Oversized valves 5sfe, checklist Options

[UVZ164]

My friend recently built his 88 bmw head and the difference it makes is unbelieveable. Since the 5sfe has an economy head im sure the difference if done right will be amazing.
After much research ive decided 2mm oversized valves a good port and polish and cams would be great.
The valves are what I need advice on, the 2jz valves are very close to the 5sfe just with bigger heads:

5sfe intake: 32x6x97.6 mm
2jz intake: 33.6x5.98x98.55 mm

5sfe exhaust: 27x6x98.4 mm
2jz exhaust: 29x5.98x99.1 mm

So I would go with stock 2jz exhaust valves and +0.5mm, 2jz intake valves.
This might be a stupid question but apart from the machine shop regrinding the valve seats to fit the OS valves what else do I need to do?
Will i need 2jz stem seals?, will i need different buckets/lifters since the stem length is slightly different?

This isnt a job im going to be undertaking soon more just research and saving the $$ stage because getting beaten by civics at the track is giving me the irrits lol.
Any help would be appreciated!

Thanks

[Syaoran]

A GOOD head job will give you a noticeable increase in power, even in our economy heads. While it's true that a GE head flows much better, you don't really NEED it, since ultimately it'll cost you about the same to work your FE head as to get a GE head, and then the wiring nightmare that is swapping heads... etc. It's for someone that's really up to the task.

I believe that with 2JZ valves you don't need new valve stem seals. The valve stems are close to the same on our stock valves, they are just longer, something you might also want to consider.

You will also want to look into new valve springs and retainers.


Whether you are or not going with cams (moreso if you are than if you aren't) you should get something to tune the new airflow, and you might even need bigger injectors. Just some things you should also consider.