I was hoping some wise toyotian could help me out.

1. How much does the 3vze and the 22re weigh?

2. What is their fuel consumption (lbs/hphr or kg/kWhr)

I know this is probably a stretch, but I figured asking would hurt.

See Post #15

 

1)- alot
2)- too much

sorry, I can't help you...
but I want to ask:
by fuel consumption, are referring to brake specific fuel consumption?

 

"specific fuel consumption"-yes (he did not specify if it is brake or not, so whatever I find will work).

After some research I found the 22re is about 340lbs, 400lbs, or 315lbs. I found the 340 and 400 on one site each, and the 315 on several sites.

The 3vze I found to be 360lbs, 325lbs, or 350lbs (once each).

Thanks for the reply.

 

I think you are being asked to compute pounds of fuel per horsepower hour, or per kilowatt hour. I would do it on horsepower, because you can get engine performance data in horsepower. Things you need to know:

1. Horsepower at RPM. ( Usually a horsepower/RPM curve for your engine will give you this data)
2. Since this is per hour, the easy way to do the calculations is to use RPM at 60 MPH.
3. Your milage at 60 MPH, using your highway mileage is probably close enough.
4. The weight of a gallon of gas

An example-

2800 RPM at 60 miles an hour
Horsepower at 2800 = 120
Mileage 18 MPG
Weight of 1 gallon of gas = about 6 pounds

6 pounds per gallon*(60 miles in one hour/18 mpg = 4.1 gallons per hour) = (24.6 pounds per hour at 120 horsepower 24.6/120 = .205 pounds of fuel per horsepower hour.

To do the problem in watts, convert horsepower to watts.


A calculation of this type is somewhat theoretical, as while speed is a direct function of engine RPM, fuel consumption is a function of RPM and load. If you are driving uphill, your fuel consumption to maintain RPM/speed will be higher than if you were going downhill.

I hope this helps.

 

Thanks for the help. I need it in both units, but I know how to convert it.

 

Very interesting... why are we calculating this?

 

Because my teacher told me too.

I was told to calculate power, torque, BMEP, max/operating speed, mean piston speed, fuel consumption, efficiency, and specific power for 2 engines.

I chose the 3vze and the 22re.

 

I think the block is about 60-70lbs or so. I can pick it up and put it in a car. Not sure about fuel consumption. Hope that helps!

 

i would like see the results of this. could you post them?

 

I am also curious to see the results... it would be nice to know the baselines of our engines...

 

I do not have the results done yet, but I will post them. Beware-they are going to be somewhat rough...

 

http://www.kandn.com/dynocharts/57-9006_dyno.pdf

wow, only 68hp at 3000rpm...

 

...Go Cubs! (Referring to your avatar)

 

cubssuckclub.com

 

I find it interesting how the 3.0 has a better BMEP, specific power, and efficiency...maybe it isn't all bad?

Note-I made a few assumptions.

3vz-e weight=360lbs; 17.5mpg at 60mph at 68hp at 3000rpm
22r-e weight=315lbs; 24mpg at 60mph at 62hp at 3000rpm

Questions, Comments?

 

looks like you almost nailed it on the head.
the v6 offers more power
all it seems it doesn't offer is better MTBF.

 

and fuel efficiency...

 

YES! I thought I only had 115hp.

Stupid question.

Brother has an 86 crx. 90hp/90ft lbs. 2k lbs.

My truck. '91. 115hp/140ft lbs. 2400 lbs.

Who would likely win? Has nothing to do with this thread...but I really want to know...lol. I plan on racing him after I rebuild my engine...lol

 

Very interesting Jason...
looks like the overall efficiency of the 3.0 is higher at the expense of increased fuel consumption...
another interesting note it seems that based on peak torque point half the available horses are doing all the work... so what are the rest there for? show? lol