Eaton M122 blow through?
#1196326
03/13/12 12:57 PM
03/13/12 12:57 PM
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Joined: Jan 2008
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Canada
WO23Coronet
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I've been kicking aroud the idea of using an Eaton M122 supercharger (used on the new Shelby Mustangs) for a blow through carb application, has anyone done it? I see them as almost new take offs on EBay for the $600 mark (which seems pretty cheap to me). Plus they seems to make pretty decent power. I've stumbled across some guys on the net useing them for blow through EFI apps (5.0 Mustangs) but no carbs. I'm thinking there shouldn't be any issues since turbo and centrifigal blower guys do it all the time. The only thing that's bothering me is that the M122 is a roots blower so it builds boost right now, unlike a turbo or centrifigal that is more gradual, would that cause any type of issue?
I would be putting this on a stock smog 400 with low boost (6-8 lbs) but cranking itup when the motor gets a rebuild with forged stuff, I would also be using an intercooler. Converting to fuel injecte would be a possibility somewhere in the distant future. The car is a 67 Coronet and I was thinking of mounting it on the passenger side of the engine for better weight distribution.
I know that it would take alot of fab work but that's no issue, I've got a decent mig, plus a mini mill, mini lathe, etc (machinist by trade), so that doesn't scare me or turn me off of the idea.
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Re: Eaton M122 blow through?
[Re: WO23Coronet]
#1196327
03/13/12 01:16 PM
03/13/12 01:16 PM
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Joined: Aug 2003
Posts: 43,126
Bend,OR USA
Cab_Burge
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Posts: 43,126
Bend,OR USA
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Quote:
I've been kicking aroud the idea of using an Eaton M122 supercharger (used on the new Shelby Mustangs) for a blow through carb application, has anyone done it? I see them as almost new take offs on EBay for the $600 mark (which seems pretty cheap to me). Plus they seems to make pretty decent power. I've stumbled across some guys on the net useing them for blow through EFI apps (5.0 Mustangs) but no carbs. I'm thinking there shouldn't be any issues since turbo and centrifigal blower guys do it all the time. The only thing that's bothering me is that the M122 is a roots blower so it builds boost right now, unlike a turbo or centrifigal that is more gradual, would that cause any type of issue?
I would be putting this on a stock smog 400 with low boost (6-8 lbs) but cranking itup when the motor gets a rebuild with forged stuff, I would also be using an intercooler. Converting to fuel injecte would be a possibility somewhere in the distant future. The car is a 67 Coronet and I was thinking of mounting it on the passenger side of the engine for better weight distribution.
I know that it would take alot of fab work but that's no issue, I've got a decent mig, plus a mini mill, mini lathe, etc (machinist by trade), so that doesn't scare me or turn me off of the idea.
Why not mount it above straight above the motor and make it suck through the carb  ? Like a real roots blower  
Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
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Re: Eaton M122 blow through?
[Re: Cab_Burge]
#1196330
03/13/12 01:41 PM
03/13/12 01:41 PM
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Joined: Jan 2008
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Canada
WO23Coronet
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Quote:
Quote:
I've been kicking aroud the idea of using an Eaton M122 supercharger (used on the new Shelby Mustangs) for a blow through carb application, has anyone done it? I see them as almost new take offs on EBay for the $600 mark (which seems pretty cheap to me). Plus they seems to make pretty decent power. I've stumbled across some guys on the net useing them for blow through EFI apps (5.0 Mustangs) but no carbs. I'm thinking there shouldn't be any issues since turbo and centrifigal blower guys do it all the time. The only thing that's bothering me is that the M122 is a roots blower so it builds boost right now, unlike a turbo or centrifigal that is more gradual, would that cause any type of issue?
I would be putting this on a stock smog 400 with low boost (6-8 lbs) but cranking itup when the motor gets a rebuild with forged stuff, I would also be using an intercooler. Converting to fuel injecte would be a possibility somewhere in the distant future. The car is a 67 Coronet and I was thinking of mounting it on the passenger side of the engine for better weight distribution.
I know that it would take alot of fab work but that's no issue, I've got a decent mig, plus a mini mill, mini lathe, etc (machinist by trade), so that doesn't scare me or turn me off of the idea.
Why not mount it above straight above the motor and make it suck through the carb ? Like a real roots blower
That was the original plan, BUT, Eaton doesn't recommend putting fuel through their blowers (the gas corrupts the seals and it would eat the bearings) plus others claim that they're prone to exploding if fuel is put through them (don't know if that's true or not, it's just what some claim). Also things would get pretty tall if you intercooled it in a conventional draw through. The M122 also has a bypass valve in them for vacum conditions so they don't heat up and it makes them draw like 3 hp in non boost conditions for better fuel mileage (not a big concern but still a selling point in the big picture), and I don't think the bypass would work to well in a draw through application. It's basically a small butterfly valve (think small one barrel carb size) that is pulled open by vacum and bypasses the rotors). A guy tried not using the bypass on a blow through 5 litre (fuel injected)with a M112 and the blower got really hot.
MrYuck, I've also been looking at the centrifigal's and that's not out of the picture, but I'm drawn to the M122 more at this point, they seem able to put out some good horsepower stock, and more if you get them ported (they're some seriously fast Shelby's running the stock blower). Plus if anything goes wrong with it, parts are plentiful and cheap, not sure if that's true with the older used centrifigal's.
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Re: Eaton M122 blow through?
[Re: Mr.Yuck]
#1196333
03/13/12 04:58 PM
03/13/12 04:58 PM
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Canada
WO23Coronet
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not sure how you'd make that work as a pusher. You'd be better off snaging a 471 for a SBC/BBC and going that route. Might be easier to get 2 3.8L superchargers,, mount one on either side and run then thru a big holley or something. I think that unit is going to be too big to hang off the side of the block.
Guys have remote mounted them for blow through apps, like this one in a Fox mustang http://www.youtube.com/watch?v=ZuteL0qLMb0. It would be snug but if it can be done in a Fox, it should fit in a B body Dodge. Not saying it won't tough and take some finangling but I think it could be done.
As far as HP potential, Shelby's make an easy 600+HP with a pulley change, and guys have cranked them up to the 800 HP range. They can be ported (I think it's a guy buy the name of Stiegmeier) to get to the 800 range easier so there isn't so much heat build up. So I think it would work pretty well on a 440 and since it's a Roots (boost right now) it would make insane torque.
There has also been guys that mount the M112 Eaton (off of the Terminator 4.6 Supercharged engines used in then 04-04Cobras and the 5.4 Ford Lightnings) remotely and gotten good results. Even the M112 would be pretty sweet for the 600 HP mark it seems.
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Re: Eaton M122 blow through?
[Re: Jerry]
#1196334
03/13/12 05:04 PM
03/13/12 05:04 PM
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WO23Coronet
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i can't find any specs on the supercharger. does anyone know how large of engine you can put this on? i've got a 440 that i'd really love to supercharge.
As far as specs, the 122 in M122 stands for 122 cu in I believe (or 2 litres for my metric friends). As far as compressor maps and dimensions, I think the Eaton website should have that, I haven't checked yet but I will and check back with any info I have.
I think it would work on a 440 if you weren't looking for something insane. I think it would work in the 600-800 HP range. And really, that much HP in a street car is a handfull, and in a good chassis, would handle any of the "I got 1000 hp" dyno queen set who may very well have a 1000 hp, but just spin the tires and go nowhere.
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Re: Eaton M122 blow through?
[Re: Mr.Yuck]
#1196336
03/13/12 05:26 PM
03/13/12 05:26 PM
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it's not going to be close to 600 on a stock smog 400, mine was a 0303 over 70 440 w/ speed pro cast pistons (maybe 9:1) stock but super clean and new 906 heads, 488 summit cam, RPM intake 750 Proform Holley, headers, 175K stall and 3.91's. It ran 12.0's at 114.5. (5.5-6psi of boost) That's about 450ish at the rear wheels. to get it up to 600 you'll need a 500hp 400.
Yea I know I won't be at 600 HP with 6 psi, I was just stating what the potential HP these superchargers can produce. 450 hp at the crank to start with would be nice though and I don't think I'm out of touch shooting for that with a 400. The quick build I have in my head is similar to your 440. Summit cam, mildly ported 452's w/2.14/1.81 valves, and an M1 single plane. I would keep the stock short block as the motor is in fantastic shape, but I think it would handle mild boost as long as you stay out of detonation (I've read a bunch of your posts on your 67(you sold it right?) and you state that as long as you stayed out of detonation, it was fine). That is why I would like to intercool it as well, and add a meth injection kit along with it, cooler the better.
I would crank it up to higher HP levels in the future when I could financially swing building a better short block (forged crank, H beams, forged pistons, girdle, etc, or maybe even a low deck Koleno block) but the stock smog 400 would have to do for awhile
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Re: Eaton M122 blow through?
[Re: WO23Coronet]
#1196337
03/13/12 06:50 PM
03/13/12 06:50 PM
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Joined: Jan 2005
Posts: 3,635
Oakland, MI
dizuster
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For all the fab work it would take why not just put the el'cheapo Borg Warner S475 turbo on it everyone is using and be done. They are ~$700 or so new if you look around, and will make 1000hp set on kill. You'll need a blow through carb, carb hat, blow off valve, good fuel system, and fabrication work either way... Blower and turbo are almost a wash in price, so what's left, the waste gate and a boost controller? My iron headed 9:1, 360" with a .500" hydraulic cam,No intercooler, E85 blow through carb. It made 470hp at the tire on 12~13psi. No joke, it made peak HP at 5400rpm and that was with almost 20% converter slip. My bet is this thing makes an honest 600hp at the crank right now, and will make more with the boost turned up... The proof will be in the pudding when it goes to the track. Just tying up loose ends now. But I drove it home from the dyno at 11psi, and it absolutely rocks. With 26" x 10.5" ET Streets it will absolutely obliterate the tires from a 40~50mph roll in 2nd gear. http://www.youtube.com/watch?v=GJSSX6hqo6M
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Re: Eaton M122 blow through?
[Re: WO23Coronet]
#1196339
03/13/12 08:48 PM
03/13/12 08:48 PM
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Joined: Jan 2003
Posts: 24,562
Brookeville, Md
Mr.Yuck
Not enough dumb comments...yet
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Not enough dumb comments...yet
Joined: Jan 2003
Posts: 24,562
Brookeville, Md
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Quote:
Quote:
it's not going to be close to 600 on a stock smog 400, mine was a 0303 over 70 440 w/ speed pro cast pistons (maybe 9:1) stock but super clean and new 906 heads, 488 summit cam, RPM intake 750 Proform Holley, headers, 175K stall and 3.91's. It ran 12.0's at 114.5. (5.5-6psi of boost) That's about 450ish at the rear wheels. to get it up to 600 you'll need a 500hp 400.
Yea I know I won't be at 600 HP with 6 psi, I was just stating what the potential HP these superchargers can produce. 450 hp at the crank to start with would be nice though and I don't think I'm out of touch shooting for that with a 400. The quick build I have in my head is similar to your 440. Summit cam, mildly ported 452's w/2.14/1.81 valves, and an M1 single plane. I would keep the stock short block as the motor is in fantastic shape, but I think it would handle mild boost as long as you stay out of detonation (I've read a bunch of your posts on your 67(you sold it right?) and you state that as long as you stayed out of detonation, it was fine). That is why I would like to intercool it as well, and add a meth injection kit along with it, cooler the better.
I would crank it up to higher HP levels in the future when I could financially swing building a better short block (forged crank, H beams, forged pistons, girdle, etc, or maybe even a low deck Koleno block) but the stock smog 400 would have to do for awhile
Yeah that car is gone. As long as you keep fuel in the cylinders your are good. 6psi of boost shouldn't require any "coolng" If you want to save some cash get a Meth/water injection kit. buying something "cheap" doesn't always end up being cheap. I bought my Paxton set up for a BBC. I refabbed the main bracket and had the crank pully drilled for BBM. I had maybe $2200 in everything, carb, gauges, fuel system, carb hat, pipe work...
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