[DeTomaso] Predicted mileage at 200 MPH

[Peter Kovacs]

By those standards, my suburban outperforms your Vette even when towing a loaded trailer. I am proud now!....Proud and broke when leaving the gas station.
 
Peter Kovacs
Property Equity & Mortgage Mgmt
209 345-6708 
209 523-4919 fx



----- Original Message ----
From: Visit ProvaMo.com <pantera007 at sbcglobal.net>
To: Ken Green <kenn_green at yahoo.com>; detomaso at realbig.com
Sent: Wednesday, April 4, 2007 3:11:54 PM
Subject: Re: [DeTomaso] Predicted mileage at 200 MPH


Since we are talking Vette, I’ll state I drove both a ’79, and ’84… I forget which
one had the
instantaneous fuel mileage trip computer thingy.  It was a common practice of
Vette drivers
to attempt to reach “Nirvana”.  That was when your indicator displayed 0 MPG (when
moving forward).
(when not moving forward, it was blank.)  Spinning the wheels made the system
think you were moving forward.
I believe later GM adjusted it to read off the front wheels, to assist in the
goal – grin.
I think there was a SW limitation (avoiding the dreaded divide by zero) where I
could only reach 1 MPG,
no matter how I tried, and tried, and TRIED.

Chuck


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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