[Motomatt068]

I am looking to get maybe a 42% reduction UDP but im worried about my stereo system. I have a 12in sub with a smaller amp. Am i going to notice any promblems with a smaller UDP???

 

[Tuflehundon]

How big is a "small amp"?

It may not be a good idea with your amp.

 

[963.8]

I was also thinking of pulley's but wasn't sure about my 2 10" subs and 1200 watt amp.

 

[shinerstang]

It is a large reduction, but as long as you're not in alot of traffic daily, you should be fine. You may have to upgrade your alternator to run a large sub or get a cap.

 

[Tuflehundon]

Ya I would agree with shinerstang on this one. A cap would be a good idea with that big of an amp anyway. If you had any problems I would go with a bigger alternator to. I had a 1000 watt amp in my 95 GT with 2 10"s and had to run a bigger alternator, and I upgraded my battery. The cap would deffinatly help because your stereo doesn't always use that much power and the cap would store the extra power till needed. I had problems with my interior lights dimming every time the subs would hit hard. After I put the cap in that problem went away.

By the way how much of a HP gain do you get from underdrive pulleys? I don't have any subs to worry about. I have a vert, not much room for big a$$ speakers.

 

[963.8]

I already have a cap. So I should be okay to get pulley's?

 

[tex117]

I had 2 10's with a 42% UD and I never had any issues.
With 42% UD you should get about 10-12 hp.