The plan is 2.8 Supercharged.
The SC is a freshly rebuilt Eaton M-90.
I will be making a custom intake manifold to bolt up the SC. The intake manifold and the pulley system will not be a problem to make, I'm a Mechanical Engineering Student and have access to everything I could posibly need.

I'm not very knoledgeable when it comes to motors though...
I intend to run 6psi of boost.

I was told all I needed for that was a 2 bar MAP sensor and then have Dennis Lagrua burn an e-prom. Is that it for fuel?

Next issue is spark. I plan on using NGK UR5 plugs. The current ignition setup is as follows: MSD cap and rotor, Accell 8mm wires, MSD coil, Delco IGN module. All the ignition stuff is less than 2 months old. Will I have to make any changes there?

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[This message has been edited by fiero_silva (edited 12-15-2004).]

Surely hope you will be documenting this buildup?

Good luck.

Of course.. It won't be getting started for a month or so because I have very limited time right now, but I plan to have it done by spring...

You migh want to do some clearance checking- the M-90 supercharger may smack into the 2.8 distributor

Nope.. It fits fine...

now this is a cool idea!
the m90 is really too small for the 3800 to make serious boost, and the price on the blowers has come way down.
youve simply got to have more than 6 psi boost though. my 94 bonneville makes 10! 15 would be better to shoot for. for a guy that doesnt know much about engines, you shure picked out one particular plug early on in the game?
how are you going to reduce compression?
keep up the good work

I'm using a stock 2.8 with about 45000mi on it. That is the main reason I'm not going for tons of boost...Just 6psi as this car is still going to be a daily driver (well for the summer anyways)....

design custom intake runners, i'd start by cutting up a lower plenum and adapting it to the supercharger, and porting the runners, and heads i'd use the stock 3.8" pully, and maybe stock SC3800 injectors,
, tear down the motor and use dished pistons maybe, and go a step or colder on the plugs, i'd stay away from platinum

on a Stock SC3800, a 3.8" pully makes about7-8ish PSI, but you will have a smaller, motor, which could possibly be more restrictave, so it might end up reading more PSI,

on my GTP i run a 3.25 pully, and have headers no cat and 3"exhaust with Borla, and im only seeinf 10 PSI simply because im able to move more air, and there is NO restrictions
but if i were to have stock manifolds and even a high flow cat, and 2-1/4 or 2-1/2 exhaust, i'd probibly see more like 14 PSI just because of back pressure

are you planning on just finding a stock used Series I M90 from a bonnie?
on the GTP's the stock coil packs are prooven to handle like 450 WHP with no issues
i'd upgrade the FP, the walbro255 can be had for like $113, i have it and it works great,

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Rich AIM: ONE FAST 2M8:98 Black GTP 2 Dr
3.25 pulley,magnuson snout, 72mm TB, RAT PCM,
TOG Headers, Borla cat back, 3” to mufflers, No cat, 160 stat, Big brakes, Eibach's, KYB’s PRJ 10mm Wires, autolite 104’s, and more
white-- 86se V6 FOR SALE $1,500
Gold86se 355 SBC, 92 BMW 325i

[This message has been edited by $Rich$ (edited 12-15-2004).]

I've got an M-90 from a 93 3.8l ford.
The intake is already designed and partly built.

The intent of this project it to
A: Do it on a budjet
B: Add a bit of kick to a STOCK 2.8, I do not want to do any major engine work (dissasembly of the motor)

I am wondering if all the STOCK 2.8 needs to run 6psi is an E-prom, 2 bar map sensor and colder plugs??....

http://www.fierosound.com/supercharger/supercharger.htm

all fiero sound has is a custom burnt chip... and it appears to be working on his 3400 that he supercharged.

quote Originally posted by fiero_silva: I was told all I needed for that was a 2 bar MAP sensor and then have Dennis Lagrua burn an e-prom. Is that it for fuel? Next issue is spark. I plan on using NGK UR5 plugs. The current ignition setup is as follows: MSD cap and rotor, Accell 8mm wires, MSD coil, Delco IGN module. All the ignition stuff is less than 2 months old. Will I have to make any changes there?

the eprom is for fuel & timing. if you have an '85 ECM, you can also add knock sensor.

your ignition setup should be fine.

i would check into bigger injectors aswell, possibly stock 5.0 19lb ones, there a direct swap in the 2.8
they can be had for real cheep

Hey, we're in the same boat. I actually have the same supercharger you're using. I have the top plate machined so instead of 3.8, it now says 3.4. We've been playing with the idea of getting this charger on there, and it seems there is absolutely no way to get it on top. The pulley ends up in the engine grille area. As of right now, it seems like the best place for it would be down low. However, you have the stock exhaust and oil filter, etc on the front side, and you have the axles on the trunk side. You may be able to modify the trunk wall and custom mount it to the trunk side.

I think it would be neat to make something work like the stock middle intake, with the charger in the middle, and a top intake piece that fits over the charger.

I'll be interested in how you plan to mount it...

not sure about superchargers; since they are 'fixed' boost I am not sure if or what type of ignition timing control you might need.....

I have a set of (8) used 19 lb ford injectors I bought on ebay when I was going to go the 2.8 or 3.4 route; they are sitting on a shelf now....(along with QUITE a collection of other stuff )....... I am in Ottawa so no customs to deal with if you are interested email or PM me.

This will be interesting. What will be REALLY interesting is how long you can stay away from underdrive pulleys once you get a taste of what it will do!!
gp

Jncomutt, I know exactly where you are coming from with "It will not fit on top, ect ect"... I will be making a notched vent grill to clear the pulley. I plan to do exactly what you said. I am making a new upper intake manifold and the supercharger will be bolted UNDER the intake manifold.. that's right, inbetween the middle and upper manifolds.

Jncomutt, what had you planned on doing for pullies? the SC uses a sligtly wider belt that the fiero. Were you going to switch all the fiero's pullies to use a wider belt, or were you going to use a different pulley on the SC?

Fiero308, I'm going to try and find injectors locally first, but If I can't I'll drop you a PM.

One solution at this website: http://www.mobeck.com/mt/Wiggo%20Kvamtro.asp

quote Originally posted by fierosound: One solution at this website: http://www.mobeck.com/mt/Wiggo%20Kvamtro.asp

That's an M62, slightly smaller than an M90.. the M90 won't fit there

For pulley, as long the groves are lined up, there is no harm in leaving the inner groove empty. I would use up the outer grooves of the pulley as it will allow that last bit of room for the charger to be slid closer to the trans.

I looked at roots style superchargers before I decided on my setup. I discovered several things.

1 -There was only one SC made for the 2.8/3.1/3.4 engines, but it was for a carburetor or TBI sitting on top,
so the finished job would not fit under a decklid with cutting a hole in it.
2 - mounting a Eaton SC low on the engine (like a 3800) fills the entire space between the heads,
so there's no room for fuel rails or the injectors.
3 - To mount high enough to clear some type of fuel injection, you're back to problem #1

The Eaton SC draws from the end through a throttle body, and pushes out the bottom. I thought that replacing the TB with a side-draft Weber TBI would probably fit well. If that could be made to work, you'd fit everything under the hood and switching to a DIS system would eliminate interference from the distributor.

http://www.webercarburators.com/fuelinjection.htm

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Fiero Fiesta - July 24, 2005 - Calgary, Alberta <--- click this LINK

3.4L S/C 87 GT www.fierosound.com
2002/2003/2004 World of Wheels Winner &
Multiple IASCA Stereo Award Winner

[This message has been edited by fierosound (edited 12-19-2004).]