shave head, to raise compresion Options

[95celigt]

Has anybody done this or know the effects it will have on a 5f?

[SpedToe169]

It wasn't ever done to save weight. When you're taking about shaving a head, you're talkin about taking 0.040". Thats not even going to save a pound. Its done soely to raise compression.

Its totally doable on our motors and will improve performance. It needs to be done by a good machine shop. Since you'll have the head off anyway, its a really good idea to have a valve job done and put in new seals at the same time. You won't want to take too much off or you'll have to have custom pistons to provide enough clearance for the valves. You're also not going to want to raise the compression much past 10.5:1 if you're going to continue running pump gas. Some combustion chamber designs will allow for higher compression than that on pump gas, but ours likely will not.

Try to find a machine shop that does performance work on imports and preferrably one thats worked with toyotas before. The quality of the shop will make or break the deal.