Great info, thanks!

 

Nice set up Eternal!

Direct port would offer more detonation suppressant primarily, wile a single before the TB would offer more cooling primarily. Allot of it has to do with atomization time/ability. A direct port relies purely on the nozzles ability to produce the right amount of atomization to be useful in the combustion chamber since it has very little time to atomize with the intake charge. More chance of washing the cylinders could result, so I'm not entirely sold on the idea of direct port for water/meth. Nitrous sure, its highly combustible and is in a more gastric form right out the bottle. I actually think for most set ups, a single before the TB is most effective and could be debated safer.

 

Have you seen the mist it sprays into the cylinder? Actually as in when you pull the system to check for clogs/test/etc and spray into a bucket.

Even my 550cc nozzle is such a fine mist...I'd "think" and will know soon enough that the smaller nozzles for a direct port would offer even a finer mist imo.

Cooling the intake charge, vs detonation suppression is one in the same imo. In the end thats the goal, most people are using it to run more boost so they don't need race gas. In that case, closer to the motor is ideal, instead of further away.

I'm convinced had I had an equal distribution into each cylinder, vs one nozzle, I'd still have my motor. You could clearly see that each runner got less and less and they went further away from the TB.

 

Btw, Ex, where did you get that distribution block?

 

Heres a link
http://www.coolingmist.com/detailmain.aspx?pid=4port

$33 + $20 for the 1/4th QCs or get your own.

You could probably find it cheaper else where but am too lazy

 

It is a very fine mist, but if you spray it into a bucket vs. spraying it into a runner that is 35-40mm wide is very different than into a 70mm pipe angled in the opposite flow of the intake stream. Having a longer time to completely atomize gives you something that you know is going to work. I won't discount that the 4 port system has the potential to have AWESOME yields, but it would require that you can actually see inside the port while air is flowing into each runner. But then again, this is what I see. I'm not an engineer or anything like that, but from the systems that I have seen on both Honda's and other cars running meth seem to show that positioning the nozzles correctly and having the right flow for the nozzle makes a huge difference.

 

Yes exactly, and from my perspective, you really have to get everything calibrated much more perfectly to inject strait into the cylinder. I also understand the potential for running the last cylinder leaner then the rest when injecting a single nozzle pre TB. This requires some forethought also. Pick your poison

 

Lotsa great info here... I must be getting old because I keep mis-reading the title. Every time I scan down the list o' FI threads, I wonder why there's an Official Watermelon Injection Thread. Then I start thinking about using syringes to inject vodka into watermelons... Anyway, never mind!

 

 

Well I'm not afraid to try to figure this out. Unless something comes along that drastically changes my mind, I'm going to give it 100%.

I trully think that w/the lowered compression, and direct injection, I can see 700whp+ on pump gas.

Of course I said this on the stock motor, but still feel it's do-able.

I'll make sure to post my results, again alot of good information, and ideas to consider.

Thanks everyone for contributing, keep the info coming.