a "road dynamometer". Here is a little "fun with horses" as I see it. There are calibrated wheel horses (very valuable and useful, WHP), calibrated engine horses (almost equally valuable, just more of them, HP), perception horses (perceived power addition from good exhaust noise, PHP), cocktail party horses (horses that require little more than a quick remark at a cocktail party to create, CPHP). Some relationships: WHP = 85%*HP, both quite repeatable. Typically PHP > HP – WHP and less repeatable. CPHP >= HP,sometimes CPHP = HP + PHP and is often highly unstable. Best regards, Laust --- In VintageLambo@yahoogroups.com, "lamboguy " wrote: > --- In VintageLambo@yahoogroups.com, wspohn4@a... wrote: > > In a message dated 1/9/03 5:55:39 AM Pacific Standard Time, > RVosari@a... > > writes: > > > > > > > The motor made around 220 HP, which was comparable to say a 330 > > > Ferrari motor OR around 280 HP at the flywheel. > > > > > > > Do you recall where the peak power was? > > > > Bill > > Hey Guys, > > Laust has a nice writeup on this at: > > http://home.earthlink.net/~laust/espada.htm > > >>I finally had a chance to put the car on a dyno. The 247HP and > 208ft-lb at the rear wheels do not look that impressive, but the fuel > mixture was much too rich (black smoke) above 5500 RPM and the valves > float (weak springs) above 7300RPM. This is on 87octane gas. Note the > relatively flat torque curve within 25% of max from 1175 to 7250 RPM. > > He"s got some performance curves there as well.And that"s after > fixing his motor up.Nice to have some "real" data available to us! > > Cheers, > > Fred