5.flow

ok, i want to get underdrive pullies for my 87 gt. my questions are

what brand is good to go with?

will i need a different sized belt?

is this ok for a daily driver?

what kind of hp gains can i expect, and will i notice a difference?

1fast50

well i was looking at brenspeed.com and they had some for about $65. Im not sure about the size belt, but they give up to 15hp..

Sacmo

You won't need a different size belt as long as you have all the usual stuff on it (smog pump, pwr steering, ect)

I got motosport on mine, never heard any real difference between the brands, with the exception of various sizes...

It's ok for a daily driver... You will feel a little more pep but nothing to write home about...

5.flow

cool

Pure5.0

Any brand should be good (since it is just machined metal)

A smaller belt will work but I think as long as your tensioner still has tension you should be ok

Daily driver? Yes if you do a lot of Highway driving. If you do a lot of city then charging your batt could have issues...unless you have a higher amp alt.

They claim up to 15hp but I think you will get around 7. Not a in your pants feel but your engine should rev quicker and you should get a little gain.

PRO50SC

I put BBK's on my wifes 90 vert and it needed a smaller belt. stock belt was way too big!

Stanpower

I heard that the Foxbody cars have problems with the charging system when putting these pulleys on. I'm not a 100% because I have a 95......Just a thought make sure.......

91stang

i'd go for steel cause i've heard aluminum wears out quicker... also for a dd in the city might not be good. tends to overheats sometimes because it slows down the accesories.

no real gain... i plan on doing a bunch at a time like remove somg and ac and add u/d pullies which will result in a bigger difference but like said up there ^^^ nothing to write home for

91stang

also when i put them on i plan on not putting on the alt becasue of the charge issue

Pure5.0

thats due to the super small 75amp stock alt we have....that barely charges the car with normal pullies when idling at night....LOL