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Search took 0.05 seconds. Search: Posts Made By: ST2008
Forum: General Efficiency Discussion 07-11-2016, 01:24 PM
Replies: 20
Views: 3,445
Posted By JRMichler
And let's not forget the other variables -...

And let's not forget the other variables - temperature, wind, road grade.

My mileage changes almost exactly 1 MPG per 10 degrees F, 1 MPG per 5-10 MPH wind speed, and about 2 MPG for an elevation...
Forum: General Efficiency Discussion 07-11-2016, 08:43 AM
Replies: 20
Views: 3,445
Posted By Ecky
My car has a complex fuel economy display, and I...

My car has a complex fuel economy display, and I know exactly what my fuel economy is at any given point. When I pull into the pump, I know what the tank is going to take within a tenth of a gallon,...
Forum: Instrumentation 07-10-2016, 04:11 PM
Replies: 23
Views: 7,096
Posted By ksa8907
I also use torque pro. It seems to incorrectly...

I also use torque pro. It seems to incorrectly use psi instead of inches of mercury when displayi g vacuum. The 21 psi you see is actually 21 inches of vacuum.
Forum: General Efficiency Discussion 07-10-2016, 03:23 PM
Replies: 20
Views: 3,445
Posted By jakobnev
Maybe you have a leak.

Maybe you have a leak.
Forum: Instrumentation 07-10-2016, 02:41 PM
Replies: 23
Views: 7,096
Posted By oil pan 4
Yes most engines use a fuel pressure regular that...

Yes most engines use a fuel pressure regular that is vacuum referenced.
Forum: Instrumentation 07-10-2016, 01:59 PM
Replies: 23
Views: 7,096
Posted By redpoint5
Your car should be throwing a check engine light...

Your car should be throwing a check engine light if there is an issue with anything relating to emissions. Running rich would be one of those conditions that should trigger a CEL.

You will use the...
Forum: Instrumentation 07-10-2016, 12:36 PM
Replies: 23
Views: 7,096
Posted By redpoint5
Higher load is better for any given speed. Here's...

Higher load is better for any given speed. Here's the explanation...

There are 2 ways to make more power:

1. bigger explosions (more torque)
2. more frequent explosions (more RPM)

Consider...
Forum: Instrumentation 07-10-2016, 11:14 AM
Replies: 23
Views: 7,096
Posted By Ecky
I feel redpoint5 and elhigh have very thoroughly...

I feel redpoint5 and elhigh have very thoroughly explained how vacuum works. For practical purposes though, all else being equal, more vacuum means you're demanding less power from the engine, and...
Forum: Instrumentation 07-10-2016, 10:16 AM
Replies: 23
Views: 7,096
Posted By elhigh
Engine vacuum is generated by the pistons...

Engine vacuum is generated by the pistons descending in the cylinders, pulling in air. But at less than wide open throttle, there is resistance and the cylinder is pulling a vacuum behind the...
Forum: Instrumentation 07-10-2016, 07:44 AM
Replies: 23
Views: 7,096
Posted By redpoint5
Are you referring to the MAP gauge? It's...

Are you referring to the MAP gauge? It's impossible to have more than about 14.7 PSI of vacuum because that is the density of the air. The only way to have more vacuum is to have denser air.
...
Forum: Instrumentation 07-10-2016, 04:56 AM
Replies: 23
Views: 7,096
Posted By redpoint5
The power and speed of regular gasoline engines...

The power and speed of regular gasoline engines is controlled by restricting air to the cylinders by varying the throttle, which is a valve that restricts airflow to the engine. Whenever the throttle...
Forum: Instrumentation 07-10-2016, 04:48 AM
Replies: 23
Views: 7,096
Posted By oil pan 4
The relationship is dependent on the engine and...

The relationship is dependent on the engine and drive line.
Vacuum developed tells you how inefficient your engine is.

The idea is a vacuum reading too close to atmospheric pressure on a normal...
Forum: General Efficiency Discussion 07-09-2016, 04:42 PM
Replies: 20
Views: 3,445
Posted By redpoint5
The weight of the fuel can't make a perceptible...

The weight of the fuel can't make a perceptible difference in MPG. Your method of calculating MPGs is either not accurate, or other variables are at play. I can have 1,000 pounds in the back of my...
Showing results 1 to 13 of 13

 
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