Some people do it to help unshroud the valves.
Some people do it to help unshroud the valves.
ok thats what i thought, it just seems like when people are talking about the performance mods, the first thing they say is bored .030 over, like its some big performance adder.
ok thats what i thought, it just seems like when people are talking about the performance mods, the first thing they say is bored .030 over, like its some big performance adder.
As mentioned... it IS a huge performance adder WHEN you have aftermarket cylinder heads.
If a person spends 1700.00 for nice heads with larger valves, why put them on a 4.00" bore or smaller?
Do some research on "flowed" cylinder heads. The company doing the benchwork almost never use a 4.00" bore. In most cases it's @ 4.060" or more.
To unshroud your intake air charge is a tremendous performance gain.
That's fine if you're running a deep breathing top end with a set of high dollar aluminum heads and are trying to eek out ever little pony there is, but for your average joe, its kind of a waste of time and money unless you're already in need of a rebuild, wouldn't you say?