I would like to see a similar review of the AFR 185 ford heads. That being said, thank you for all this awesome information!

Thank you David for caring enough to want to pass on your knowledge to others!! I thoroughly enjoy all of your videos!!!

Thanks DV. Good to get an insight on these heads as a bolt on option rather than messing with old heads. Backyard builder here, all advice is good from your years of knowledge.

The knowledge this man puts out is gold. Thanks for the hard work you put into this

I'd like to see a comparison against the Trick Flow 11r heads.

Wow.. That is some impressive information and impressive HP numbers for pump gas. Am amazed at what is still possible with new tech applied to these old style engines. Thank you David for all you do to teach us..

Yet another excellent session of valuable information. Thank you

For the mere price tag these are Awesome heads for any small c.i. SBF. As they out perform many other's that cost much more. I tell my customers all the time Bigger isn't always better.... Thanks David for sharing your wealth of knowledge!

Thank you for your honesty, expertise and the benefit of your research and experience which is truly invaluable

When is this book going to be available Mr. Vizard?

Thanks for the awesome video. And more importantly the information. You can’t find knowledge like this anywhere. This information and building tech is what i’ve always looked for. Thanks again

Nice to see a product that lives up to expectations. Thanks for the time and effort you put into these videos. I have some questions on porting. When we build an engine, with care, we do our utmost to get the piston and rod weights equal and we CC the chambers to get them equal etc. When porting what is our goal? Do we want to get the highest flow numbers from each individual port or should we try to equalize them as much as possible? When we put a manifold on then we will have unequal runner lengths. Would it be beneficial to have more flow, as measured on the flow bench, to the front and rear cylinders to compensate for the different runner lengths?

Awesome video David! Just what I've been looking for. Thank you!

The rough surface has the effect of shark skin. A bad heart attack wiped out a lot of my memory, but it it has to do something with the laminar air flow. They experimented with airplane wing surfaces and found there was less wind restriction but the manufacturing process was complex. My question is that since we know a lot more now than 20 years ago, why aren't manufacturers just manufacturing heads with all these features?? It wouldn't cost any more during the manufacture to include these features.

Great information and love watching your videos. I am hooked. Always followed you in the 80's with cylinder head porting on mini's . @ 18:26 you said thick line was AFR 165 and thin was your E7TE which should of been the other way round. As previous plot was just showing AFR 165 at flow 202 for the exhaust.

I'm a Chevy guy but I like it. SBF with these in a Fiero? I think it would be lighter; I think !!

According to Darin Morgan golf ball dimples are far to regular to do any good. He makes his ports very rough with the help of a burr with bent stem. He said that the heads look so ugly when hes done so he probably couldnt sell them. But it makes power on the race track. The runners should have this shape from a few inches above the injectors and down into the heads. Im sure there are a few particulars concerning the exact way he does it.

The stories are a bonus! That's in reference to you saying thank you for putting up with my stories all of them. The the stories add educational, information, and entertainment value. They provide us a glimpse in the past. What can I say about your videos overall? Wow, excellent, wow. I think that pretty much sums it up I can throw some other adjectives in there. My dad race Flathead 8s way back in his day. He would tweak at 2:35 or 292 inline 6 occasionally. But what I grew up on was thrifty. . No complaints I kind of miss those days. I've messed with non-thrifty engines as my dad would have called them. His philosophy was there's no use being in a hurry to get there because you may not get there at all. I pass on that same thing. Discourage what seems to be in our blood for racing. Anyway that doesn't mean I don't enjoy the videos about the type of engines that you build. I just get to be the kid looking in the window of the homemade candy shop with 20 bucks in my pocket enough to get me 50 cavities. But my mom says you can't go in there. I hope you like that metaphor story. Although I've been itching to build something for the quarter mile again. Have you ever noticed a lot of people especially kids they don't listen to what you say they watch what you do. Hence the reason discouraging the racing. Bunch of videos man they are excellent Uncle Tony's garage channel fantastic thing he's done turning us on to you. And this Andy guy I got to go back in your videos and find out his channel. What you said about 330 cubes makes sense. The 327 has always been my favorite engine. Thanks again. I'm on the road quite a bit so I'm saving up your videos for when the snow and ice hits the ground

David, can you go over in details: SPACERS and dual plane manifolds, etc

ANOTHER TOP NOTCH VIDEO, THANK YOU DAVID

What are the qualities that make a head less octane sensitive?

Looking at their web site it's interesting that the 165 and 185 are CARB legal, even though they won't work with stock pistons. I'm surprised that it's possible to get CARB approval while requiring a swap of other parts.

Good hp for a 600 lift 107 lsa 240 duration @ 50 cam

Great data! "Before you can manage it you first have to measure it." This has been my motto for decades. Or at least one of them. Another is "There is no replacement for displacement." What irritates me, and maybe I am just being a bit of a jerk, but people use the term Ft/Lb of torque for linear force. Linear force is Lb-F - Pounds Force. Ft/Lb is rotational torque. Pounds force per foot from center of the radius. For smaller measurements, there is inch pounds and inch ounces.

Love the side tracks story's, real world

Looking forward to part 2, are you going to have it out soon?

Hello David. Great video and thank you for uploading it. Was wondering if you have ever tested the Higgins SBF head from Australia? Have herd great reports of them. Cheers from oz 👍🥃🇦🇺

I always enjoy your videos and stories too! DV do you use the same motor oil in all your engines or do you use certain oils with certain engines? What spark plugs are you using for this build? Thanks! 🏁

Is the camshaft/engine build software available somewhere online or is it just for your personal use?

i watched it twice,i dont want to miss anything.

Tesla turbine surface tension principles are what I suspect is a reason for better performance from the tooling pattern left in the ports.

Great test David... Any chance on a Cleveland style canted valve Trick Flow head test? This would be for a 408 Windsor application

The dimples on a golf ball are what allows you to control the balls flight and keep it in the air. That being if you’re capable of doing it of course😂. Without dimples the ball will fly like the ultimate knuckle ball. Many people might be better off with the knuckleball maybe keep it in play instead of slicing the ball to the next county..

On the 331 what was the cam spec?

Good meat & potatoes stuff. If I had a 5.0 litre Fox body I would be all over these.

Nice

YeeeeeHaaaaw 👍👍😎😎😎

Your the man

PT3.0 🚒 👍

👍👍👍👍

I like what I see.

Wow!! Ford Copied the LS Chevy head.

I note, gleefully, that you, a world respected and accomplished engineer, freely refer to an engine as a "motor". What do you say to those stuffy, pedantic, SELF STYLED "engineers", that huffily insist that "MOTOR only applies to electric..." blah blah blah? I always say, "Motorcycle, motorhome, motorboat, motor oil, motor racing, and Dept of Motor Vehicles. Shut up." 🤣

From what I read polishing intake ports on the street kills mpg. In drag racing the motor isn't sitting idle for very long. The video showed that with the polished intake ports were "wet" and was diminishing atomization. In racing applications this doesn't occur. Last point this is my actual birth name whether you believe it or not. Also I run from no one. ᏺꭴ ꭽꭵꭱ ꮓ ꮀꮓr.