i remember a while back seeing a picture of a fiero with a 3800looking m90 supercharger mounted near the trunk wall on a 2.8 with a pipe coming from the SC to the throttle body, i was wondering if anyone has done anything like this, and if so, how hard was it to tune?

Is this the pic you are talking about?

looks pretty much like it, only i seen it from a different angle, that looks more like an m62 in that pic... any idea whos car that was, or how it was running?

I know nothing about the build, or how the car runs. The topic was covered here.

hrm, doesnt look like anyone ever finished one of these setups.

i have an m90 sititng around doing nothing, i bet it would run nice on the 2.8 with the right pully... and by looking at my car, it should fit about where the one in that pic is.

quote Originally posted by hookdonspeed: just got off the phone w/ the local performance shop/machinst, said it shouldnt be an issue mounting this m90 up somewhere and making the plate to goto the face of the charger to accept a tube to goto the TB

Anything is possible if you want to spend the $$$.

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3.4L S/C 87 GT www.fierosound.com
2002/2003/2004 World of Wheels Winner &
Multiple IASCA Stereo Award Winner
My SD4 Indy www.fiero.nl/forum/Forum2/HTML/096075.html

thats the fun in knowing a machinist who wants to keep the business of the store you manage, he gives u realy good hookups

he took a bit too long on the last few jobs we sent to him and asked what he could do to makeup for it... i asked him about the plate and brackets, he said send it up and we can workout a good deal :P

im just more worried about the ecu/fuel management then the charger setup itself....
anyone know how well darth does w/ supercharger boosted engines?

ill be taking the car down probly weds for him to look at making brackets, intake piping and a new exhaust.

Just my opinion, that probably is the wosrt spot you could ever come up with for a blower. It is practically on top of the exhaust manifold. When you add in the fact that boosted air is hot, then you heat the blower case as well, I see lots of problems getting it tuned. I'd imagine there will be lots of issues with detonation.

i was thinking about that, was going to put an aluminum plate over the manifold, and "modify" the alternator blower to cool that area... was also concidering removing my ac compressor and using that spot, as it doesnt work, and i was going to remove it anyway.

also doing the supercharger in that way, if space allows, i could bolt one of the intercoolers to the outlet then put the plate ontop of that.

There is an aftermarket supercharger that fits in the stock A/C compressor location. There is someone on the forum with one on their car.


That would be tons easier than modifying the m-series blowers to fit

FMICs on ebay are very cheap and work just as well as any spearco unit or like, or you could go with a big air to water

No need to use the usual IC setup for the m90 since you'll have a charge pipe

some earlier discussions about this topic:
https://www.fiero.nl/forum/Forum2/HTML/079126.html
https://www.fiero.nl/forum/A...060811-2-068952.html

m90 on 3.4 dohc discussion:
https://www.fiero.nl/forum/A...050818-2-061867.html

having an m90 already (gen 3 from a series 2 3800) (it didnt cost me anything, just needs a new nose seal, i seen the re-seal kits for like $40 somewhere, cant remember where, anyone know offhand where that is?) and having a machinist that will do some stuff for me dirt cheap, the fabing and the unit will probly cost me under 150 for everything... i also have a map sensor from an chevy typhoon, and i plan on doing the dis ecu swap before i do this install so i can add a knock sensor and have better timing control.

im wanting to pull about 8-10psi outa the supercharger, with a good tune i feel this should be a prettysafe amount of boost, my engine has 80k on it and still feels strong.

im realy looking at the AC compressor area to mount this, more room, and would probly be alot cooler, also would give me more room for a water-air intercooler if i wanted to.

So is the indy going to be at the world of wheels? If it is I will be making the trip from fort mcmurray.

quote Originally posted by RideZiLightning: And much more expensive. Centrifugal superchargers cost ALOT

I bought a used Vortech off eBay for $675 and built everything else. I've been running with it since 2003.
Some of you may have seen it at the 20th Anniversary Show (didn't come to the 25th).

My car did not have A/C, so I was able to mount the supercharger where it would have been.
http://fierosound.com/super...ger/supercharger.htm

[This message has been edited by fierosound (edited 01-11-2009).]

You can get a good m90 for $200 or even less sometimes

With that other $475 you can get a whole lotta stuff done

and he got his for free

For the price of your sc he very well might finish his whole setup, and possibly even cheaper

I for one will follow your build. I like the idea of doing something that has not been done - or at least not publically documented. And I wish you the best. However I think the hidden cost of fabricating and tuning for something that is new will quickly surpass what it would have cost for the centrifigal blower.

quote Originally posted by RideZiLightning: You can get a good m90 for $200 or even less sometimes With that other $475 you can get a whole lotta stuff done and he got his for free For the price of your sc he very well might finish his whole setup, and possibly even cheaper

All very true once he finishes the project. On PFF I've seen several S/C setups for the 2.8 "get started" and then we never hear from them again. I think most give up or decide to go turbo instead.

ill do an engine swap before i go turbo, ima do some mockups for space later this week after my suspentions done...

after doing a little bit of readon on the forum, i think before i go with the ecu swap, since the supercharger hopefully wont be in the way of much, im going to go with an 85 ECU and add a knock sensor.... with this setup, will i need the sparc control module from an older buick, or will i be able to just have the ecu programed for it?

anyone got the o.e. number on the 85 ecu's??
edit: never mind, got it.

[This message has been edited by hookdonspeed (edited 01-12-2009).]

quote Originally posted by hookdonspeed: ...I'm going to go with an 85 ECU and add a knock sensor.... with this setup, will i need the sparc control module from an older buick, or will i be able to just have the ecu programed for it? anyone got the o.e. number on the 85 ecu's??

I did this on my GT. I pulled all the information together here: https://www.fiero.nl/forum/A...050119-2-054278.html