Qouted from Holleys site.

why does this soudn wrong to me

Therefore an engine rated at 350 horsepower will require about 175 pounds (29 gallons) of fuel every hour.
(350HP x .5lbs = 175 lbs of fuel, 175 lbs/6 lbs = 29 gallons per hour)

 

Seems to me the gas consumption would be dependant on the number of RPMs it was turning as well as other environmental factor. An engine at 500 rpm is using 1/10th the gas of an engine at 5000 rpm (roughly) There are other factors involved as well such as intake air temperature, the temperature inside the actual cylinders, how well exhaust is being scavenged out of the cylinder. You just can't peg an engine as requiring a exact amount of fuel unless it was programmed to just continually dump the same amount of fuel each cycle, and it also ran a consistent number of cycles over an hour which auto engines don't do.

 

yeah but it sounds like what they are saying is, a corvette, if it ran for one hour at 5000rpms (or whatever rpm it makes 350hp) it will run out of fuel in one hour.

 

Engine load versus coefficient of aerodynamic drag, vhhicle weight, road incline or decline, loss through drivetrain, coefficient of friction between tyres and road, engine load imposed per set of gear ratios taking all above factors into account?

Uhhhhh guys where did they pull these numbers from?

 

what holley is stating, is that in general, to make "X" hp you need "X" fuel flow.

The "X" fuel flow is actually OVER the amount you would need for that "X" HP, but you always want to make sure your fuel pump over supplies rather than undersupplies.

True, the engine would only need that full 29 gallons of fuel per hour if it was running at it's HP peak producing 350 hp. If you are just crusing around town, you don't need all that fuel. That is why we have fuel pressure regulators and fuel return lines. The fuel pump always supplies it's max ability at stock fuel pressure, and the excess flows back via the return line.

I think their calculations are a tad off as well.

Check out what www.rceng.com has for their calculator.

 

well, I can say from personal experiance that our cars(the 1.6L anyway) absolutely sucks gas at WOT for extended periods.

A couple of weeks ago, I took my car to a driver's education event. During this event, I put 92 miles on my car in 80 minutes(total driving time spread out over 4 20 minute sessions). My car averaged just over 10 mpg during this time!!

If you do the same math for my car during this time you come up with this;

108 hp X .5 = 54 lbs of fuel, 54/6 = 9 gallons per hour.

This is actually pretty damn close to what I experianced on the track! But, if Hyundai would not have made our cars run soo rich at high rpms(5200+ rpms) then my car probably would have gotten better gas mileage.

 

Moving to the engine forum....

 

I'm not sure how the hell your 1.6L was able to pull 10mpg...

My Tiburon project pulls better than 30mpg on the highway, and gets around 25mpg in the city. This setup isn't conducive to fuel mileage either, so don't tell me how radically different your car is.

 

Red the point is that was at the TRACK. As in, constant 4000-6000 running. That's where the sucking gas comes from. If you ran down the highway in 1st or 2nd gear at speed, I bet you would get 10mpg as well.

although I really don't see the problem...my truck gets 10mpg on a daily basis...

 

The last track day I had (granted, two years ago) was with the stock motor and ALL the bolt-ons. On 3/4 of a tank of gas and probably 30mm missing from my tire tread, I still ran right above 20mpg.

For a 1.6L to get 10mpg is absolutely ludicrous. Even Joel's Civic Si he had at the time got better mileage than that...