2110 Johnson lifters, p-rod length and preload?

[07-SRT]

So there is conflicting info about preload on the LS3 rocker. Some say 1 turn is equal to .047 and some say .078 of preload on the lifter, can anyone confirm for certain? as I will be installing the 2110 Johnson lifters. Also once I find zero lash and rotate the engine a few times and the pattern is in the middle of the valve tip dont I just add what preload I want to the length of the pushrod ( using comp pushrod checker)or do I have to set preload by how many turns on the rocker bolt to 22 ft lbs? I want to be as acuurate as possible from what I understand the Johnson lifters arent as forgiving on range as the LS7 lifters or so I have been told.......

[Sales@Texas-Speed]

It's about .020 per 1/4 turn of the rocker bolt, making the .078 accurate.

With the length checker, once you get the length you need for zero lash, you just add in your desired preload. That would be the pushrod you need to order.

[BFASTNOTLAST]

From one of the engineers at Johnson the 2110 wants .035 of pre-load.

[frankwjr]

Get cyl 1 tdc! on intake put in checker in most closed position...tq down rocker to 22..ignore all this turnin stuff...now turn ur checker up until it and the rocker tip on the valve are just barely snug(do not compress lifter plunger!)...take off rocker and take reading..zero lash...now add what ever your manufacturer wants for pre load you gets pr length... most have a +/- variance but never exceed min/max...

btw - more preload - less noise...less preload = less chance durin high rpm if you float the valves cause your springs are weak you are less likely to pump up lifter and kiss the piston...race setting...peace out...

[Bildo]

Almost all the Johnson lifters are .035 -/+ .005 I was just researching this today for my 2116 LSR

[ksmrz]

The guy I spoke to at Johnson said .035-.045. But to be honest you well get it close but not exact. I was +or-.006. I measured every single pushrod using a length checker. Counting turns and also measuring with a caliper. Ended up with 2 different lengths required. Heads were done at advanced inductions. So stack up wasn't the best but It still worked out. Something to keep in mind but not confuse you if you do count turns and also verify with a caliper is a 7.4" pushrod will measure about .020 longer than by counting turns. I spent a lot of time on measuring mine. And it was easy to do the math. By using the caliper you will know exactly what you need to get zero lash. Not a guess.

[ksmrz]

But these lifters were the slow leak down but not short travel. The 2110r is iirc

[christianchevell]

BTW the difference in the actual travel of the nut on the threads of the stud that holds the rocker...well its a rocker with a ratio meaning a turn of the nut translates into a effective distance change on tip of the rocker that has be determined by formula of the ratio of the rocker, SOMETHING MANY PEOPLE DO NOT KNOW THEY EVEN HAVE TO USE AND THEN THEY SCREW UP......MAKING SOMETHING IN EFFECT A LOT TIGHTER THAN NEEDED SKIPPING THE MATH THEY DO NOT EVEN KNOW ABOUT SO YES TEXAS SPEED IS RIHT THE EFFECT MOVEMENT OF THE ROCKER IS MORE THAN THE .047 IN THE TURNS OF THE THREADS OF THE STUD. I AM SHOUTING BECAUSE OVER THE YEARS MANY HAVE MISTAKENLY THOUGHT THEY KNEW IT ALL AND IGNORED THIS MATH, THEN WELL THEY LEARNED THE HARD WAY EVENTUALLY THEY OVER LASHED/PRELOADED THE LIFTERS TO DEATH ALONG WITH THE CAM ETC......AND BLAMED IT ON COMP CAM OR THE GRADE OF THE STEEL, OR THE OIL WHICH THEY DID NOT EVEN DO A BREAK IN WITH ON THE CAM LIKE A GOOD BR30 FROM DRIVEN RACING...'

JUST A FEW THOUGHTS FROM A OLD MOTORHEAD, JUST BECAUSE YOU CAN FIND ZERO LASH THATS NICE, KNOWING HOW EFFECTIVELY YOU ARE MOVING THE GEOMETRY OF THE VALVETRAIN...WELL THATS PRICELESS...OR VERY COSTLY..... AND THE MEAN .078 THAT THE TRAVEL OF THE NUT BEING .047 MAKES DUE TO THE RATIO OF THE ROCKER WOULD BE CHANGED DUE A DIFFERENT ROCKER RATIO................JUST FYI FROM A OLD MOTORHEAD WHO USED TO DO HIS OWN EVERYTHING ALL THE TIME. JUST A TIDBIT OF INFO THAT MANY DO NOT KNOW THAT MAKES THE DIFFERENCE BETWEEN PLUNGERS SLAMMING THE INTERIOR OF THE LIFTER TOGETHER AND EVENTUAL DISASTER THAT COULD BE AVOIDED IF A DIY GUY KNEW WHAT HE WAS DOING. GOOD LUCK, MEASURE EVERYTHING, USE THE RIGHT SPECIALTY TOOLS AND DO A BREAK IN WITH A GOOD 8620 CORE AND YOU SHOULD BE FINE, AND YES LS ENGINES DO LIKE TO MAKE NOISE AS THE THING IS THE ENGIEN WILL WARM UP THE CLEARANCES WILL CHANGE AND GET TIGHTER SO NOISEY ON A COLD ENGINE LIKE MINE MEANS WHEN ITS WARM ITS TIGHTER, SOUNDS BETTER AND HAS THE PROPENSITY TO NOT FLOAT THE VALVES UP HIGH BETTER YET IS ANNOYING FOR THE TYPE WRITER SOUND.

[07-SRT]

Now I'm nervous about putting this engine back together... The heads are being ported, milled, 5 angle valve job, larger Xceldyne exhaust valves and 2110 Johnson lifters. I will find 0 lash and add for preload then verfiy on turns.Still going to be nervous the first start...

[Olddudesrule]

Christian, I mean this in the most constructive way...Take a breath, dude! You obviously have a good amount of real world LS experience, but reading your lengthy posts is difficult. It's not the shouting, it's like your shot gunning it!

Keep rocking on.

[frankwjr]

Don't be..take pic's and post for us to see..somebody should be available...give us a heads up before you start...this shit is fun and when you can say you did it yourself makes it all that much better...good luck

btw - how much milled and new cam core could result in a 7.3 ish pr easy...if you don't already have them get LS9 head gaskets...little more but hold way better...and like in the other thread when you order your pr don't be afraid to use 3/8..I have BTR 7.4 in my stocker, pac-1218's and and bronze trunnion kit...I want to find out how much a stock short block can put out with bolts ons...peace out

[07-SRT]

Originally Posted by frankwjr

Don't be..take pic's and post for us to see..somebody should be available...give us a heads up before you start...this shit is fun and when you can say you did it yourself makes it all that much better...good luck

btw - how much milled and new cam core could result in a 7.3 ish pr easy...if you don't already have them get LS9 head gaskets...little more but hold way better...and like in the other thread when you order your pr don't be afraid to use 3/8..I have BTR 7.4 in my stocker, pac-1218's and and bronze trunnion kit...I want to find out how much a stock short block can put out with bolts ons...peace out

Thanks wil do appericate any help...... Already purchased OEM LS3 head gaskets. The heads are about 2 weeks out @ landspeed. I was going to purchase trend or manton pushrods 5/16" with.105 wall

[frankwjr]

any pr will do over stock....they flex like bow strings at high r's...answered your other q on the other thread...whew...good times....drag racin right around the corner!

[Dmpsix]

Word on the block is that the Johnson lifters are better than the LS3/LS7 lifters.

Can anyone confirm?