water injection

[Bruce Plecan]

-----Original Message-----
From: Tom Sharpe <twsharpe at mtco.com>
To: diy_efi at efi332.eng.ohio-state.edu <diy_efi at efi332.eng.ohio-state.edu>
Date: Saturday, December 19, 1998 7:41 PM
Subject: Re: water injection

Again, I "think" the source is Sir Harry, but alky made little change,  in
some
early turbo tinkering years ago I found no gain in using alky.
  Also, no gain in using more water than just enough to get rid of
detonation.
Bruce


>My turn to beat the dead horse.
>
>Turbo street motors on 93 premium NL with too much compression and boost
(like
>short-shorts that are too short... right) need a little water under boost
to
>control detonation / temp / power etc. If it also cools the charge, so much
the
>better. Alcohol would also work as would NOx + extra fuel.
>
>I have run a NA gas motor with NOx and alcohol in the NOx system (two fuel
tanks
>and pumps). I think it would have run better as an alcohol motor with NOx
and
>Gas injection. I have also run carburated gasohol at 14/1 compression....
20%
>gas 80% alcohol .... the rules weren't specific.
>
>Maximum Effort Turbo Gas motors need the best intercooling they can find,
and
>water makes a great crutch. so do the others mentioned. Water could help if
the
>entire system was designed from the turbo down with H2O injection in the
mix. I
>also suspect that alcohol would work better than water. Someone needs to
tell me
>50/50 ethanol/methanol/water or ??? works the best.
>
>Max effort Diesels open up a whole new can of worms. As the pullers need 10
>seconds while the European trucks need an hour, their requirements (and
rules)
>are unique. I suspect (but have no proof)  that spiking the water with
alcohol
>at 50/50 would work better than 100% water. I also suspect that straight
alcohol
>at 50% of fuel weight would also work better than straight water. 50%
alcohol
>(33% total fuel??) might be hard to burn, so spike it with gasoline. If you
>could monitor combustion temperatures, adjust the rations as required.
>
>I suspect that some of you are now running to the dyno room with a bottle
of
>Vodka to test out these ideas.  Remember, your results may vary, and there
is no
>warranty expressed or implied....
>
>Merry Christmas  Tom
>
>