As I wait on my PDValve kit from RTS Tooling...manufacturing delays have set back shipment althought Rick has assured me that my base kit will ship this week....I continue testing and developing....
Low to mid lift flow levels remain virtually the same however flow above .700" continues to pick up as work with chamber and port shape and port velocities continue.
At .700" the port flows right around 400...by .800" flow is in 435 range...by .900" is right around the low 450's and near 1.00" the flow is in the low to mid 460's
While I understand that most racers will never require flow at these levels(both cfm and inches of lift) my objective is to see just how far I can push the port while maintaining the factory parameters ie. no welding, changing valve angle, moving guides etc.
The port continues to maintain a volume right of around 300cc and has a calculated velocity of around 325-335fps.
I am looking forward to later in the week when I can try the PDValve system and hopefully will learn more about what is going on in the area of the valve and hope that may shed some light on where more improvements can be made.....

I for one look forward to your posts and results. I have a set of W9's that need port work. They are currently bare NIB. Jim

Thanks Jim....keep in mind that this is still a 'test' mule and I am not sure how the design will transfer to a working port....as it stands now this port has been under 'developement' for two years....it has seen countless redesigns, hours under the grinder, trips to the flowbench and lots of clay......I am contemplating the next step of transferring to another hole and get a 'hard' design...no clay....to see how it copies.....

Then we just need some one with a Rottler machine and some castings

That we do!.....I have some untouched 9's.....but I know someone who has 2 sets of as cast 8's.....which could probably go even a little more......

....and said guy knows someone with a Rottler.......

someone I know?
I have heard that someone keeps his castings under his bed

I can't think of a better place!....

when you are done with it,, send the head to dwayne porter to validate your numbers,, they are insane


good job

thanks!
that is the tough part...I am sure anyone who does this for a living or a hobby is a bit reluctant to send something they have dedicated almost 3 years of their life to off to someone else to scrutinize!
Once I get a working port that I am content with I have a local shop that has a 600 with Flowcomm on which I had backed up some earlier designs that I plan on taking it back to for verification.

Just wondering how much would this type of deal would cost if someone had new w9 heads?

hahaha...WELL...I have been working on this developing this one hole since back in 2010....the first flow test was 9-10-2010 and the port flowed right around 380...i have actually thousands of hours in this port and that still does not guarantee that it will make power even though it flows a lot...I would be affraid to charge someone a whole bunch of money to get their heads done and then the engine is a dog!
Until I can verify that the heads will make power I would prefer to keep them to myself.....that is the main reason I do this anyway...I enjoy the chase...trying to figure out what and why about the airflow in the port....velocity is great!...flow is great! the chamber is small and seems as though it should be efficient but until a whole set is done and tested...intake will affect airflow as well...still waiting on mine then a whole other set of tests will need to take place....it cannot be said if they will make 1100 or 500.......time will tell...THAT being said....early a.m. test today has port VERY near 470cfm albeit around 1.000" of lift.....

my guess is that youll take your 470cfm port and it will flow 410-420 when someone verifies it

you need to send it to dwayne and have him post the results

Well my 380cfm port flowed 380 on my bench and someone else's.....I knew there would be doubters.....but I can make it flow 410 in my sleep......thanks for expressing your opinion.....

It flows just under 79% of range six(verified on my bench to be 592 @ @25" or using a .997 correction to obtain cfm capability at 28" would be 590......79% of 590.......you do the math.....)again.....thanks for your opinion....

I just checked out your website...I see that you have capability to digitize and cnc....so it is possible that you may end up seeing my head anyway. I have been looking to find someone with these capabilities that would be interested in doing other than their in house work. Seems as though most people with these machines either have a backlog of customers or just arent interested in doing the job for someone on a one-off level....or if they do the price is ridiculous. As I mentioned...if you have been folloeing this thread...I have been working on this design for over two years..I have had ups and downs....initial test in 2010 was around 380...I was hoping for 400.....I kept setting small goals and when I would reach them I would push for more....somewhere along that timeline it became a quest to see just how far I could push the port within the factory parameters...I will admit that it is more than just making the hole bigger...comparatively it isn't an overly large port.....as can be proved by the velocity...it has an average calculated velocity of near 335fps.....local measured velocities are much higher...through the throat/valve a little slower....there are some contours within the port that have had LARGE effects on the flow and also its quality....changing said contours can drastically alter both aforementioned and can drop the flow to the range of 430ish.....Thgis is exactly the reason I was trying to find someone to digitize and copy once the port is finished...whenever that may be....I feel that it will be very hard if not impossible to duplicate...at least in some sort of a timely and efficient manner...a whole set of heads by hand.....mind you that only preliminary exhaust work was done so there is a whole other hole that needs research and testing first. So I apologize if I may have been a bit rude...I understand your reluctance...but I have dedicated a large part of my life to this over the course of the last few years..I don't claim to have just sat down with a grinder in hand, spent a few hours making it bigger and achieve 460+ cfm...there have been A LOT of LONG days, late nights, early mornings and WHOLE weekends spent testing, grinding, filling, testing, starting over.......again and again and again....the thumbscrew onthe top of the brand new dial indicator I bought when I started this head has a divot of nearly .125" worn into it from the valve actautor.....So again..I do really respect both your opinion and your reluctance....but it is not without just a small amout annoyance...I hope you can understand.
Respectfully,

Gary

Obviously, there is far more to a race winning head than a peak flow number.....but what you have managed so far is very big. If it works out (and I hope it does), the capabilites are impressive.

An max effort, 4.250 x 4.00, 2x4 at 9500+ should be well over 1100hp.

Good luck with the project.

Well like you said.....there is more to it than just peak flow numbers...but thank you for your support!

Actually being developed for a 2x4 468 on e-85....4.185 4.250.....we will see...