Mr. Mayfield I never said you did not know that much about turbo
charging or ever meant to discount what you have done or will do in the
future, All I tried to suggest is that this is a very complex subject.
I took the time in reading your response to check your home page. Very
nice indeed. As far as being a lurker, well I have a business designing
and manufacturing induction and electronic systems for race vehicles.
Most run what is now referred to as the 'Petite Le Mans series'. On
occasion I do some work with teams in the drag racing arena, mostly
turbo charged cars and have done rather well with it. I also do new
product development for several automotive after market companies.
These people keep me very busy here I work generally 10 hr days 6 days a
week at this time of the year. So most times I pop in see what is going
on and offer what i can. So if that is a lurker then i guess i am. As
far as background in what i do, have been racing professionally as an
engineer,not driver, for about 25 years, so i have been at this long
enough to have a small clue. I could list a bunch or cars and races but
would be rather self serving in the long run so will not bore you with
any of that.
As far as the Cosworth DFX 2.65 liter making those hp #'s well they do
they are that good. A naturally aspirated one will produce 450 hp at
11000 rpm with 11/1 compression ratio. The standard Indy car setup is
good for 740hp on the later ones. Turn the boost up and it gets very
exciting ! If you doubt this can always call them....1-310-534-1390 ask
for KEN JACOBS if he is around, although he is hard to get at times.
Could also get in to the things I look at when designing a turbo setup..
there are several that do seem to elude some people at times and would
be more than glad to share my thoughts with you if you have any interest
in that. In general it all comes down to air density calculations and
the pressure across the turbo, boost vs. back pressure.
You might find a book that i refer to from time to time an interesting
read, Internal Combustion Engine Fundamentals, by John Heywood. It is
very informative in many areas. You might also look at the relationship
of intake port area vs rod ratio, it shows a very interesting pattern
directly related to the peak mach #'s in the intake port..Many mysteries
will disappear with this relationship plotted...
Have a good day did not mean to bash in any way, just a very busy person
here and never been known for being tactful in the last 47 years or so..
Regards,
Dave Dahlgren
Engine Management Systems
"Lawrence E. & Cathy R. Mayfield" wrote:
>
> I was recently informed that I didn't know much about turbo or how to
> select them after sending out my thoughts on the subject. Ok, so please
> disregard any turbo input that I may had sent and any future info from me.
> Rather than pass along my thought on the subject I'll simply lurk like the
> experts.
>
> L.E. Mayfield
> 124 Maximillion Drive
> Madison, Al. 35758-8171
> 1-256-837-1051
>
> http://www.hsv.tis.net/~mayfield
>
> DrMayf@AOL.com
> lemay@hiwaay.net <<<<preferred
>
> Bonneville Land Speed Racer, '66 Hydroplane Drag Boat (390 FE)
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