From knowing nothing to having a Thunderbird supercharger on an m20b27i

[TheTacoMan]

I missed that somehow lol. Even then you may run into heatsoak after some driving.

[The Dark Side of Will]

AWICs are commonly used on high power supercharged cars and on turbo cars when packaging an AAIC is difficult (e.g. mid-engine cars). They work.

[Ether-D]

There will be a external heat exchanger, for the intercooler, mounted behind the kidneys that will have cooling fans running constantly. If it heatsoaks, I'll just have to get a bigger heat exchanger and bigger fans. But I will give methanol another look.

[The Dark Side of Will]

600+ RWHP Mustang Cobras use AWICs... You won't have a problem finding a big enough external heat exchanger.

I also think the HEX you have in the manifold will probably be big enough to max out the M90.

[Ether-D]

If I max out that M90, it's gonna be a MONSTER. I don't think I'll even try. That could be 15psi+ available all the time. Can you imagine the hp/tq curve?

[TheTacoMan]

Check this out
This is from an m90, you can see that even running 10psi raised the temperature a significant amount. If you plan to go to 15psi, meth is an option to lower intake temps lower.

[Ether-D]

Tacomang, that's a great bit of info!

Ok, I just did some math.

It would take a pulley ratio of 2.3:1 to get the m90 to absolutely max rpm on my m20. If I used that ratio, It would be making a theoretical 25psi. Now there's a ton to consider and such, but that's sort of close at least. Good god there's a lot of potential in this little m90.

[The Dark Side of Will]

IIRC, the GM 3800 V6 guys can touch 400 WHP with an M90, through a transverse automatic... but that's a COMPLETELY MAXED configuration... ported blower housing, manifold and heads, upgraded throttle, headers and full exhaust, BIG cam, intercooler & CAI and a LOT of dyno time. Flow is more important than boost... they're not running a lot of boost in that config, which helps with heat rejection.

You'll boil water on the blower housing if you try to run 25 psi.

ClubGP has a bunch of 3800 build info related to the capacity of the M90.

[Ether-D]

I have absolutely no desire to max it out. But you just never know.

[Ether-D]

Alright, here's the latest set of pics. One of the thunderbird TB and revised top brace.

[Ether-D]

and another...

[Ether-D]

Standing out in the shop just now, I realized that I'm going to have to move the PCV hose to the filter side of the TB to keep the crank case from acting like a giant vacuum reservoir when I release the throttle, causing problems with the brake booster vacuum and the bypass valve vacuum. When I was locating the source for the PCV hose earlier, I couldn't figure out why on the factory TB setup it was on the filter side. Now I know.

I don't think there will be any issue getting the MS2 to listen to the Ford TPS. Just a matter of calibration I think.

On the other hand, I think the Ford idle control is gonna be all screwy. So I'll probably just route around it into the gaping hole I previously made for the PCV hose. Lucky...

[The Dark Side of Will]

Here's a thread in which a guy does a from-scratch installation of an M90 on a 4.9 liter Cadillac V8 in a Fiero: http://www.fiero.nl/forum/Forum2/HTML/127611.html

[Ether-D]

I think me and that guy would get right along. Nice.

[The Dark Side of Will]

Standing out in the shop just now, I realized that I'm going to have to move the PCV hose to the filter side of the TB to keep the crank case from acting like a giant vacuum reservoir when I release the throttle, causing problems with the brake booster vacuum and the bypass valve vacuum. When I was locating the source for the PCV hose earlier, I couldn't figure out why on the factory TB setup it was on the filter side. Now I know.

Yep, that's the way PCV needs to work... one side to filtered air at atmospheric pressure, one side to manifold vacuum.

The atmospheric side of the PCV should be *AFTER* the MAF/AFM, however. That air goes through the crank case and ends up being burned in the engine, so it needs to be metered.