Head milling question/valve clearance
06-22-2010, 05:57 PM
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Head milling question/valve clearance These are probably somewhat of a common question, but here goes:
We're building a budget 5.3 for a racetruck. Trying to raise the comp as much as possible, with the stock dished pistons, using 5.3 heads.
The goal is to get to at least 10.5 to one to work with the TFS 228/230 cam we have. To do this the head cc has to come down 8cc's or more. Based on the formula i found here 8 x .007 is .055.
Now at that amount we're going to have to mill the intake face. Does anyone know the formula for these engines on the amount to take off the intake side to match the milling of the deck surface? I figure we'll do about .060 given everything else seems to clear.
Second question, this one valve clearance. Will we have any issue's running the TFS 228/230 .585 cam without flycuting? Running 1.89 intake valves, and the stock dished pistons, just the amount we want to mill is my only concern.
Thanks
Yeroon
We're building a budget 5.3 for a racetruck. Trying to raise the comp as much as possible, with the stock dished pistons, using 5.3 heads.
The goal is to get to at least 10.5 to one to work with the TFS 228/230 cam we have. To do this the head cc has to come down 8cc's or more. Based on the formula i found here 8 x .007 is .055.
Now at that amount we're going to have to mill the intake face. Does anyone know the formula for these engines on the amount to take off the intake side to match the milling of the deck surface? I figure we'll do about .060 given everything else seems to clear.
Second question, this one valve clearance. Will we have any issue's running the TFS 228/230 .585 cam without flycuting? Running 1.89 intake valves, and the stock dished pistons, just the amount we want to mill is my only concern.
Thanks
Yeroon
