Milling a predator 212 head.

[Chainlube]

I know paul mentions something about the valve guide helping with flow. He mentions that most people mow the guide off when porting. He said it's bad for valve stability for 1 & 2 it decreases with flow/mixture or port swirl.

I've never mowed off the valve guide, just shaped it a little bit for better flow.

 

[DieselTech]

The valve guides are not there as decoration...I can't believe that some folks would just "mow the guide off"...lol...lol.

Lol as a young kid I used to do it, b4 I knew much about porting. Lmao engine would run like a mofo in the upper rpm range, but was a dead dog on low end rpm.

 

[Chainlube]

The valve guides are not there as decoration...I can't believe that some folks would just "mow the guide off"...lol...lol.

Some guys are chasing every ounce of power and will do anything.

 

[DieselTech]

Some guys are chasing every ounce of power and will do anything.

Yeah like a complete titanium valve train, at the cost of $500 alone. Lmao then you still got to buy a cylinder head at $700 Wish I could afford it!!! Stupid money!!!

 

[DieselTech]

I've never mowed off the valve guide, just shaped it a little bit for better flow.

Its mentioned that a wedge shaped valve guide helps. Looks like a V-plow/V-snow plow when looking at guide thru the port. Should be shaped with the wedge pointing toward each side of valve bowl.

 

[Chainlube]

Yeah like a complete titanium valve train, at the cost of $500 alone. Lmao then you still got to buy a cylinder head at $700 Wish I could afford it!!! Stupid money!!!

I like to see what I can do with no money put into it at all, or very little. Somethings you need just for safety sake, just can't be ignored.

 

[DieselTech]

I like to see what I can do with no money put into it at all, or very little. Somethings you need just for safety sake, just can't be ignored.

Yeah as cheap as the predator/clones heads are, I'm thinking I could end up with a few. Lmao even end up having some that are a complete failure. How does the predator/clone engines oil the cylinder head? I'm curious. Theres a oil passage in cylinder head, & where push rods come thru head is the oil drain back to block.

 

[Chainlube]

Yeah as cheap as the predator/clones heads are, I'm thinking I could end up with a few. Lmao even end up having some that are a complete failure. How does the predator/clone engines oil the cylinder head? I'm curious. Theres a oil passage in cylinder head, & where push rods come thru head is the oil drain back to block.

No pump, so has to come from the slinger. It would be cool to have a clear case to watch the action.

 

[DieselTech]

No pump, so has to come from the slinger. It would be cool to have a clear case to watch the action.

They mention when max porting is done on the predator/clone cylinder heads, that you will cut into the supply oil feed to the cylinder head. There fix is to weld up cylinder head & drill smaller oil passage & install a brass tube in oil passage. To me it sounds like they got some type of pressure lubing, but I cannot find anymore info on the oiling side of the predator/clone engine.