Paul, In most cases you can get away with at least a little timing advance without upgrading fuel. As long as you're not "knocking" or detonating then you're ...
... you lean up the mixture and use higher octane fuel? Yes, lean mixtures burn more slowly than rich mixtures, so it takes more time for the pressure to...
Greg, Paul -- Thanks for all the good info! And that was a really great superbowl. The best, except for when Denver beat Green Bay. Some questions remain: 1....
... injected car? I thought this was essentially fixed at stoichiometric. Only when in closed loop. Typically they run very rich near full power, when they...
A lean mixture generally produces a hotter flame kernal, it it's lean enough, and hence hot enough, it can actually burn the surface of the piston, and cause...
greg --Hmmmmm? don't want to bog you down with things I could and should look up, but: closed, open loop? a/r ratio? Fuel injectors -- I'm not talking about...
Paul -- wow. now I see the daunting challenge some of my missives must present for others to respond to! let's see -- I don't think I need flow in my...
... but: closed, open loop? a/r ratio? In closed loop mode the EEC controls the mixture using a feedback loop, using the signal from the EGO sensor to keep it...
... lean ... the ... of "safety", most ... believe, to ... Un huh. ... mileage ... Are you telling me that the same car, fitted with a modern engine and engine...
http://www.greenhouse.gov.au/transport/env_strategy/study_nafc/executi ve_3_9.htm has a lot of interesting data in for those of us interested in fuel economy....
Greg, 2 quick questions: 1. Is lambda=stoich, and if so, does 1.07 lambda mean leaner (greater a per f)? 2. Why does a cat cause worse fuel consumption? I...
... Cd of Burt Rutan's GM Ultralite was 0.19, and it's a practical, roomy 4-seater that could be made in production, even if steel were used in place of carbon...
Greg could you clarify a term used in the link you gave? The mean power of the test car is given in kW/t. How would the actual power used during operation be...
... (greater a ... Yes, 1 means stoich, 1.1 means 10% excess air ... mixture ... Because current cats operate at stoich. If you can afford to operate with...
... surface area and the size of bearings etc, which inherently are tied to engine capacity" ... both of fuel efficiency and of the English language. I think...
... Just multiply the kW/t b the cars weight in tonnes, 1.6 in this case, and to get horsepower multiply by a further 1.3. In other words, double the kW/t to...
I'll agree with the statement that a larger engine will have more friction, certainly. I just don't see that engine friction is the PRIMARY reason that larger...
As I understand it, there are a large number of interacting factors effecting this, so the optimum is the best compromise. This best compromise changes many...
wooo looks like someone didn't learn anything from the demise of the Del Sol. ... From: Isaac To: highefficiencyvehicles@yahoogroups.com Sent: Friday, February...
No, they just didn't go for the whole sporty car that's slow idea. I know, I own a Del Sol. It's the fact that yes, it's a convertible, yes it's a two...
... sec 0-60 out of 100 hp in a 1750-lb. car. Seems pretty poor to me, looking at accel times for MUCH heavier cars with around 100 hp, like Honda Civics. I...
I just looked at it and went small? check. cool looking? check. better than 40mpg highway? check. gonna have to drive one... ... about 10 ... like ... ...
http://www.netl.doe.gov/scng/projects/adv-recip/are41334.html http://www4.ncsu.edu:8030/~mfhabel/e497/railplug.html Sounds like a nifty way to light off a lean...
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