[Diy_efi] RE: Timing and dyno pulls

[Dave Dahlgren]

Well you can.... Insulate the head and pistons and cylinder walls with the
appropriate coatings. Raise the cooling system preuure a lot.. A Nissan ZX GTP
Turbo car runs coolant pressure around 50 psi static.. Dead soft copper head
gasket with gas filled o-rings and very large studs to keep everything clamped
down tight..Oh yeah fill the bottom 1/2 of the block with 'hard block filler'
lots of companies make it. Might need some better valve seats as well but that
is no real biggy to be honest. You probably never got the thing over 230 to 240
in the first place..
There you go easy as that. 
Dave

Joshua Wingell wrote:
> 
> 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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