How to Choose the Right Rocker Arms 

Very much appreciate that! I tried to look at this more through the lens of a street/strip type of user and what info they needed to know. Hope your small block guy finds it useful! Thanks for your support my friend!

Cool. Thanks!

Thanks!

Cool. Thank you!

Sorry to hear that! Nothing worse than a noisy valvetrain!

Thanks man!

Ratio doesn’t come into play when selecting a type of rocker. Ratio and specifically desired ratio changes when selecting a new cam does. Different video. I’ll likely do more cam selection and valvetrain videos soon.

@@MuscleCarSolutions Ok, thank you! Looking forward to viewing those!

You’re probably ok to continue to use them, but I’d check on them occasionally to make sure they aren’t wearing prematurely. They do require a bit more oil to have a long healthy life. Street driving doesn’t usually give that.

The magnum roller tip rockers have been out for 30+ years. They work fine. It’s usually when folks go outside the boundaries that problems occur and the rockers get the blame.

And as always, I very much appreciate you watching and dropping a comment!

@@MuscleCarSolutions Thanks for the info. Keep the videos coming!!!

missing roller that is where most friction is . to heavy bending rocker studs and causing valve float picture a 2 man saw moving back and forth on tree stump thats how they move not just teeter totter. then put a 600 pound weight on Top of middle of saw saw right through the log if you could move saw it has a 500 pound 350 chevy sitting on your saw

It’s your piston to valve clearance you need to be concerned with. That’s something you’ll need to confirm. Your cam card should have the lobe lift number. Multiply it by 1.75 to get your new valve lift.

Doubtful. Get rid of the booster and go hydroboost or to a manual brake.

Not a fan of the tooley stuff when they switched from COMP to cam motion. Valvetrain got really noisy. Comp has those awesome low shock lobes that keep the noise down. Couple that with their new Evolution lifters that are super quiet and a tooley valvetrain will sound like a rattling old donkey cart next to the Comp. Which leads to your question. The factory rocker arm is just fine with the trunnion upgrade. Unless you think you need more lift, I wouldn’t switch. The power gained would be unnoticeable.

Don’t know. I’ve never really bought into the brand. I’m sure they work well, just never been on my radar.

Rewatch the video. You didn’t provide any of the information to make a selection.

On a stock engine it wouldn’t be an upgrade. No benefit to it.

Sounds like a push rod length issue. It’s not a rocker issue. Incorrect length is the issue.

@@MuscleCarSolutions I'm using the mid length method. That's the only way I know to get the smallest sweep pattern. Pushrod length should be spot on. I can shorten the pushrod, but the sweep pattern starts getting wider.

Negligible.

Since nobody else commented I thought I would. I am by no means a expert on Pontiacs, but they are there own animal just like olds are. There are a number of good books written on them. You might want to look up Vizard the Wizard. He has a bunch of good information out there on rocker and Valve geometry. Valve stem height, rocker height / lenght and push rod length comes into play here. Valve stem too high and the rocket will hit closer to the intake and push outward, to low and the rocket tip hits towards the exhaust and moves inward. Your looking for a 1/4 from center towards the exhaust moving through center at half of maximum lift and 1/4 inward at full lift. Use a magic marker on the Valve stem and turn the engine through two full revelutions, it should give you a good pattern. Two adjustable push tubes will help you get it right. Pontiacs are known for not having very generous push tube clearance through the head. It is common when going over .500 lift the have to open them up for clearance. Even more so when lift and Valve spring seat and open pressures go up and tube diameter has to be increased. Then, of course the more lift the bigger the chance of spring bind. Hopefully this info is even slightly helpful.

Its supposed to do that as roller starts on far side of valve tip and valve goes down it rolls to closer side other wise it would fall off valve. less friction and bind on valve stem and roller rocker trunion . a stock no roller rocker is angled and lenthened to slide back and forth

sorry didnt catch show more

Stock LS3 go right back with the stock rocker arm with the trunnion upgrade. Better to change the cam to get what you’re looking for than change the rocker arm ratio. Duration is far more important than lift.

@@MuscleCarSolutions I know what you're saying but don't want to do an aftermarket cam. Hated the last 2 I had after awhile. Was looking to get rid of the stock trunion problem while gaining a few extra ponies

The question is generally what are the spring pressures, retainer diameter and what the use of the engine will be. Generally speaking, roller rockers are unnecessary on a street engine. What are you building?

@@MuscleCarSolutions 2013 zl1 street car for rolls

Comp makes a set of street rockers. amzn.to/3a63vzv

I used the street roller tip on my 455 olds. Use the guide plates and comps push tubes. You have to make sure the guide plates are aligned and don't rub on the tubes. I would also suggest the adjustable rocker nuts. Just makes set up easier. If you decide to do a cam change, make sure to use Olds lifters. The oil feed slot sits lower than all of the other GM lifters. The others will lift up above the guide bore and loose oil pressure.

Id say your at 600 whp you never got to that kind of Rpm without them isnt that upgraded roller rocker bearings . youd know that if you built that.

@@alonzahanks1182 Truck made 612whp on pump e85 and I’m shifting at 7800-8200 now. Spring set up is near 180-190 on the seat and 475-500 open. Haven’t even switched to a roller rocker set up yet either.

@@rayraylsx1788 you typoed you basically said you did a roller rocker up grade already a CHE trunnion upgrade is a roller rocker axel that bolts down which is a pro roller rocker upgrade and your stock rockers will not work on them I think you are thinking of trying Trunnion Roller rockers and that would be a good choice what truck and engine you got ?

On a stock engine there’s not really any big upgrades on rocker arms. Comp makes a stiffer body stock rocker, but for what you’re doing, it’s unnecessary. I’d concentrate on the details of my you weren’t getting oiling to the top end. Might as well replace the oil pump and pickup while you’re at it and inspect the bottom end for any excessive wear/damage.

@@MuscleCarSolutions OK thanks. Oil pump is a brand new melling, I’m actually getting good oil pressure up top through all the lifters except for one, sorry if I didn’t explain it very well

What is your goal with that engine? What operating RPM? How are you planning on using it?

@@MuscleCarSolutions hey I thank you so much for getting back to me. I'm hoping for a motor that sounds stock but has a bit more power then completely stock I'm not sure if I could run seem cam with bigger pistons and Edelbrock head with Harland roller rockers I am very new to this whole 4. 0 motor but I'm really interested in what you would recommend I don't want it to sound cammed I wanted to idle normal but I also don't want to go 40 miles an hour up a hill at 4000 RPMs

@@jeepxj1434 it seems like you're planning on putting a bunch of money into this engine for not much increase in power. I would go for some more compression, a torque cam with better lifters from comp cams, better steel roller rockers. Don't waste your money on a header, the 91 to 99 what manifold is more than adequate. Put on a good exhaust with less back pressure and a better sound. Upgrade the fuel system. You would get your power increase and save money for the broken parts you will have There is a bunch of jeep groups out the that could steer you in the right direction.

Yup. The spring in that kit, depending on what your installed height is, will be way under the 850 lbs threshold. That’s a really good K kit as well. Great street cam.

Just out of curiosity, how did you like the setup? I have a 383 I am building with the same cam, what can you tell me about it?

@@brianchadwell2 wish I could tell ya more, but life keeps getting in my way on this build. Still haven’t put the engine together. Working on the differential and transmission at the moment.

@@ck1insac lol it took me nearly 3 months to get my trans and diff done, now I am waiting on the engine to be completed. Oh well..... Projects work like that sometimes.

Everything is application specific. Hands down Comp makes the best street rocker.

YES ????????!!