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Re: Push rod length question.
[Re: JohnRR]
#298625
04/30/09 10:04 AM
04/30/09 10:04 AM
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Joined: May 2003
Posts: 15,487
Florida
scratchnfotraction
I Live Here
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I Live Here
Joined: May 2003
Posts: 15,487
Florida
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I have had more than a few hot and have the ticking sound "metalic sounding" pinging sound from the heat cycle cool down the engine its self is ping not the valves same as headers would make noise the inside of the engine will do the same thing check for the right pr IMO 
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Re: Push rod length question.
[Re: scratchnfotraction]
#298626
04/30/09 10:57 AM
04/30/09 10:57 AM
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Joined: Jan 2006
Posts: 587
IL . usa
cjs69mope
mopar
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mopar
Joined: Jan 2006
Posts: 587
IL . usa
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IMO .025 or even .100 differance in push rod length could be adjusted for with the adjustment screw of most aftermarket roller rockers . if i am wrong ,maybe some one could chime in and explain why .
1969 Dodge Charger
1969 Dodge Superbee
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Re: Push rod length question.
[Re: jhkintx]
#298627
04/30/09 11:18 AM
04/30/09 11:18 AM
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Joined: Jan 2003
Posts: 75,047
U.S.S.A.
JohnRR
I Win
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I Win
Joined: Jan 2003
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U.S.S.A.
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Quote:
No frustration with any responders to my question. I truly value the experiece of this forum and appreciate all that respond.
So, If I target lifter bleed down as a starting point would this indicate pushrods that are too short or too long?
Thanks,
The pushrods would be too long , think about it if they were too short they wouldn't hold the valve open when they were supposed to be closed .
How many miles on the lifters , they shouldn't all be bleeding down that quickly as some valves are supposed to be open when the engine is shut off so that will tell me there is a lot of clearance in the plunger to body ???
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Re: Push rod length question.
[Re: cjs69mope]
#298628
04/30/09 11:21 AM
04/30/09 11:21 AM
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Joined: Jan 2003
Posts: 75,047
U.S.S.A.
JohnRR
I Win
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I Win
Joined: Jan 2003
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Quote:
IMO .025 or even .100 differance in push rod length could be adjusted for with the adjustment screw of most aftermarket roller rockers . if i am wrong ,maybe some one could chime in and explain why .
Yes it could if they are too short , too long the .025 yes but not the .100 , typically you want 2 to 3 threads of the adjuster below the rocker body , more the pushrod is too short , less it's too long and will cause issues including blocking the oil path to the pushrod adjuster contact point.
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Re: Push rod length question.
[Re: JohnRR]
#298629
04/30/09 11:47 AM
04/30/09 11:47 AM
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Joined: Jan 2003
Posts: 16,123
Grand Haven, MI
patrick
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 16,123
Grand Haven, MI
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Quote:
Quote:
IMO .025 or even .100 differance in push rod length could be adjusted for with the adjustment screw of most aftermarket roller rockers . if i am wrong ,maybe some one could chime in and explain why .
Yes it could if they are too short , too long the .025 yes but not the .100 , typically you want 2 to 3 threads of the adjuster below the rocker body , more the pushrod is too short , less it's too long and will cause issues including blocking the oil path to the pushrod adjuster contact point.
where did he say he was using aftermarket rockers? he's using magnum heads, OEM (non adjustible pedestal mount) rockers are 1.6 ratio.
1976 Spinnaker White Plymouth Duster, /6 A833OD
1986 Silver/Twilight Blue Chrysler 5th Ave HotRod **SOLD!***
2011 Toxic Orange Dodge Charger R/T
2017 Grand Cherokee Overland
2014 Jeep Cherokee Latitude (holy crap, my daughter is driving)
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Re: Push rod length question.
[Re: JohnRR]
#298630
04/30/09 11:56 AM
04/30/09 11:56 AM
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Joined: Aug 2004
Posts: 229
Carmel, IN
jhkintx
OP
enthusiast
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OP
enthusiast
Joined: Aug 2004
Posts: 229
Carmel, IN
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Quote:
Quote:
No frustration with any responders to my question. I truly value the experiece of this forum and appreciate all that respond.
So, If I target lifter bleed down as a starting point would this indicate pushrods that are too short or too long?
Thanks,
The pushrods would be too long , think about it if they were too short they wouldn't hold the valve open when they were supposed to be closed .
How many miles on the lifters , they shouldn't all be bleeding down that quickly as some valves are supposed to be open when the engine is shut off so that will tell me there is a lot of clearance in the plunger to body ???
The lifters (comp cams) were new when installed, they have less than 2000 miles on them. When I finished the head converstion I took the car to a mopar shop in Texas for a tune up. The mechanic (an old time mopar guy) said all was good except for the timing; he couldnt get the timing marks to show up so he set be feel. I assumed since this guy had a great reputation that I had the best tune for what I had. I'm not to sure anymore and just want to get the most out of the mods. This set up on a hot humid Texas day dynoed at 237 RWHP. I was told that was respectable and left well enough alone. At this point I just want to be sure all is good inside.
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Re: Push rod length question.
[Re: jhkintx]
#298631
04/30/09 01:32 PM
04/30/09 01:32 PM
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Joined: Dec 2006
Posts: 1,178
Indy
FlyFish
super stock
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super stock
Joined: Dec 2006
Posts: 1,178
Indy
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Why not just pull a valve cover and take a peek?
67 Barracuda street car, 408, e85, 1.38 60', 6.44 @105.9 in the 1/8 mile, 10.19 @130.5 in the 1/4...so far....
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Re: Push rod length question.
[Re: patrick]
#298633
04/30/09 01:47 PM
04/30/09 01:47 PM
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Joined: Jan 2003
Posts: 75,047
U.S.S.A.
JohnRR
I Win
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I Win
Joined: Jan 2003
Posts: 75,047
U.S.S.A.
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Quote:
Quote:
Quote:
IMO .025 or even .100 differance in push rod length could be adjusted for with the adjustment screw of most aftermarket roller rockers . if i am wrong ,maybe some one could chime in and explain why .
Yes it could if they are too short , too long the .025 yes but not the .100 , typically you want 2 to 3 threads of the adjuster below the rocker body , more the pushrod is too short , less it's too long and will cause issues including blocking the oil path to the pushrod adjuster contact point.
where did he say he was using aftermarket rockers? he's using magnum heads, OEM (non adjustible pedestal mount) rockers are 1.6 ratio.
I was thinking the same thing , I left out at the end of reply ...
This is all well and good but doesn't help the thread starter since he didn't say he had adjustable rockers ...
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Re: Push rod length question.
[Re: JohnRR]
#298635
04/30/09 02:57 PM
04/30/09 02:57 PM
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Joined: May 2003
Posts: 15,487
Florida
scratchnfotraction
I Live Here
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I Live Here
Joined: May 2003
Posts: 15,487
Florida
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it is a slider cam and you better look at the lobes and lifters maybe might be the quik bleed down of the lifters and valves shuting  could explane down on power and rough idle  but again if it did not line up...a damper could have sliped what kinda chain and gears it got for timming? are they set up correct? reatrd..advanced...striaght up? what springs ya runnin on the mag heads? whats the spring seat rate? 
Last edited by scratchnfotraction; 04/30/09 03:02 PM.
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Re: Push rod length question.
[Re: scratchnfotraction]
#298636
05/01/09 06:34 AM
05/01/09 06:34 AM
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Joined: Aug 2004
Posts: 229
Carmel, IN
jhkintx
OP
enthusiast
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OP
enthusiast
Joined: Aug 2004
Posts: 229
Carmel, IN
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Quote:
it is a slider cam and you better look at the lobes and lifters maybe
might be the quik bleed down of the lifters and valves shuting
could explane down on power and rough idle
but again if it did not line up...a damper could have sliped
what kinda chain and gears it got for timming?
are they set up correct? reatrd..advanced...striaght up?
what springs ya runnin on the mag heads?
whats the spring seat rate?
As for the timing chain; it is a generic Auto Zone item "straight up". I cannot answer the spring and spring rate question, when I had my heads done I gave them the cam specs and they said it would be taken care of.
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Re: Push rod length question.
[Re: jhkintx]
#298637
05/01/09 07:53 AM
05/01/09 07:53 AM
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Joined: May 2003
Posts: 15,487
Florida
scratchnfotraction
I Live Here
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I Live Here
Joined: May 2003
Posts: 15,487
Florida
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vauto zone china crap straight up have you tryed pulling the vc and chcking it with them off? sound like that would be my next trick  maybe alittle messy if the engine is clean,but would rather have an oil stained engine than a broke one I cant figure the "can feel it" part and 30 sec is a long time to "feel" the vc ticking  I would just check to see if all the rockers are moving about the same,give the springs a looky see for any broke ones maybe do you trust the machince shop that said it would be taken care of?  if they left stock mag springs on that cam they might be a prob in Houston  I would also pull #1 plug and bring it up to TDC and check dist/cap/rotor/wires/damper to see if its off time...I dont like the cant line it up thing....junk t-chain and gears could be off it could be the damper has slide and marks not lining up I guess by feel he ment "feeling the piston down the plug hole" and setting the dist/oil drive in fase with the cam IMO..get it up to temp and then pull the vc,run and shut down and  
Last edited by scratchnfotraction; 05/01/09 08:02 AM.
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