Anyone who is using a Spin Tron is showing people that they are invested in developing their camshaft packages based on concrete data. Great work Brian Tooley Racing.

Thanks man! I really appreciate your desire to learn and improve everybody’s race program! You’re correct about spring pressure one best junkyard motors I ever had was small sbf .600lift solid roller 190 intake runner Only 100lbs on seat! It ran deep in 5.70s to 1/8th

Brian, Great video, one thing I notice and it is the one thing I have done for over 20 years. Fix the saddles on the rocker stands. I have re-machined Jessel, TD, Comp rocker stands so the shaft would sit slightly below the shaft C/L so you take the load off of the hold down bolts. You are the first I have seen do this, great job.

Great video Brian!

Brian I truly appreciate the dedication you have for your products and your customers !

That is amazing. I am more sold on a Truck Norris cam now more than ever.

I never knew about bounce. I learned something today Mr Tooley

amazing information!

Awesome stuff right here!

Fascinating. That’s something that’s overlooked

Super cool! Glad I am running your truck cam, love it

This is why BTR cams are the best

Amazing knowledge here sir. As a mechanic of almost 20 years I just realized I have so much more to learn. Thank you for this information.

Thank you Sir!!!

smart man, seems like he works hard as well

I would love to see a deeper dive into what some of these other components, like rockers and fasteners, do to valve control.

Must be how cam companies such as yourself determine at which point valve float occurs… Awesome information! 👍

Cool stuff, I just did a AFM delete on my 2015 6.2 and used a stock Grind BTR cam. I am beyond pleased, this engine has never run so strong and smooth. If and when I build a LT platform, it will be BTR all the way. Do you guys design cams for Pontiac V8s, 1972 455 HO is my next project. Your R and D is very impressive. 👍👍🏁🏁

Never thought a fastener would change the trace. Wow learned something new!

Incredible craftsmanship

Nice work 😎

WOW my next cam will be from you guys

Great information Brian

Great information 👍 thankou for making the video

That’s pretty awesome information!

Awesome 👌🏻. Thank you 👍🏼

BTR dropping knowledge on a Friday. Love it

Brian Tooley, you are the Einstein of camshaft design. (Hey I just realized that rhymes) Keep the education coming brother!

Impressive.

respect

Brian, how does your shaft system compare to Jesel? And is it a useful modification for high-RPM capable hydraulic roller cams that are going into a stroker Gen V LT like 468 or 480 (or even 500+)?

like your truck norris NSR cam,

Very cool machine!

That truck norris a bad summa

We’re gonna be ordering a couple parts from you for our new 1600hp LS.

Does rocker weight, balance, deflection also play in to the stability?

Take MORE of my money !!

Does your brain hurt Brian?? Awesome insight

I have an LS7 crate engine with 227/242 .591/.590 lift 116 LSA cam which comes installed. I plan to rework the heads. Would a .660 spring kit be too much spring paired to that cam? What spring would be optimal?

I know nothing is perfect, but I've always wondered how accurate Spintron tests are considering the significant lack of gas/chamber pressure dynamics which cannot be recreated. I'm not saying it's not a significant increase in knowledge vs. guessing, but I'd be nervous to put too much stock in it. I'm assuming its results have been compared to operating engines, so I'm probably overthinking it.

Is there any data on how the different ramp angles (from the different cam follower diameter) in GM, Ford and MoPar engines from the '60's and '70's affects any loft occurring? Would the faster ramp of the MoPar cams lead to more loft then the GM cams? (GM > Ford > MoPar for ramp angle steepness)

But the deflection would not occur on an overhead cam engine where the cam lobe itself is regulating the valve. The only pressure point would be the valve guide so as long as the guides are good then the cam would keep the valve from deflecting.

Came here wondering what the hell is a Spintron. Left with a boatload of interesting engine tech.

Wow. Different bounce when using different fasteners. Who’d thought that would happen.

Would like to hear you go more in depth on deflection and how it all affects the loft. Cause my assumption is that the amount of deflection creates stored energy in the components which gets released at the top of the lobe creating the loft. But idk. And I want to know

dang, good one

Assuming you're spinning that thing at ambient temperatures, how closely does that relates to engine operating temperatures?

Thank you Brian for the technical video. I believe there would be performance advantages if the spring pressure was distributed evenly through the valvetrain. Instead of at the end, at the valve. Can small springs be added at the push rod end of the lifters? My engineering mind never stops finding alternative solutions 🧐

Is this based on Smokey's old smoketron?

Would the closing bounce be not as bad with a piston compressing the charge?....really cool tool... thanks for showing us your toys!

So many old Smokey theories' been placed on the trash pile due to the advances in SPIN TRON. The engines I buy for my customers have orders of magnitude better feel than any other because of the spin testing done. They are smoother and more powerful than the OEM stuff by far. I've read that some others have done piston travel laser mapping as well and I sure would like to finally lay the rod ratio argument to rest. Albeit I already know the answer because like everything else in life there is no such thing as the perfect one size fits all for every purpose. Like asking a 22Lr to take down and Elk or 45-70 to leave any trace of meat when hunting squirrel.

Too bad you don’t make any sbf stuff

Wish more of this information was in hotrod magazines and other methods of media. I enjoy seeing custom builds but learning something new is as lucky as finding gold.

How does a spin Tron or vice a versa your development team account for the atmospheric pressure is on each side of the valve with an open chamber? And I guess how much does that affect the valve and its movement?

Wow, who would have thought fasteners would have a difference in that application. I would imagine with the compression of ignition and forced induction that also must have an effect.

Nice. #!!! 😊😊😊

Science, still plenty of fruit to find on ICEs!

How does the *absence* of heat, piston vibration and other combustion effects, affect your valve train measurements?

Hi Mr Tooley, Do you sell complete cam and valve train kits?

So which bolt/stud is the best to use with your shaft rocker kit?

Cool

Gym performance lifters or Johnson link bar hydraulic lifters?

Do you make cams for gen 3 hemi ??

What about cylinder pressure affecting these tests? Especially the exhaust valve? I gather there is none of this without rods/pistons etc!

Mr Brian Tooley, we are building a 92/103 turbo sbe 6.0 ls, rectangle port heads with heavy truck valves, stock rocker arms, really just stock junk. Can you grind us a cam to keep all the heavy parts stable at 8-8500 rpm, so we can just let the turbo make the HP?

cool tool. is it similar to what Katech uses?

Does boost effect bounce?

What is the most important valve event. in valve timing events

And what cam is that Brian 😳

So don’t buy a Texas speed cam, gotcha

I saw Smokey Yunkick speak at the PRI Show in Columbus, OH back in 1994 and he was using (he may have invented it) a Spintron machine to observe the valve train and oil flow characteristics. This was in 1994 fellas…..

This poor Brian guy is going to be disappointed when he learns of my 125 hp Spintron. 😂