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10% Vs 25% Underdrive Dampner

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Old Dec 12, 2013 | 12:23 PM
  #1  
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JerkyNic
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Default 10% Vs 25% Underdrive Dampner

I am wondering if anyone has installed a 25% underdrive on a daily driver and is there noticable issues with the accessories? I have found a few sizes between ATI and SLP and would like to get one on the way before I have to return to Houston and need the car again.

Thoughts, Suggestions... Warnings?
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Old Dec 12, 2013 | 05:46 PM
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big problem with broken timing chains with ether of them MHO the potential gains ain't worth the problems, go with a good SFI rated pulley in stock size, get real HP else where TUNE IT!
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Old Dec 12, 2013 | 06:04 PM
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The broken chains that you know of... where they on cars that people raced or everyday cars? I ordered it about an hour ago after not hearing or seeing any other reports of issues. I have plans to have a cam swap and it reprogrammed at a later date. I have to admit, you now have me concerned with causing more damage... thanks for that BTW. LOL
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Old Dec 12, 2013 | 09:34 PM
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both track and street cars, there' been far too many to ignore on LS motors, you will have some tell you to go to a stronger chain, but you can get better HP else where IMHO
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Old Dec 12, 2013 | 10:00 PM
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OP: Go with the ATI unit and maybe add one of these - http://store.katechengines.com/bille...sioner-p2.aspx As for the timing chain, as long as you use the ATI unit, your chances are very small from what I have seen. The OEM unit is garbage, IMO.

Also, if you are going to do a cam install, I would do both items together in order to save on time and labor. Here is a great shop, if you are in Houston Texas - http://www.510racingllc.com/

Good luck with your mods!

Last edited by Gering; Dec 12, 2013 at 10:03 PM.
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