Re: HFS-4 Q&A, application for your engine...
I am going to be setting this up on a 1.9 litre M44 BMW engine with stock internals and compression with a Downing Atlanta Supercharger running approx 10-11Psi Max boost. It will have a custom ECM tune configured to run 93 (USA) octane petrol through a set of 42Lb/hour injectors and flowing through a 3" MAF. The tune will not depend on the water/meth for safety so I can run without the Aquamist running without danger, but I want to add the water/meth to lower operating temps in the supercharger and to add the extra safety factor of increased effective octane of the water/meth. I know there will be a performance increase running the Aquamist as the cooling effect and increased volumetric efficency.
I am curios as to where best place the injectors, I am leaning towards pre-supercharger but wonder if pre throttle body or past is best and if maybe the injector should be placed very close to the supercharger as I can get a nozzle to spray directly at the end of the rotors in this setup. Any suggestions?
I am also curious as to the proper size for the nozzles? The basic system should put out around 210HP at the rear wheel and about 250-270 at the crank and I want to have a system that adds that safety margin and power and also shooting for any possible improvement in fuel economy as well in conjunction with dropping from a 3.46 to a 3.25 rear gear.
Who do I talk to about tanks? I am wanting to get two 4qt tanks with one setup as a surge tank with baffle and the other as the primary, just like Howerton uses in the twin tank system, just without the enclosure as I will be custom building an enclosure and a pump mount to suit my boot.
Thanks,
Dave Ellsworth
Now to go and put my name down for the group buy.
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