[DeTomaso] Predicted mileage at 200 MPH

[Ken Green]

Mark,
   
       I realize that, but I was just looking at part of the problem.  
   
       It's also true that a Z06 Vette gets twice the mileage of a 66 425 HP Vette (I had one) at 70.  If you're still running a carb, maybe you'd get 10 MPG with EFI?
   
       I think a lot of gas is burned to keep the engine spinning, so even though the wind resistance goes crazy at 200, it isn't the whole story, and your carb may provide a rich mixture under acceleration.  I suppose there are articles on that.
   
  Ken

Mark McWhinney <msm at portata.com> wrote:
  ORRs are not steady state.

With around 350 HP, I get less than 5 MPG on a road track with the repeated
30-130 MPH acceleration and braking.


-----Original Message-----
From: detomaso-bounces at realbig.com [mailto:detomaso-bounces at realbig.com] On
Behalf Of Visit ProvaMo.com
Sent: Wednesday, April 04, 2007 2:01 PM
To: Ken Green; detomaso at realbig.com
Subject: Re: [DeTomaso] Predicted mileage at 200 MPH

Didn't Junior Wilson run out of gas during one Open Road Race attempt?

Something like 3 MPG? Jack DeRyke???

Chuck
Out of curiosity, I tried to estimate how much gas would be burned to travel
100 miles at 200 MPH assuming 500 HP is required to maintain speed. I came
up with:


1 HP = 42.21 Btu/min
so, 500 HP = 21,205 Btu/min at 100% efficiency energy conversion
but assuming 33% efficiency, 500 HP requires 63,615 Btu/min

1 gallon of gasoline contain 115,000 to 125,000 BTUs

at 120,000 Btu/gal, 500 HP will burn about 1/2 gallons per minute
so, at 200 MPH, it takes 30 minutes to travel 100 miles, and 15 gallons of
gasoline.

It seems reasonable, about 6 MPG. I've never done this kind of
calculation before, does anyone see an obvious error?



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