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How do YOU tell if your damper is still good? #3132379 03/26/23 08:59 AM 03/26/23 08:59 AM
Joined: Dec 2006 Posts: 3,395 Pa Hot 340 OP master
Hot 340 OP master Joined: Dec 2006 Posts: 3,395 Pa	Besides just buying an ATI, how do you tell if it needs rebuilt or not doing its job. I'm asking from a technical perspective, not a price point perspective. Internal clues to look for ect?

Re: How do YOU tell if your damper is still good? [Re: Hot 340] #3132426 03/26/23 12:00 PM 03/26/23 12:00 PM
Joined: Oct 2006 Posts: 1,264 New York, USA Chargerfan68 pro stock
Chargerfan68 pro stock Joined: Oct 2006 Posts: 1,264 New York, USA	I would replace a stock dampner if: 1. any wobble 2. Outer ring slipped and timing mark is off ( you can confirm this) 3. Rubber is cracked or disintegrating 4. You race you car and rev over 6-6500 rpm regularly. ( in this case, I would also replace stock steel pulley with cnc alum). Mine exploded at top end of track on a run. I got lucky even though I drove over it with slick. ) 1.50 60Ft. , 10.75@ 127MPH Hauling 3900 LBS.

Re: How do YOU tell if your damper is still good? [Re: Hot 340] #3132427 03/26/23 12:00 PM 03/26/23 12:00 PM
Joined: Aug 2003 Posts: 43,180 Bend,OR USA C Cab_Burge I Win
Cab_Burge I Win C Joined: Aug 2003 Posts: 43,180 Bend,OR USA	if the outer ring is still in the stock location by verifying TDC on it,, hasn't spun, and the motor is not vibrating I would consider it good Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)

Re: How do YOU tell if your damper is still good? [Re: Hot 340] #3132428 03/26/23 12:03 PM 03/26/23 12:03 PM
Joined: Jan 2003 Posts: 31,035 Oregon A AndyF I Win
AndyF I Win A Joined: Jan 2003 Posts: 31,035 Oregon	Originally Posted by Hot 340 Besides just buying an ATI, how do you tell if it needs rebuilt or not doing its job. I'm asking from a technical perspective, not a price point perspective. Internal clues to look for ect? ATI recommends regular rebuilds on their dampers. Pro guys rebuild every season, bracket guys might go a few seasons between rebuilds. NASCAR rebuilds after every race. It all depends on how serious you are and how much power you're making.

Re: How do YOU tell if your damper is still good? [Re: Hot 340] #3132431 03/26/23 12:32 PM 03/26/23 12:32 PM
Joined: Oct 2007 Posts: 4,206 New York polyspheric master
polyspheric master Joined: Oct 2007 Posts: 4,206 New York	Never mind Boffin Emeritus

Re: How do YOU tell if your damper is still good? [Re: polyspheric] #3132518 03/26/23 07:53 PM 03/26/23 07:53 PM
Joined: Dec 2006 Posts: 4,647 aotearoa rebel master
rebel master Joined: Dec 2006 Posts: 4,647 aotearoa	Pull the damper off the crank snout. Look for any wear pattern on the crank. It should look perfectly machined with no fret marks. I pulled a 440 Source damper off a crank once that was total junk. Had to drill it & then cut it off. The fret marks were unbelievable, it had been tryn to weld itself together. The engine itself was suffering from harmonics & all the bolts were coming loose. Hence I'll never buy that brand of junk myself.

Re: How do YOU tell if your damper is still good? [Re: Hot 340] #3132698 03/27/23 11:42 AM 03/27/23 11:42 AM
Joined: Jan 2003 Posts: 75,008 U.S.S.A. JohnRR I Win
JohnRR I Win Joined: Jan 2003 Posts: 75,008 U.S.S.A.	Originally Posted by Hot 340 Besides just buying an ATI, how do you tell if it needs rebuilt or not doing its job. I'm asking from a technical perspective, not a price point perspective. Internal clues to look for ect? what damper do you have ? running up my post count some more .

Re: How do YOU tell if your damper is still good? [Re: Hot 340] #3132746 03/27/23 02:02 PM 03/27/23 02:02 PM
Joined: Oct 2007 Posts: 4,206 New York polyspheric master
polyspheric master Joined: Oct 2007 Posts: 4,206 New York	The damper’s rubber ring will naturally decay with age, mileage, exposure to hot chemicals, vibration, ozone, and ultra-violet light, and become unsuitable for even a stock engine, let alone high performance or racing use. Visible signs of damage and potential failure include: » the rubber is partially missing » the rubber is discolored gray or “chalky” » the rubber has surface cracking » the rubber has been partially extruded » the damper rim is dented or bent » the damper is loose on its hub or on the crankshaft nose » the damper rim has excessive run-out (“wobble”) » a “squeaking” noise that defies detection Boffin Emeritus

Re: How do YOU tell if your damper is still good? [Re: polyspheric] #3132775 03/27/23 03:27 PM 03/27/23 03:27 PM
Joined: Jan 2003 Posts: 20,556 Eagle, Idaho Neil The Doctor is in.
Neil The Doctor is in. Joined: Jan 2003 Posts: 20,556 Eagle, Idaho	This place might be a solution for anyone who needs one refurbished? https://damperdoctor.com/ Last edited by Neil; 03/27/23 06:12 PM.

Re: How do YOU tell if your damper is still good? [Re: Neil] #3132777 03/27/23 03:48 PM 03/27/23 03:48 PM
Joined: Dec 2013 Posts: 4,674 Wichita G GY3 master
GY3 master G Joined: Dec 2013 Posts: 4,674 Wichita	I wait until they start banging and scraping against the timing cover! I've had both an OEM and 440 Source go bad in the last few years. Both showed no signs of failure before coming apart. '63 Dodge 330 11.19 @ 121 mph Pump gas, n/a, through the mufflers on street tires with 3.54's. 3,600 lbs. 10.01 @ 133mph with a 250 shot of nitrous an a splash of race gas. 1.36 60 ft. 3,700 lbs.

Re: How do YOU tell if your damper is still good? [Re: polyspheric] #3132938 03/28/23 09:22 AM 03/28/23 09:22 AM
Joined: Jan 2003 Posts: 75,008 U.S.S.A. JohnRR I Win
JohnRR I Win Joined: Jan 2003 Posts: 75,008 U.S.S.A.	Originally Posted by polyspheric The damper’s rubber ring will naturally decay with age, mileage, exposure to hot chemicals, vibration, ozone, and ultra-violet light, and become unsuitable for even a stock engine, let alone high performance or racing use. Visible signs of damage and potential failure include: » the rubber is partially missing » the rubber is discolored gray or “chalky” » the rubber has surface cracking » the rubber has been partially extruded » the damper rim is dented or bent » the damper is loose on its hub or on the crankshaft nose » the damper rim has excessive run-out (“wobble”) » a “squeaking” noise that defies detection all good stuff right here . running up my post count some more .

Re: How do YOU tell if your damper is still good? [Re: JohnRR] #3135905 04/06/23 11:34 AM 04/06/23 11:34 AM
Joined: Dec 2006 Posts: 3,395 Pa Hot 340 OP master
Hot 340 OP master Joined: Dec 2006 Posts: 3,395 Pa	Sorry for the late reply..been busy. Thanks for the input, I had a sfi powerbond on it and just wanted to see if there were clues in the rotating assembly to look for while I had it apart to see if it was doing its job. I just decided to go with an ATI... Last edited by Hot 340; 04/06/23 11:35 AM.

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