[DigitallyPhoenix]

Ok i have finished looking thru a bunch of m90 pictures and port designs. I know some say that opening the outlet too much will decrease efficiency. IE the Lightning style outlet. if you look at the picture i attached, i think the design of the elongated outlet would actually be good and here is why. on both the stock and ported blowers on the right of the pic, you can see the raw casting where the rotors never touch the case. when air is pushed in this area, it has to find its way forward toward the main outlet. in the lightning outlet, this air can escape much easier. Another design idea for the outlet is to extend the outlet triangle to just before the point where the rotors are at their lowest. the idea behind this is that once the rotors begin turning upward instead of downwards or inwards, they are fighting against their own rotation. i feel this is the reason for the "silencer ports" as the rotors approach almost their lowest position in this area. the main outlet is where the rest of the rotor reaches its lowest point... well short of it...

I have a spare M90 from a 97 car i will practice on. but i feel my reasoning is sound. OK so thoughts and input please...
 combin.JPG (92.2K)
Number of downloads: 23
 1-_15_-08_053.JPG (96.34K)
Number of downloads: 24

This post has been edited by DigitallyPhoenix: 07 January 2012 - 10:35 AM

[Buck531]

I'm sure you saw my post on the other forum a while ago. I'd go with this and leave it at that.

http://s283.photobuc...rent=outlet.jpg

WTF it says I can't use a JPG as an extension on this board?

Quote

You are not allowed to use that image extension on this board.

gay

This post has been edited by Buck531: 10 January 2012 - 01:17 AM

[MonteCarlo]

DigitallyPhoenix, on 07 January 2012 - 09:33 AM, said:

Ok i have finished looking thru a bunch of m90 pictures and port designs. I know some say that opening the outlet too much will decrease efficiency. IE the Lightning style outlet. if you look at the picture i attached, i think the design of the elongated outlet would actually be good and here is why. on both the stock and ported blowers on the right of the pic, you can see the raw casting where the rotors never touch the case. when air is pushed in this area, it has to find its way forward toward the main outlet. in the lightning outlet, this air can escape much easier. Another design idea for the outlet is to extend the outlet triangle to just before the point where the rotors are at their lowest. the idea behind this is that once the rotors begin turning upward instead of downwards or inwards, they are fighting against their own rotation. i feel this is the reason for the "silencer ports" as the rotors approach almost their lowest position in this area. the main outlet is where the rest of the rotor reaches its lowest point... well short of it...

I have a spare M90 from a 97 car i will practice on. but i feel my reasoning is sound. OK so thoughts and input please...
combin.JPG
1-_15_-08_053.JPG

i would have to agree about the outlet, but you would think that someone has to have tried it by now, i'm thinking about doing it on my gen3 when i get my gen5 so if i screw it up it's no big deal.

you also have to realize that gm did many things to limit this motor so as not to create another grand national situation, Ford's Special Vehicle Team knows what they're doing, and they wanted power from their blower, so they did what they could to optimize their blower, but they also intercooled it, maybe they thought the loss in blower effieciency would be offset by the intercooler having more even flow through it, either way i want to know how it works out