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I'm looking to buy the Unorthodox racing pulleys but I just want to hear some reviews about them, do you need to retune after installation? Anything will help thank you!
 

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would like to know more about this also
 

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2015 Honda Civic Si Coupe
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i remember being told years ago that underdrive pulleys won't do any good, or a a bad mod (one of the two). I never looked into though.
 

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I had UR pulleys on my old car RSX-S. I had them on for the life of the car and raced it at the track on the weekends. I used to race my friends modded MR2 Turbo and he would pull on me each time but after I installed my pulleys I made up some time / trap speed. Def felt a gain IMO.
 

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I have the Buddy Club pulley set that underdrives both the Crank and Alternator pulley. It's all relative but I "think" the car accelerates more efficiently.

No tune needed.
I bought the Unorthdox crank pulley for my 8th Gen (not under drive - just lightweight) and it helped rev on demand. Was running F.P. and lightweight flywheel. Was told that a crank pulley without a dampener was bad from the race crowd. Same folks with turbo's and S/C's. Meh, if it added, it didn't hurt mine for 100k+ miles. Died at 310k due to sudden stop. Engine still ran. Gauge for yourself.
Big rotational weight savings. Go for it.
 
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