450sx part 2

[g6civcx]

removed as requested

[Def]

Originally Posted by g6civcx

How is BSFC related to throttle position and minor fluctuations in speed?

There's a BSFC curve for every throttle position. RPM is related to speed. Unless that's a rhetorical question, in which case I've got nothing.

[g6civcx]

removed as requested

[racepar1]

Ok guys, who gives a rat's fucking ass about fuel consumption here? The OP doesn't and neither do I!!! Take your bickering to PM so the rest of us can enjoy the build. And seriously g6civicx, arguing about fuel consumption when you have a carburated 350 chevy under the hood? Get real!

[g6civcx]

Originally Posted by racepar1

Ok guys, who gives a rat's fucking ass about fuel consumption here? The OP doesn't and neither do I!!! Take your bickering to PM so the rest of us can enjoy the build.

I asked a question. I have no position so how can I bicker?

If you don't like the questions then I am sorry but I did not bring up the topic.

Originally Posted by racepar1

And seriously g6civicx, arguing about fuel consumption when you have a carburated 350 chevy under the hood? Get real!

First, nowhere am I arguing. I am asking because I want to know.

Second, I have many cars, not just one. What makes you assume everything is about that one car? Any additional followup may be done on PM as this does not concern anyone else.

If you don't like what you see, please ask a mod to prune. I'm just responding to what others have said.


I am leaving this post as a rebuttal to accusations about me that may or may not be true. I do apologise for participating with others who brought up a tangential topic. Please go to the other thread if you want fuel economy.

[Def]

Originally Posted by g6civcx

What I mean is that you generally don't hold a steady cruising speed.

You generally slow down a little bit and speed up a little bit even when cruising.

So it's not practical to calculate the max point of the BSFC curve for a single speed.


So would a single max point on the BSFC or more like an RPM range, say 500RPM or 1000RPM range, that would make more sense to analyze for fuel consumption?

I never said anything about a max POINT of BSFC. It's a curve, there will be a minimum which will move around wrt RPM depending on other variables.

Changing speed slightly or not, the BSFC curves for say every 10% throttle opening will show you where an engine is most efficient.

Enough of the tangent, BSFC and how it relates to fuel economy isn't that complicated. I'm sure there's a wikipedia article on it or something.