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05:35:32 - 04/26/2024
Dakota Performance
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Fed
GenII
 
6/08/2006
23:32:09
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 Subject: March Performance pulleys?
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what do you guys think of these from summitracing.com?
part number is MCH-10510 or MCH-10515
worth the $200
¿
'93 Dakota CC 3.9 auto
(4.10 gears, LSD, exhaust, FIPK, lowered, rear anti-sway bar)
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The Purple1
DakotaEnthusiast
6/09/2006
01:08:16
|  RE: March Performance pulleys?
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Message:
Hi Fed!
I have recently purchased a set of the MCH-10515 "power & amp" pulleys. I also have the power steering pulley (stock size but billet) and one of their universal idler pulleys.
The 10515 ONLY steps to a 6-rib belt; this should allow for a wider selection of belt lengths! Yay!
Since I have a '99, I elected to bite the bullet and swap to a water pump with a bolt-on pulley-- not so long ago I said I would not do this :-) so that I could use ALL the pulleys.
I'll clear up some possible misconceptions: the alternator pulley supplied is SAME SIZE as stock, so no charging issues should result. If anything; since the alternator is driven off the (now) smaller crank pulley, it may spin faster? The crank and water pump pulleys are where the changes are. The water pump pulley is roughly the same size as the O.E.M. crank pulley! And the crank pulley is roughly the size of the O.E.M. water pump pulley!
It seems that the extra power to be gained (we shall see...) is achieved mainly by "underdriving" the water pump? Some schools of thought (Moroso, for example) say this is a good thing; reducing cavitation and improving heat transfer to the coolant. BTW: when I get this sorted out, I will be changing to Evans Waterless Coolant. Check their site and product:
www.evanscooling.com
I think they are worth the clams for the looks alone; you can even use one of their covers on the alternator pulley (but it is extra)!
I'll definitely keep y'all posted... :-)
Extreme Velocity Intake, 52 MM Holley Billet, Ported, Hughes Plenum Plate, Perma Cool Fan, Jacobs Pro Street, Moroso Ultra 40, Bosch 4, Superchips, CPS, IAT Mods, Dynomax Ultra Flo, Transgo, SLT Trim, Diamond Heads & Corners, Clear Tails, Hood Pins, APC White Gauge, PML Polished Trans & Diff Covers...
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crow318
Dodge Dakota
JOIN HERE
6/09/2006
09:35:50
|  RE: March Performance pulleys?
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If the crank pully is smaller and the alternater pully is stock size, it will spin slower. Because most people do not spend alot of time at idle, this is usually not a problem. If you have alot of electrical accessories and/or idle alot, you may need to get an alternater smaller alternater pully so that is spins at stock speed. To figure what size alternator pully you would need take the stock alternater pully diameter and divide by the stock crank pully. Then multiply by the new crank pully.
ex. 2" alt / 7" old crank * 6" new crank = 1.7" new alt pully
(just an example, I have no idea what actual sizes are.)
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