Flow Difference Between 5/16 stem valve and 11/32 And SBF Cam Challenge Update

[@jakeblack4095]

You were making my mouth water at the end. I'm a sucker for ice cream, especially good ice cream. Thanks Eric

[@colemanbelcher1589]

Man Eric!!! Another Awesome video!! Soooo much great info on them DS heads!! Top Head Porter information Period!!! Hands Down!! 🙌 mmm. That Ice cream sounds amazing

[@justinschmidt9180]

Thank you much for doing something with a ford ! . Every non chevy video you do i watch immediately. Thanks for the good work.

[@daledavies2334]

An advantage with 5/16" or 8mm valve stems compared to 11/16" is valve weight.

[@JohnPressermustangs]

I really like the gold medal ribbon from basking Robin’s , that stuff is awesome! Now you got me craving some.

[@powellmachineinc]

We're happy to help, any way we can!!

[@roknroy1]

Priceless info!!! Keep teaching me!!!

[@chrisallmond6867]

Very excited for the SBF cam challenge. Allmond Competition has been busy studying valve events "in the basement" and is ready to see just how we stack up against some of the best!

[@patrickmarcello5103]

Thank you for all the work you do!

[@bw3506]

Interesting info on that stem size. Thanks. 👍

[@bobbybelcher6800]

Great content as aiways !

[@jamest.5001]

I have always wondered how plug locations effect power, especially since seeing the LT heads having direct injection ports on the intake side. And the 60's GMC truck, big block V6 engines with the plugs in the intake valley. Made me wonder if the injector port could be modified to hold a sparkplug, if having the spark plug closer to center could would effect power. Or if a normal Chevy head could have the plug moved toward the exhaust a bit and raised on the outside location. To angle it more like a hemi plug. Then have the ground strap indexed for the back to face the intake port. With the plug more in-between the valves. And more in the roof of the chamber. Not that much only .100-.200" movements from the standard location, and angled from the exhaust valve.. it would likely be difficult to cast possibly why it's not been done. With all the CNC equipment available, maybe people will start doing more modifications build custom heads and blocks. Like a big Chevy, with the cam raised enough to allow a more hemi style chamber. With the intake opening away from the intake side cylinder wall, and the exhaust opening to the bore center. With a roughly 10°-15° valve stem angle. The timing cover possibly bolting on the china rail just below the intake or possibly bolting to the intake the top 1-3 bolts. And a timing chain and cover nearly 3" longer. And a wedge engine , how much can the valves be angles to open to the center of the cylinder? Maybe 1.5° each maybe 3° using a shaft style rocker on a removable stand, the lifter designed to hold the pushrod at more of an angle , with a upper and lower guide plate? A guide plate that bolts to the bottom of the head. Maybe use larger diameter lifters. To get a offset lifter with roller cam. And the rocker handling most of the angle. It could be a very interesting engine . It would be easier to just build a overhead cam head for big Chevy. With 3-4 valves per cylinder. Two intake ports . With ultra high ports. That would be in the valve cover of a stock head. Keeping the center cam to drive the timing gears allowing a 1:1 ratio from valley shaft to overhead cams . Possibly use finger followers maybe upscale a Honda k- series head, use two 2.08" intake valves . Two 1.8" exhaust. With a modified flange pattern that can allow a 2.375" primary, maybe a 2"-2.100" cast port, getting 500 cfm through a intake port would be awesome.(imagine the O2 available in the cylinder with 35-40:psi at 100°f intake charge.. a 540cid would think it's over 2000 CID, at sea level non boosted. If it's capable of pulling in that much without boost. A dry ice intercooler, or maybe a bit of nitro! 😮, A billet head with water added, with thick decks . I'm dreaming I know . Over 500-609 cfm even possible? Have an awesome day!

[@patrickmoore1017]

Headed to the dyno in the near future with your 253 CC/2.69 MCSA Dragonslayers.

[@WeingartnerRacing]

Hopefully it does well I have more data on the one that needs shaft rockers than the one that doesn’t

[@davidphillips3953]

What's the hemi scoop? Is it a dyno mill to test some stuff or a customers deal? Carb EFI??

[@68nitrostang]

That 2.81 cross section is nice

[@gordonflash8976]

Great video, though I do not know to much I can appreciate the volume of work you have done here. Can anyone help out a newb here? When someone says "small block ford" are they talking windsor or cleveland? What will they say when referring to the other? Thanks in advance

[@WeingartnerRacing]

This one is windsor

[@joecraine4660]

Most difference I have ever seen between 5/16" stems and either 11/32" or 3/8" stems was 3 or 4 cfm. Weight savings is the only true improvement in most builds.

[@richardprice5978]

but like push-rod's/spring's ( my current build 540ci 4.5inch-stoke that's not done-yet is liquid/hydraulic's systems spring's+rod's/cam as hemi's/D8's historically are $$ for the top-end and or chewy on-parts and im hoping i can R&D/mod to tame-that ) it's worthwhile to keep the stiffness up and or gas-seal and being im playing with 440/hemi-bit's id noted that the people who tried removing LB ( and or cut the brass-upwards for porting-job's and or downward's for retainers/coiling-binding reasons ) beat-up the seat's and or really needed the copper-ally+sodium-filled( oil leak into the head/mushroom on my-plans and moving the stem 8~mm-sized seal/'s on the bottom like how ford did it pre1940's v8's so the brass getting fully-PSI-lubricanted ) to remove the heating and snapped-off headache's do a number on crowns/rod's/block/heads id rather get 90k miles ( in-between freshen-up so for me planed TOB=5 to 9 years and or by that point the rubber's starts going bad ) and or 3k~hours of cycling than a extra 20hp/torque/2~mpg

[@ecc5119]

I don’t port cast iron camshafts.

[@REDZ28won]

Weld the floor with Nikel rod and start gringing.

[@eracingregal]

🔥🔥🔥🔥🔥🔥🔥🔥

[@fbombcamaro434]

With the 40/60, can you get peak power at 7500 with a 434 and do you reach 750hp with it? Or what is the max for these heads on pump fuel vs e85.

[@rolandtamaccio3285]

Gotta watch this later , but been wondering about the stem size for 50 plus years .

[@peskypeet]

In before the thumbnail

[@brianb8489]

Will you smooth out the ports on my cast iron heads?

[@I_like_turtles_67]

He's no superman.

[@frankrizzo2724]

They're probably doing you a favor with that ice cream...

[@bcbloc02]

A 3/8 stem is only like 3% of a 2” port going down to a 1/4” gives you 1.5% more flow area so I would think that would be about the biggest effect you would see from a valve stem change on a 2” or bigger valve. Now on a 1.5 valve I would expect to see a lot bigger effect.

[@arturozarate1752]

Careful with expectations. They'll always let you down.

[@nathanvillarreal7937]

Do u port stock gen 2 lt1 aluminum heads?

[@therory6888]

ANDY’S!!! 👍👍😋😋😋

[@chevyrc3623]

Hey ice cream man that doesn't port cast iron and no super man there you go. Nice heads man I want a ported head from you 1 day lol

[@crd-nz_001]

I have to admit, I fell into the expectations that the 5/16 stem should outflow a 11/32. But, as I hadn't done so, did some math. 5/16 is also 10/32. Which makes the difference between the two 1/32 of an inch. What is worse is, since it is a circle, it takes up 1/64in more on each side of the port. Or, 0.0156in space (15.6tho)

[@daledavies2334]

Flow difference is minimal but the 8mm stem LS valves with the same head size are about 20gm lighter. If your installed height is 1.8" you can also use beehive springs and retainers which are fairly inexpensive.

[@Doug-b4p]

Rockers did u say lgm or elgin?😢

[@WeingartnerRacing]

Lgm

[@Doug-b4p]

Hi eric can u help me with my project,i have ss 1.8 ls rocker arms i want to install on my dna heads is that something u are familiar with and could u give some feedback they are beautiful rockers and would love to use them ,thanks for all your video's oh they are sbc heads

[@WeingartnerRacing]

You should contact who you bought the heads from they should be able to help.

[@jimbob8969]

@@WeingartnerRacing why do you fall for that shit every freaking time? Just let the dipshits talk and move on with life. It makes you seem petty and ignorant.

[@Doug-b4p]

I wonder what low lift flow would be on these dragonslayers if they had a vizard 30degree seat treatment, yourlow lift numbers 75 at 100inch with his additional flow at 100 and 200 coul d be impressive

[@WeingartnerRacing]

I wouldn’t ruin my heads doing that garbage.

[@arturozarate1752]

​@@WeingartnerRacing finally with the best answer.

[@drcolster]

BILLET STEEL ROCKERS.....OR BILLET ALLOY ???

[@WeingartnerRacing]

Billet aluminum

[@drcolster]

@@WeingartnerRacing Unfortunately you said Billet Steel..... So everyone would be on your back for steel rockers.. I'm surprised the 5/16" valve was not lighter, i suppose the test would be to way the same brand valves in 5/16 & 11/32. then weight difference is known.... Good information video.. well done...

[@timleonard86]

Damn those heads are massive better have a blower or 434 stroker of you run them on the street

[@WeingartnerRacing]

No they do fine on the street na