Where to put nozzles on intake manifold, even distribution?

[Mathrips]

I have a 99 miata 1.8l with 9.1-1 compression, with an MP62 supercharger from BRPerformance mounted on the intake side of the engine. The supercharger bolts to a box 2" deep that has runners coming out the side of it. Like a shallow shoebox with the runners coming out the side and the supercharger mounted on top, at one end, parallel to the box. So far it would seem the Aquamist 2d is the system for me as it monitors clogged nozzles and I want that. I am currently running 9-10psi with no wi or intercooling. It has been a cold wet winter since I installed this supercharger. I would like to move up to 14-16psi. I only have 91 octane here in California.

I am not sure where to locate my nozzle/nozzles.

A) If I locate anywhere in the box I question the even distribution as the runners exit the side.
B) If I put a single nozzle on each runner it seems that I would have very small nozzles and risk clogging.
C) If I mount a nozzle on each runner how would I monitor clogging?
D) If I mount a nozzle before the supercharger others have found that the supercharger gets cooled and the intake air shows little cooling. There is also the question of the effect of wi on the rotor coatings.
E) I have the ability to monitor egts but moving the nozzles around again and again trying to get egts to even out and to be equal at different levels of boost is not something I want to spend lots of time on.


Any suggestions?

PS I tried to upload a pic of the manifold but it simply lists the url and doesn't post the pic???

[Richard L]

Ideally., put the nozzle near the exit of the supercharger.

http://www.aquamist.co.uk/rescr/gallery/mazda/mx5-uk/eng-top.JPG

more links:

http://www.aquamist.co.uk/rescr/rescr.html

Richard

[Mathrips]

The pic you have is of a Jackson Racing super charger mounted on the exhaust side of the motor with a crossover tube to the stock intake. Imagine the next size bigger supercharger mounted right on top of the plenum box of a custom intake. I think from reading about every post here that I will just have to sort this out on my own by trial and error with the egts. Except the guy running a spacer between his supercharger and his motor I don't see any similar setups except those running pre supercharger

see pic below

[Richard L]

http://www.aquamist.co.uk/forum/coldside.jpg

[Mathrips]

Show off!
So how come I can't seem to do that?

Thanks
My supercharger bolts to the top of this manifold. If I put my nozzle in here somewhere I am unsure of even distribution. Perhaps between the runners of 1/2 and 3/4.

[Richard L]

I wasn't able to do it via the original link so I downloaded the image and save it to our server and it worked. It took me a good
30 minutes to realised that.

Do you have a picture of assembled cluster with supercharger? If you email me the picture I will post it on the same location.
richard@aquamist.co.uk

Richard.

What about this arrangement? possibility? shaded area is the exit of the supercharger.

http://www.aquamist.co.uk/forum/coldside2.jpg

[Mathrips]

Thanks for the info on pics.
I am with you on the shaded area dots. It is only going to make 225whp max so I am worried the individual runners is best but nozzles will be tiny and clog. Orange dots seem better for using bigger nozzles but I don't know if the flow to the first or last runner will be even. Maybe make a plexiglass cover and blow smoke through it. Just hoping for a simpler obvious solution.
I will take pic of the rest of the housing. Blower is off getting ported.
Thanks for your help.
Kingdon

[Slump]

I had a single nozzle pointing into the supercharger outlet on my M45 coldside kit, and I don't believe that I had even distribution.

Based on staining from the dye in the blue windshield washer fluid, most of the water went into #1 and #2 cylinders, and there was no evidence of any water going into #4.

I would not recommend a single nozzle, post blower, in a coldside.

Perhaps two nozzles, one centered between #1 and #2, and a 2nd biased slightly toward #4 might be safe, but if I were to do it again, I'd go with individual port water injection.

Here's my manifold "cover plate" which goes on the bottom of the M45 coldside, not on the top, like the M62. The water injection hole is the single hole near the top:

http://cobweb.ibsys.com/~smith/miataweb/photo054.jpg

You can get sense of how it looks installed here:

http://cobweb.ibsys.com/~smith/miataweb/photo070.jpg

[Mathrips]

I am in agreement with you Slump. I think it is going to take some thought to come up with a location post blower that gets equal distribution on the coldside. I noticed your posts on the other forum. Personally I think a total redesign of the manifold to direct all the blower air at the nozzle but that is not a project I am looking forward to. Currently my motor is dead again and about to come out so nozzles are low on my list. Once it is back up and running my mind and time will be more clear and I will address the post blower w/i desires some more.
Thanks for the input.

[Slump]

I wish there was a placement for the nozzles in a port injection configuration that would let them be easily accessable. Then, worries of clogging could be taken care of with regular checking and cleaning.

But, with those manifolds, there's just no way to do it easily.

But, a nice progressive, programmable controller would let you run 4 .5mm (or even larger) nozzles, just don't run them at 100% duty cycle.