Roots blower mounting suggestions

[Dust]

Friend has a Pontiac Grand Prix, with an L67, 3.8 V-6 with M90 roots blower. Here is the engine bay.



Choices
1. Add phenolic spacer after throttle body (maf is in throttle body)
2. Move MAF and tap intake pipe
3. Add phenolic spacer after blower (There would be a lot of extra space)

This is the W/A IC, and the outline is the SC.

Needless to say, number 1 is the easiest choice. But, from reading, it seems that the amount of fluid would need to be greatly increased. Stock injectors are 36.5 lbs per minutes, but some sites suggest up to double "normal" amounts due to having to cool not just the air, but the whole supercharger as well. Can anyone comment on increased flow needs?

[Richard L]

Are you concerning about water mist may damage the MAF? (#2)

[Dust]

It's a hotwire, so yes, I would think that in the least the accuracy would be shot.

[Richard L]

I think #3 is your most logical location.

In cold winter conditions, there is a danger if you spray before the engine/supercharger is warmed up, rotor tip may be damaged buy the frozen water. I don't believe the rotor bearing is sealed.

[Dust]

How would I get through the spacer, and guarantee that distribution is good?

[Richard L]

how thick is the spacer?

[Dust]

2-4 inches maybe?

[Richard L]

Bore two 1/2" holes with a 7.2mm hole in the last 4mm. Tap it of M8 x 0.75mm thread.

[Dust]

Thoughts on nozzle placement for distribution, or are those two what you are suggesting?

[Richard L]

Normally two is enough. The position of the bolts are not ideal. But you can try other positions. We can make wider spray angle jets at any delivery rate.