Quote:
Originally Posted by racprops
To answer Isaac:
Forced induction is a POWER TRIP not any thing else...the use of turbos it to allow smaller engines with greater power out of them...and of course GREATER ware, and GREATER costs to repair and fasted wear out and sooner replacement sales of new cars.
A WIN, WIN, WIN for the car makers and dealers.
My 03 Fords 4.6 V8 have a rep for lasting 100 to 150K in police duty, then sold to Cab companies and they getting another 100 to 150K more use and even then IF you want to keep going a set of heads usually does it for another 100 to 150Ks.
My 03 Crown Vic as 185K and my 03 Explorer has 215K on it and did need a set of timing chains and the 5R55s need rebuilding of its real original 208K on it.
I fully expect to get a minimum of 60 to 100K out of these cars.
Rich
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I wasn't asking a question. Just an observation.
The volumetric ratio of liquid gasoline to air is about 8900:1 when the ratio by mass is 14.7:1 and the gasoline is a liquid. If you boil the gasoline into a gas then your volumetric ratio is now closer to 14.7:1.
In other words, if you have a 1L engine that is running at 14.7:1 AFR and it's 100% volumetrically efficient, then for every intake cycle it will ingest 999.888mL of air and 0.112mL or 4.289MJ of gasoline if the gasoline is liquid.
If you heat the fuel into a gas then your volumetric ratio becomes closer to 936.842mL of air and 63.694mL of gasoline, but now you have only 4.02MJ of gasoline, a drop of 6.3% power output.
And that's not including any more expansion for any additional heat. Some parts of gasoline don't vaporize into way past the 200 °F mark. If we heated up all the air and fuel to those tempuratures you'd lose another 20% of the mass of the air, and therefore another 20% of the fuel. So at the end of the day, heating gasoline up to full vaporization would yield a net loss of power of over 26%.
Of course this doesn't include any efficiency gains, which would counteract the loss of power through displacement caused by vaporized fuel.