opinions on built head

[emericaskater285]

I am going to be getting my engine ready soon, and have been trying to decide on what to do on the top end.

What I do know I am going to be doing to the top end so far is a full port(not sure who I will have do the work), already have BC 272 cams, retainers, and springs to match.

For the bottom end I have a fully built bottom end with billet main caps, etc.
Other specs, I am on e85, aem v1, pt6766 turbo (possibly will be going larger), Built th350, all the supporting goodies. Going to be looking to push some power through this trans. May eventually end up with a built 4l80e to hold the power.

So what I am trying to figure out is what should I do for valves, and guides? I have been thinking BC 1mm oversize valves with their bronze valve guides. Just trying to see if people have anything bad or good to say about these, and also what my other options are.

The other thing I am going to be doing is shim-less buckets. I just need to know what my best option here would be. I am going to be revving this engine very high, and would like to figure out what shim-less buckets could fit in here.

Any and all help is appreciated.

 

[hvyman]

I would use oversized valve. Bc valves are not that expensive.

For the shim less put the cams in the head and get the clearances right and then measure from inside the bucket to the top of the shim. That will give you the thickness you need for the shimless. There are a few threads around that show the shimless bucket thickness and part number. Also could go to the junkyards and look for a car that came with them.

 

[atmperformance]

pro tip use a Scour Pad (the green ones) and a solvent like brake cleaner to remove all the oil off shims and/or buckets before measuring and you'll find a more accurate reading, often oil can throw you off 1 or 2 thousand.

 

[emericaskater285]

Thanks guys. Any more words of advice would be helpful.

I have ended up buying BC 1mm oversize valves and BC valve guides.

 

[din904]

I had problems locating the shim-less buckets from toyota so I got some shim under bucket from supertech the part # is CF-28/3.65+ and also be careful with the springs some of them require smaller valve stem seals.