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Old 02-22-2008, 02:05 AM   #1 (permalink)
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Power from Eaton M90
Hello!
I am new here and i have some questions about my supercharger M90.
Basically, i did some custom work on my car. I have 1991 Ford Probe with 3.0 V6 engine and i put supercharger M90 from T-bird.
I can see some 5-7 PSI of boost with the stock M90 pulley on. I just wondering, what can be done to make that SC to making more boost, more power?

What about porting?
Pulleys?
How much is the MAXIMUM power of M90?
Any info, i will be glad
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Old 02-22-2008, 04:30 AM   #2 (permalink)
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I belive my Roushcharger was an Eaton m90. I used the BBR pulley upgrade kit and made aroun 8-9psi. At that level however, heat became a huge issue and the blower lost efficiency. I really wouldnt push it any farther than 10psi unless you have cooling upgrades.
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Old 02-22-2008, 08:11 AM   #3 (permalink)
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they made about 12-14lbs stock on the SCs.
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Old 02-22-2008, 04:23 PM   #4 (permalink)
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You can find alot of info here .Here is what M90 at 20 + psi on v6 3.8 can do Link
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Old 02-24-2008, 05:59 PM   #5 (permalink)
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You can find alot of info here .Here is what M90 at 20 + psi on v6 3.8 can do Link
WOW!!! 20 PSI??? How?
What you have to do with your SC to get 20 psi? Okay, let's say not 20, maybe 12-15psi?
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Old 02-24-2008, 06:00 PM   #6 (permalink)
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I belive my Roushcharger was an Eaton m90. I used the BBR pulley upgrade kit and made aroun 8-9psi. At that level however, heat became a huge issue and the blower lost efficiency. I really wouldnt push it any farther than 10psi unless you have cooling upgrades.
what kind of cooling upgrades? Intercooler? I have it.
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Old 09-23-2008, 08:14 PM   #7 (permalink)
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The way to make a roots blower spin faster is the make the wheel that spins it smaller.

AKA smaller pulley
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Old 12-08-2008, 03:44 PM   #8 (permalink)
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Why do you have a blow off valve?
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Old 01-15-2009, 01:55 PM   #9 (permalink)
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Why do you have a blow off valve?
Because the M90 on T-Bird SCs has a vacuum activated bypass valve in the stock inlet and return plenums that elminates the need for one. He needs to relieve that pressure somehow.


My Thunderbird SC makes 17psi with a Generation 3 M90 (square inlet port). I hand ported it, put in GTP coated rotors and have a 10% overdrive pulley.
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Old 01-15-2009, 02:35 PM   #10 (permalink)
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you tell them big poppa. show em how the cow eat the cabbage.
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