Valvetrain - Cams, Pushrods, Rockers, & More (2021 - Episode 24)

In this episode Billy Godbold does an educational session on valvetrains and how low shock technology has become the standard for power and durability across the spectrum of race engines.
He goes through how we were all taught to compare profiles and how we now need to “re-learn” based on the new technology. Along the way he talks about everything from the pros and cons of roller and flat tappet camshafts to the importance of resonance in creating more power.
After Billy’s seminar, he joins Joe Castello and Lake Speed Jr in studio for live Q&A from the audience. Billy also tells a few great stories, including some NHRA insider tricks, and how Jon Kaase once found a way to brag about losing 300 horsepower.
(Originally aired January 8, 2021)
‪@Compcams1976‬ @godboldengineering

[@briankiker8272]

Harold Brookshire All of this years ago. I got one his big block cam's The last one built before he passed away.

[@georgedreisch2662]

Something that seems to be omitted, from not only this one, but, most, if not all, of these presentations, is the dates they took place on. I think dating these relevant, as to subsequent changes in contact information, product introductions / changes, etc..

[@EnginePerformanceExpo]

That's a good point. My bad. I have added the original airing dates to the episodes. (Expo #1 ran from January 7-9 in 2021)

[@dalelockett2619]

Good stuff! If y'all would, please ask Billy this question concerning camshaft design...........For the Ford Modular 3V engines using VCT & CMCV control, are all the NSR, full VCT-compliant camshaft designs ground w\ the intention of the CMCV control being used or are all of them designed w\ the intention of the CMCV control being removed? In all the catalog descriptions nothing is stated to give a definitive answer to this question so I would like to know definitively if removing these CMCV's while using 1 of the NSR, full VCT-compliant camshaft designs, you're giving up some of the low RPM\off idle transient throttle TQ output from losing the improved low RPM intake port airmass velocity\A\F mixing that these CMCV's provide.........? Would like to hear this from the 1 who can give the clearest answer to this question........ My gut says yes due to the description statement "work w\ the stock tune" but I'd like this answered from Mr. Godbold for my peace of mind. Appreciate any info gained. Thanks in advance.

[@bobgyetvai9444]

This reminds me of a inverse flank radius cam ground backwards .

[@jeffwilliams-h5r]

Mike Jones has been doing asymmetric lobes for years.

[@brianlafollette7530]

Fast moving pieces on the chess board

[@flinch622]

Somebody help me please: web page/marketing seems slightly disconnected from development, and I need a decoder ring to contemplate all the 3 letter codes seen around 14:04 - LTQ, LTL, LSF etc. Also, the cam industry seems to have lost its damned mind roughly 5 years ago: web sites are now best suited to sell things requiring a visual [like shoes] and cam cards are buried or vaporized. Cam pictures? Those pretty much all look the same, so the overall concept has a problem. A gentle reminder of what the print [catalog] crowd had a very good handle on in the 80's: browsability, and the use of tables we would now call spreadsheets. Might be arranged by series or engine type, but it was all there at a glance. The E-commerce consultants of big tech appear to be... morons. Billy conveys some great info, but... can't say that CC website backs him up that well.

[@ironmike742]

Why are you cam companies using a wide lobe separation angle? You guys are putting out junk. A Tighter lobe separation angle will make alot more torque and more top end power. I never buy a shelf grind.

[@C6Z_Bob]

Do you really think that you know more about cams than the people who spend day in and day out tweaking cam specs and testing them out on an engine dyno?

[@ironmike742]

@C6Z_Bob I think I know a thing or two. I've been building engines for 30 years.

[@Mike62501]

@@C6Z_Bobright Bob he’s got anther 30 years to learn then he might get it but I don’t think he ever will.

[@C6Z_Bob]

@@ironmike742 I'm sure you do, and you're probably pretty damn good at it. But it's a little bit crazy to think that multiple large LS cam grinders who have access to engine dynos and spintrons don't know as much as you do when it comes to making power with a cam.

[@YouCantSawSawdust]

He explains why at 22:00.

[@rollandsicard1628]

Terminology not defined. Much talk, hard to understand what is being talked about.

[@YouCantSawSawdust]

Please, no analogies about snowmen and snowballs. Just stick to physics and mathematics, please.