Eaton M62 Supercharger
- 3 lobes, twin rotor, 60 degree helical twist
- 3 lobes, twin rotor, 60 degree helical twist
- suitable for 2.5L to 4.0L passenger car and light trucks
-also suitable for other engine sizes, depending on total system performance requirements
-62cu.in. (1.02L) per revolution
-14,000 maximum continuous rpm, 15,000 maximum intermittent peak rpm
-Eaton M62 Supercharger is from 1991-1995 GM Series I L67 3.8L supercharged vehicles
-Buick Park Avenue, Buick Rivera, Olds 88, Olds 98, Pontiac Bonneville
-uses Fle-Pro MS95741 supercharger gasket
Eaton M62 Generation 2 1992-1993 Supercharger
-GM Series 1 L67 engine 3.8L
-2.55"(64.8mm) pulley
-205HP/240TQ
-Inlet diameter Early=59.5mm (Less desirable)
-Inlet diameter Late=71.75mm (2.825")
-discharge opening of M62=2,890sq.mm
-area of 62mm (2.44") hole=3,019sq.mm
Eaton M62 Generation 3 1994-1995 Supercharger
-Eaton M62 Supercharger is from 1991-1995 GM Series I L67 3.8L supercharged vehicles
-Buick Park Avenue, Buick Rivera, Olds 88, Olds 98, Pontiac Bonneville
-uses Fle-Pro MS95741 supercharger gasket
Eaton M62 Generation 2 1992-1993 Supercharger
-GM Series 1 L67 engine 3.8L
-2.55"(64.8mm) pulley
-205HP/240TQ
-Inlet diameter Early=59.5mm (Less desirable)
-Inlet diameter Late=71.75mm (2.825")
-discharge opening of M62=2,890sq.mm
-area of 62mm (2.44") hole=3,019sq.mm
Eaton M62 Generation 3 1994-1995 Supercharger
-GM Series 1 L67 engine 3.8L
-2.85"(72.4mm) pulley
-2.85"(72.4mm) pulley
-epoxy (not teflon) coated rotors for tighter internal clearances
-larger inlet diameter 71.75mm (2.825")
-225HP/260TQ (+20HP/+20TQ) vs. Gen 2
-larger EGR stovepipe
Eaton M90 Generation 3 1996-2003 Supercharger
-GM Series 2 L67 3.8L 8.5:1
-larger EGR stovepipe
Eaton M90 Generation 3 1996-2003 Supercharger
-GM Series 2 L67 3.8L 8.5:1
-3.8" pulley
-240HP/280TQ (+15HP/+20TQ) vs Gen 3 M62
-suitable for 3.0L to 5.0L
-discharge opening of M90=3,365sq.mm
-area of 65.5mm (2.58") hole=3,369sq.mm
-uses Fel-Pro MS95744 supercharger gasket
Eaton M62 vs. Eaton M90 Supercharger
-uses Fel-Pro MS95744 supercharger gasket
Eaton M62 vs. Eaton M90 Supercharger
-M62, smaller lighter rotors
-M62, gets into boost quicker
-M62 physically smaller and easier packaging
-M62 physically smaller and easier packaging
-M62 on 4.0L makes 5-6 pounds boost, stroker 4.6L 3-4 pounds boost
-M90, requires only couple more HP to drive it
-M90 can use smaller pulley and will make more boost (M62 is maxed out)
-M90 better for 'strokers' and custom installs requiring 10-20 pounds boost
-M90 or M62 with pulleys for 5-6 pounds boost, either will work well on the 4.0L
-Which is better? Neither, they both are good for the 4.0L
Used Superchargers
-used superchargers may require a new coupler, oil and front nose seals and possibly bearings, DIY rebuild kits on Ebay for $60
-because the rotors don't actually touch each other nor do they touch the case, they do not wear out. -Dirt ingestion may score the rotors and case
-always inspect the rotors for scoring and gouging, if seen, best to use a different supercharger
-most superchargers found in the JY are from wrecks which were most likely running well before the wreck
-most all used superchargers are not 'junk' waiting for a failure to happen as touted by others, even new superchargers are 'used' tomorrow
-at minimum, it is recommended to replace the coupler and new oil
Predicted HP/TQ = (1 + boost/16) x current Nat.Asp. HP or TQ
4psi=25%increase 6psi=37%increase 8psi=50%increase 10psi=65%increase 13psi=80%increase 16-17psi=100%increase
-M90, requires only couple more HP to drive it
-M90 can use smaller pulley and will make more boost (M62 is maxed out)
-M90 better for 'strokers' and custom installs requiring 10-20 pounds boost
-M90 or M62 with pulleys for 5-6 pounds boost, either will work well on the 4.0L
-Which is better? Neither, they both are good for the 4.0L
Used Superchargers
-used superchargers may require a new coupler, oil and front nose seals and possibly bearings, DIY rebuild kits on Ebay for $60
-because the rotors don't actually touch each other nor do they touch the case, they do not wear out. -Dirt ingestion may score the rotors and case
-always inspect the rotors for scoring and gouging, if seen, best to use a different supercharger
-most superchargers found in the JY are from wrecks which were most likely running well before the wreck
-most all used superchargers are not 'junk' waiting for a failure to happen as touted by others, even new superchargers are 'used' tomorrow
-at minimum, it is recommended to replace the coupler and new oil
Predicted HP/TQ = (1 + boost/16) x current Nat.Asp. HP or TQ
4psi=25%increase 6psi=37%increase 8psi=50%increase 10psi=65%increase 13psi=80%increase 16-17psi=100%increase
