Request clearances advice
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Teching In
Joined: Jul 2005
Posts: 46
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Request clearances advice I mocked up the motor tonight and came up with the following clearances:
Crankshaft endplay: .0055
rod-to-rod gap: .020
piston to deck height: .020
The one i'm looking at is of course, is how far the piston is sitting in the hole. With the Fel-Pro 1074s, I end up with a .059 quench height; not good.
-Should I zero deck the block to get the quench down to .039? Or should I just use the .029 Impy gaskets and only drop my quench down to .049 and will that be tight enough on the 8-10 lbs of boost I plan on running?
- If I need to deck the block, can I do so without distorting the cylinder bore, or do I need to have the torque plate hone redone as well?
-Tightening the quench of course will raise my compression, but i'm going to open up the head chambers from their current 52 CC to around 58; giving me 9.2 to 1 on the .029 gasket or 9.4 to 1 on the decked block option.
To summarize, which is better. 9.2 to 1 w/.049 quench (.020 deck height) or 9.4 to 1 w/.039 quench (zero deck height)?
Cheers,
John
Crankshaft endplay: .0055
rod-to-rod gap: .020
piston to deck height: .020
The one i'm looking at is of course, is how far the piston is sitting in the hole. With the Fel-Pro 1074s, I end up with a .059 quench height; not good.
-Should I zero deck the block to get the quench down to .039? Or should I just use the .029 Impy gaskets and only drop my quench down to .049 and will that be tight enough on the 8-10 lbs of boost I plan on running?
- If I need to deck the block, can I do so without distorting the cylinder bore, or do I need to have the torque plate hone redone as well?
-Tightening the quench of course will raise my compression, but i'm going to open up the head chambers from their current 52 CC to around 58; giving me 9.2 to 1 on the .029 gasket or 9.4 to 1 on the decked block option.
To summarize, which is better. 9.2 to 1 w/.049 quench (.020 deck height) or 9.4 to 1 w/.039 quench (zero deck height)?
Cheers,
John
