Is there any disadvantage to getting these. As i understand it the pullies allow the alternator and the water pump to make fewer revolutions when the engine is spinning at the same speed. Would this mess anything up? How much power would i expect to see? Any info? thanks
U/d pullies
- Thread starter townethug
- Start date
dont install the underdrive on the alt. the other 2 are gonna work fine. you shouldnt notice any difference in your temp, but just to be safe, get a bottle of water wetter.
yes, they are worth it. what other mod can you do to add 10-15 hp for only $79?
yes, they are worth it. what other mod can you do to add 10-15 hp for only $79?
I just installed a set of March "Power and Amp" pullies on my 93 last weekend. They went on really easily and I've seen no appreciable decrease in charging, at least according to the factory gauge. There is a noticable increase in power judging by the seatofthepantsometer.
http://www.marchperf.com/pg29.html
http://www.marchperf.com/pg29.html
cevtv
Founding Member
The "Power & Amp" set has an overdrive alternator pulley, so that the alt. spins at the normal revs, keeping the output the same as stock.
willys1
Active Member
Well,,I just put on a set of March pullies,not too shoot anyone down but,I didnt feel anything.It doesnt charge at idle,and it takes longer to cool down between runswythors said:
cevtv
Founding Member
willys1 said:Well,,I just put on a set of March pullies,not too shoot anyone down but,I didnt feel anything.It doesnt charge at idle,and it takes longer to cool down between runs
Did you get the Power & Amp set, or just regular underdrives?
super302
I'd do anything for free Bapples
just don't install it on the alt. if you're worried
PhLoBuS
New Member
Michael Yount
Mustang Master
No one can tell you what's gonna happen on your car in your location the way you drive. You'll have to try them and see. There are so many variables -- a non-air conditioned stock 5-spd. Stang in rural Canada in October with a new Griffin aluminum radiator is whole different animal than a boosted intercooled, air conditioned, auto transmissioned, Stang in Houston in August in stop and go traffic.
The underdrives slow down all accessories - including the water pump, alternator and the fan (if you have mechanical fan). Consequently, some people have problems with battery charging at low speeds when they install u/d's. Some people have cooling problems when they install u/d's. The only way to know is to try.
There are some rules of thumb - anything which adds more heat to the system, or more electrical load is not your friend when it comes to underdrives. So, if you have air conditioning, automatic transmission, tranny or oil coolers installed in front of the radiator, performance mods, intercoolers in front of the radiator, big amp stereo equipment, electric cooling fans, high amp headlights, etc. - you're more likely to have problems with u/d's than if you don't have those things. Also, if your radiator is original - you're more likely to have problems because it's likely lost a significant amount of it's heat transfer capacity.
The underdrives slow down all accessories - including the water pump, alternator and the fan (if you have mechanical fan). Consequently, some people have problems with battery charging at low speeds when they install u/d's. Some people have cooling problems when they install u/d's. The only way to know is to try.
There are some rules of thumb - anything which adds more heat to the system, or more electrical load is not your friend when it comes to underdrives. So, if you have air conditioning, automatic transmission, tranny or oil coolers installed in front of the radiator, performance mods, intercoolers in front of the radiator, big amp stereo equipment, electric cooling fans, high amp headlights, etc. - you're more likely to have problems with u/d's than if you don't have those things. Also, if your radiator is original - you're more likely to have problems because it's likely lost a significant amount of it's heat transfer capacity.
