Piston Ring Gap Recommendation for boosted Gen 3 Hemi engine - Hemi Truck Club
 
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Old 03-22-2012, 05:37 AM   #1
Stu
 
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Looking for the calculation for recommended ring gaps per pound of boost on a turbocharged Gen 3 engine.

Example: 10psi boost, the recommended ring gap is .006 per inch of bore. .023/.024 recommended ring gap.

What would it be for 15psi boost?

Could this calculation be used?
.006 divided by 10 = .0006
.0006 x 15 = .009 per inch of bore.
.009 x 3.937 = .035 recommended ring gap.

Sure seems like allot of ring gap?????

SuperJay

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Old 03-22-2012, 05:37 AM   #2
Stu
 
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Looking for the calculation for recommended ring gaps per pound of boost on a turbocharged Gen 3 engine.

Example: 10psi boost, the recommended ring gap is .006 per inch of bore. .023/.024 recommended ring gap.

What would it be for 15psi boost?

Could this calculation be used?
.006 divided by 10 = .0006
.0006 x 15 = .009 per inch of bore.
.009 x 3.937 = .035 recommended ring gap.

Sure seems like allot of ring gap?????

SuperJay
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Old 03-23-2012, 09:13 AM   #3
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Total Seal recommends for the top rings: Bore X .0055" for forced induction (Supercharged or Turbo) running on gasoline and Bore X .0035" for the 2nd rings. If you're running Total Seal Gapless top rings then the formula is Bore X .0070"
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Old 03-23-2012, 11:40 AM   #4
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SuperJay
Each piston and ring manufacture will give you slightly different figures. Below is
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Old 03-25-2012, 05:49 PM   #5
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Thanks 04HEMIQUAD and Superjay.
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