Dayco Belt tensioner
12-04-2007, 08:11 AM
#32
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Ok I tested the Tensioners last night Check pic,
I used a pull gauge (not very scientific) and tested all at mid travel, any way the stock tensioner that came with the Radix kit tested at 30 to 32 lbs, the Dayco (new) tested at 35 to 36 lbs, both of those parts are very smooth and respond quickly to a 2 lbs change, the Gates part looks much stronger and well built it tested at 40 to 43 lbs but was stiff to move and took 10 to 12 lbs to respond to movement.
On truck testing- I found that if I peddled the truck in first gear once the (tensioner that came with the Radix kit) the belt would jump off the tensioner pulley two ribs forward. then I tested the Gates part and so far the belt has stayed in place, also I did a couple off pulls this morning (37deg weather) and I data logged with HPTuners as I always do and it appears that my KPA log is smoother (only .3 psi fluctuations) than with the Radix supplied tensioner, and so far no belt dust.
So far it Looks like the Gates tensioner may be the one for better reliability and less belt slip, more testing in the works.
I used a pull gauge (not very scientific) and tested all at mid travel, any way the stock tensioner that came with the Radix kit tested at 30 to 32 lbs, the Dayco (new) tested at 35 to 36 lbs, both of those parts are very smooth and respond quickly to a 2 lbs change, the Gates part looks much stronger and well built it tested at 40 to 43 lbs but was stiff to move and took 10 to 12 lbs to respond to movement.
On truck testing- I found that if I peddled the truck in first gear once the (tensioner that came with the Radix kit) the belt would jump off the tensioner pulley two ribs forward. then I tested the Gates part and so far the belt has stayed in place, also I did a couple off pulls this morning (37deg weather) and I data logged with HPTuners as I always do and it appears that my KPA log is smoother (only .3 psi fluctuations) than with the Radix supplied tensioner, and so far no belt dust.
So far it Looks like the Gates tensioner may be the one for better reliability and less belt slip, more testing in the works.
Last edited by LBSBLOWN; 12-04-2007 at 11:17 AM.
Great job!
12-05-2007, 07:01 AM
#35
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You are probably the only person in the world driving a Magnuson charged truck with that tensioner. Can't believe we can't get you to take one for the team. 
We know he Dayco unit doesn't fair well to spirited throttle inputs. Inquiring minds want to know how the Napa unit holds up. 
We know he Dayco unit doesn't fair well to spirited throttle inputs. Inquiring minds want to know how the Napa unit holds up. Kysilverado The Gates tensioner has held up to way more then the dayco ever did. Test complete.
Ok I tested the Tensioners last night Check pic,
I used a pull gauge (not very scientific) and tested all at mid travel, any way the stock tensioner that came with the Radix kit tested at 30 to 32 lbs, the Dayco (new) tested at 35 to 36 lbs, both of those parts are very smooth and respond quickly to a 2 lbs change, the Gates part looks much stronger and well built it tested at 40 to 43 lbs but was stiff to move and took 10 to 12 lbs to respond to movement.
On truck testing- I found that if I peddled the truck in first gear once the (tensioner that came with the Radix kit) the belt would jump off the tensioner pulley two ribs forward. then I tested the Gates part and so far the belt has stayed in place, also I did a couple off pulls this morning (37deg weather) and I data logged with HPTuners as I always do and it appears that my KPA log is smoother (only .3 psi fluctuations) than with the Radix supplied tensioner, and so far no belt dust.
So far it Looks like the Gates tensioner may be the one for better reliability and less belt slip, more testing in the works.
I used a pull gauge (not very scientific) and tested all at mid travel, any way the stock tensioner that came with the Radix kit tested at 30 to 32 lbs, the Dayco (new) tested at 35 to 36 lbs, both of those parts are very smooth and respond quickly to a 2 lbs change, the Gates part looks much stronger and well built it tested at 40 to 43 lbs but was stiff to move and took 10 to 12 lbs to respond to movement.
On truck testing- I found that if I peddled the truck in first gear once the (tensioner that came with the Radix kit) the belt would jump off the tensioner pulley two ribs forward. then I tested the Gates part and so far the belt has stayed in place, also I did a couple off pulls this morning (37deg weather) and I data logged with HPTuners as I always do and it appears that my KPA log is smoother (only .3 psi fluctuations) than with the Radix supplied tensioner, and so far no belt dust.
So far it Looks like the Gates tensioner may be the one for better reliability and less belt slip, more testing in the works.
12-05-2007, 07:49 AM
#36
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LBSLOWN I dont see a gates tensioner in youre pics I see 2 daycos am I missing something?
The two pics shown are of the Magnuson supplied unit, one sitting static and the other in test at half travel to show what I was doing.
