[Diy_efi] RE: Timing and dyno pulls

[A6intruder]

Back in the 1980's Smokey Yunick (I might have spelled that last name wrong)
was running some 4 cylinder Chrysler engines with the blocks made of silicon
carbide (I think).  It was some ceramic type material anyway.  No cooling
jacket at all, every part special made, turbocharged and I can't remember
but I think he was sucking through a carb (could've been fuel injected).
These little 4-bangers turned tremendous power.  He was trying to get great
performance and fuel efficiency by not sending the traditional 1/3 of the
BTU's out through the radiator.

It was a bizarre setup that ran apparently very well but I suspect was quite
expensive to build at that time.  I never heard much after reading that
article but the think supposedly ran great, like your melt-down Eclipse but
longer.

Daniel R. Nicoson
Equipment Exchange Company
Phone:  (814) 774-0888
Fax:      (814) 774-0880

-----Original Message-----
From: diy_efi-admin at diy-efi.org [mailto:diy_efi-admin at diy-efi.org]On Behalf
Of Joshua Wingell
Sent: Thursday, December 19, 2002 1:21 PM
To: diy_efi at diy-efi.org
Subject: Re: [Diy_efi] RE: Timing and dyno pulls

On Thu, 19 Dec 2002 13:12:38 -0500
  Dave Dahlgren <ddahlgren at snet.net> wrote:
>There is also no rule I have ever
>heard about keeping heat
>out of the cylinder heads. It is a heat engine. more heat
>more power. If you
>keep the heads cool you lose power warming them up. Make
>a pull at 130 degree
>water temp and one at 190...

To support this...

In May of this year, I blew my headgasket at the track
(forgot to install the head location dowels when I
installed the head!) on my 97 Eclipse GSX.

I didn't notice it right away, though.  I made another
pass.

I think the head was partially or completely devoid of
coolant.  The extra heat in the combustion chamber caused
the car to run like a raped ape. It was pulling harder
than I've ever felt it pull before, and with fuel settings
about 7% richer than they ought to be. 90.5 in the 1/8th!
Doh! 12.52 at 112mph with a lousy 1.88 60-ft.

I noticed that my radiator hose was empty just before the
next pass.  I mentioned that I thought I blew my
headgasket to a friend.  He asked, "What did you run?"
 "12.52 at 112mph"  "Riiight, sure sounds 'blown' to me."

Well, it was.  I put in some more coolant and I ran
anyway. But it felt strange. So I let off. I ran a
12.6 at 110.8mph letting off in 3rd and 4th gear.  Blew my
dipstick out.  Upper radiator hose was dry again.

These runs were on VP C16 117 octane leaded fuel, btw.

If only I could replicate that power without the
inevitable melty-ness that would accompany the extra heat.


Josh

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