Forced Induction (Part 8): Cam Shaft and Heads Selection with Brian Tooley

[@TravisFabel]

So I just come across this 6-year-old video by chance, and even though it's number eight in a series, I decided I'll just listen to it in the background while working in the garage. So we get a few minutes into this video and I find myself not working on a damn thing in the garage just stopped and staring at the TV. Not that I need to look to hear what they're saying, but because here's somebody answering questions I've had for years... And I realize this is 6 years old now but it makes so much freaking sense from what I've seen from him recently. This is pretty cool info.

[@TheTuningSchool]

Thanks for watching! We appreciate the comment.

[@woog74]

Brian Tooley is a wealth of knowledge, and he's always willing to share it in a polite, professional manner. I've been reading posts from him on the internet for years. Bob Morreale, who I also respect and think is a wealth of knowledge when it comes to tuning. almost looked lost sometimes with some of Brain's explanations and how in depth Brian went. That's not a knock against Bob at all. It just surprised me, but also made me feel not so bad about my limited understanding of camshaft selection.

[@TheTuningSchool]

We're learning something new everyday. You're not alone!

[@patrickjoyce4178]

Great video. Harley Davidson figured the ratio out as well. With the HTCC head. Brain is a very smart man.

[@krisallison3410]

SO much useful information here! I really appreciate the years of experience he's sharing here.

[@TheTuningSchool]

I know right! Check out our newer videos with Brian Tooley here >> kzbin.info/www/bejne/iZeWeGSiZdJpps0

[@Rainman_actual]

finally someone who believes more in the power of proper engineering instead of just making everything bigger

[@TheTuningSchool]

Yes, Brian Tooley's the best! Check out our newer videos with him here >> kzbin.info/www/bejne/iZeWeGSiZdJpps0

[@MrVictor545]

Just change the exhaust rocker for 1.7 to 1.6 and see if it picks up... Yes Brian people HAVE checked if less exhaust lift picks up power. Your right it usually does :) not quite sure if that .3*valve dia applies to 45 deg seat valves.. Now lets see if that formula works with a 55+deg seat and a large throat dia.

[@Myvintageiron7512]

Thank you for the confirmation I just put out a video on cam selection and my dyno tests confirm the LS1/LS2 heads need .590 to .610 lift going higher in lift has almost no effect

[@charlythevenet5783]

PuYo

[@charlythevenet5783]

Uuuuuuuuuuuquuuu3o3uuu

[@charlythevenet5783]

Qupupuupt3puu

[@davidciesielski8251]

WOW!!! That was great!!! so well thought out, helping everything work together

[@Truthcanbeconfusing]

How about that Valve diameter to lift lesson?! Thank you tuning school and Brian Tooley!!!

[@TheTuningSchool]

You're welcome! Check out our newer videos with Brian Tooley here >> kzbin.info/www/bejne/iZeWeGSiZdJpps0

[@abdulrahmanalmotawa9765]

Amazing knowledge, highly appreciated Brian.

[@kellyperry8755]

The intake valve is sized to provide the desired velocity

[@TheInsaneShecklador]

10:49 _"This natural hairspray Devil's 3 engine."_ Nice job KZbin closed captioning.

[@DriesOG]

So if I decided to go with a BTR Stage 3 cam for a C6 LS2, can I down the road put a procharger/a&a on it? Or would I have to use a boost cam? Power/ET doesn't much matter. Just a bigger gain down the road safely does.

[@mikew6135]

I run a positive displacement supercharger and I want power added everywhere I do not want a cam manufacturer to take away low in mid and just try to make upper RPM horsepower

[@velr50gt]

I used a BTR cam on my last build and it ran harder that my previous cam that was bigger. Bigger is not always better when it comes to cams

[@kellyperry8755]

Its all about air velocity

[@iMaRtYz]

With this information having a look at a cam calculator a 228/244 on an lsa of 118 with +4 advance puts the valve events at IVC: 48 IVO: 0 EVC: 0 EVO: 64. That would be considered a good PD blower cam?

[@frostedbvtts]

Excellent video.

[@TheTuningSchool]

Yay! Thanks

[@johnterpack3940]

I like that he doesn't fixate on boost numbers. People really put way too much emphasis on boost. They don't seem to understand that boost is a measure of resistance, not power. I've got a little blue compressor in my garage that produces 100 pounds of boost... but I don't think it would give my car much power. Kidding aside... would I really need a .615 cam in a 351W street engine? That seems like serious overkill. Or is that 0.3 number just for max effort builds?

[@TheTuningSchool]

I'd say the .615 is a good size for a street engine.

[@johnterpack3940]

@@TheTuningSchool I remember when . 500 was considered a pretty hot cam. Times sure do change.

[@baby-sharkgto4902]

@@johnterpack3940 yep

[@brainward2611]

Awesome information !! Thank you It kind of makes me cry lol I just ordered a cam and it does not match the information Brian is giving

[@gothicpagan.666]

The numbers here in the UK are tiny in comparison. Your exhaust valves are about the same as a big inlet here

[@vermin1970]

I always thought of a lot of boost pressure as your air getting backed up in the intake because your boost device is making more than your engine can use.

[@ls87gbody]

It is a measure of restriction. So in essence your right.

[@mikew6135]

So is Brian trying to say that Lyft has nothing to do with head Flo at the different lists

[@racerd9669]

Even though the Ex lift was less and the duration was more, what was the Ex valve lift at BDC?????

[@markim5087]

Got a feeling this will disagree with Richard holdener ..he keeps saying cam choice doesn’t matter with boost..I’ve always believed that boost just increases whatever you have but choosing the right cam will Help increase the power as if you don’t keep the exhaust open as long prevents boost loss increasing power..

[@braydenmeals9311]

Can i turbo or supercharge on a 107lsa 2 degree overlap?

[@danpollard4210]

have you looked into variable lift such as Rhodes, lifters, port adi"anti detonation injection",or blow through carburator upstream of blower?using water plus alcohol plus fuel?

[@fel1979]

You should always leave the guest video, the larger one.. Not yours.

[@chipturd55]

fel1979 no one cares

[@RB26PWR2]

I care lol.. can’t see anything he’s writing down

[@juiced71]

exactly! he is demonstrating things!

[@TheTuningSchool]

Definitely noted. Thank you for that! Check out our newer videos with Brian Tooley here >> kzbin.info/www/bejne/iZeWeGSiZdJpps0

[@dangerousfreedom4965]

Sounds like a wild na cam would work good in a positive displacement blower application.

[@Mago84013]

this makes me rethink some of the stuff i read on the internet.

[@TheTuningSchool]

Internetz is never wrong!

[@robertvillalobos710]

What camshaft would you use with a tvs2.3 with a 2.65 pulley feeding and a s475 feeding a 408? How would you pick a cam for a compund set up

[@patonbike]

Is the valve size to valve lift ratio true for 4 valve per cylinder heads? for example, I have 2 intakes @ 36mm which suggests .425 lift... ????? My exhaust (2 of them) are 31.5mm which would be 1.24" * 3 = .372 lift??? By the way my cam's intake and exhaust are both .36 lift which seems either less than ideal, or inaccurate info.

[@markim5087]

I knew this was going to be good, Brian knows his stuff, this is much better than listening to Richard HOLDENER, I knew this was going to back up the truth,and that boost cam choice is more than just saying it doesn’t matter, lol..great info..

[@5riddikk]

i really would have wanted to hear his thoughts on exhaust valve close for a roots blower cam. too bad.

[@TheTuningSchool]

Check out our newer videos with Brian Tooley here >> kzbin.info/www/bejne/iZeWeGSiZdJpps0

[@everydayirace]

Great video, thank you.

[@TheTuningSchool]

You're welcome!

[@ryanbarbolt3691]

How to choose a camshaft, call BTR and let them do it for you.

[@TheTuningSchool]

Not a bad idea. Check out our newer videos with Brian Tooley here >> kzbin.info/www/bejne/iZeWeGSiZdJpps0

[@ericgatzke9839]

Question... if I plan on running heavier springs on the valves, wouldn’t it make more sense for me to have a longer duration with no overlap so as to make the most use of the pressure going into the cylinder on intake (I would want to push as much air in until the cylinder hits bottom) and have the exhaust valve open so that the valve stays open until it hits the very top? This would allow for the most intake pressure and allow the exhaust to push more and allow for more push on the turbos manifold side, correct? Just to clarify, if I am running an 8.5:1 compression, and I am closing the valve at 85% of the way down on the cylinder, I just lost 15% of possible pressure into the cylinder, not taking full advantage of the turbo. Same with the exhaust side. If I keep that valve open until the cylinder hits the very top, that clears up more exhaust from the cylinder and that is where the most pressure comes from in the cylinder towards the exhaust side. More air out means faster spool, correct?

[@ghtrcp7554]

Is there BTR cams are made for SBC gen1?

[@yolofullsend]

I'm guessing the smaller exhaust lift will have more of a pull through effect drawing in more fresh air?

[@Charlie_Prinz]

" a herd of turtles................" LOL

[@glenbrown9379]

This is a great video.

[@TheTuningSchool]

Thanks!

[@dennismoran1299]

Love the channel. My question is, why are reverse split pattern cams used on turbo setups? Are they better than a single pattern cam? Thx guys.

[@jasonbeaulieu4979]

the .3 thing really doesn't seem to apply to my current situation. Take a LS2, and look at any of BTR cams, the exhaust is WAY over .3. In fact even the stock GM LS2 cam is WAY over .3 on the exhaust.

[@baby-sharkgto4902]

Incorrect: lift on a stock LS2 cam is 0.520/0.521 and stock LS2 head has a 2" valve exhaust valve.

[@wesco123]

Excellent!

[@TheTuningSchool]

Thanks for watching!

[@jcnopal1740]

So I have a 5.3 vortec, and it has a texas speed camshaft Do i have to replace the camshaft if i want to turbo or procharge the engine

[@amperformance1]

Jc Nopal yes if it’s a n/a cam

[@jamest.5001]

You can probably get by with very mild boost, depending on its specs,

[@Peterjnel]

Where's Forced Induction 7? I tried searching for it..

[@TheTuningSchool]

Here it is>> kzbin.info/www/bejne/Y4bddYNjbLegrMU Did some updates to our videos and playlists; more updates coming soon!

[@mspeals]

Question- Having a Callaway Corvette currently making 757 Horsepower and 777 ft pounds of torque from a basically stock LT4 motor with a 2300 intercooled roots style supercharger instead of the stock 1700 supercharger from the factory LT4, would I benefit from a LS9 camshaft upgrade or a LPE GT35 camshaft in my quest for more horsepower( 830 or more horsepower) on the dyno while not losing out on street / strip performance. Which of the following do you guys think would be best for a hot street car that would still pass emissions and I could still get more power out of it on the strip. the LPE GT35 camshaft-210/237@.050, .605/.617 lift, 116.5 LSA The LS9 camshaft is 211/230 @.050 valve lift and .558/.552 lift with 1.7 rockers and a 122.5 centerline. Which one would be a better fit? This is a Tremec 7 speed manual with a 3.42 rear gear.

[@ghtrcp7554]

I would go with lpe gt35 cam. or BTR stage 3 or 4 cam.. those sounds the best..Very ANGRY SOUND. ..

[@sansui1968]

toyota 7mgte had smaller exhaust cam stock 1987 year -

[@STuTe51]

What kind of Cam would One use for a engine with Twin 76mm Turbos and a root type Supercharger, combo setup?

[@RB26PWR2]

STuTe51 😂

[@ghtrcp7554]

BTR Stage 4 cam.

[@Meowbox9000]

is it just me or are the subs crazy low for such a great channel? shit I love this channle just wish they did a bit on small engines. don't want a 1000 horses just 300 on my miata.

[@TheTuningSchool]

Thanks for noticing! That's something we can definitely consider in the near future.

[@josephsabatino7857]

What song was that metal song??

[@omarlekphet]

i get new information from this chanel

[@TheTuningSchool]

Thanks to all our viewers like yourself! We're doing our best to keep up with all your demands. Keep them coming!

[@RB26PWR2]

Someone talked to Billy G from comp

[@dougmartin225]

10.99 @ 135?

[@JessicaDuFFie]

Three heads are better than two.

[@LS1NNOVATIONS]

Because science

[@ryanbarbolt3691]

Is he talking about my rx7....?

[@piecartbox]

Neat vids ty for publishing them. /comingfromatroll

[@TheTuningSchool]

Well then, you're comment is greatly appreciated!

[@LoveMyKleeKai]

where is part 7?

[@TheTuningSchool]

kzbin.info/www/bejne/Y4bddYNjbLegrMU

[@oldbuddyben]

So you're saying that the enthusiast should set a goal (hp, et, or whatever), plan the build to meet that goal, then stick to it? Instead of just throwing latest/greatest, biggest/shiniest parts that were just promoted by their favorite Instagram account holder on their ride... blasphemy. How dare you approach the build process with even the slightest bit of logic or mathematical rationale! ;)

[@TheTuningSchool]

Haha! Yeah, we're trying a new approach here.

[@richardtisdale3245]

Well i know who I'm having spec my next cam lol

[@TheTuningSchool]

There you go!

[@bravo9890]

is it just me or did the host sound about as clueless as I am.

[@livewiregto]

Black Dragn “sure”

[@gamingwithlay1810]

No😂😂😂😂😂😂😂😂

[@joesmith306]

Wannabe engines need boost. Real engines are NA