Rockers Part 3

[@immanutt4442]

I have learned more from your videos than all the big block Chevy books I have read . Thank you so much for sharing your lifetime of vast information on engine building . Steve you put the finesse on teaching .

[@josh22886]

I always look forward to these videos. Being new into automotive racing and no one in my life into it its nice to have a good place to learn!!!

[@bdubz5150]

You picked a good top notch source to learn from.

[@davidsawyer1599]

Grateful that you are so willing to teach or share your knowledge for free! Thank you Steve.

[@davoupnya3202]

I second that ! Steve is a outstanding engine builder, and a great guy ! A big thank you to him !

[@gregbowen9546]

Good info. Thanks Steve for taking the time to make these vids.

[@wallbawden5511]

Steve i used to be into engines way back in the 60s 70 s not so much now this is a complete eye opener as to the ins and out of the how to do it right now with now parts we use to modify a ship load of old parts machined and must admit we did quite well for what we had i would just love to have one of your engine combos with transmission E C T but I'm on in years now but never to late to learn new tips and tricks but way to late for me fast days gone thanks for the in-depth exportations of all this it's spot on again thank you

[@vehdynam]

Thanks for these technical videos ! They are very much appreciated.

[@Tysonrojas6969]

This is the best engine builder in us ! Hands down

[@mikef-gi2dg]

Wowza.....that hemi geometry is crazy! Good tech!

[@FreakOlds]

Thanks for another great video Steve!

[@jamesbowman4769]

Thanks Steve for the great informational videos you share with all of us

[@duramax78]

From every guy that works in their garage, thanks Steve.

[@Dr_Xyzt]

Stuff like this is good to see on the net. For a long time, I always wondered why we don't see involute tipped rocker arms. Then I did my first cam swap. There was some variation in the casting, which made it apparent that tight tolerances on a solid involute rocker is just an inordinate amount of work compared to a tangential roller rocker with a centered arc.

[@jglennson2591]

Thanks for great info. Really educational videos👍🤠

[@floridanick]

Thanks for the great videos

[@danielsmith-ze3wy]

good morning Steve thanks for video

[@tobbystransmissions6046]

Awesome tech.

[@bobqzzi]

Terrific stuff as usual

[@sikm8sikttv6]

awesome videos. one question i have. lsx with solid roller and over 800lift. the roller tips on the rocker keep burning(siezing and start to turn blue). they are a oil feed thru type rocker. not sure if comp or t&d. any ideas? thanks

[@1gofastboat327]

You rock Steve , Do you build any nasty boat momos.

[@billyjunks]

A Unicam setup is best of both worlds, direct intake valve control like DOHC and rocker arms for the exhaust not to mention a small enough heads for easy packaging. Maybe you can make one for SMX and see if anyone is interested.

[@kellymckinnon1709]

Hey Steve. Loving these tech videos. What Hemi head is that? I'm having a Hemi built in Canada from Tim at For Hemis Only and these heads look amazing 👌🏽

[@MichaelBrown-um8qc]

Gees you make me want to build engines again 🤔😊 906 chrysler 383s would wear out the guides to fast 7200 & up . Just because of the old block & tackle shaft style . "Shimming" them wasn't fun. Lucky none blew up.

[@matthewmccormick2417]

One great motor i love is the SOHC. Never see any builders really do anything with them. only flaw they had was that long chain but was taken care of by gear drive system. Maybe one day you can tell me your thoughts

[@ejgrant5191]

There are so many so called "Experts" on the Internet about Rocker Geometry.....I agree minimum sweep on the valve stem is most optimal.....There are some IDIOTS who talk about "mid lift" geometry optimization at the expense of everything else....I always wondered how long some of their builds keep a set of valve guides with all the poor patterns I see in their builds. Great video👍

[@tools6106]

Could you make the roller tip non-concentric so you could move it in and out with a spline drip shaft? It seems to me this would make adjustments much simpler on the top end!?!?!? Not an engineer, but I am pretty good in the geometry!

[@arielxaber6637]

I really want to know more about that hemi head

[@danielfmyers]

So to move your contact patch inward, you would lower the fulcrum point. Would you prefer to machine the rocker bar channels, or shave the bottom of the rocker assembly cradle?

[@jrdmotorsports9718]

You can run lash caps, lengthen the valve, mill the stand, or mill the pad on the head. Just a few ways to skin that cat. Never recommend ball milling the shaft stand.

[@approachingtarget.4503]

Does the ratio change slightly if you have to raise or lower the pivot point? Because of the sweep changes? More downward movement then sweep to the in side.

[@jrdmotorsports9718]

If the geometry is that far off, the effective ratio, not actual ratio, will alter it slightly. It's just a fulcrum.

[@Nobody-ld7mk]

Radius of an "Arch"

[@bcbloc02]

If it starts at max arc and comes in aren't you getting the most from your rocker ratio by being the fastest off the seat? You could probably trim a few degrees duration off the cam and keep the same top end versus a setup that will be slow off the seat.

[@jrdmotorsports9718]

You don't need to change the entire top end after a lobe profile swap. And by decreasing duration, keeping the same lift, makes the ramp, aka: valve speed, faster. Not slower. Optimally, you only need the rocker to move as minimal as possible, across the center of the valve, or as close to it as you can get it. Faster ramps don't change the arc, they give valve speed. Rocker should have very little movement when set up correctly.

[@desertrat8322]

Awesome video Steve !!! Question for you , on a gen 1 sbc are Crane Gold race roller rockers a good set up . I've got a 600 inch Hydraulic roller cam in a 427sbc

[@jrdmotorsports9718]

They are ok. I prefer Scorpion.

[@Deuce1550]

I'm using crane gold's on my Holden 355” for about 10years and have no complaints. HFT .490 lift from memory.

[@jrdmotorsports9718]

@@Deuce1550 Nothing wrong with them. Just a preference. However at .490" lift on a flat tappet stick, any rocker will live. Put some abuse behind some parts and you'll see what brands start to shine.

[@Deuce1550]

@@jrdmotorsports9718 I can't disagree with that. On my next rebuild it will go to .550ish lift, but again it is the 600+ where things matter more. Have you seen a crane gold break before? By your username I guess you are a shop that builds a few so gets good 1st hand experience?

[@jamesfackenthal]

You were checking the valve Sweep With a bare valve tip . Wouldn't using a lash cap Do the same thing in relation to Moving Sweep farther back Towards or just over the valve center ? And the lash cap would also protect The valve tip

[@jrdmotorsports9718]

Yes. It just depends on if the setup calls for a cap. It's one way to cheat it if you need to move the rocker back a little. Some builders don't like them. Mandatory for high end stuff with titanium valves. I use them often, and for other reasons.

[@michaelreeves7758]

Who's hemi Head is that ? Noonan ?

[@timtaylor6147]

Steve How far away are you from testing Free-valve tech That shit looks promisin g

[@thomasward4505]

I'm a rocker arm with a fixed stand you didn't really say how to change the height of the stand, I guess you could shim it to raise it but how do you lower it?

[@zz7qvl]

Bridgeport mill the base of the stand

[@TurboJailer]

I would love to see a SMX engine with a Koenigsegg freevavle setup on it. What a killer combination that would be. Not sure the cost would be worth it though.

[@chadj8349]

How much lift do you lose on a cam due to deflection?

[@jrdmotorsports9718]

It varies, depending on setup.

[@robwigglezz944]

This video rocks..... *Crickets

[@tylermcintyre5177]

Pushrod just changes the degree of the sweep/pivot

[@jrdmotorsports9718]

With a stud rocker where you are relying on the pushrod for geometry. Not in a shaft rocker.

[@tylermcintyre5177]

Its like when a basketball player stops dribbling but can still pivot on one foot. Thats exactly what the rocker does. Hopefully in a controlled motion.

[@patrickwendling6759]

USA 🇺🇸 USA 🇺🇸 USA 🇺🇸 USA 🇺🇸

[@Damon-fj8jl]

2019hp

[@BucketList23]

Great explanation, however you didn’t show or explain the actual machining process.

[@nadronnocojr]

We’re not worthy …………we’re not worthy ……….we’re not worthy …………

[@TravisAndrew1]

DOHC FTW