Posted By: Adrielp
Hey guys, I have a BB engine question? - 04/02/11 07:29 PM
Is there a formula available to determine how big a valve a particular bore can support? Like for instance, could a 4.375 bore handle a 2.4in diameter valve if the head could supply enough air flow. I know some of you engine gurus can point me in the right direction. This engine of course would be a very wild high end comp style engine turning +9000rpm. I'm thinking it would take that type of rpm to move the air. Thanks for the help, its much appreciated!
-Adriel
Posted By: blownzoom440
Re: Hey guys, I have a BB engine question? - 04/02/11 07:47 PM
i have seen a topic on this on speedtalk.com if you want to do a search there on it.
http://speedtalk.com/forum/viewtopic.php...87b39aef0d16e19
Posted By: Diablo
Re: Hey guys, I have a BB engine question? - 04/02/11 08:07 PM
My worry is what head are you going to try and use?
I'm pretty sure the wedge heads that can fit a 2.4 valve all need a min of a 4.5 bore. Although I could be wrong.
Posted By: dOc !
Re: Hey guys, I have a BB engine question? - 04/02/11 08:23 PM
BIG rpm .... gotsta' have have big valves OR many of them.
On the opposite end ...I am building a loooow rpm engine with smaller ports and smaaaall valves ... 1.88 and 1.50. But it will never see much-over 4500 or so.
