Originally Posted by
XxAcCoRd94xX
after reading some post i have realized that wat i want to do is change my head to an h23 head (low compression)to boost the f22 block is cast iron so ther is no need to sleeve so by the end of the year i hope to have my engine nice and fast
The head swap does
nothing to change the fact that you've got a F22 block with over 200,000 miles on it. :shake:
I sincerely hope you are planning a full bottom-end rebuild when you do the head swap.
Because otherwise, you're going to be very unhappy when you spin a bearing or worse, throw a rod through the side of the block.
Also, the block material has no bearing on whether you need to sleeve.
The design of the block and the expected cylinder pressure are what determine the need to sleeve.