OST-053: Massaging a 20V Blacktop

[oldeskewltoy]

from another forum Wrote:What method did you use to get the head so clean?

I work with a couple of machine shops, part of the fees in doing head work is a professional cleaning, and checking the casting for its pressure holding ability - make sure there are no porosity issues

from another forum Wrote:Oooh, that's pretty neat.

What are the big advantages of going 20v over the stock 16v head? It seems like a lot of work to import for a mild gain.

There are 2 significant differences. The first is at lower level lifts, the intake side flows much better. At higher lifts, the flow tends to get closer, beginning to equalize. The second major difference is the exhaust size is significantly larger.

With that said... a ported 16V std valve head can be made to do everything, except equal the 20V @ low lifts.


having all the other projects now finished, or waiting on parts, I ficus on the Blacktop head - working the intake side first.


#1 in the right, #2 on the left.




more to come....