It has been talked about, few have tried it, and im going to give it my shot. Thats right trying to supercharge the stock 2.8.

Ive just bought the compressure housing from a turbo with wheel with backplate from a store locally owned by Pro-charger for $125(no tax )

I've had plans for a while now and think i can get it to work. I plan on making a mounting plate that will hang from the alternater bolts, and then tie in somewhere behind for support. Using an extra alternater pully(2") i will then run a 3.75" V-belt next to it and then drive a 1.25" pully that will be on the input shaft to the wheel. This will give me a 1:9 gearing up. Meaning a possible 45-50k RPM at red line with out belt slippage. I beleve the v-belt can handle these speeds, but if you have an idea shout out. May even use a very small surpentine belt for the multiplication. Drawing will be posted as i make them.

I'm just shooting for around 4-8psi for now, could always step up latter with a bigger housing and wheel. Do you think the block and fuel system can keep up?

btw using lathed .75" extruded aluminum as imput shafts, with radial ball bearings. If you got any other ideas on material that can be found easitly enough and bearings that can hadle the rpms better then tell pls.

 

ok got a bad rough idea made of the lay out of things. Its done in paint so nut much room for creativity there, hopefully i can get some measurements done at school and get it drawn in CAD.

 

I'm wary of the physics of a V belt on a pulley spinning at 50k rpm, but give it a shot if you're comfortable with it

 

I just toyed around with the impeller and the housing. I attacked a 550 R/C motor to the wheel and spun it at around 20k, and man does that thing make some noise and push some air, it sucked the housing off the ground

BTW its a small housing off of like a stock turbo off some car, a v-6 impretty sure. Im plsed to say that i think i can easily hit the 6psi mark with this thing.

Also any ideas on a cheap way to measure PSI or the correct way? Im goign to go search for it now but if you have any ideas pls feed.

 

With a small housing you may have some problems.. she may push nifty amounts of air at 20k, but in reality she'll make no measurable boost =\

 

Well its aoubt 8" across, and was off of possibly a tubored grand prix(dont know if he really knew). Ill be happy with 3-4lbs if i can get that, if anything it will help the motor breath better.

Tested it again tonight with my electric motor and with the wheel in the houseing, got some really strong air flow comming out the end.

For a testing purpose, would it work to cap off a pipe with the blower coected with like a vaulve stem attached, and then take a psi reading from there, with no outlet, it would eather stop pushing air in, or it would leak around the wheel. Depending if i did this and got data from it, do you think it would be crediable to how the engine may react?

 

I think it's a good idea dude. As for measuring boost...It really has to be done with the blower ON the motor. Remember that your motor is gonna be pulling in it's own air too. The blower must provide boost IN EXCESS, of intake vaccumn. Mount it up, pipe some PVC to the TB, and run the motor and meassure the boost on the PVC with a pressure tester and a schrader valve. It shouldn't be showing Vac at idle, just aboveslightly. Good luck!

 

Neat-O

You need to borrow a digi cam and get some pics up.


Matt

 

Wellnot much to see yet, besides what im working with in the ways of a houseing. I am going out to find bearings and pullies tomarrow or tuesday. Then i got to figure out how exactly im going to mount this thing on the alternater.

Do you think the alternater pully will slip when i take and rerout the belt away from it some?

Also jsut to say, what if i get good numbers on boost, where should i bee looking at getting some added fuel?

 

Well ive been slowed down for abit. I had gone to IBT today to find some high speed bearings, and they didnt carry aircraft quality ones any more. So i think im going to call around some, and i may just go to MSC and get some ratted at 20,000RPM and just over spin them, for testing, untill i find where i want the impeller to spin at.

I was talking to my AutoTech Teach today, and he as had some experiance with this turbo that i was using the housing off of. He said that at 50,000 i would probly be pushing more than i would want to, he figured around 30k was better for my application, well ill find out what i want to use to drive it, and see if i cant find some high speed bearings and update latter on.

 

You should yank some bearings out of a turbo assy. I don't really know if it's possible, but graban old turbo off a diesel at the junkyard and check it out. Another possibility are "sleeve type" bearings, sort of like main bearings on a motor. Whatever you end up using, you're gonna have to practically force oil to them, they are gonna make MASSIVE amounts of heat (especially at 30,ooo RPM). Anyhow jus some ideas, Keep Us up to Date !

 

Good news, Good news,

I spent 45min on the phone this moring talking to MSC and SKF and a few other companies that were not too polite. And I found some 12ID X 30OD X 10widthmm 38,000RMP radial ball bearings witch are on hold for me(untill i get a person with a credit card to call in, im only 17). These are a newer product that they just started carrying, and thus was not in my MSC catalog. So i found my bearings at $8.16ea and will be ordering them here some time soon, with in the week.

These arnt as fast as i would like, but i think the occational 40-42k spin wont damage them too fast, getting an extra set of 4 when i order them just in case i do spin them too fast.

Found a hardened steel tranny shaft at school, that my metals teacher would like to lathe down for me . It should be plunty strong to handle what i need with out fear of flexing or twisting.

Now ill need is some aluminum for the brackatry, witch i got a friend looking into for me, and should know by the lattest, next week where im goign to get my aluminum.

 

Well, i havent ordered the bearings yet, still working on bracket design, also the school donated some plate aluminum so im going to be working on the drawing some more first, then ill start cutting up the metal for brackets, and hopefully have the project redy to run buy x-mas.

 

KK, got my new surpitene belt to run the first pully of the super. Looking at pullies from MSC and belts, planing on using a 4L V-belt. Also found out that the bearings mentioned above are rated at 38,000 but are underrated by 1/3, so really 57,000 is possible on them. So im gearing for the 45,000 rpm when motor is at 5k.

Also got a little drawing done in autocad today, below is a screen shot of the super, hanging off of the alternater with crude brakets.

Also the grid is set to .5" if you want to get rough sizes, i know i need to rotate this counterclockwise, because the bolts im useing are rotated back some, so i still got changes to make, and compensate for the longer belt for a better grip on the pullies, and many other variables.

 

Have you made the brackets yet? I was also wondering, if you have figured out a contingency, if the belt decides to snap under load? I would think a bypass of some sort would be a VERY good idea...Suddenly robbing your car of airflow at high RPM will cause some probs. And compressors restrict airflow when they're not turning quite a bit. If you're going around a corner and it dies, powere steering will stop working (happened to me a few times, almost caused a wreck). having the bypass manually controlled might not be a bad Idea (although i'm not sure where you'd get the solenoid...I'll have to look into that...). I always thought it would be interesting to have the blower attached to a "clutch" like the ones on AC compressors. -Hit a button- Bypass goes from N/A to Supercharged, and simultaneously activates clutch....SWEET!

 

They dont run bypassers on the other Supercharged cars from what i see,so i dont planon that. I will however carry the orig belt with me in case the new one brakes, 30sec and a belt change can be done, and i can always rig up the air stuff for normal driving in about 5 min if i wish form how its layed out. Got to finish comming up with the drawings then the brakets will be finnished.

 

I know this idea has been proposed, but im serious on making it work. I have the resorces, i just need input from you guys. I know i havent thought of everything, so help from any one would be appreciated, just saying this cus only 3-4 replys have been made to this post, and the rest are by me.

So come on though out some input.

 

Honestly, I pray it does work (If it does, I'm next...). Where did you pick up the compressor??? I looked into Dowards turbo setup, problem with his is,....it's a turbo... They're harder to plumb in...that sort of deters me from wanting one... A super is way more feasible for me. I love his idea though, the only prob is tooooo much tuning work. Anyhow... Are you using MAF or MAP? If it's MAF, how are you gonna get the Air fuel right?A chip? good luk as always

 

Well i got the compressure off of Pro-Desile. Im sure you can find an old trubo in a junkyard, pull of the compressure housing, and sandblast it to clean it up. Only prob with the junk yard ones is that the impeller could be junk.

Im using the MAF, placing it before the super on the intake side, i hope the comp has enough capabilities to auto adjust, or ill have to look into a new chip. Ive been told that the stock fuel pump will suport 8psi, but the injectors need to be in top shape, or new ones need to be installed.

 

i would put the maf between the sc and the intake so that it measures the air going to the intake, not the air going to the sc. also, new chip would be a real good idea. you're going to want that to run a little richer than it does now. i would think you'd want a chip rather than just hoping it'll self adjust.

 

Yep, this is one project where having a MAF car can really help. It can handle lot of input and make the proper adjustments. Of course the air temp sensor should go in there too.

I like belt driven much better, the turbo is so messy. Unless until that mid to rear driven turbo works out. Even a gear drive would be fine with me. 50t Schwinn sprocket welded to the crank pulley to a 18t on the back of the blower housing.

 

LMAO @ the schwin Gumby!!!! I like the idea of belt drive, if it breaks, go pick one up at parts store... I have my doubts as to wheter the comp. will keep up. It definately can be tuned around though. If anything, you can set it to run with BLOCK LEARN values, and tune it that way (be pretty easy)...the only problem is crappier gas mileage BUT, you'd have to talk to the prom guys, and see if they can help...

 

OK how about a steel sprocket off an old cb1100 / use two of them and make a double roller. no breakage of any kind ever, direct response, no belt and I dare the turbo to try and freeze up.

Ever seen that HD on discovery channel with the big belt replaced with about 25 Schwinn chains in a row side by side. looked strong as heck though. The guy got his pant leg chewed off if I remember ride.

 

I could get shot for this but this video will keep the project moving. the swish of the turbo and lack of displacement is more then made up for on 17lbs of boost on pump gas.

Its not a RX7 by the way,

http://www.rx-7.net/video/NLRturbo.wmv

 

This, in my opinion, is a definite big no-no... our mass airflow sensors use something like a vibration-film measure air.. I don't think it would react near the same under pressure. If it were a hot-wire maf, hell yeah, blow through is definitely the best way to go.. but.. it's not hot-wire. I'm not going to use my engine as the guinea pig to see if our mafs will work under boost.. I don't think Doward is willing to either, since he set his up suck-through.. if you feel like being the guinea pig, Maxx, power to ya.

 

You are aware, of course, that the bike chain would probably explode at slightly above idle... they're not designed to go all that fast.. your legs ever managed 2k rpm? Mine usually ran 100-120 rpm on my cyclometer.. if I was going all out trying to get rpm, I don't recall ever beating 200 (I have a lopey cam installed in my legs, though.. they're torquey) ... you want it to withstand 5000? heh. no.

the motorcycle chain would withstand the stresses, but now the problem goes to the compressor.. bike motor sprocket + chain == serious weight.. bearings would likely fry well below their rated rpm

 

ok...i've never actually messed with mafs much, i didn't realize that pushing boost through them would be a bad thing. i just figured it'd read better. my bad!

 

a bike chain would never ever be strong enough. My brother has a mini-bike with a chainsaw motor on it, and the chain snaps about once a month, we even use the heavy duty kind for fat women on beach cruisers.

 

funny how in one post a few say not to use a maf and in another they talk about using the GN maf. You know them turbo 3.8s???

Its allways easier to bash then to use an open mind.
No one said you had to use stock parts.

 

Where do you get that we're bashing MAF/MAP, Gumby?!

I'm not even getting on the MAF vs MAP bandwagon. Both systems work. I'm just saying OUR mafs (stupid dinky vibration-film crap) probably don't work in a +psi environment. Find a way to replace it with a maf from just about ANY other gm vehicle (GN, TPI, LT1, LS1) (which all happen to be hot-wire) and you're fine for blow through. Ditch MAF for speed density with a 2 or 3 bar MAP, and you're good to go... or deal with it and place the maf on the atmospheric side of the system. Personally I'm happy to just put the existing MAF where it belongs...

 

KK no bashing, dang i take a two days off of this post and i get all of this

Ok ive read that placing the sensor on the filter side of the compresure is the best way, and not to make the MAF die(EXPLODE).

Using a V-belt apears to be the lowest weight of a driving system to use. I wouldnt mind using a small serpentine belt do drive it up to the 45krpm mark, but it adds alot of weight from the bulky pullies, unless i make them my self. I dont want to really make my own suerpentine pullies, i can make v-belt ones, and the belts are cheap and easy to find if they ware out fast or fly apart after a bit.

When i get back into class ill finish up the bracket, and get a diff view from up top on how ill drive this monster of a 7"housing lol.

 

Serpentine pulleys would be easy so long as you have access to a metal lathe and some cylindrical billet aluminum stock.. otherwise, yeah.. v-belt.

 

thats what i was thinking, about making the surp pullies, but im goign to try v and see if it slips

 

Set us up with some updates..... Got those brackets made yet???
How about the pulley assembly??? Anyhow, just wondering if you gave up or what...

 

Nope not givin up yet. Got to get access to a credit card so taht i can order my pullies and bearings. Got a simple layout done in CAD, but i need the pullies to finish it off. So when i get the rest of my parts i reply, or when i dicide that ive wated my time then i will also reply, untill then, be pacent i guess.3

Also conserned weather the MAF and car comp will beable to adjust to this, still researching on that part.

 

Name that engine and win a ride in the MaxxMitchell special.

If your gonna go big, go turbo.

 

All you need is a paypal account or a bank account. Both will give you a fake credit card. Deposit $20 at the local bank and get a visa MC debit carb. Takes about a week and you have a credit card wink wink. Just gotta have enough in the account to cover it.

You could steal gas though. Some reason gas stations only charge you $1 for a week or so. You could fill up a 1000 gallon truck with $1.50 on the card.

 

gumby, what kind of motor is that w/the twin turbo? pontiac or something? what's wrong with s/c? nhra runs blowers not turbos

 

Its a Buick 455 FI twin turbo green machine.

http://www.thedinosaurgang.com/greencar.htm

 

"Win a ride in the MaxxMitchell Special" ?!?!?!?!? lol like that would top any good 350 TPI T/A

 

don't know what that was about but how's the project comin? anything new goin on with it?

 

In a 3800lb car??? no comparison can even be made.

When you have a tank, with a motor the size of a small house. What else can you do but think out side the box. Most of what you see is home made like yours will be.

This project is outside the box. Most would question why not just drop that 350 TPI in there but out side the box is more fun.

Outrageous Engines

 

Thinking outside the box is a hell of alot more entertaining too! Not to mention the "unique" factor, how often do you see a homemade supercharger setup made from scratch, and on a V6 no less? Anyone can follow the "recipe" for power, but few people take the time to knock the hurdles over.

 

LOL nock hurdles over, i did that in gym class

Well no new info for a while like i said, got to get an order placed for bearings and other materials, and still looking at if the fuel dilivery will be enough to handle anyhting in the 5-8PSI range.