camshaft Lobe index accuracy, let's look at a good example

[@banjojeff57]

I don't know much about cams, but when the fight breaks out, this big feller is with me.

[@PowellCams]

Lol, 💯

[@jeffreybegeman9544]

I am a retired engineer for a Diesel engine company. We were putting an experimental cam in an engine, and it locked up when barred over. It took us awhile to figure it out. The designer had switched the cam lobes for cylinder 2 and cylinder 3 on the drawing and the supplier made it to the print. We kept looking at the cam which looked fine but then it dawned on us that the lobe locations where switched.

[@lollipop84858]

Prove it.

[@johnlangley6449]

Excellent work a true craftsman I want this guy on my team 😅

[@PowellCams]

Thanks 👍

[@robertpittman3299]

Thanks for all your time and effort that goes into these videos. They are very good.

[@PowellCams]

Glad you like them!

[@MrHorseman196]

I love your accent. Makes me feel like im in the Wild West out on the prairie.

[@PowellCams]

Lol, ty

[@blueridgemountainprepper2166]

Another great video, thank you sir

[@PowellCams]

Glad you enjoyed it

[@richard-cf8ce]

Fascinating valve geometry I remember some of it

[@PowellCams]

Glad u enjoyed 😉

[@edsmachine93]

Good example Daniel of how Cams can be off. I have dealt with this for years. Company's tell you that you're checking it wrong. When degreeing cams and nothing lines up with the cam card. I do not have a Cam Dr. You just proved it. I seen that I was un-subscribed to you channel. I never did that. I re subscribed to your channel. Have a great day. 👍

[@PowellCams]

Absolutely 💯

[@lazyhoundracing9621]

That's the problem with mass production. At what point does the manufacturer consider it worn out. Thank you for your time.

[@m4rvinmartian]

You mean at what point does the CUSTOMER consider it worn out. YOU pay for the tools =) They replace the tools based on how much you're willing to pay for the product. If you'd pay $5000 each, there'd be a new tool each time, haha.

[@camshaftcasting1451]

I doubt the cam he is correcting was truly mass produced. For OE cams they will be ground on a Landis CNC grinder or similar, which is far more accurate than this type of machine. In the case of Landis grinders, they also last a very long time without losing accuracy.

[@TheJohndeere466]

On a camshaft for a tractor, they are really long and only have 4 bearing journals. Have you ever ground a cam where you advance the lobes a slight amount as they go towards the back to allow for twist in the cam while running.

[@PowellCams]

@@TheJohndeere466 no

[@TheJohndeere466]

@@PowellCams do you think it would be worth doing

[@PowellCams]

@TheJohndeere466 you would first need to spend about 20-30 grand on a spintron testing to figure out when ,where and how much if any that it's twisting.

[@TheJohndeere466]

@@PowellCams I was thinking maybe machining the block for 2 cam position sensors. Not surr if our data logger would read it though

[@TheJohndeere466]

We could test it on the dyno

[@robertjohnson6719]

All machine work needs to be accurate

[@PowellCams]

@@robertjohnson6719 💯

[@pauljanssen7594]

I've heard they grind some cams advanced in the rear because of can twist ???

[@PowellCams]

Nobody does this

[@jmflournoy386]

@@PowellCams the rear lobes oscilate found on a stroker cam with small base circles to clear the rods, cam timing was seen jumping around could not fix cam but used a crank trigger timing chains in a lind bored block cause the same problem

[@terrysmith8133]

one of your videos you said you don't grind flat tappet cams, it that because the go bad if the right oil is not used?

[@PowellCams]

No, it's because they don't make me any money.

[@codyyoung3078]

When say you used to check all four corners of a motor i assume you mean checking lobe centerlines with a degree wheel?

[@PowellCams]

Correct

[@1crazypj]

Is there a possibility that a dual plane manifold for street use cam could be deliberately off a degree or two due to different flow patterns with different runners? (maybe it's a 'happy accident' in most cases?)

[@PowellCams]

No

[@DJ-yp4kc]

interesting Info...do you mess with Flathead Stuff?.... just askin. and Thank you

[@PowellCams]

Yes, sum

[@josephlawless6013]

I wonder if the index pin is worn on their machine. This could cause the lobes to be all over the place.

[@PowellCams]

Prob the plate more than the pin

[@lollipop84858]

And you're assuming the $15 an hour button pusher operating the grinder even gives a damn about cars and machine instead of just needing a job, and indexed everything in properly... It also assumes they didn't rush it to get out to lunch... And also that their QC department are competent ... And that their bean counters care about anything more than the bottom line

[@ericsmcmahan]

Daniel Powell, do you ever use a dial indicator to try to dial in a cam lobe or is that too much trouble to try to do?

[@PowellCams]

@@ericsmcmahan yes, I show that in several videos

[@pete540Z]

I'm rebuilding a Callaway SuperNatural Marine 383 (stroked Gen II LT1 SBC) that a friend has in his 1993 Malibu Corvette Ski boat. (They only made 150 of these). Callaway put a cam in it that's a proprietary grind. It's a bit rusty (don't ask) and I was wondering about sending it in to have it reground. If you use the cam doctor, I imagine that you'd then look at your profile lobes and be able to find one that's close. Do you ever grind custom profiles? How much would that cost if it a new profile plate were needed to be made?

[@PowellCams]

Just regrind 170, make new masters of your lobes, add 250.00

[@AntalopeAUT]

@@PowellCams Holy connoly, that´s non-shocking at all, considering that you´ll have that master plate for as long as you have storage space or need it . Colour me impressed with that low price .

[@jmflournoy386]

@@PowellCams there are more modern lobes since 93 no telling how old that master was

[@PowellCams]

@@jmflournoy386 no doubt, but I'll whatever the customer wants

[@m4rvinmartian]

*0:01** Congrats... your drawl was so THICK, I thought I was on an Aussie channel for a couple seconds. Lol.*

[@PowellCams]

Lol

[@SirHackaL0t.]

Reminded me of Forrest Gump. Great to hear.

[@scottvantassel2212]

could be a disaster if you run a tight PV clearance and you only checked cylinder #1.

[@PowellCams]

Yep

[@BigMACK1868]

You said dead nuts. That is very strange because I remember saying that in Vermont back in the 70s. I would like to know the origin of dead nuts. Because I know exactly what you're talking about because I've been there.

[@PowellCams]

Archaic expression, used in many trades to mean 'spot on', or absolutely accurate. It originates from the times when machinsts machines were set with a set of nuts, on a fine threaded screw inside the machine which controled it's movements to and froe. The nut would be set at absolute zero, or the stop, or limit of the machine. When the nut was tightened, and the zero set, it would be considered a dead nut. I know that part was accurate, my machine was dead nuts on!

[@georgedreisch2662]

Wondering how y’all determine what the lobe pattern actually is to pick the appropriate lobe pattern plate. I’m guessing going from manufacturer’s specs alone would cause some got ya’s, same as lobe phasing, like y’all shown here.

[@PowellCams]

In the cam doctor

[@Charles-lane277]

Well i guess uneven camshafts causes unsynchronized firing of the engine pistons.

[@PowellCams]

Definitely can cause cylinder pressure differences

[@kevinmoore342]

What you're doing wrong is you're not setting it up on the equine index for the hasenpfeffer Megasuit. A camshaft torque plate would resolve that problem Or you need to have the spherical offset of the radius diameter.😂😂😂.

[@PowellCams]

You are exactly correct 👏

[@jmflournoy386]

@@PowellCams lmfao

[@kevinmoore342]

Just trying to get ahead of all the keyboard warriors or experts before they do Because it's funny

[@PowellCams]

Lol