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rezonator
Dodge Dakota
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8/12/2007
16:45:45
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 Subject: LOOKING FOR ROCKERS
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LOOKING FOR 1.7 ROCKERS FOR 99 318
E-MAIL ME
REZLERD@AOL.COM
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Woodrow
Dodge Dakota
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8/12/2007
22:40:25
| RE: LOOKING FOR ROCKERS
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Try Southeast performance. That is where I got mine. They aren't cheap though. Like $340 or something like that.
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.boB
Dodge Dakota
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8/13/2007
13:05:24
| RE: LOOKING FOR ROCKERS
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Viper arms from Dodge. <$100.
http://www.dodgedakota.net/boards/per/13525.html
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Forseti
Dodge Dakota
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8/13/2007
17:15:06
| RE: LOOKING FOR ROCKERS
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Whats the part number bob and do you have any pics?
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.boB
Dodge Dakota
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8/14/2007
15:05:22
| RE: LOOKING FOR ROCKERS
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http://www.newdodgeparts.com/dodge-parts.htm
Don't have the exact part number, I threw the package away.
I didn't take any pictures. They look exactly like the stock 5.2/5.9 Magnum parts, just a little bit longer. It really is a simple R&R.
Like I said before, the pedestals and bolts are differant, so if you're going to replace those get the 5.2/5.9 parts.
This site lists them for $6.50 each. I paid a little less about 6 months ago, so I guess prices have gone up. Still, $104 is a pretty good deal.
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Reapist
Gen I
8/16/2007
08:53:30
| RE: LOOKING FOR ROCKERS
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If the rockers are longer....won't the lift ratio be lower? I suppose that depends on which side of the fulcrum the arm is longer, but, all things being equal a 1.7 rocker should be shorter than a 1.6, or am I wrong? I don't think so, but......
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DSW
Dodge Dakota
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8/16/2007
11:43:34
| RE: LOOKING FOR ROCKERS
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Try oemdodgeparts.com for the rockers. While ordering a few parts I looked up the Viper rockers, they were $4.49 each.
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.boB
Dodge Dakota
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8/16/2007
14:10:50
| RE: LOOKING FOR ROCKERS
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They are longer on the push rod side.
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Reapist
Gen I
8/16/2007
14:16:09
| RE: LOOKING FOR ROCKERS
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I'm not quit at genius level, but if they're longer on the pushrod side I don't think they'll open the valves as far or as fast.
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clint282cc
Dodge Dakota
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8/20/2007
14:57:30
| RE: LOOKING FOR ROCKERS
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i have 1.7 rockers with about 5k miles on them. email me if you want them 70 bucks shipped
clint282cc@yahoo.com
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N56629
Dodge Dakota
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8/20/2007
18:45:46
| RE: LOOKING FOR ROCKERS
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They are longer on the valve side.
Then again they could be shorter on the push rod side. :>)
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rezonator
Dodge Dakota
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8/20/2007
21:04:13
| RE: LOOKING FOR ROCKERS
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clint282 i sent you an email
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clint282cc
Dodge Dakota
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8/20/2007
23:41:00
| RE: LOOKING FOR ROCKERS
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longer on valve side. its 1.7inches on the valve side compared to the 1 inch on the pushrod side. hence 1.7 to 1 rockers.
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jjj
Dodge Dakota
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8/21/2007
18:40:20
| RE: LOOKING FOR ROCKERS
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Sorry clint282cc, that isn't how it works :)
it is a 1.7 ratio rocker, meaning you take the cam lobe lift and muliply it by 1.7 to get the valve lift.
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clint282cc
Dodge Dakota
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8/21/2007
18:59:14
| RE: LOOKING FOR ROCKERS
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dude. i measured both sides from the bolt hole on the rocker with a micrometer. stock ones were 1.6 and the other ones were 1.7.
if i was do do it the way you say that would mean my cam which has .455 of lift would have an actual lift of .728 of lift with my stock 1.6 rockers? i dont think so.
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jjj
Dodge Dakota
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8/21/2007
23:45:48
| RE: LOOKING FOR ROCKERS
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Trust me I know what I'm talking about.
http://www.moparmusclemagazine.com/howto/38620_rocker_arm_upgrade_install/
Maybe you will believe them.
Measure you actual cam lobe lift, I very much doubt it is .455". It is .455 at the valve if it is a stock cam.
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.boB
Dodge Dakota
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8/22/2007
12:07:52
| RE: LOOKING FOR ROCKERS
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Actually, you're both right.
The rocker arm is simply a lever. If one side is 1.7 x the other side, the ratio is 1.7.
Movement of one measure up on the short side, will = movement of 1.7 measures down on the long side.
Most camshafts are listed with valve lift, not cam lobe lift, as a primary measurement. And they are usually listed using the stock ratio rocker arm. For example, stock Ford is 1.6. So when you look in the Comp Cams catalog, you'll see valve lift numbers based on the stock 1.6 ratio rocker arms.
Here's how the numbers work for a stock 2001 5.9l:
Cam lift: I- 0.256", E- 0.261"
Valve lift, stock 1.6 rocker: I- 0.410", E- 0.417"
Valve lift, 1.7 rocker: I- 0.435", E- 0.444"
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Kent Imhoff
Dodge Dakota
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8/22/2007
17:56:02
| RE: LOOKING FOR ROCKERS
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.boB,
Nice explanation. Is the lift the distance the valve is lifted off the seat at full open? What about duration between 1.6 and 1.7?
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jjj
Dodge Dakota
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8/22/2007
22:19:56
| RE: LOOKING FOR ROCKERS
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yes lift is the max lift at the exact theoretical rocker ratio. Most stock rockers aren't real precise and exact.
Duration also slightly increases with a higher ratio rocker.
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jjj
Dodge Dakota
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8/23/2007
16:41:28
| RE: LOOKING FOR ROCKERS
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Actually Bob he is right as far as the measurement in "this" case, however I am fairly sure not all rockers are 1" on the one side.
It is a ratio, nothing more - nothing less. Just a coincedence that in this case the distance from valve end to center = 1", which is what threw him off in the first place.
Not nitpicking, just want to inform him correctly on what a 1.7 or 1.6 or any ratio rocker is.
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clint282cc
Dodge Dakota
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8/23/2007
17:27:53
| RE: LOOKING FOR ROCKERS
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riiight. i knew what they were. and now i understand how the total lift is achieved
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