Re: How do roller rockers improve performance?
[Re: JohnRR]
#1631053
06/09/14 03:55 PM
06/09/14 03:55 PM
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Joined: Aug 2003
Posts: 12,589 Sacramento, CA
cal_gecko
OP
I Live Here
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OP
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Joined: Aug 2003
Posts: 12,589
Sacramento, CA
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Quote:
Those rockers would improve performance because of the ratio change from what your current rockers are , CLAIMED 1.5 , to a claimed 1.6 , increase lift and duration without a cam change.
There is no real performance gain by just switching to a roller tipped rocker.
The quality of those rockers ???
Rockers arms are one place to not buy cheap Chinese junk . Ask those that bought off shore big block rockers because they were CHEAP , only to have them cause a dropped valve ...
Wow .. are those considered 'cheap'? $400+ ?
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Re: How do roller rockers improve performance?
[Re: cal_gecko]
#1631054
06/09/14 03:58 PM
06/09/14 03:58 PM
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Joined: Feb 2005
Posts: 28,312 Cincinnati, Ohio
Challenger 1
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Cincinnati, Ohio
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Quote:
Friend of mine told me I should ditch the factory shaft-mounted rockers on my 360 (non-Magnum) and go with something like this: http://www.ebay.com/itm/PRW-SB-Mopar-273...30f&vxp=mtr
Said it would be a significant performance improvement. How does this improve performance?
For a LA SB I would stay with 1.5 rockers, with a good set of aftermarket 1.5s, your going to have more lift than from stock rockers and a little less friction.
I wouldn't call it significant even with 1.6 rockers.
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Re: How do roller rockers improve performance?
[Re: autoxcuda]
#1631056
06/09/14 04:09 PM
06/09/14 04:09 PM
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Joined: Aug 2003
Posts: 12,589 Sacramento, CA
cal_gecko
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thanks guys.. AutoXCuda - good memory on the cam yeah... snowball effect is not what I need. I'll just drive it and enjoy it
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Re: How do roller rockers improve performance?
[Re: cal_gecko]
#1631057
06/09/14 04:59 PM
06/09/14 04:59 PM
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Joined: Jan 2003
Posts: 27,480 So Cal
autoxcuda
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Quote:
...
yeah... snowball effect is not what I need (MORE OF).
...
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Re: How do roller rockers improve performance?
[Re: autoxcuda]
#1631060
06/09/14 05:10 PM
06/09/14 05:10 PM
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Joined: Aug 2003
Posts: 12,589 Sacramento, CA
cal_gecko
OP
I Live Here
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OP
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Joined: Aug 2003
Posts: 12,589
Sacramento, CA
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Quote:
Quote:
...
yeah... snowball effect is not what I need (MORE OF).
...
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Re: How do roller rockers improve performance?
[Re: autoxcuda]
#1631061
06/09/14 07:06 PM
06/09/14 07:06 PM
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Joined: Jan 2003
Posts: 5,907 Athens, Greece
Pyper70
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Athens, Greece
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I didn't even open the link in the OP...
PRW...Chinese junk....don't grenade a motor for that stuff...I bought the 44 Source for $400 many moons ago and never installed em for fear of those exploding needle bearings...Why ditch a motor for a couple hundred bucks...I bought Harlands and it runs like a dream
Family owned 1969 Charger R/T DualQuad 440/727/GVO/3.55s
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Re: How do roller rockers improve performance?
[Re: JohnRR]
#1631063
06/09/14 08:56 PM
06/09/14 08:56 PM
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Joined: Jan 2003
Posts: 5,447 So Cal
Sinitro
master
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master
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Posts: 5,447
So Cal
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Quote:
Those rockers would improve performance because of the ratio change from what your current rockers are , CLAIMED 1.5 , to a claimed 1.6 , increase lift and duration without a cam change.
There is no real performance gain by just switching to a roller tipped rocker.
The quality of those rockers ???
Rockers arms are one place to not buy cheap Chinese junk . Ask those that bought off shore big block rockers because they were CHEAP , only to have them cause a dropped valve ...
Are U aware the PRW rockers are made in China... Most likely made from recycled Coors cans... The valve train is not a place to save $ buy the quality proven brands..
Just my $0.05...
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Re: How do roller rockers improve performance?
[Re: DaytonaTurbo]
#1631064
06/09/14 10:42 PM
06/09/14 10:42 PM
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Joined: Feb 2005
Posts: 4,320 Prospect, PA
BSB67
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Prospect, PA
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Quote:
....often in the 1.4 range.....
And the number keeps getting lower.
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Re: How do roller rockers improve performance?
[Re: BSB67]
#1631065
06/09/14 11:10 PM
06/09/14 11:10 PM
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Joined: Jan 2003
Posts: 27,421 Balt. Md
383man
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Balt. Md
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In theory the roller has less drag to loosen up hp. How much. Maybe none. One good thing they do is put less wear on the valve guide since the roller will glide across the top of the valve easier and not put as much push on the valve to the side when opening. But if I was spending $400 or more dollars and looking for a performance gain I would not be buying roller rockers. Ron
Last edited by 383man; 06/09/14 11:11 PM.
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Re: How do roller rockers improve performance?
[Re: 383man]
#1631067
06/09/14 11:15 PM
06/09/14 11:15 PM
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Joined: Jan 2003
Posts: 15,526 Omaha Ne
TJP
I Live Here
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Omaha Ne
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Quote:
In theory the roller has less drag to loosen up hp. How much. Maybe none. One good thing they do is put less wear on the valve guide since the roller will glide across the top of the valve easier and not put as much push on the valve to the side when opening. But if I was spending $400 or more dollars and looking for a performance gain I would not be buying roller rockers. Ron
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