Separately, megafreakindeth, here is a Canadian site for a 2.8L Fiero supercharger kit: http://www.jimmysautomotiveandcustom.com ). Click on their "Accessories" tab, and then scroll down to the bottom of the page that next comes up.
Although obscured somewhat by their graphic's blurb, the "snail" at the upper right hand side of their picture sure looks like a centrifugal supercharger to me --- addressing the question raised in the title of this thread you've started, "anyone make a centrifugal supercharger for the 2.8/3.4?"
IMHO, I like the idea of a supercharged 2.8 or 3.4L (centrifugal or otherwise), but I don't care for the drawback of losing the car's air conditioning, which apparently is a typical limitation of these kits.
i was kinda hoping for a kit that used the long bar across the engine to put the pulley on the pulley side and the blower on the throttle side(vortec rsx kits). i certianly dont want to lose my ac, not that i have it installed now or that it worked before but one day i will have it. i have the truleo intake and exhaust so i dont want to lose those, nor do i want to lose the stock intake through the fender/aircan. not that any of these have to do with performance but more with packaging size and asthetics. i want a backup plan if my heads dont produce the power i need, as it stands i can just barely get some slip in the rear wheels with my stock suspension/tires while cornering but i have to floor it so much i lose my throttle control. if i can get a good slip angle with less throttle once im done with the heads then all ill need is some nos for the quarter. of course a good turbo/sc setup will do it all day long.
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09:03 PM
Mr.PBody Member
Posts: 3172 From: Cincinnati, Ohio, USA Registered: Oct 2006
There is a company that sells Fiero Fiberglass parts in canada (i think) that hasn't updated their site in a while but the sell the SD4 body kit, and a bunch of other parts. On thier text list of parts they list a supercharger and say its vortech.
Originally posted by megafreakindeth: i was kinda hoping for a kit that used the long bar across the engine to put the pulley on the pulley side and the blower on the throttle side(vortec rsx kits).
I'm not sure of the "long bar" you mention, but my guess is it isn't stock. The "strut tower brace" sold by The Fiero Store and others is essentially a long bar that supposedly "helps strengthen the chassis by tying the two rear strut towers together," but that particular long bar definitely isn't stock, so I doubt there would be a centrifugal supercharger kit that would use it.
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Originally posted by megafreakindeth: i certianly dont want to lose my ac....
I'll second that.
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Originally posted by megafreakindeth: i have the truleo intake and exhaust so i dont want to lose those, nor do i want to lose the stock intake through the fender/aircan. not that any of these have to do with performance but more with packaging size and asthetics.
Don't sell your existing combination short just yet; the Trueleo intake and exhaust are a good set-up for performance, and the Fiero's CAI (cold air induction) system is useful as well.
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Originally posted by megafreakindeth: if i can get a good slip angle with less throttle once im done with the heads then all ill need is some nos for the quarter. of course a good turbo/sc setup will do it all day long.
In regard to the question raised in the title of this thread you've started, "anyone make a centrifugal supercharger for the 2.8/3.4?" I don't think there's a centrifugal supercharger kit that allows you to do all of the things you've mentioned above. You'd probably come closer with the turbocharger kit from Design 1 Systems ( http://www.design1systems.com ). That positions the turbo on the driver's side of the car, and allows you to retain your AC, but I'm not sure if it also would allow you to retain the Fiero's stock CAI. (If need be, I suppose you always could just create one by repositioning the air filter between the driver's side rear fender and fenderwell.)
In any case, even if a centrifugal supercharger wouldn't work for what you want, a turbo plumbed into your Trueleo intake and exhaust, combined with the cylinder head work you've mentioned, should still make for one f-u-n ride!
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11:15 PM
Dec 15th, 2007
fieroguru Member
Posts: 12482 From: Champaign, IL Registered: Aug 2003
Why not move the battery to the front and mount the charger where the battery was? It would require a couple of idler pulleys and a double sided ribbed belt to make the charger rotate the right direction, but it should fit and allow the retention of the A/C.
I'm a supercharger fan, but, in reading your thread it seems to me that you are probably better off with a turbocharger. If you have the Trueleo stuff already, it can be plumbed up pretty easily for the turbo. I'd ask FrancisT about turbo'ing his application. Just a thought
The 'long bar' he's talking about is an extension shaft between the pulley and supercharger not a strut tower brace. Pontiac supercharged a few of the Grand Am GT's this way if I remember correctly. The idea is the supercharger is mounted on the drivers side of the engine bay and an extension shaft was run across the engine allowing the SC pulley to be driven off the accessory belts. It would make that area of the engine bay a little crowded but you wouldn't lose your a/c.
The 'long bar' he's talking about is an extension shaft between the pulley and supercharger not a strut tower brace. Pontiac supercharged a few of the Grand Am GT's this way if I remember correctly. The idea is the supercharger is mounted on the drivers side of the engine bay and an extension shaft was run across the engine allowing the SC pulley to be driven off the accessory belts. It would make that area of the engine bay a little crowded but you wouldn't lose your a/c. Gary
Thanks for that clarification, Gary, as I was a bit puzzled by mega's "long bar" comment.
Unfortunately, I don't think there is a centrifugal supercharger kit for the 2.8L/3.4L Fiero that employs that device.
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10:54 AM
sardonyx247 Member
Posts: 5032 From: Nevada, USA Registered: Jun 2003
i was kinda hoping for a kit that used the long bar across the engine to put the pulley on the pulley side and the blower on the throttle side(vortec rsx kits).
A driveshaft connects drives S/C from a pully at the front end of the engine, with the S/C mounted at the tranny end closer to the throttle body. A setup like this would be nice, but nobody has one for the Fiero engines.
------------------ 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 12-15-2007).]
A driveshaft connects drives S/C from a pully at the front end of the engine, with the S/C mounted at the tranny end closer to the throttle body. A setup like this would be nice, but nobody has one for the Fiero engines.
Someone has done this before on a Fiero. I have an old late '80s car mag that shows a '86 V6 SE that has an centrifical charger mounted on the Driver's side about where the cruise control components are mounted. A shaft ran accross the rear valve cover and drove a pulley the was mounted above the alternator. It looked like a really slick set-up and I'd always hoped that someone would make a kit like that to SC a Fiero. I too would love to SC a Fiero but I bought a turbo because I don't want to lose my AC.
sorry for the confusion, on the shaft thing. ive seen it on most of the honda kits, im guessing because the space around the pulleys is too cramped to stuff another accessory. i dont want to get rid of what i ahve because i do like it and it runs just fine now. the turbo will be a problem with the headers because the forward header conencts to the ypipe past the slave cyl and the rear header makes a bend and conects up near where the ign coil was. it would be a gross series of bends to get it to fit next to the throttle body where theres the most real estate. i was kinda hoping to use the drive shaft(the bar) so the sc could sit next to the tb, blow into the tb, and suck through the aircan. that way it would retain everything but the stock belt and the rubber intake hose. o well.
another issue i thought of this morning, what happens when the positive pressure goes down into the forward valve cover into the engine? boost leak? dry rockers? theres no check valve on that cover since im guessing it uses the throttle body as one(vs the rear cover which is attached tot he rear of the manifold and uses one).
Would that supercharger kit require one to forego the stock Fiero air conditioning?
Unfortunatly the factory A/C system has to go.... but you can look at it this way, you remove something that takes power awayand add something in it's place that will boot your power...hehe
Joe
------------------ Street Legal Tuning.
Specializing in Fiero performance: 3800 swaps, custom Aluminum flywheels, Brakes, Engine's, Aftermarket Bolt on performance parts, used Fiero parts,
Unfortunatly the factory A/C system has to go.... but you can look at it this way, you remove something that takes power awayand add something in it's place that will boot your power...hehe
Joe
Thanks, Joe, for answering my question. I imagine some won't care that the supercharger kit requires one to forego air conditioning. However, for those that would, far better for them to find that out now --- before the purchase of the supercharger kit --- rather than afterward.
i drove with my friend in his mustang with one of these, the powerband is actualy pretty neat. its not like a turbo with a surge in power, or like a roots blower with constnat power. it doesnt do much till about 4-4500 and then, where the motor begins to fall off because its na it just keeps going and going and going and going. just what im looking for.
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08:06 PM
PFF
System Bot
fierosound Member
Posts: 15232 From: Calgary, Canada Registered: Nov 1999
..it doesnt do much till about 4-4500 and then, where the motor begins to fall off because its na it just keeps going and going and going and going. just what im looking for.
Depends on the setup and maximum boost you are trying to achieve. We know the V6 intake system falls on it's face above 4000 rpm, and that's what I wanted to "fix" with the supercharger in place. I see boost on the gauge at 2000 rpm and it climbs fast to redline at 6000 rpm with the engine pulling hard all the way. The characteristics of the supercharger, the pulley diameter etc. come into play on where your boost starts. I'm running an 800 cfm Vortech to about 8lbs.
Granted, with a turbo setup, you could have ALL your boost in by 2500 rpm with the excess pressure blown off through the wastegate. Sizing is key here too - while a turbo with small impeller spools up fast, it can also become a restriction to larger exhaust flow volumes at higher rpms. In race car setups, turbos are sized so maximum boost is at the high end of the engine rpm band where the engine will be spending most of it's time during the race, in order to maintain maximum exhaust flow at the same time.
[This message has been edited by fierosound (edited 12-19-2007).]
