The Dodge Challenger Message Board

I had a book written by this guy but lost it. Jan I'll be doing some of this stuff. http://www.popularhotrodding.com/tech/0 ... index.html makes you want to go out and turn the ports into 'mirrors' and large enough to stick your fist into them

Very detailed and very interesting. Thanks for posting that mate.

Thanks for the reading Ed.


I suppose you have already seen this(?)
http://www.popularhotrodding.com/engine ... index.html

http://www.popularhotrodding.com/engine ... index.html





http://www.chevyhiperformance.com/techa ... index.html

Thanks Dave&Jimi. Yes, Jimi I have read those but thanks for posting them. If you guys can, and want to, lets make this post a cylinder head Tech&Comment section and add any info we can about cylinder head performance and what to do or not do. In addition to mine, Jimi's and the archives on the CMB, keep it coming, Jan will be here soon. I have a 500 cubic inch plant and 210 CC intake ports with 2.14 intake and 1.81 Exhaust. Definitely undervalved and the ports are large enough for a 400-440 cube plant but not for a 500 cube.. My RPM's will be 6800 RPM MAX so I want to maximise flow below this engine speed and my lift will be around .600 max. I am looking for velocity,balance, great flow at all rpm ranges if thats possible, I also dont want to destroy any turbulence or tumble but a semi-shrouded intake valve induces these attributes so I have to be careful there. and Thanks BTW, I read anything I can get my hands on if it's written by David Vizard, Jon Kaase, Roger Helgeson, Joe Mondello. Those dudes know about airflow!

very informative article eddie its easy to understand & explanes things most articles leave a mystery thanks
cheers ian

Eddie, what about the stuff written by Hugh Hefner or Larry Flint? They know about airflow amd head jobs.

jh27n0b wrote:Eddie, what about the stuff written by Hugh Hefner or Larry Flint? They know about airflow amd head jobs.

Those Men are the two greatest Social Scientists that ever lived! I stand by my comments!

jh27n0b wrote:Eddie, what about the stuff written by Hugh Hefner or Larry Flint? They know about airflow amd head jobs.

Good point!

Gonna order the 440 source heads Wed..I cant wait! gettin itchy! Guess I should take my weekly shower

More info! You guys sick of this yet? http://kb-silvolite.com/article.php "Magnificent Quench" is particularly important!

Ian&MoparMan1972 you guys might be interested in this 'home made' flow bench . Not to mention Dave Vizards excellent tech articles. A lot of this info is really cool. http://www.gofastnews.com/board/technic ... tions.html scroll down and click super cheap flow bench. They use a 'Manometer' sounds porno, lol

cheers for that eddie but i had already checked it out i printed it all off so i can read it at my leasure but thanks anyway
cheers ian

Cool Ian, you're a good fab man, I bet you could build the bench with some careful thought. I think the manometer might cost some money but MoparMan1972 had some great ideas and maybe the surplus military/industrial tooling sources might help get one for a decent price. Here are the deck blueprints. Handy info to have for the machine shop and vital for blueprinting the surface area or if you want to make your own deck/cylinder head plate. The 'Pros' are now using cylinder head plates to cut valve seats that are perfectly concentritic when the head is bolted on the deck.

Sometimes, I wish I'd stayed with machining and access to the shop benefits. These kind of projects would be such fun to futher advance the skills.

thanks for thatdiagram eddie im sure itll come in handy so ive saved it for when the time comes
ive managed to get a couple of vacumn cleaners 1 heavy duty & 2 std duty so they should provide the vacumn i need without great expense my son inlaws father is a cbinet maker so i think ill have a chat to him about using his work shop to build it but ill keep scrounging for now till ive got the required parts
cheers ian

ianandjess wrote:thanks for thatdiagram eddie im sure itll come in handy so ive saved it for when the time comes
ive managed to get a couple of vacumn cleaners 1 heavy duty & 2 std duty so they should provide the vacumn i need without great expense my son inlaws father is a cbinet maker so i think ill have a chat to him about using his work shop to build it but ill keep scrounging for now till ive got the required parts
cheers ian

Sounds great Ian, keep us posted on your progress.

You would only want to flow 1 cylinder at a time on the bench, so I hope you are just using the deck blueprints for the 1 adaptor you will make.

And that's great that you're actually building one! We'll know when you get it finished, because everyone will lose contact with you for a few weeks!