Pushrod question.

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SWED67barracuda

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Hi . I`ve got problems with lifternoise . I run a lunati 268/276 voodo with recommended dual valvesprings ,spring rate 402 lbs./in. Comp cam mech, rockers . Microtrol lifters . Always loud clatter on startup , hot or cold and some while running too . oilpressure is no problem ,lots of it . Now , the pushrods are the oiling type with the hole you know , IS THIS THE PROBLEM? Should i run non oiling type ones , will it make the difference?
 
Have you checked your pushrod length? Lifter preload? 402 spring rate sounds pretty heavy to me I think the recommended for that cam is 342.
Correction its 363. The recommended valve spring is part number 72949. Here are the specs.
What springs are you running now?
I would start with the pushrod length and verify that's not the problem first tho

Screenshot_20200823-040055_Samsung Internet.jpg
 
Beskriv ljudet, vad har du för olja i? viskositet? vad är det för motor? topplock? geometrin för vipporna är väldigt viktigt också. Vad jag har läst mig till så är ju deras kamaxlar rätt aggressiva, tack vare designen på loberna.

Jag vet att lyftarna i USA har haft kvalitets problem så att det inte är det.

Många punkter som spelar in gällande felsökning.

Jag är ingen expert heller. men har haft likande problem med min gamla bil känner igen det.
 
Beskriv ljudet, vad har du för olja i? viskositet? vad är det för motor? topplock? geometrin för vipporna är väldigt viktigt också. Vad jag har läst mig till så är ju deras kamaxlar rätt aggressiva, tack vare designen på loberna.

Jag vet att lyftarna i USA har haft kvalitets problem så att det inte är det.

Många punkter som spelar in gällande felsökning.

Jag är ingen expert heller. men har haft likande problem med min gamla bil känner igen det.
Translated it for you buddy!
Describe the sound, what oil do you have in it? viscosity? what is the engine? cylinder head? the geometry of the lashes is very important as well. From what I have read, their camshafts are quite aggressive, thanks to the design of the lobes. I know that the lifters in the US have had quality problems so it is not. Many points that come into play regarding troubleshooting. I'm not an expert either. but have had similar problems with my old car recognize it.
 
Translated it for you buddy!
Describe the sound, what oil do you have in it? viscosity? what is the engine? cylinder head? the geometry of the lashes is very important as well. From what I have read, their camshafts are quite aggressive, thanks to the design of the lobes. I know that the lifters in the US have had quality problems so it is not. Many points that come into play regarding troubleshooting. I'm not an expert either. but have had similar problems with my old car recognize it.


he was swedish , so thats why answer in swedish lang.. :D hahahahah
 
Valvegear geometry is correct . Pushrods are 7.500. in. The springs are recommended by camcard . oil is 10-30 weight . Rockers are adjustable so preload is 1/4 turn from zero . Yes 402 lbs,/in. is a lot . My theory is that the lifters bleed out the through the pushrods since these rockers can be used on magnum engines that oil through rods. I`ve got J heads and they are oiled through rockershafts/heads . I just can`tsee how the lifters can bleed out so fast otherwise.

IMG_20200823_103203.jpg


IMG_20200823_102731.jpg
 
Valvegear geometry is correct . Pushrods are 7.500. in. The springs are recommended by camcard . oil is 10-30 weight . Rockers are adjustable so preload is 1/4 turn from zero . Yes 402 lbs,/in. is a lot . My theory is that the lifters bleed out the through the pushrods since these rockers can be used on magnum engines that oil through rods. I`ve got J heads and they are oiled through rockershafts/heads . I just can`tsee how the lifters can bleed out so fast otherwise.

View attachment 1715582853

View attachment 1715582854
What is you preload?
 
Hi . I`ve got problems with lifternoise . I run a lunati 268/276 voodo with recommended dual valvesprings ,spring rate 402 lbs./in. Comp cam mech, rockers . Microtrol lifters . Always loud clatter on startup , hot or cold and some while running too . oilpressure is no problem ,lots of it . Now , the pushrods are the oiling type with the hole you know , IS THIS THE PROBLEM? Should i run non oiling type ones , will it make the difference?
Are you running the AMC style of lifter that oils thru the pushrod?
 
The hollow “oil through” pushrods are not the problem.
It is more probable the pushrod length. However! The lifter itself could be at fault.
 
Why are you running oil thru pushrods with the rocker shaft set up???
It appears that his rockers are possibly Comp Cams or PDX (?) that have the cup adjusted instead of the ball adjuster which allows an oil through set up which is great for a LA head on a Magnum block.

The extra oiling doesn’t hurt anything.
 
I run oil through the pushrods (or do yr's hole aignment procedure)
Makes your hard stud balls hold up longer
not your problem
dbl chrck lengths
how far down are your balls
 
I run oil through the pushrods (or do yr's hole aignment procedure)
Makes your hard stud balls hold up longer
not your problem
dbl chrck lengths
how far down are your balls

That's getting kinda personal don't you think ! Lol
 
you can't just count threads for max length anymore as the length of the stud between and the ball is longer
3 thread max only works with the old short stud kind of adjusters
adjust too far out and you break your balls off
and geometry gets progressively worse
cup adjusters allow longer pushrods as there is no cup to hit the rocker
longer pushrods help geometry
unfortunatly nothing helps the bad lifter angle-- well shorter lifters
or offset pushod rockers
run the stifest pushrod you can fit
 
I run oil through the pushrods (or do yr's hole aignment procedure)
Makes your hard stud balls hold up longer
not your problem
dbl chrck lengths
how far down are your balls


LMAO! This reads like a **** movie segment.

Wyrm.... you need to expand a bit on your replies.
The adjusters ball end should be referred like that and not just “Your balls” since my balls are none of your biz!
:rofl:
 
I'm with Rumblefish on this one..
Check your lifters. Inexpensive lifters (cheap check valves) won't hold higher spring pressures.
Back in the day, we used to trade out the plungers and valves from a lifter brand that didn't use them in a 904 lifter.
Solved the problem.
Manufacturers caught on and started implementing this strategy, but at a cost. Well worth it.
 
I'm with Rumblefish on this one..
Check your lifters. Inexpensive lifters (cheap check valves) won't hold higher spring pressures.
Back in the day, we used to trade out the plungers and valves from a lifter brand that didn't use them in a 904 lifter.
Solved the problem.
Manufacturers caught on and started implementing this strategy, but at a cost. Well worth it.
He siad he has lunati microtrol lifters they are supposed to be top of the line.
 
I had to disassemble almost all of my lifters because even the spring pressure would not collapse them. It’s like they sat on a shelf for 50 years. Once I did that, they operated just fine. What a PIA
 
He siad he has lunati microtrol lifters they are supposed to be top of the line.

Yeah.... I'd look anyway. If it has a disc for a check, instead of a ball, that's going to be it.
 
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