You explained in under 12 minutes what a trade school would take 4 days. I hope you realize that you are helping to inspire future machinist and solve the problem of machinist shortage. Thank you.
The information in this guys videos is paramount if you want to build things right, I fought with rocker arm geometry on my last SBC build so much I went shaft mount, pay attention to what he’s saying it’ll save you a huge headache
Not just the how to's but the why's too . The way you put it all together makes perfect sense of what was part voodoo , part kentucky windage , to get right. Thank you.
Awesome video, really explains in detail the mechanics behind the valve train and what to consider for building/rebuilding. Thanks for putting this out. 👍
Thank you Daniel for that detailed explanation! Some customers order their performance rockers, push rods, cam, lifters and just slap the motor together without checking the critical geometry.......
Hey Daniel, Tim here.....i personally like to have the pattern a bit biased twds the intake side...my gurus (for my Pontiacs) have said a bit of bias twds the intake will save guides, as stuff wears.....YES .060, i about the narrowest u'll see.....for MOST , thats fine, i dont like the bias twds the exhaust side.... but sometimes i wonder if it really matters, my guys were sayin small pattern, with the intitial hit, biased twds the intake, will save guides......just my thoughts, GREAT tech....BOY i dig this chanel!!!......once again i'm PROUD of my t-shirts!!!!....PEACE to you sir!!
Hi Daniel, thanks for the follow up video! This how I did my 327 + .040. Mine is closer to the intake side, not much, but a short sweep , not much more than the roller contact, I didn't measure the width! Thanks alot Daniel!!
Crane quick lift rockers are tough they lift quick and go easy over the nose for less valve float but slam closed and bounce as you say all rockers are different \ I've relocated studs and up and backset shafts. narrow is better Speaking of old wrong beliefs i used to think that longer springs are better, now it's springs at almost coil bind - sort of a desmodromic effect. That was before and after home built spintron
@@powellmachineinc3179 when the rockr is perpendicular to the valve it has more acceleration than when on a big angle Those who go for maximum lift where the rocker is closer to perpendicular at max lift get earlier fling plus max guide wear (might be easy on the seating not that that would make up for all the other problems ) cheers
@@jmflournoy386 Rocker is perpendicular at Max Lift ? That would put the rocker tip at almost the stud side of the valve stem at zero lash. The pushrod would be way to short , The valve train wouldnt last at all. No such thing as a " Quick Lift Rocker" . Thats smoke and mirrors.
@@jkdwayne exactly Those that try and maximize their lift end up with the fulcrum low and the rocker perpendicular at high lift) not mid lift). This BS has been like forever as had the "center of the valve tip error"
@@jkdwayne A few more thoughts from the 50's Adjusting trunnion and pushrod for max lift also takes more spring. When we had to run stock springs another reason that the max lift method did not work. This is about the only advantage of the CRANE "quick lift" rocker (or a high trunnion) is that it is easier over the nose, less valve float. All tradeoffs- pick your poison Thanks for the Memories
Very informative. I always thought you have to get the contact in the center of the valve tip. Glad that is not as critical or neccesary. Interesting. Perhaps the roller tip rocker also pushes and pulls less than non roller tip?
It would be nice if the rocker arm manufacturers would publish the dimensions from the center of the roller tip to the center of the trunnion and to the center of the pushrod cup. I had a set of Comp Cams rockers on a set of Trickflow 351C heads and just could not get the pattern even close. I used the recommended Trickflow rockers and it was right on. You could see they were not made the same.
I’m a back yard mechanic with a small mechanical library I put together before computers but am interest in good usable free knowledge if it help you to do it right and on a budget.i greatly enjoy your video’s.how much worry should you have about guides when off center one way or the other and is one better for street versus various types of racing and how much life should you expect from off centered guides assuming they are not on the raved edge?also what could be easily inexpensively used to raise valves minutely if needed?hope this isn’t to much and again thanks for all your info.have more question but get that I’ll be lucky if these are answered.thanks
Not sire how a guide is "off center" ?, off center relative to what? A quality guide sized correctly with proper VT geometry should live a very long time.
I’m talking about how the valve being pushed to one side or the other because of the v tip being pushed out of alignment.cause and affect but just an answer is much appreciated,I know you’re likely busy and I just want correct info. Thanks
Well shoot. I measured for having the contact patch in the middle of the valve tip. It was the only concern. So far so good!!! (BBC, #063 iron oval headed, retrofit roller)
you got lucky check your stripe width it's all tradeoffs but mid lift or min stripe is the best tradeoff if that puts you too near the side of the tip lash caps or change the rocker length , tip the guides, move the studs (like an half inch thread moved over in a mill etc
Can you not change the length of the pushrod because of those racing rules you mentioned in earlier videos? Still wish you would have gone over why you'd like to change the pushrods anyway. Maybe a follow-up video explaining your reasoning is in order? Thanks.
So that is a lot to absorb. My questions is would making the pushrod long bring the pattern closer to center and would that affect the pattern width too? Or am I thinking about this backwards? And thank you for sharing this knowledge!
moving the center as opposed to minimum width is a really bad tradeoff you want the rocker angle "UP" about the same as when "down" otherwise does not wear as well and mechanical problems.. The camgrinder did not design for rockers using the wrong portion of their arc
there are inexpensive kits to relocate mopar shafts mopar shaft location is for near stock lifts, stem lengths changing pushrods only to center stripe terrible idea, breaks parts in high rpm motor and wears in all watch rocker/ retainer interference. for best geometry run cups in the adjusters and ball pushrods that oil through the pushrods and AMC/ Magnum lifters. The rocker adjusters are a weak spot. do not run with adjusters over extended, the break I converted to FORD size adjusters and pushrods (like 50 year ago) with endurance engines
@@LP23D6 tks B3 kits get the best result as the builder has to supply inputs --those that are just shims are mostly just moving the problem Also alloy hard shafts for roller trunnions and industrial hard chrome (triple plated copper, hard nickel, grind, chrome) for bronze bushings or iron. running needles on chrome shafts is a disaster good iron rockers hard to find let rocker arm rebuilders in NOR CAL rebuild them Battleship triples are BVVC on an LA engine
Some of the You Tube videos are pathetic when setting up valve train...they get the rocker arm in the middle alright but the sweep is 3x as wide as what's demonstrated here.
As I watch/hear all these rules -n- exceptions to the rules I can't help but think that most folks in the industry might not show the proper amount of care? Like you hand cranking to give slight marks or pattern on the valve, somehow I've got this image of some unscrupulous actors skipping these steps & I never knew they existed until watching you discuss them. I'd hope that they'd take care of our stuff as if it was their own but I've kinda lost faith like you did in the USPS? Things are looking bad all across society but at least I know where I can get a motor done right. Some will gladly pay for their shite being done correctly but it's like a rare thing? I miss the good ole' days of service where business owners gave a damn. Sorry bout my rant. peace
Good lord can we keep the political mess off the channels we come to enjoy??? I’m right as well but I don’t need to spew it all over the comment section of the videos I watch, keep that mess in house smh making us look bad
