bro there is sooo many guys who don't do it for a living but tell us how to do it and what we did wrong on these comments. When they could be asking questions or learning they are standing on a soap box telling you off lmao
Excellent showings Dave, thanks man! Its really interesting you cover this on these heads. Would love for hpd and 4 pistons to chime in too with all their R&D knowledge through the years seeing what works best for this kind of design, its pretty intricate and unique, some things need to stay secret i guess. Not many cylinder heads have a common exhaust port outlet like this
Great Job Dave. I like your approach on a head like this. The people out there trying to install a bigger valve in a stock seat like these does not work. Not enough seat margin. Thanks for sharing. Take care, Ed.
The "SHORT TURN" with a dry port and 4 valves per cylinder will work better as a "flow over" and flatten the short turn since there is no fuel to turn. The intake pressure and overlap will force air around the valve to 10 degree after TDC and them separate and flow over the short side and (air pressure to speed) straight into bore slamming into the cylinder wall and swirl. The air is pushed and wants to flow to the center of the bore. After all that, the fuel is injected. (living engine)
Another awesome video! 👍 I’d love to see how you flow test the head. Do you do a before and after port job flow test? Or, do you keep porting and flow testing until you get the specific flow numbers you’re looking for? Also, do you flow test to make sure the head is matched between cylinders? I’m coming from the motocross/dirtbike world but it’s still really cool to see how car guys do it too! Keep up the great work. Cheers! 🤙
Excellent video matte! Right now I am looking for a rotary tool mainly the use that I am going to give it is clean rust surfaces and porting car cylinder heads at hobby level at home, opening ducts etc I was going to take dremel 4000 or air die Grinder but my compressor is 12 gallon 3 bhp and doesn't hold up to the job, a friend told me that for the job I want, it has revs but not so much power and it ends up burning, it's better to use a drill or electric grinder tool for that type of job, would you recommend this makita or Any other? The carbides I use to remove metal are 6mm or there would be a lack of power. Regards😊😊
Thanks for the comment about over sized valves I see this often but in my thoughts especially with already shrouded valves Ford modular cylinder heads with 3.5-3.7 bores it seems better to do other things. Like unshroud the stock sized valve to increase flow and hit the other variables to compound the improvements.
I have a set of 2KR Cobra heads which are the precursor to the 05-06 ford Gt super car heads that I need ported. Been scared to send them other places due to no one having a CNC file because of the low availability of them. Also I have the original intake. I know you can do the heads but could you also port match the intake manifold also for me?@@headgames
Excellent porting! Ugly head though. Cast exhaust manifold? Can gains be made with that? I'm sure you made gains porting but is that cast manifold a choke point?
110hp with porting has been advertised on a 670whp motor. Engine made that power at 33psi before porting - made same power at 24psi after porting. At 33psi it made 110hp more. Just got my head ported by a reputable engine builder who specializes in these motors. Hoping for gains of 60 to 80whp on my 566whp setup. Would be happy for anything above 600whp - 620+ would be solid gold on the tiny turbo I'm using 😂 stock cam shafts and stock bottom end. 8000rpm rev limit - should see results next week after new headgasket is broken in.
we do 2 valve heads as well, and try to not go above 90%. And that 91 number is not a flat across the board, works on every head. Some heads we can't touch the throat on the valve job because it will lose. This is an area if you are to small, you know it. Too big, everyone will know it.
@@V8Lenny the tumble can't be taken out of the port. It is how it is designed. And it is boosted, so don't think tumble is a problem. I would think there is other issues there. The part they choke up is for cold start emissions.
