EXHAUST VALVE SPRING TECH! DO WE NEED LESS SPRING PRESSURES? 

Ben has loads of common sense wisdom and is a treasure. Thanks for all your hard work Ben

Crazy is defined as extremely enthusiastic. Yes you are extremely enthusiastic about making more power. And we all are truly grateful for you being extremely enthusiastic, and sharing it with the world.

I don't binge watch your videos , I'll watch 1 and think about it for a week or two. This one is no exception. People ask me "Whatcha' thinkin' " ? Engine dynamics! They mostly leave me be . Good stuff.

More videos more knowledge please.. Ben you are AWESOME..

Great stuff here. I can listen to these classes every week. Always new things to think about. Thank you for sharing all the experience Ben.

Your not crazy Ben. Your experience and analysis is amazing. Every time I watch a video I wonder what you will come up with next. Great videos that keep me thinking.

Good video and very insightful Ben. It's much cheaper to spend $300 + bucks on a set of good springs rather than shimming. Not worth risking destroying a motor. If I remember correctly I think we're running a PAC 1224-16 spring in the 430W Falcon.

I was building a little scooter engines last year, I went with a head with oversized valves, when I lapped the valves, I noticed it would flow alot more if the valve was about 1.5mm smaller, so I went with another company who bored the seats out, before seating the valves, making a better fit, un-shrouded! I basically doubled the power of that tiny engine, ported the head, polished the piston, chamber work, a cam, and a slight shave, nut I want to cut about .060-.080" from the head, get the compression to about 195-210 psi, with the higher compression piston I'm using , it's in the 165-170 psi range , judging by the performance, i already went from 2.5 hp to about 6hp , going from 39mm bore to a 50 mm bore, with valves 3mm larger, 20/23mm, vs 16/18.5mm and the ports opened freatly stiff springs , and titanium retainers! It's seen 10500 RPM, but is basically done by 9500+-9800, itneeds a cam,

I like your thinking Ben. Love your channel. I had an additional idea. If I was going for the ragged edge/minimum for spring pressure on the exhaust, I would think to size the spring using a spin-tron machine just at the maximum engine RPM with the spark plug installed and then decrease the spring pressure from there to take advantage of the exhaust gases assisting the valve. The problem though is if there was a failed combustion event on any one cylinder or multiple cylinders at the track, such as by a failed spark plug(s), the valve would no longer be assisted by waste gases and possibly cause the valve to float while the other running cylinders kept the engine at high rpm and then smack the piston! Obviously there would have to have some cushion added.

Very good info! I always look forward to your next video. Thanks for sharing your knowledge!

On supercharged or turbo engines high seat pressures is a must, you are counteracting the manifold pressures, if you have 45psi manifold pressure and a 2.40 intake use the corrected area minus the stem area by pi and that's the pressure trying to blow the valve off its seat.......Hat.

Dude that just blew my mind! 😲 It makes so much sense yet I never thought of it that way 😂

Good stuff Ben. Thanks

I agree with you a couple videos about having compression at 11 for the street. I can get 93 octane pump gas on every 3rd corner where I live. I enjoy your knowledge very much.

Great video as usual !! Thank you Mr Alameda

Very interesting Ben, amazing technical insight brotha. So its a must to modify these areas of the spring to lengthen life, more like correct the manufactures design flaws😂😂. Love the way you think man. "Loft". I never actuslly thought about that. But man it sure does matter. Really got my gears turning in my head. Thanks buddy for shsring your knowkedge and experiance to help us grow to be better more efficient engine builders. Talk to you soon man.

Good Tech Ben. Thanks for sharing. Take care, Ed.

Thanks Ben

Great job Ben

Thanks for video!

Great video

Love the channel

Good stuff, Ben!

You're right about high speed exhaust creating a low pressure on the cylinder to help pull air/fuel into cylinder during overlap and also cylinder pressure makes the exhaust valve require way more physical force to open it. So there are two factors, cylinder pressure pushing valve into the seat & the low pressure areas created during exhausting. I remember guts using too tight an LSA cam on a turbo car bending exhaust pushrods with ease as they learned cylinder pressure was too great to physically open the exhaust valve.

Ben you are a very smart man on these engines is there anything you don't no lol great information

Hello from. North Carolina Ben. What you are telling us makes so much sense. Especially with the smaller exhaust valve. To slow the intake charge from going out the exhaust. I remember when I was little my dad would tell me engines need back pressure so the unburnt gas gets pushed back into the cylinder so it can be returned. He said it helped with fuel mileage and power. Not sure if that is correct or even partially correct. But using a single angle on the exhaust valve to slow the exiting of intake charge definitely makes sense. Thank you for your videos as always.

I was thinking about lighter exhaust springs when I heard how much it took to open the exhaust on pro mod motors. Thanks for explaining it. On the blunt end it's like hitting the coil with a chisel. Eventually that concentrated hammering is going to do damage. When a spring loses it's spring pressure the metal is becoming fatigued and shimming it will just accelerate the material fatigue and it will fail sooner.

I hope that there is another video that talks about the conical valve sprng.

Man you give me something to thing about every video. Very good stuff. If your spring rate is say 400 what would u recommend the exaust rate be reduced to? With a .630 lift cam . I may try this reason for asking because it makes sense and I can see where it would save horsepower by not having to turn that extra pressure being exerted on the cam

I agree with your thinking of a lighter spring for the exhaust valve. If I eliminate the inner spring would that be ok or too much? Thanks.

I wish i could get a cam reccommendation from ben almeda himself 😢

Ok Ben, I follow the logic. My question is; how much can I decrease pressure? Let's say I've got a double spring rated at 380lbs over the nose to control the intake valve up to 0.660" lift.... Can I run the stock spring on the exhaust? Can I remove the inner spring of the double? Do you have a known equation or a given value that the spring pressure can be decreased? I bet you're going to tell me, "All applications vary. You'll have to try and see."

not necessarily, you want a fast exhaust ramp to open the exhaust rapidly, so you can keep the exhaust closed as long as possible but crack it fast and hard to evacuate the cylinder

May ask ur opinion on this subject but when you have an inconel exhaust valve in a marine application and the exhaust valve is heavier would you still lighten the spring pressure. 100 percent agree with a smaller exhaust diameter.

Hey Ben i was wanting to try some used race springs on a milder application that no longer requires the amount of stiffness it had before, so should they last since they are weakened beyond their prime that their strength that is retained still remains indefinitely or a much longer period of time. Well also trying a custom design hydraulic roller cam i want to build with multiple base circles. Cam shall be .600" peak lift only because of the rocker arm ratio throughout it's arc. i can tell you a secret about this cam, although it is probably not anything you haven't heard before . . .The intake valve off the seat is faster and the cam and spring smoother because . . . .guess. . .

GREAT VIDEO BEN, THANK YOU, HOW DO I GET IN TOUCH WITH YOU? IM BUILDING AN ENGINE AND I WOULD LIKE TO BUY SPRINGS FROM YOU I WOULD LIKE TO GO OVER WHAT IM DOING WITH YOU SO I DONT RUN INTO ANY PROBLEMS OWN THE ROAD , I JUST SUBSCRIBED, THANK YOU AGAIN

Better Hope No Coil Bind...? Ck your retainers.make sure there not touching the seal .!! If it does you be pulling the Motor. For sure.....metal gone through everthing. New cam and lifters at least..all bearings maybe a crank as well .

Ben what about the retro fit Beehive single spring not using a dampener? does it work because of there shape, Brett

Ben, can you pls tell how to have lifter springs.,

I heard someone suggest that running single springs very close to coil bind would stop the hula effect at max lift, and thus help with control. Is this reasonable? if this is good, what would be too much shim if shims were needed to achieve near coil bind?

I was told with high compression it helps close the valve?

Is Ross pistons/isky cams sponsors also how do you come up with a proper cam do you use a equation of some sort ?

Just think if you had a chev..😊

Are your exhaust springs are different than the intake springs? If the exhaust lobe is taller than the intake, do you set the installed height greater on the exhaust (less seat presssure) to come to the same compressed height as the intake?

Is there really a top and bottom of the spring pack?

Is it not typical to run a titanium intake, steel exhaust and the reason the pressures would be similar?

You could calculate how hard the engine is pushing against the valve, how many psi to the square inches the valve is.

So if i wanted less spring pressure on my exhaust valves should i order a new set with less pressure or take some shims out?

The low pressure closing the exhaust makes me wonder about the oil seal …. Pulling oil into the exhaust…hmmm

Absacrazylutly, its called aerodynamics ¡!!!

If what he is saying is true, now I know why so much carbon builds up on the valve. Low pressure .

I'm A-B normal too.😂

"I could've had a v8"....lol

Thank you for your knowledge and videos USA 🇺🇸 TRUMP 2024

Not crazy very smart

Rotary valve/cam valve. Problem solved.

Years ago we use to put a shorter pushrod on the intake for those reasons from what I remember