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Re: [VintageLambo] Re: Espada Brake Vacuum

djlconrad

Dennis: GM does not own H1, they only own or Bought Hummer as the H2 was being incorporated into Production, if you see GM ads you will note the H2 is right part of the name and listed so. As far as the Fuel Injection System and throttle lag or more correctly, changes in Injector Pulse Width, to accomodate Throttle Angle and/or Load Changes, (accel enrichment) without some input or feedback is more reflective of the BAUD Rate Speed. The early OEM Computers for Cars had a Baud Rate of 128, then 255, and as new models or system upgrades came along the Baud rates became more like PC"s, with current standard Closed Loop Feedback systems, the Oxygen Sensor as one of the main two sensors in the system, is capable of 3 three Crosscounts .200v to .600v in 1000th of a second, so the Fuel can be kept more closely at Stoiciometric (14:1 A/F Ratio). In reference to the Carb, the Venturi allows the Air that is pushed into the Carb by Atmospheric Pressure to Speed up thereby causing a pressure drop in the area of the Venturi to facilitate Fuel to flow from a higher pressure area, (Fuel Bowl Atmospheric Pressure) to this lower pressure area thereby adding this emulsifying fuel into the airstream in the manifold. The Accelerator Pump provides a slightly richer mix of F/A for the sudden opening of the Throttle Blades and the abrupt change in Air Speed into the Manifold. Yes, agreed Newer aftermarket Digital Fuel Inj. as Accel Digital FI is a major improvement over the older MAP Sensed non feedback non Closed Loop of just a few years ago systems like Holley, Edelbrock and a few others. Dave ----- Original Message ----- From: "Dennis Briddell" To: Sent: Sunday, April 04, 2004 6:01 PM Subject: Re: [VintageLambo] Re: Espada Brake Vacuum > That makes sense. I do know the civilian trucks converted to mineral > fluid for the mandated ABS on US cars. Aparently silicone isn"t > compatible with ABS brakes because the system traps air. The military > trucks never changed. In fact GM only owns the marketing rights to the > H1. AMG is still a privately owned company and still makes the H1 on the > military production line for GM. > > To bad you are on the other side of the continent. I really like the > Espada and would love to see your car. Hopefully the Pocono event in > June will have some nice examples. As for the Motec, there is no > throttle lag with accel enrichment disabled, in fact it runs best with > no enrichment. It took a long time tuning the accel mode before reaching > that conclusion. The Motec ECU responds intantly to sensor inputs (I > think this is a reflection of the quality of the algorith and/or the > power of the CPU). Whereas the carb uses the venturi do draw fuel, which > can have some lag, requiring the accel pump. Anyway, modern aftermarket > EFI has pretty amazing capabilities. > Dennis > > Laust Pedersen wrote: > > >Dennis, > > > >The subject on brake fluid is debated on a prior thread and to re- > >iterate my views: The only downside to silicone, which I have been > >able to find, is its willingness to absorb oxygen, which is a > >problem during rapid elevation changes (for example Pikes Peak Hill > >Climb). To my knowledge all branches of the US military uses > >silicone fluid which may explain the change to your Humvee when GM > >got their hands on it and in the process they probably had a well > >developed (and cheaper) substitute for the master cylinder. > > > >There are many solutions to engine management systems and using TPS > >as the sole load indicator can obviously be done, but it will rarely > >be a linear function (load vs. voltage) So it will require > >compensation elsewhere, such as the VE table. The TPS-MAP mixing > >turned out to give a more linear function than either of the two, so > >that"s what I stayed with and after lots of trial and error it works > >q