[Diy_efi] COP

[Bevan Weiss]

Yeah, don't worry my dream includes a head redesign ofcourse (it's a dream
after all)
I'd actually want quite a bit of added complexity...
Slightly off EFI subject though...
Really want something like a 4valve per cylinder configuration, this allows
better use of the gas momentum to improve volumetric efficiency at low rpm
whilst still maintaining high rpm flow.  Have the valves staged, such that
at low revs only one intake and one exhaust is open.  When you get into the
high revs both intakes are open and both exhaust are open.  Possibly have
the valves as one small and one large (ie 4cm^2 and 16cm^2 or so) such that
you could have different flow areas for different revs as well... allows for
far more calculations :D

Even better would be electronically controlled valves, which I haven't heard
anything about for a while.  If variable overlap and variable valve opening
could be controlled via microcontroller that would be perfect...

----- Original Message -----
From: "Adam Wade" <espresso_doppio at yahoo.com>
To: "List for general do-it-yourself EFI talk" <diy_efi at diy-efi.org>
Sent: Sunday, March 16, 2003 6:18 PM
Subject: Re: [Diy_efi] COP


> --- Bevan Weiss <kaizen__ at hotmail.com> wrote:
>
> > I've got a dream to put all the modern features on
> > an old A-series engine, 1275GT mini to be more
> > precise...
>
> You're in serious trouble if you keep the standard
> intake ports.  Changing to a 4-port head would be a
> huge step forward.  Without it, you're unlikely to get
> very good results in terms of fuel distribution
> (didn't we just have this conversation about a month
> ago?)...
>
> > I'd almost want the coil to look like a normal spark
> > wire boot.
>
> All modern sportbikes use the pencil coils.  ZX-9R,
> ZX-6R, CBR954RR, CBR600F4i, R1, R6, and so on...  you
> should be able to find sets from a breakers for next
> to nothing, with the rate at which people crash the
> things.  ;)
>
> =====
> | Adam Wade                       1990 Kwak Zephyr 550 (Daphne) |
> |   http://y42.photos.yahoo.com/bc/espresso_doppio/lst?.dir=/   |
> | "It was like an emergency ward after a great catastrophe; it  |
> |   didn't matter what race or class the victims belonged to.   |
> |  They were all given the same miracle drug, which was coffee. |
> |   The catastrophe in this case, of course, was that the sun   |
> |     had come up again."                    -Kurt Vonnegut     |
>
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