Open Chamber Heads and Seat Ring Leak

In this video we show you the different types of open chamber cylinder heads that we offer. There are many different choices out the and we know what ones are the best. We look at many different things before we even start doing any kind of work to them. Pressure testing and magnafluxing are vary important steps that we take when it comes to making sure a head will work. The next thing is checking the valve seats. We explain why in the video.
www.castheads....

[@chestermeeks4321]

What about at 351 Cleveland that has no 2 dot or 4 dot on it

[@deerslayer5863]

Are mexico 369 good castings

[@ericmatthews]

What have you learned from the 920 heads? Have you worked with those much?? Thanks.

[@BrzezinskiRacingProducts]

Haven't done much with those so not much to say about them.

[@HammerDownRacing247]

did the 993 heads come with 2.02 valves and 1.94? I have a set and I'd like to run them on my race car that I'm pretty sure are 2.02. I know a 2.02 valves won't work as well. If they are 2.02 can they be changed to 1.94? Thanks for the videos

[@BrzezinskiRacingProducts]

in stock form they should only be a 1.94. so unless someone already has put a 2.02 in them you should be ok. you can always give us a call Toll Free: 866-236-6300 or send us a email at [e-mail] and we can do what we can to help you out.

[@HammerDownRacing247]

Cast Heads how much power loss are we talking with the 2.02 valves in 993s?

[@ericmatthews]

Great video! What about the 993 "Hecho en Mexico" heads? I've heard some guys say they are better than the non-Mexico heads. Any truth to that??

[@BrzezinskiRacingProducts]

The heads that say "Hecho en Mexico" have smaller ports, similar to the "conv v" heads.

[@ericmatthews]

Ok. Thanks for the info. Love your videos...keep em coming..

[@ericmatthews]

Would love to see you do a video explaining and showing the 2 into 1 exhaust and why it works. The different size pipe and numbers output for each.

[@BrzezinskiRacingProducts]

What 2 into 1 exhaust are you talking about?

[@ericmatthews]

The ones for the log manifolds and corvette manifolds that you offer.

[@russcoffell3560]

Im surprised the larger bore doesn't unshroad the valve making more power? This is inconsistent with testing and base engine design theory (which the bible given to all GM new hire). Do you feel larger valves on Vortecs are worth the upgradinv if you already cutting seats, providing backcut valves, for a 4.000' bore GEN1 with Vortec heads? Thanks for the informative post.

[@BrzezinskiRacingProducts]

There is a fine line when it comes to valve size and flow numbers. bigger isn't always better in a lot of cases. in a way you did answer your own question. It is theory, not law, so as it may seem like the bigger valve will give you more flow, it hurts the air speed, causing less flow

[@briana3467]

I hate when my head leaks!