[Diy_efi] WI, methanol, and corrosion

[Bill SHURVINTON]

Actually I think the answer is fairly easy on this one: weight and duty
cycle. For street or strip use the time at max power is no more than about
20 seconds at a go, followed by a cool down (or even strip down) period. On
the track, you could be up to 80% of your time at full throttle. In the
motorsport case (and I believe you are referring to the WRC zetec) the
additional ballast of enough intercooling could be enough to render it
unattractive. On a street application, you may end up interwarming as much
as intercooling.

Example. The original Ford escort cosworth sold for homologation purposes
had twin intercoolers. One air:air, the second air:water. How often on the
road do you get to the point where an air:water unit, running off the engine
coolant will reduce heat rather than increase it? But on a rally stage it is
probably very useful.

It's all about compromises.

Bill

----- 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: Thursday, January 30, 2003 10:07 PM
Subject: Re: [Diy_efi] WI, methanol, and corrosion


> --- Axel Rietschin <Axel_Rietschin at compuserve.com>
> wrote:
>
> > Anyway, your explanation leaves me with a question:
> > why one onf the biggest name in motorsports, one
> > with "unlimited" R&D and resources,  is using an IC
> > and port WI if there is some free lunch in not using
> > one and injecting water earlier?
>
> Wow, there's a question for you.  Not working in their
> R&D department, I can't say for sure, nor would I
> probably be allowed to if I knew.  ;)
>



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