boys now its my turn..need a little help

[S14-NEO]

can someone who has searched the world please tell me if there is a better or stronger rocker arm than the stock SR ones. I just shattered three of them and dont wanna repeat performance. i only had my car off the dyno about five hours when boom it happened. it really took the wind out of my sails here, so if anyone and i mean anyone has any kind of info os stornger than stock rocker arms please let me know. i have a lot of money tied up into this engien and head , dont want to start over, i kinda wanna keep what i have cause it has worked well so far.i like the setup i have with the cams and springs...just need the final piece. i just did something stupid that i will never do again...(i over revved it by revving it in neutral)...i know i know big mistake..but i was showing off..it wont happen again

please help

mark

[USsil80]

to what i have seen no... AEBS modified them but i have no idea how... any info on your set up or a post you made about it..

[Florida240sx]

He's got a built engine.He just got it tuned and he revved it a bit and it instantly shot up to 10kish rpm.Shattered rocker arm.Haf 400rwhp with 340torque and upped the boost a bit more since.so say 430 and 370. Everythign is undamaged except for rocker arm are gone.Stoppers are fine and cams ar fine.Just need new rocker arm and was wanting one a bit stronger.Any link would be helpful.

[biglipzit]

I did a quick search but couldn't find any. The stock rocker arms should be fine but upgrading the rockerarm stopper to an aftermarket one is suppose to strengthen the whole assembly for revaholic people. Maybe you should look into it. Greddy and HKS makes rocker arm stoppers for the sr20det.

[S14-NEO]

thats just it i had the rocker stoppers in there and they still broke. I broke them in half, and one i split almost down the middle and the shims made a nice mess of my titanium keepers

[AJ1356]

i checked JUN and TOMEI to see if they make rocker arms and they did not just rocker arm stoppers. and they have lots of engine internals. you may have to stick with stockers

[S14-NEO]

yeah its looking that way...someone told me about getting my new ones cryotreated. thats something i would like a little mroe info on and if anyone out there has had them done before i would like to know the cost and if its worth the moeny to have that done

[USsil80]

http://www.cryoplus.com/index.html ..here is one place that does it.... youmight be able to find more.. the site tells you about what the process does... i would suggest doing it... think i might.since my head is apart...

[gpeele]

what about getting them shot peened before having them cryotreated? please post some follow up info as you learn more about this. im very interested in doing this myself.

[S14-NEO]

nice link, thanks man. i checked it out and got a quote and was very surprised at the price..very cheap and a quick turn around. the price is set at a measly $2.00 buck per rocker to get them cryo treated.. (I'M ALL OVER THAT)!! if you get the rockers or what ever product ther by friday , they will have your parts done and be shipped out by the following monday..(lovin' it)!!

[Onizuka]

Yes, shot-peen and cryo'd. And rocker arm stoppers if you dont have them already. I just have the RAS; dyno pulls, autocross, and 13,000 miles of hard street driving, rocker arms are still 100%.

[USsil80]

what does shot-peening do exatlly .. please

[Hijacker]

shot peening involves shooting small pellets at the metal to work harden it. they create micro fractures in the surface of the metal that can stop a fracture from going all the way through the material. it's a common practice that dates all the way back to the early days of forging and metalurgy.

if you want to get all anal-retentive about the rocker arms, I would also go down the side with a grinding wheel and get rid of any flash you see down the side where the mold was when they poured the rocker arms. By grinding that flash flush with the surface of the rest of the material, you'll eliminate a stress riser. I would also double check to make sure all edges are rounded instead of sharp. That will reduce another stress riser that could potentially be an epicenter for cracking.

But the most important thing you can do to stop from breaking your rocker arms is don't over rev your motor. Just because you have a RAS does not mean that the rockers will not come off the HLAs and start floating. It's only a preventative measure that can help reduce the chance of valve float, not completely eliminate it. Thinking that your RAS makes your head bullet broof is like doing a dirty hooker thinking your condom will keep out the nasty STDs.

[S14-NEO]

well after getting it completely apart, i was able to closely inspect the cams. i did find some pretty good scratches in the lobes . i am going to try and smooth them out and reinstall them, i think they should be fine as long as i only take off the high spots.

[S14-NEO]

i had some used rockers on the shelf in my garage. so i installed them to test to see if the valves were bent. i reinstalled the cams after i smoothed out the lobes and fired her up..music to my ears..i am going to be pulling it back apart once i get the new rockers back from being cryoed and give it another shot...(I WILL NEVER MAKE THAT MISTAKE AGAIN)!