Installing larger valves in 4.8/5.3 heads??
11-14-2001, 02:22 PM
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Installing larger valves in 4.8/5.3 heads?? First off what is the difference between the 4.8 and 5.3 heads? If any?
Between the 5.7 and 5.3 and 4.8? Specifically valve size and chamber volume?
Second I am pretty sure the 4.8 and 5.3 heads have
smaller valves than the 5.7.
What is required to install stock 5.7 size valves in the 4.8 and 5.3 heads? How much $$ to do that?
Will new seats be needed or simply a regrind?
Between the 5.7 and 5.3 and 4.8? Specifically valve size and chamber volume?
Second I am pretty sure the 4.8 and 5.3 heads have
smaller valves than the 5.7.
What is required to install stock 5.7 size valves in the 4.8 and 5.3 heads? How much $$ to do that?
Will new seats be needed or simply a regrind?
11-14-2001, 04:08 PM
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Re: Installing larger valves in 4.8/5.3 heads?? DEMON,
The 4.8\5.3 heads are the same.The stock dia. is 1.84",the stock F-body valves 2.00" fit in with just a valve job touch up on the seat.The factory seat can take up to a 2.055" valve.
Allan
The 4.8\5.3 heads are the same.The stock dia. is 1.84",the stock F-body valves 2.00" fit in with just a valve job touch up on the seat.The factory seat can take up to a 2.055" valve.
Allan
