? about Comp-R's
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Originally Posted by calongo_SS
I don't know about longer push rods, but you'll need adjustable rockers with comp-r's.
I mainly asking for someone else who has to much clearance (.025" slop) and was recomended to use longer than 7.400" PR's to get the correct preload.
This is with 64CC Patriot heads, stock MLS gasket, stock rockers, and 7.400 PR's. With this he has .025" clearance, no preload.
Dan
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Originally Posted by calongo_SS
I don't know about longer push rods, but you'll need adjustable rockers with comp-r's.
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Just trying to keep the mis-info down, I bought my comp r's a while ago and when I searched for pre-loading I found mostly misinformation and confusing posts.
I've been running with that amount of preload for some time, and have experienced no issues. Nor do I expect any, engine is quite as can be, car pulls hard to 7k and I've run on the road course doing a lapping day without an issue.
I've been running with that amount of preload for some time, and have experienced no issues. Nor do I expect any, engine is quite as can be, car pulls hard to 7k and I've run on the road course doing a lapping day without an issue.
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Verdad Gallardo spinning the pushrod under the rocker arm and tightening the rocker arm bolt until you get resistance. then do 1.25-1.5 turns past that. most likely you will need a pushrod length checker. it's kind of a tedious job but well worth it.
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From: BFE
That is the trick though. With non adjustable rockers, you adjust preload with variating p-rod length. So some poeple just get the right cam (basecircle) for offshelf p-rods available, and by pure luck end up in the right margin.
Adjustable rockers is the way to go to have "true" proper preload adjustment on these.
But if you are choosing this lifter for anything under .600 lifts, you are waisting your money. Comp 850-16 is more than enough for the task, cheaper than stockers and much more merciful for preload adjustments.
Adjustable rockers is the way to go to have "true" proper preload adjustment on these.
But if you are choosing this lifter for anything under .600 lifts, you are waisting your money. Comp 850-16 is more than enough for the task, cheaper than stockers and much more merciful for preload adjustments.
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From: BFE
Originally Posted by LS1 Swapper
You most certainly do not need adjustable rockers for comp-r's, just pre-load the lifters ~.050-.060" cold and be happy.
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At what lift/spring pressure do you need to change from the stockers to comp r's or better? I am running .628 lift with cranes shimmed and after tuning I will be revving higher. (.592 and 1.8's)
Also some guys are bashing the comp r's. Did they have an issue? I've heard the rumors but does anyone have factual information?
Also some guys are bashing the comp r's. Did they have an issue? I've heard the rumors but does anyone have factual information?
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Originally Posted by PREDATOR-Z
Please expalin how YOU did that with non adjustable rockers.
Wondering that myself.
If you install them from zero lash with the stock rocker mounting bolts it should be 1.25-1.5 turns till you get the 22lb TQ setting. To adjust from there.....???
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From: BFE
That is done by different length push rods.
I just want to know how he adjusted non adjustables to read .060 cold?????
Maybe there is some magic?
Unless it is just like I said, pure luck that the pushrod chosen fell within that margin with the base circle that his cam has.
I just want to know how he adjusted non adjustables to read .060 cold?????
Maybe there is some magic?Unless it is just like I said, pure luck that the pushrod chosen fell within that margin with the base circle that his cam has.
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From: BFE
This is a quote from Comp rep.
And this one;
Hope this clears the smoke.
:
Originally Posted by Brian@CompCams
LS1Tech Sponsor
Join Date: Nov 2002
Posts: 538 the Comp pro-mag lifters(R)(875's) are only supposed to have .002"-.004" preload..any more than that could result in the retaining clip getting popped out of the lifter and causing lifter failure...so...they only need like 1/16th of a turn past zero lash..so..that being said..in no way,shape,form,or fashion can you just torque them to 22ft/lbs...now..on the OEM style(850's)..they are for standard recommended preload of .030"..just like anyother hydraulic lifter..so torque to spec will be just fine on those
Originally Posted by Brian@CompCams
LS1Tech Sponsor
Join Date: Nov 2002
Posts: 538 the Comp pro-mag lifters(R)(875's) are only supposed to have .002"-.004" preload..any more than that could result in the retaining clip getting popped out of the lifter and causing lifter failure...so...they only need like 1/16th of a turn past zero lash..so..that being said..in no way,shape,form,or fashion can you just torque them to 22ft/lbs...now..on the OEM style(850's)..they are for standard recommended preload of .030"..just like anyother hydraulic lifter..so torque to spec will be just fine on those
And this one;
:
Originally Posted by Brian@CompCams
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Join Date: Nov 2002
Posts: 538 ok..calm down. Yet again we need to discuss this. DO NOT confuse lash with preload. This is apples and oranges, we are talking about two completely different things. Lash is slack in the system, preload is just that..pre..loading the system. The pro mag lifters require .002"-.004" preload HOT..not cold. I would probably put .008"-.010" preload when cold. Zamboxl..you have a Pm.
Originally Posted by Brian@CompCams
LS1Tech Sponsor
Join Date: Nov 2002
Posts: 538 ok..calm down. Yet again we need to discuss this. DO NOT confuse lash with preload. This is apples and oranges, we are talking about two completely different things. Lash is slack in the system, preload is just that..pre..loading the system. The pro mag lifters require .002"-.004" preload HOT..not cold. I would probably put .008"-.010" preload when cold. Zamboxl..you have a Pm.
Hope this clears the smoke.
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So, can anyone answer my question? Here goes again, does anyone know if the Comp-R's plunger has the same height as an OEM lifter plunger? I already know the pre-load specs and how to do it...
Dan
Dan
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Here we go again
https://ls1tech.com/forums/generation-iii-internal-engine/376522-lifter-question.html
Not interested in arguing again, in fact I'm not going to waste my time with this topic no skin of my ***.
I don't know what Brian is saying but if the lifter is pre-loaded cold(and hot) how is the circlip going to effect anything? With low preload, resulting in hot lash I could see an issue on the circlip.
I really think comp needs to spend a lot more time explaining their lifters, and these issues. If they have such a weak circlip/poor design then maybe it should be fixed. Or maybe people shouldn't be buying their products considering the lack of instructions and explainations provided by them.
Mine work just fine pre-loaded to as I've stated ~0.060", must be magic...
https://ls1tech.com/forums/generation-iii-internal-engine/376522-lifter-question.html
Not interested in arguing again, in fact I'm not going to waste my time with this topic no skin of my ***.
I don't know what Brian is saying but if the lifter is pre-loaded cold(and hot) how is the circlip going to effect anything? With low preload, resulting in hot lash I could see an issue on the circlip.
I really think comp needs to spend a lot more time explaining their lifters, and these issues. If they have such a weak circlip/poor design then maybe it should be fixed. Or maybe people shouldn't be buying their products considering the lack of instructions and explainations provided by them.
Mine work just fine pre-loaded to as I've stated ~0.060", must be magic...
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From: BFE
Originally Posted by LS1 Swapper
Here we go again
https://ls1tech.com/forums/showthread.php?t=376522
Not interested in arguing again, in fact I'm not going to waste my time with this topic no skin of my ***.
I don't know what Brian is saying but if the lifter is pre-loaded cold(and hot) how is the circlip going to effect anything? With low preload, resulting in hot lash I could see an issue on the circlip.
I really think comp needs to spend a lot more time explaining their lifters, and these issues. If they have such a weak circlip/poor design then maybe it should be fixed. Or maybe people shouldn't be buying their products considering the lack of instructions and explainations provided by them.
Mine work just fine pre-loaded to as I've stated ~0.060", must be magic...
https://ls1tech.com/forums/showthread.php?t=376522
Not interested in arguing again, in fact I'm not going to waste my time with this topic no skin of my ***.
I don't know what Brian is saying but if the lifter is pre-loaded cold(and hot) how is the circlip going to effect anything? With low preload, resulting in hot lash I could see an issue on the circlip.
I really think comp needs to spend a lot more time explaining their lifters, and these issues. If they have such a weak circlip/poor design then maybe it should be fixed. Or maybe people shouldn't be buying their products considering the lack of instructions and explainations provided by them.
Mine work just fine pre-loaded to as I've stated ~0.060", must be magic...
You simply cannot adjust preload via nonadjustable rockers.
Also what is you cam? just out of curiosity?