Pro's/Con's of Aftermarket Underdrive pullies in 2005-09 Ford Mustang GTs

[NJ09GT]

Is there any benefit to aftermarket underdrive pullies in 2005-09 Ford Mustang GTs?
Is this a good supporting mod?

[Web-Admin]

With UDP's you should see a 1-2 horsepower gain at the wheels. It's very, very minor.

There's only one drawback, and it's that your alternator won't charge the battery as much as stock at idle, but beyond 1500RPM it's exactly the same. Your battery will still charge at idle, just not as much.

[Hotshot]

i am not convinced that the pros fro UDP's outweigh the cons. Also the best kind is the Steeda style one that they make for our cars.

[Plentipower]

Originally Posted by MistaX

With UDP's you should see a 1-2 horsepower gain at the wheels. It's very, very minor.

There's only one drawback, and it's that your alternator won't charge the battery as much as stock at idle, but beyond 1500RPM it's exactly the same. Your battery will still charge at idle, just not as much.

Couldn't have said it better myself! In reality they are not worth it unless you are running your car at high rpm for a long period of time. In most street cars you will not see a bit of difference.

Mike
BDP

another vote for useless

[Blackgt09]

thanks for keeping me from another waste of money ill take the 180 somewhere else... but if you are looking for udp's summit racing has them cheapest so far and also you can save 100 on the borla stinger cat backs there apposed to our linked site american muscle