Thanks for that! I'm glad you showed how to do this without checker springs, and just using the actual valve springs. Well explained Sir.
@theiceman42844 жыл бұрын
I believe you are wrong, Where the roller touches the valve stem is where the line should be drawn to (but you can't) Don't believe me? Draw a right angle on a piece of paper, place the Rocker's Trunnion center on the Horizontal line with the Roller tip on the Vertical line at a 45. Sweep the rocker through the arc (I place a small white dot on the side of the roller tip) and see where arc is and you'll notice it is on the Tip of the roller is where the true center of the fulcrum should be. Kind of makes sense it would be at the tip eh?. (at least for my roller rocker)
@KenPaisley2 жыл бұрын
I have a set of older TFS twisted wedge heads on my Corvette. They require different rockers and pushrods for intake and exhaust. The sharpie marker method is exactly what I used to get it right. Good advice and great video explanation.
@rent2ownnz2 жыл бұрын
Great Video, Thanks for taking the time to put this out there... not to much info on this topic. Huge Thanks from New Zealand.
@sacooper8023 жыл бұрын
you need to point out this procedure is at the base of the cam lobe, you also need to point out this includes the head gasket and head is torqued to spec.
@ashqelon72674 жыл бұрын
Very well done! I learned something here and will now always have it.
@Ford351c8 ай бұрын
This is the best/ easiest to follow video on rocker arm geometry I have seen yet! Great explanation! Thanks for taking the time to make the video.
@user-Betty_white935 жыл бұрын
That was great info helped me out alot. All my questions are answerd
@ashqelon72674 жыл бұрын
This was Very good explanation, thank you. I do plan to incorporate this method in my procedure on my engine !
@ws678ta5 жыл бұрын
Hey thanks for a great and informative clip! I will be looking for more.....
@henryoddsball21643 жыл бұрын
Great video! Thank you very much for making it
@mikecondoluci534 жыл бұрын
GREAT VIDEO , TWO THUMBS UP
@ApostleDavids8w6 жыл бұрын
Sweet thanks for the help. I have a 8.1 I'm working on
@tnoutlaw733 жыл бұрын
very very important part of building that the average everyday person dont know about. thank you sir for this very detailed set up video.
@blubu683 жыл бұрын
Bro nice vid, love the powerfist dial indicator, I have the same one it must be a Canadian thing :)
@arthurn9237 Жыл бұрын
SIR WITH ALL DUE RESPECT IT'S NOT TRINYN ITS LIKE ONION TRUNYUN TRUYON LIKE ONION ALL THE BEST AND THANX FOR YOUR EXPLANATION ON ANGLES 👍👍😉
@andrewachholz79224 жыл бұрын
Very helpful!
@easytopleez334 жыл бұрын
Looks good!!
@uncletomsgarage4 жыл бұрын
Good job. Thank you.
@robertfernald75175 жыл бұрын
Thanks for the info
@user-zu2ed6ye5w4 ай бұрын
I learned something today to back up my method !😊
@yafois9886 ай бұрын
The proper method isn't primarily a "BULLSEYE" center stem pattern, but the minimum RA from/back ARC swing movement. That will translate to the most full transfer to linear vlv movement.
@johnnyb78254 жыл бұрын
Thank You Sir!
@syedenam79932 жыл бұрын
Really a good explanation 🌹
@henryjon45able6 жыл бұрын
Very good methodology tho
@danonoveh81149 ай бұрын
Looks right to me, i learned the same procedure many moons ago, it works every time,👍🏻💯
@jameswyche3136 Жыл бұрын
Excellent method
@vg23air2 ай бұрын
go to lowes and get a laser that shoots the + dual lines and use that to check the 90 degrees, much better than a sharpie, on line on the valve stem, one line for the rocker
@inscoredbz3 жыл бұрын
I did mine with the mid lift method, but the roller is out on the exhaust side closer to the edge. It's a sbc with a hydraulic roller and + .100" valves. If I put the sweep in the center, the patern is about .125" wide. With it out about 3/4 of the way out, it's only around .050" wide. I haven't fired it up yet, but I'm thinking of putting lash caps on it just to be safe. Got any advice? Scorpion 1.5 rockers btw.
@johnmartinez4381 Жыл бұрын
The caps lock and exclamation point make me very excited about this
@donovankennebeck22863 жыл бұрын
Needing to find pushrod length for my build, the cam I installed has different lift for intake and exhaust so for proper geometry I should run different length pushrods?
@nashvilleoutlaw5 жыл бұрын
I have an idea... once you have your first line. There should be some kind of simple math that would allow you to calculate the angle to make a 90° at full closed. I'm sure it would change depending on cam lift :/ If that is possible though. all you would need is one of those cheap angle finders and mark your closed line off of the smooth edge of some masking tape. Then use the smooth edge of the tape as the line in the video and not even need to make a mark on the rocker.
@DaveIrish669 ай бұрын
If you have no idea of the camshaft specs , how do you measure the lift? Do you measure the travel of the valve spring?
@bradclayton29122 жыл бұрын
When working with a hydraulic lifter is it still necessary to use a solid lifter for this method?
@ryanwinkelman17816 жыл бұрын
You are a genius. What is that guage that's measuring how far down the spring is going called? I should get one of those and try this method. I'm using pedastal non adjustable rockers though, but I'm assuming I could accomplish the same thing with shims? I don't know....I'm just trying to do a GT40P head swap on my mustang with an explorer intake and custom cam. Nothing too major, but I want to do it right the first time.
@Stainlessslayer6 жыл бұрын
Ryan Winkelman it's a dial indicator
@mulespur48066 жыл бұрын
don't seem to be enough threads on that nut/bolt to hold it 5 turns and that's it dang the nut will come off half way down the track
@michaeleisen54455 ай бұрын
Interesting
@VGHCX2 жыл бұрын
Is rocker arm ratio the same as mechanical advantage? If no, how are they different?
@michaelcouey13832 жыл бұрын
What do you do when you try this method and don't have enough threads sticking through the pivot shaft to even begin to thread on the nut?
@aldoladrondeguevara72596 жыл бұрын
this is BY FAR the best video I've seen. but I have a question since I'm learning. do you not need some softer springs to do this?? I've seen it on some other videos and hears it before. thanks keep it coming !!
@scottfoxwell91125 жыл бұрын
You don't need soft springs. In fact, you don't need to compress the springs at all. That's one of the real benefits of this method, is you can do it in the car without turning the motor over. Just make sure the lifter is o the base circle, get your initial 90* relationship and it's just math from there.
@donovankennebeck22863 жыл бұрын
@@scottfoxwell9112 had a couple questions after seeing your video on this was wondering if you could answer them?
@SmokedTirez2 жыл бұрын
Although it helps in aiding longevity to the checker tool and the amount of re-uses it will give if the checker tool is of good quality you can compress a single spring w/damper without removing them to test.. I do the check with the regular pushrod I have on hand and a dial indicator..I get the valve to half lift and see how much it takes to get the fulcrum to roller tip centerline to 90* with the valve subtract the two and thats how much longer of a pushrod I'll need and vice versa.......Been doing it that way over 35yrs. and never a problem..
@royshideler6 жыл бұрын
All good info, where can I get a mag base like yours? Mine won't stay put on my aluminum head like yours does.
@dennishensley11505 жыл бұрын
Got sum guerrilia gloo, bro!
@charlesbikely25116 жыл бұрын
Ti retainers. Great investment.
@rockerarm91856 жыл бұрын
good
@bradminor746 Жыл бұрын
Who is the best engine builder in the world who taught you this just asking
@cliffcampbell88274 жыл бұрын
Are high quality roller rocker arms best for all automotive gasoline piston/cylinder engines (from the humble little 4 banger all the way up to those monster V-12's and beyond)? If not, couldyou cite examples of where would rollers work best?
@KingJT804 жыл бұрын
You want the best? Shaft mounted rockers Be prepared to pay $$$ like 800 plus for the nicer ones or more
@C10chevy85 Жыл бұрын
I tried using this method, but in order to establish the 90 degree angle (with valve closed) and getting the mid lift, I need to have longer rocker studs. What am I doing wrong?
@ronaldmanwaring2631 Жыл бұрын
I have a Chevy 01 cavalier 2.2. 134l that I have built for oval track and would like to put roller rockers on but have no idea what components to use I would have to tap the head for studs. I believe the ratio is 1.5 stock camshaft with hydraulic lifters. It has pedestal mount rockers now but the bolts are very light duty and I am running 6500# valve springs. Just rotating the motor broke one of the studs off. I believe they have to be self aligning rockers. I seen this motor with roller rockers so I know it can be done I just don't know what parts I need to accomplish what I want to do, any help would be greatly appreciated,thx
@robertheymann5906 Жыл бұрын
Thx
@chevroletbelair1 Жыл бұрын
I'm trying you're method but i have Howard's link bar lifters(ford 289) When you spin the motor to check 45 degrees angle at half lift my plunjer in the hydraulic lifter will collapse .also when checking valve tip mark. Doesn't it give you a false reading? Thanks
@Stainlessslayer6 жыл бұрын
This method is great unless your rocker stud is too short to achieve the first 90° setting.
@scottfoxwell91125 жыл бұрын
You can put a washer or two under the stud just for measuring purposes. If the stud is too short for the initial 90* setting, it usually means you need longer studs.
@mikedunn98125 жыл бұрын
good video, But I have both 1.5 & 1.6 rockers, where & how do I plug the math into the equation ? Or does 1/2 @ 90 still apply?
@ericnova725 жыл бұрын
1/2 @ 90°, regardless of rocker ratio.
@brendavanorden95502 жыл бұрын
You didn't mention if this was solid or hyd roller. Nor sis you subtract for the lash or have a light spring for hyd setups. Pooor t best.
@kgooch695 жыл бұрын
I take this measurement was done with the cam lobe on its base circle ?
@19jody724 жыл бұрын
Doesn't look centered to me in this video
@marlinmaveric6 жыл бұрын
Good info.
@micthegreasemonkey29184 жыл бұрын
Thought it wasnt advisable to turn the engine over with pr checker installed.
@KingJT804 жыл бұрын
Irs probably a solid roller You do it one if two ways You either buy a solid lifter and use you regular springs or you buy checking springs and use the exact lifter youre gonna use If you use regular springs then yes you would be right about not truning it over if it has a hydralic lifter
@jeffreydurham53423 жыл бұрын
That was a high quality checker. One of the cheap ones would have failed.
@GetaDomTune6 жыл бұрын
great method, but clearly not at 90*.
@nitrousshovelhead5 жыл бұрын
and the dial indicator is not parallel to the valve.
@threeaxis3594 жыл бұрын
@@nitrousshovelhead I notice the same thing but I think he was focusing more on the method then being precise either way nice method.
@bradminor746 Жыл бұрын
@threeaxis359 but every home youtube engine builder is gonna do this way. Rewind play Rewind play. Damnit
@chucktaylorsaldivar556411 ай бұрын
570 lift 285000 everyone knows where you determine those numbers from! Right
@rchoper214 жыл бұрын
I had an engine built 20 years ago. The pushrods were too long and the rocker rolled off the edge of the valve tip and ruined the valves . Now I know how to find the right pushrod length but what about the lash? Doesnt that change the geometry? I'm running a hydraulic roller. 0 lash then a half turn preload is my understanding. Is it that the lash won't make enough of a difference to throw the geometry off? I had a head gasket problem. Can this be caused by the incomplete lift of the valves and getting a lean condition that blew the head gasket. It's a 347 vortec V1 s trim with ported first gen twist wedge.
@acpros33185 жыл бұрын
I see you bought the optional aluminum magnet for your dial indicator
@19jody724 жыл бұрын
How do you determine that is a 90*?
@KingJT804 жыл бұрын
He's looking at the valve stem vs the line he drew on the rocker If you look at it theyre 90 degrees to each other and the roller ia centered over the top of the vakve stem
@19jody724 жыл бұрын
@@KingJT80 fixing to try to get the right measurements on my trick flow headed 302 with polly locks.. any good suggestions to try?
@KingJT804 жыл бұрын
@@19jody72 do you have a checking pushrod? The comp cams magnum ones are the ones most people use because its marked with measurements so you know exactly what size it is
@19jody724 жыл бұрын
@@KingJT80 yes..i ordered one
@KingJT804 жыл бұрын
@@19jody72 sounds like youre on your way
@henryjon45able6 жыл бұрын
Must be solid lifters?
@serracon6 жыл бұрын
Jon H yes i was using solid lifter but the principle still will work with hydraulic half lift 90 degrees is what you should target
@MrElPoderozo15 жыл бұрын
@@serracon Hello Sr.! I was wondering if I could ask you a question. My camshaft is .520 .544 do I make the math from .544 lift? So half lift would be .272? Thank you in advance and thanks for the video.
@jeffreydurham53424 жыл бұрын
@@MrElPoderozo1 To be accurate, you should calculate them separately
@jjmccloud4 жыл бұрын
Good lesson but that $13 tool they make now takes all that work away lol just set it on in place of the rocker and bring pushrod checker up to it and there u go
@KingJT804 жыл бұрын
for Chevy but ford they dont make one
@jeffreydurham53424 жыл бұрын
Those are worthless, different lift cams will need different pushrods on a stud mount setup to achieve 90 degrees at half lift. A shaft rocker setup will need the shaft height set so the rocker is 90 degrees to the valve at half lift.
@KingJT804 жыл бұрын
@@jeffreydurham5342 yeah theres a guy on here who builds racing engines shows that and drawing a centerline through the rocker tip and the roller fulcrum with a sharpie and setting it at 90 then going back and checking it with the method here. If they match its a go
@ercost60 Жыл бұрын
Good video but you drew the wrong line on your rocker arm. The line of action is from the rocker pivot to the roller contact point, not the roller center. The valve only cares about what contacts it, the roller OD.
@19jody724 жыл бұрын
I tried this method on a 302, pedestal mount rockers. ,no.way this worked , nor even close to being a 90
@KingJT804 жыл бұрын
Pedestal mount rockers are non adjustable rockers so no it wouldn't work youre using shins for those