Pushrod length/adjuster threads - Moparts Forums

Register Log In Moparts Forums Unlawfl's Race & Engine Tech Pushrod length/adjuster threads

Print Thread

Page 1 of 2

1

2

Pushrod length/adjuster threads #775601 08/17/10 12:37 AM 08/17/10 12:37 AM
Joined: Oct 2003 Posts: 3,698 NE Oklahoma V Von OP master
Von OP master V Joined: Oct 2003 Posts: 3,698 NE Oklahoma	If you had no choice, would you rather have 1.25-1.5 thread sticking out of the bottom of the rocker or 3.5 threads? Yeah, I know neither is right. But, money is tight (My employer is taking away my travel check (my fun money) so one of them will have to do) and I need to use what I have. Thanks 72 RR, Pump gas 440, 452s, 3800 lbs, Corked, ET Radials,. 11.33@117.72. Same car, bone stock 346s, 9.5 comp, baby solid. 12.24@110.

Re: Pushrod length/adjuster threads [Re: Von] #775602 08/17/10 12:51 AM 08/17/10 12:51 AM
Joined: Jun 2003 Posts: 52,972 Romeo MI MR_P_BODY Master
MR_P_BODY Master Joined: Jun 2003 Posts: 52,972 Romeo MI	1.25-1.5... it'll be closer to the proper geometry IF it still oils properly

Re: Pushrod length/adjuster threads [Re: MR_P_BODY] #775603 08/17/10 01:30 AM 08/17/10 01:30 AM
Joined: Nov 2003 Posts: 6,293 Rock Springs Bob_Coomer master
Bob_Coomer master Joined: Nov 2003 Posts: 6,293 Rock Springs	Whats the rocker arm manufacture say? Jesel calls for 3/4 thread as idea, no more than 1 1/2......If I am at 1 1/2 thread IMO its pretty good shape....3 treads is too much, and I would be looking at longer push rods, or at least adding lash caps and checking things out... Again check with the rocker company.. [color:"red"]65 Hemi Belvedere coming soon [/color] [color:"#00FF00"]557" Indy engine 1.07 60ft 144mph in the 8th 2100 lbs package [/color]

Re: Pushrod length/adjuster threads [Re: Von] #775604 08/17/10 01:35 AM 08/17/10 01:35 AM
Joined: Jul 2010 Posts: 1,491 Oologah, Oklahoma Big Squeeze pro stock
Big Squeeze pro stock Joined: Jul 2010 Posts: 1,491 Oologah, Oklahoma	Quote: If you had no choice, would you rather have 1.25-1.5 thread sticking out of the bottom of the rocker or 3.5 threads? Yeah, I know neither is right. But, money is tight (My employer is taking away my travel check (my fun money) so one of them will have to do) and I need to use what I have. Thanks Hey PVP......I've got a few extra sets of pushrods laying around.....Bring by what you have and we can see if I have something that'll work better........ If you can't handle the truth, you're living a lie.......

Re: Pushrod length/adjuster threads [Re: Bob_Coomer] #775605 08/17/10 02:05 AM 08/17/10 02:05 AM
Joined: Oct 2003 Posts: 3,698 NE Oklahoma V Von OP master
Von OP master V Joined: Oct 2003 Posts: 3,698 NE Oklahoma	Quote: Whats the rocker arm manufacture say? The rockers are bronze bushed factory adjustables, so I have no idea what the factory spec is. Anybody know? 72 RR, Pump gas 440, 452s, 3800 lbs, Corked, ET Radials,. 11.33@117.72. Same car, bone stock 346s, 9.5 comp, baby solid. 12.24@110.

Re: Pushrod length/adjuster threads [Re: Big Squeeze] #775606 08/17/10 02:08 AM 08/17/10 02:08 AM
Joined: Oct 2003 Posts: 3,698 NE Oklahoma V Von OP master
Von OP master V Joined: Oct 2003 Posts: 3,698 NE Oklahoma	Quote: Hey PVP......I've got a few extra sets of pushrods laying around.....Bring by what you have and we can see if I have something that'll work better........ I may take you up on that!! Ive got some rough measurements. Depending on which adjusters I use I need either 9.040 effective length or 9.140. Got anything close? Thanks, you big 72 RR, Pump gas 440, 452s, 3800 lbs, Corked, ET Radials,. 11.33@117.72. Same car, bone stock 346s, 9.5 comp, baby solid. 12.24@110.

Re: Pushrod length/adjuster threads [Re: Von] #775607 08/17/10 02:20 AM 08/17/10 02:20 AM
Joined: Oct 2003 Posts: 3,698 NE Oklahoma V Von OP master
Von OP master V Joined: Oct 2003 Posts: 3,698 NE Oklahoma	BTW, by swapping adjusters (2 different sets of adjusters) I can get 1.5 threads with one set and 4.5 threads with the other set, same pushrods. Obviously the "number of threads showing out of the bottom" isnt that accurate. Is there an optimum distance from cup to rocker, or is it "get in a ballpark measurement"? Hope that makes sense. 72 RR, Pump gas 440, 452s, 3800 lbs, Corked, ET Radials,. 11.33@117.72. Same car, bone stock 346s, 9.5 comp, baby solid. 12.24@110.

Re: Pushrod length/adjuster threads [Re: Von] #775608 08/17/10 09:56 AM 08/17/10 09:56 AM
Joined: Oct 2007 Posts: 4,206 New York polyspheric master
polyspheric master Joined: Oct 2007 Posts: 4,206 New York	Leaving out any oil or interference problem: the smallest possible adjuster has the highest rocker ratio. No threads at all is best, but you need some adjustment somewhere. The actual distance from the rocker body to the adjuster ball or cup is what matters, not the threads. The number of threads is only important in that the adjuster is more likely to break. However: it may push your geometry over the cliff. Every time someone says "use lash caps" I get a headache. I'd ask everyone who doesn't understand this to refrain from commenting - but everyone knows I'm not talking about them..... Boffin Emeritus

Re: Pushrod length/adjuster threads [Re: polyspheric] #775609 08/17/10 12:12 PM 08/17/10 12:12 PM
Joined: Jun 2007 Posts: 2,646 Plymouth Meeting, PA bigtimeauto Trophy Winner
bigtimeauto Trophy Winner Joined: Jun 2007 Posts: 2,646 Plymouth Meeting, PA	Quote: However: it may push your geometry over the cliff. Every time someone says "use lash caps" I get a headache. i'll bite how will the rocker adjustment change the geometry on a shaft system? A lash cap will barely do it,after that you need shims or mill the head stands to change it. to many threads down will only break the adjuster or block oil from coming out of some screws. BB, TT5,Procharged 3300lb Street Car 4.79/154

Re: Pushrod length/adjuster threads [Re: bigtimeauto] #775610 08/17/10 03:15 PM 08/17/10 03:15 PM
Joined: Oct 2007 Posts: 4,206 New York polyspheric master
polyspheric master Joined: Oct 2007 Posts: 4,206 New York	Is that a question, or a statement? Boffin Emeritus

Re: Pushrod length/adjuster threads [Re: polyspheric] #775611 08/17/10 03:21 PM 08/17/10 03:21 PM
Joined: Jun 2007 Posts: 2,646 Plymouth Meeting, PA bigtimeauto Trophy Winner
bigtimeauto Trophy Winner Joined: Jun 2007 Posts: 2,646 Plymouth Meeting, PA	Quote: Is that a question, or a statement? that would be a question about your statement BB, TT5,Procharged 3300lb Street Car 4.79/154

Re: Pushrod length/adjuster threads [Re: bigtimeauto] #775612 08/17/10 03:29 PM 08/17/10 03:29 PM
Joined: Oct 2007 Posts: 4,206 New York polyspheric master
polyspheric master Joined: Oct 2007 Posts: 4,206 New York	Fine, we'll do it your way. Your first remark appears to be a question, but you followed it with a statement that pretty much says it doesn't. It does. your turn. Boffin Emeritus

Re: Pushrod length/adjuster threads [Re: polyspheric] #775613 08/17/10 04:04 PM 08/17/10 04:04 PM
Joined: Jun 2007 Posts: 2,646 Plymouth Meeting, PA bigtimeauto Trophy Winner
bigtimeauto Trophy Winner Joined: Jun 2007 Posts: 2,646 Plymouth Meeting, PA	You want to play instead of answering my question thats fine. "However: it may push your geometry over the cliff." You said adjusting the rocker arm affects geometry, i asked why would you say that and asked for your reasoning. BB, TT5,Procharged 3300lb Street Car 4.79/154

Re: Pushrod length/adjuster threads [Re: bigtimeauto] #775614 08/17/10 04:10 PM 08/17/10 04:10 PM
Joined: Jan 2003 Posts: 25,894 United Socialist States of Ame... T tboomer Too Many Posts
tboomer Too Many Posts T Joined: Jan 2003 Posts: 25,894 United Socialist States of Ame...	Quote: You said adjusting the rocker arm affects geometry, i asked why would you say that and asked for your reasoning. I am with Bob here...Poly...Maybe we can all learn something... Need your rear end checked out? Contact Grizzly!!

Re: Pushrod length/adjuster threads [Re: tboomer] #775615 08/17/10 04:18 PM 08/17/10 04:18 PM
Joined: Mar 2007 Posts: 12,008 Finally a HUSKER again Moparnut426 I Live Here
Moparnut426 I Live Here Joined: Mar 2007 Posts: 12,008 Finally a HUSKER again	Im curious also,,, You would be raising, lowering the adjuster, just where the pushrod makes mechanical contact with the rocker. Changing the geometry would mean you would physically move the fulcrum up, down, inn or out changine where it makes physical contact with the spring, or changing the ratio by moving the adjuster in, or out from the fulcrum. Kasey

Re: Pushrod length/adjuster threads [Re: bigtimeauto] #775616 08/17/10 04:31 PM 08/17/10 04:31 PM
Joined: Jun 2007 Posts: 2,646 Plymouth Meeting, PA bigtimeauto Trophy Winner
bigtimeauto Trophy Winner Joined: Jun 2007 Posts: 2,646 Plymouth Meeting, PA	Quote: Quote: However: it may push your geometry over the cliff. Every time someone says "use lash caps" I get a headache. i'll bite how will the rocker adjustment change the geometry on a shaft system? A lash cap will barely do it,after that you need shims or mill the head stands to change it. to many threads down will only break the adjuster or block oil from coming out of some screws. a simple i wasn't thinking clear is good for me BB, TT5,Procharged 3300lb Street Car 4.79/154

Re: Pushrod length/adjuster threads [Re: bigtimeauto] #775617 08/17/10 05:08 PM 08/17/10 05:08 PM
Joined: Dec 2003 Posts: 531 USA 5 540DUSTER mopar
540DUSTER mopar 5 Joined: Dec 2003 Posts: 531 USA	The old direct connection book says that the ball should be 5/16 from the rocker arm.Not all adjusters are the same.I have seen it with my own eyes that when the ball is closer to the rocker;the folcum will be closer to the shaft and will lift the valve more.Its not much but it happens.

Re: Pushrod length/adjuster threads [Re: 540DUSTER] #775618 08/17/10 05:12 PM 08/17/10 05:12 PM
Joined: Jun 2007 Posts: 2,646 Plymouth Meeting, PA bigtimeauto Trophy Winner
bigtimeauto Trophy Winner Joined: Jun 2007 Posts: 2,646 Plymouth Meeting, PA	Quote: The old direct connection book says that the ball should be 5/16 from the rocker arm.Not all adjusters are the same.I have seen it with my own eyes that when the ball is closer to the rocker;the folcum will be closer to the shaft and will lift the valve more.Its not much but it happens. nobody is talking lift we are talking geometry BB, TT5,Procharged 3300lb Street Car 4.79/154

Re: Pushrod length/adjuster threads [Re: bigtimeauto] #775619 08/17/10 05:34 PM 08/17/10 05:34 PM
Joined: Dec 2003 Posts: 531 USA 5 540DUSTER mopar
540DUSTER mopar 5 Joined: Dec 2003 Posts: 531 USA	If the ball is closer to the shaft ,the geometry changes.

Re: Pushrod length/adjuster threads [Re: bigtimeauto] #775620 08/17/10 05:37 PM 08/17/10 05:37 PM
Joined: Jun 2003 Posts: 52,972 Romeo MI MR_P_BODY Master
MR_P_BODY Master Joined: Jun 2003 Posts: 52,972 Romeo MI	Quote: Quote: The old direct connection book says that the ball should be 5/16 from the rocker arm.Not all adjusters are the same.I have seen it with my own eyes that when the ball is closer to the rocker;the folcum will be closer to the shaft and will lift the valve more.Its not much but it happens. nobody is talking lift we are talking geometry What occurs when you change the adjuster is it starts putting a lot of side load and reducing the lift.. it in i self(adjuster) doesnt change the valve/rocker geometry

Page 1 of 2

1

2

Moderated by Al_Alguire, Hotwheelsjr, moparts, not_a_charger, RangerDan440, tboomer

Hop To

Powered by UBB.threads™ PHP Forum Software 7.7.1