valve retainer to seal clearance-thinner seals?
 

so, without any seals i have .750 of valve travel. with OE umbrellas i have .580 of travel. i would like to get 550 lift. is there an umbrella seal with a thinner roof to get more clearance without machining guides? 3/8ths stems. oval port.

i've seen some for chrysler 440's that are thin umbralla's.

Guide cutting tool isnt that expensive . https://www.youtube.com/watch?v=7aTXiay8M9k just take your time .GOOD LUCK!!!

or just run it without seals,you wont be the first guy to do it.

ordered a set of comp cams seals. should be in today. will report back with diff in thickness to OEM. i am sure quite a few of us want to go from 480 to 530-560 or so lift and it would be nice to be ok without needing machine work...

let me know,,I can dig some up at the shop and send them to you.

Come on Mike.. why would you post crap like that? Someone on here might think its ok and actually do it. Your not letting Alex get to you.. are you?

not crap.im dead serious.i have seen guys do it.alex who?i took a sbc apart one time that had 150 thousand hard miles on it.no signs of valve seals but it still ran good,just a little tired.

usually only on the exhaust,,and when the guides are extra high or the springs have the damper in them.also,the valves will get the little o-ring that goes in the second groove of the valve stem.

When I raced circle track in the 1990's , It was pretty common not to run ANY seals . Different schools of thought , trends , ect.

I think just about all of the 87-95 sbc didn't use exhaust valve seals.

FYI I have not run valve seals intake or exhaust in my marine engines for the last 15 years, my car engines do have them! It depends on what school of thought you have been trained on and more important your particular induction system. I like it when people laugh at me when I start my boat after sitting rafted for hours. (Blue Smoke) I tell everyone the engine is real tired and needs a lot of work ........they never ask again!

back in my drag race days i ran blown alcohol,never had valve seals.i also have done some blown gas engines with no seals,i did not want to post it because lately around here if someone disagrees it seems to start a chitstorm so please dont tell me about what your super builder said.I DON,T CARE.

Contrary to what some say, Mike is no rookie. Abones is another extremely knowledgeable man who has been around engines a long time. No "crap" there.

the real diff is it takes 100k plus miles to make guides wear enough to smoke all the time. we don't generally wear engines out in boats, cept for sportfish that run out to canyon and back constantly. we either break them or get water in them and break them. but i am running a set of L29 truck heads with some guide wear so i am taking a belt sander to a set of new valve seals and looks like i get 600 free travel till retainer hits seal. will give me about 060 clearance. and on that note, once a hyd roller lifter is pumped up, is there any diff between lobe lift times 1.7 and the actual distance the valve travels?

cheeper lifters can bleed down so while the 1.7 ratio does not change,the actual amount of lift can be a little less.

OEM lifters qualify as cheaper ones? about what percentage do they lose? and long as i have you on the phone, i think you have a set of mag standard pistons-rods you are willing to part with?

i don,t know the answer to the first question,yes 365 mag pistons&rods.they look good,no damage,did a build for another oso member and these are the takeouts.

Well I stand corrected... I know some run with no exhaust guides, but was of the understanding that if non were used on the intake, you would suck oil in the combustion chamber & raise the chance of detonation.
Also I am not one of the peeps that think Mike is a rookie... I like to read all his posts... not saying that I agree with all of them,LOL... But I can tell he has been around the block. (no pun intended)

The beauty is we all don't need to agree, but we all can learn something from each other.

Can't believe nobody has a opinion on sucking oil in through the intake valve, and raising the chance of detonation.

on a supercharged engine when it is in boost the guides are also under boost so they are not sucking,at least not until boost stops and vac starts and a very small trace of oil in vac is ok,just my opinion.

Sounds like something that I said- but has harshly jumped all over for saying it! Thanks for using my words…...

i read a line in a car forum i thought was funny.."arguing on the internet is like participating in the special olympics. even when you win you are retarded!"

Still wanna keep going I see.

Why don't you have a glass of cranberry juice. It helps my wife on those heavy menstrual cycles.

I never ran seals on my 6000+HP funnycar

I like to think when someone claims to do PRECISION machining, that's exactly what they mean... when a bronze valve guide is used the valve stem clearance is run much tighter than with the cast guides... thus in effect the seal is rendered somewhat useless more of an insurance policy than anything!!! there I said it... I must be an IDIOT too!!!