OD ATI Dampener question

Fastnature

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I seen some say stock dampener is 6.65 and ATI list it as 6.78. Ati says the 20% over measures 7.88. If I do the math neither of those work out to what ATI says. Can someone shine some insight on this? I need the right measurement of the ATI OD dampener so I can buy right paxton pulley so I dont over spin Paxton too far. I know that shift point also comes into affect. I am waiting on tuner to get back to me so I can factor that in also. Thanks guys. I am just waiting on last few things for build :banana:
 

Force Induced

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The stock I'm pretty sure is 6.75ish , just make sure if you use the ATI OD unit to use their water pump pulley. I would try it first with stock pulley and see how much boost you get then go from there. Or talk to JPC or beef should have better insight on this.
 
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Fastnature

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Thanks Force. I was not aware that ATI made a water pump pulley. But I did pickup a new billet water pump pulley for the OD dampener. I guess I can use the 6.78 to do calculations and if it off a tad it should be ok
 

Force Induced

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Thanks Force. I was not aware that ATI made a water pump pulley. But I did pickup a new billet water pump pulley for the OD dampener. I guess I can use the 6.78 to do calculations and if it off a tad it should be ok

The OD pulley depending on how much its over drive its usually 15% or 20% larger than stock.

I would call ATI or research to see what exact model comes with the balancer that still uses A/C and comes with the right water pump pulley.
 

Fastnature

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Just all speculation till I call ATI or someone chimes in that knows what ATI OD measures. But using their info on their site of 7.88 for the OD dampener I should be able to use a 3.15 pulley and overspin paxton to 64,841 rpm
 

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