Re: Would pushrod length make this much difference?
[Re: BradH]
#2448199
02/07/18 09:13 PM
02/07/18 09:13 PM
|
Joined: Dec 2007
Posts: 12,593 Great Neck,LI,new york
hemi-itis
I Live Here
|
I Live Here
Joined: Dec 2007
Posts: 12,593
Great Neck,LI,new york
|
Pushrod oiling is the answer to anything that has an issue with burnt cups.
HEMI-ITIS has no cure. My condition is fully BLOWN!!
|
|
|
Re: Would pushrod length make this much difference?
[Re: BradH]
#2448280
02/08/18 12:35 AM
02/08/18 12:35 AM
|
Joined: Jan 2003
Posts: 6,591 Canton, Ohio
Sport440
master
|
master
Joined: Jan 2003
Posts: 6,591
Canton, Ohio
|
Your pics don't give the minute differences justice.
Longer pushrod equals more max lift while a shorter pushrod gives quicker more mid lift but with less max lift.
Significant difference??, in the scheme of the whole overall lift event, either way, long/short pushrod, doesn't make any significant difference in performance on the engine involved. The valve train, does like the longer pushrod though, less stress on the rocker arm because of the lesser angles involved. IMO
|
|
|
Re: Would pushrod length make this much difference?
[Re: BradH]
#2448310
02/08/18 01:47 AM
02/08/18 01:47 AM
|
Joined: Oct 2007
Posts: 4,219 New York
polyspheric
master
|
master
Joined: Oct 2007
Posts: 4,219
New York
|
The minimum adjuster length isn't a specific number of turns. What matters: 1. no contact throughout the range of travel 2. enough adjustment to get lash
Boffin Emeritus
|
|
|
Re: Would pushrod length make this much difference?
[Re: BradH]
#2448348
02/08/18 04:37 AM
02/08/18 04:37 AM
|
Joined: Aug 2003
Posts: 43,719 Bend,OR USA
Cab_Burge
I Win
|
I Win
Joined: Aug 2003
Posts: 43,719
Bend,OR USA
|
I've seen adjusters and pushrod cups broken off due to using to short of pushrods, way to short To long can and may beat up the bottom of the rockers also so my choice is to see between 1/8 of a thread to three complete threads max exposed under the rocker arms As already mention on the single shaft T&D system they like 1 1/2 turns out to three turns out max on their adjusters for oiling the push rods properly I think I have 1 1/2 threads exposed on my 440-1 with the Jesel pair shaft system with pushrod and spray bar oiling
Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
|
|
|
Re: Would pushrod length make this much difference?
[Re: Stanton]
#2448629
02/08/18 06:13 PM
02/08/18 06:13 PM
|
Joined: Jan 2003
Posts: 15,439 Val-haul-ass... eventually
BradH
OP
Taking time off to work on my car
|
OP
Taking time off to work on my car
Joined: Jan 2003
Posts: 15,439
Val-haul-ass... eventually
|
The lobe lift only changed because I reversed-engineered the lobe lift for the same valve lift to account for the ratio change. If I'd left the lobe lift the same, then I'd have had to increase the lift curve on the valve side. It was simpler to leave the rest of the rocker diagram the same and only tweak the pushrod adjuster arc to match the ratio difference.
Last edited by BradH; 02/08/18 06:16 PM.
|
|
|
Re: Would pushrod length make this much difference?
[Re: Stanton]
#2448661
02/08/18 07:42 PM
02/08/18 07:42 PM
|
Joined: Jan 2003
Posts: 14,531 So. Burlington, Vt.
fast68plymouth
I Live Here
|
I Live Here
Joined: Jan 2003
Posts: 14,531
So. Burlington, Vt.
|
Be a good excercise with the rocker on the head, an adjustable pushrod, a checking spring, and a dial indicator.
68 Satellite, 383 with stock 906’s, 3550lbs, 11.18@123 Dealer for Comp Cams/Indy Heads
|
|
|
Re: Would pushrod length make this much difference?
[Re: BradH]
#2449070
02/09/18 01:08 PM
02/09/18 01:08 PM
|
Joined: Jan 2016
Posts: 216 America
WedgeFED
enthusiast
|
enthusiast
Joined: Jan 2016
Posts: 216
America
|
|
|
|
Re: Would pushrod length make this much difference?
[Re: Cab_Burge]
#2449182
02/09/18 06:41 PM
02/09/18 06:41 PM
|
Joined: Sep 2014
Posts: 4,457 Washington
madscientist
master
|
master
Joined: Sep 2014
Posts: 4,457
Washington
|
I wonder if these instructions apply to stud mounted rockers only? Nope. Adjuster position affects geometry on stud and shaft rockers.
Just because you think it won't make it true. Horsepower is KING. To dispute this is stupid. C. Alston
|
|
|
|
|