MILD THUNDER

iTrader: (3)

I think its a little more than .050 if you measure with an indicator. yes, the thread pitch of the stud is .050 with 1 turn, but theres a little more to it. Not enough to matter though since pushrods come in .050 increments. I'd say going off your .050 assumption is good.

Black Baja

iTrader: (2)

1 turn is actually .085 u have to ad rocker ratio. John Callies recommends .030-.035

MILD THUNDER

iTrader: (3)

Ive found that the morels are much quieter at 1 full turn past zero lash. The morels have .143 of plunger travel before they bottom out.

Black Baja

iTrader: (2)

I thought they said they were .120 plunger. I measured the plunger in mine and they ranged from .112 to .118 I only measured two sets though. I run mine just under 1/2 and no issues so far.

MILD THUNDER

iTrader: (3)

One of my engines I went 1 full turn past 0 lash. The other engine, a buddy of mine adjusted the valves. I think he went about 5/8 turn. The engine with 1 full turn past 0 had much less audible roller noise. Heres a quote from bob m last year about the morels.


With a 7/16-20 stud @ the fulcrum point there is .050” drop per full turn. A 5/8 turn results in a .031” drop at the fulcrum with a resultant drop of .049” at the lifter with a 1.7 rocker ratio. I have seen, in most instances that preload figure will yield audible noise.

One full turn yields a .050” drop at the fulcrum with a resulting drop of .079” at the lifter. A three quarter to one full turn will place the plunger at the proper height to purge the chamber and eliminate any audible mechanical sound. This figure is marginally past the half way point of available lifter travel.

These figures are for iron/aluminum, and will be ~ ¼ turn less with iron/iron combinations.

Bob

Black Baja

iTrader: (2)

What weight oil are you running? I run 30 and beat the piss out of my motor and there is no "audible noise". And I've run my boat with the hatch off do I know for sure.

MILD THUNDER

iTrader: (3)

20w50 Valvoline VR1 Synthetic. Im not calling you a liar. I am just stating what I, and many other people have noticed about the morels being quieter with a little more preload than recommended.

The noise I am talking about is really only noticeable at idle.

I have the 4603 style lifters. The noise from the engine that had 5/8 turn wasn't alarming. I just noticed that the other one was quieter.

Black Baja

iTrader: (2)

It's all good man. I'm not sure what number lifters I have but they aren't the standard ones. They are high rpm and look totally different from any other lifter I've seen b4. I know guys that will put a .005 feeler between the valve tip / rocker arm and crank the adjuster until it bottoms out... Just the way some people do it is it right is wrong? I don't know?

I do wonder though how much oil viscosity affects the lifters because the do recommend no more than 40wt...

fbc25el

What length did you come up with for your exaust?

Budman II

iTrader: (1)

I have also read that pushing heavy weight 50wt oil, especially when it is cold, might not be such a good idea for the bearings, not to mention the fact that you are putting a lot of load on the distributor gear and using up power to turn it.

What kind of 30wt oil are you running? Full synthetic? Wondering what your oil temps and pressures are running at easy cruise, idle, and after an extended hard run. What are your bearing clearances? I'm thinking about running something lighter myself, but probably closer to 40wt, maybe closer to 15W40 or 20W40 if I can find it.