[Diy_efi] More power from a blown head gasket

[Joshua Wingell]

Mike wrote:
>Thats where your raped ape got its extra power, from
>water in the chambers - enough to perhaps increase CR
>(effectively) and reduce pinging for the short period of
>time,

That did occur to me.  However, my spark plugs weren't 
green from the coolant.  And I was spewing a lot of 
coolant from the oerflow.  My coolant hoses were 
definitely pressurized by the combustion.  I think that 
the major flow was out of the combustion chamber, not 
into. 

Also, since I was running 7% richer than normal and a 
degree less timing than I normally do, I wouldn't have 
been taking advantage of the water in the combustion 
chamber.

You need to advance timing, run more boost, or run leaner 
to take advantage of water injection.  I was running less 
boost, richer, and retarded timing.

Oh, here is a jpg of the datalog.  I also have a CSV I can 
share.

http://autos.groups.yahoo.com/group/NewEngDSM/files/12_52_112datalog.jpg

>Do you normally run a wet manifold ?

I assume that you mean water injection?  I have run it in 
the past.  But I wasn't impressed with the results that 
the silly spearco kit gave me.  I'll probably build a DIY 
kit sometime in the next year, though, if only to spray my 
rather small 18" FMIC.

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