TAQuickness

iTrader: (28)

Is it better to have a push rod that is 0.005" too long or 0.005" too short or is 0.005" close enough for government work?

Bo White

iTrader: (59)

Wouldnt worry about it.

TAQuickness

iTrader: (28)

Would you still not worry with non-adjustable rockers?

GuitsBoy

iTrader: (4)

If youre running stock hydraulic lifters, i wouldnt worry at all.

TAQuickness

iTrader: (28)

morel's... Should be ok then.

GuitsBoy

iTrader: (4)

Well, the whole purpose of a hydraulic lifter is to take up and slack in the valvetrain as the lifter fills with oil, that way setting the lash was no longer necessary. Certain hydraulic lifters however are a bit too stout to function the same was as stock and thus require setting the lash. Comp-R lifters come to mind. I dont know if morels require adj rockers or not.

John02SS

iTrader: (47)

Morels are very sensitive to preload. How much preload are you looking at with the longer or shorter pushrod. They gotta be around .030 on the morels. I run them myself and they don't like anymore.

John

TAQuickness

iTrader: (28)

they are "supposed" to be drop in replacements for OEM.

Just spent the last week triple checking every measurement and want to make sure I order the right parts. I'd hate to have to do this again

TAQuickness

iTrader: (28)

was looking at 0.050"

Starting to sound like i need to make a few calls

John02SS

iTrader: (47)

Supposed to be the is the key word. They are a lil longer than stock and if you put too much preload on them they will float the vavles. I can verify this also, as I set mine up at .060 the first round buying into the idea that they are the same as OE. After the fact I found the .030 measurement to be the way to set them up. Several of the valvetrain guru's on here verified. Do a search for Morel and check it out. Pretty good reading.

John

TAQuickness

iTrader: (28)

actually, i think i've read every morel thread on here. Is there a specific one you are refering to? I see anywhere from 0.030" - 0.060" as the acceptable preload. I also verified the lifter cup sits ~0.079" higher on the morels than oem.

Viper

iTrader: (6)

TAQuickness

I'm going to be redoing my setup over the winter. Morels, stock rockers and currently 7.350 PR's. My preload is .075 now. Assuming a 7.40 will give me .025 preload, but I'll be measuring either way. Should gain power too.

What's your setup again? I recall reading in the past but didn't want to do a search on it.

John02SS

iTrader: (47)

https://ls1tech.com/forums/generation-iii-internal-engine/406544-g5x4-hs-gold-springs-morel-lifters-issue-6700-a.html

See the post from Cstruab. I also verified this thruogh PM's with Ed Curtis at FTI. .025 to .035 preload cold was what they stated the morels have to be. I just finished my swipe test and preload check with adjustable pr and I came up with a .055 shim and use a 7.320 PR. My heads are cut .035, using .040 cometics, and the taller morel lifters. I checked each valve today and with the above combo the swipe is great and preload is .025-.030 on each.

Viper

iTrader: (6)

But what if you took .050 off the shim and added it to the PR leaving a .005 shim; wouldn't that still give you correct numbers? I ask because a .055 shim seems tall. Or did the swipe just absolutely work best with a shim that big?

John02SS

iTrader: (47)

I tried many shims and it didn't look as good. It was wide and with the .055 it was very thin and favored the intake just a hair. Looked really good. I tried everything from .015 to .060 (pain in the *** finding all those shims!) and the .055 just had the better swipe pattern. I spoke to trevor at texas speed and he said that size shim is perfectly safe and your good up to a .080-.090 shim as long as it is a good quality shim. The less shim you go with the shorter the pushrod has to be. If I pull any shim out the PR gets really short!

And on the shim, you have to mulitply it by 1.7 to get the amount of prelaod change. Say you pull .005 off the shim it will effect the preload .0085 due to the rocker ratio. That was new info for me also!

Viper

iTrader: (6)

Thanks, this is some very good information.

TAQuickness

iTrader: (28)

Thanks for the link John... I'm glad you have tried both, as it seems I now need to reconsider my push rods lengths or sell my SS's and get an adjustable set.
https://ls1tech.com/forums/generation-iii-internal-engine/242575-morel-lifter-preload.html

Viper - Shoot me a PM and we can discuss the set up. I prefer not to publicly discuss the plans behind my new and improved resonance coupled plasma discharges

John02SS

iTrader: (47)

No problem fellas! Early on seems everyone was being told to go with .060 on them. You would prolly never know you was leaving power on the table. The cars that turn the RPM's is where it really bites. My car would lay down starting at 6700-6800 and be dead at 7000. It was holding the valves open. Most folks would have never spun the motor that high. Thank God for 2CC valve reliefs!

TAquickness,
Man keep the SS's! It is a pain to go through the hassle of the swipe and ordering custom pr's, but when it is done it is over and you don't have to worry about it again. The Jesels are bad boys! I'd love to have a set that is for sure!

John

TAQuickness

iTrader: (28)

I'm actually pursueing the custom length PR's for the 0.030" cold preload. How's your valve trian sound John?