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Makes sense, Never thought about that, always assumed 1/4 mile was where it's at.

You don't use 3rd gear much/@all in 1/8 mile ?

I guesstimated what a larger 2.14" valve's average curtain diameter would be and plugged it in but it only had a slight changed in the square foot curtain area was 0.00157 (from what I guesstimated) vs 2.055" 0.00151. Had a pretty good feeling this was why but now I get it for sure even though...

273/318/383 threads generally get more views, it's pretty straightforward what to do with, 340/360/440 etc...most agree on what to do. Unlike 273/318/383 where a good chunk of peeps will say don't bother, than you got the velocity police saying you can build them but not very much etc.. There's...

Isn't cr mainly do to with cid vs chamber size. (@ tdc, gasket, pin height etc..)

I'm pretty sure they mill some off the main cap parting line to shrink the hole slightly then bore/hone back to original size, I think honing moves it more than boring if I remember right.

Here they compare these 3 cams in a 383 and the small HR gave the power of the larger FT while keeping the duration of the smaller FT 214/ 224FT 231/ 237FT 214/ 224HR https://www.motortrend.com/how-to/camshaft-comparison-testing/ Dyno Results 383 Cam Test SuperFlow 902 Engine Dyno...

From what I understand they make about an average around 5-7 dollars per 1000 views.

Would make sense if was getting millions of views per episode, 10s of thousand not so much.

That 406 seems to be in the same ballpark as any 408 we generally see. Would of been nicer if the 448 and 406 had the same heads.

Maybe some wants a diesel like powerband :)

Same could be said about me :)

I guess that was the point I'm trying to make, any time we talk about heads, carbs etc.. Hysteric's and others will come in about atomization vaporization etc... But generally people are going by what carb cam heads cr cid etc.. Gonna give me the powerband I want not which one is possibly gonna...

I understand what your getting at, my point was more towards Hysteric's seemingly obsession nature with atomization, vaporization etc.. Above any other concerns. Which usually leads to everything got to be smaller. My general point is other than a few basic options the average guy doesn't...

Like there's got to be an atomization range, from what a well tuned average performance engine is, to the bleeding edge of what highly developed multi million dollar race teams are doing vs what an highly competent engine builder can do. And how much R&D would it take to go from what an average...

I get it's critical, but beyond something being severely off, my point/question is the average well tuned engine out there leaving a lot of easiably gain power just laying in wait? Like how well is the average performance engine handling fuel atomization.

What I don't get about this obsession of atomization, is how far off optimal atomization is the average build? Is there really a lot of power to be gain in the average built engine, just waiting for the owner to sort it out and can the average builder really do much about it? And if so is it...

He’s our R&D team :)

I found out if you handle the duties yourself you can save the brokerage fees a lot of shipping companies charge. But it's a bit of work, calling, faxing, going to closest place you can pay duties probably airport.

That would be cool, if it gave a decent increase would be an easy mod the average guy could get done.

I'm definitely no expert but my guess is you'll probably just fall a little short of 500 hp, depends on how important hitting 500 hp is to you ? Is possibly being 25 hp or so short that big of deal to you.

It's only a problem if your goal was 500 hp and or more. Your gonna need a little more flow and or cam/cr. You probably can pick up some cfm with good valve job and a bit of bowl work and maybe some chamber de shrouding some of the head experts can help you there.

Most healthy built street engines seem to make around 1.8 - 1.9 hp per cfm at peak cam lift. 2-2.5 is possible.

That's a 25-35 cfm difference in the meat of the curve .300-.500" probably at least a 50 hp difference on a decent engine. The SM aren't to bad for the level of head they are, like to see more .300" on them though, still probably make a decent 450-475 hp engine depending on the build.

It says the port length for the intake is shorter than exhaust, that doesn't seem right ? 4.50" vs 4.75"