Steeda Underdrive Pulleys
Thread Starter
2nd Gear Member
Joined: May 2009
Posts: 247
From: SC
I just did the pullies after having an intake & tune for a couple years, and I noticed the difference. I had lowered my idle down to ~650 rpm from 750 stock a while ago. The car didn't quite handle it well; occasionally it would try to adjust down to 650 and it would keep dropping down past 500, then stutter and jump to 900. With the pullies, it's really stable. I also noticed the smoother operation; something I wasn't expecting. No real reason to do them at the same time though. Get the intake & tune first.
5th Gear Member
Joined: Jul 2009
Posts: 2,215
From: Delaware
Do UDP's do any damage? obviously if they are 'under drive' they aren't doing something as much. Which components do these UDP's go on and what is the actual effect? Will it cause any problems later on? Thanks!
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