Rocker Arms for Big Block
#2135885
08/18/16 02:52 PM
08/18/16 02:52 PM
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Joined: Sep 2005
Posts: 401 Berlin, Germany
Flo
OP
mopar
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OP
mopar
Joined: Sep 2005
Posts: 401
Berlin, Germany
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hi, in the process of planning my new big block. -Will have std. style heads (440 source). -hydraulic roller from Mike Jones 242/250 @.050" .375"/.360" Lobe Lift -rev limit at 6500rpm -street car What rockers to sue? Anyone with REAL world experience? I really like the Comp steel rocker: https://www.atechmotorsports.com/parts/cca-1621-16but they only come in 1.5 ratio. Has someone used the Hughes Engines 1.6 or 1.7 ratio rockers? Any recomendations? Greets flo
Last edited by Flo; 08/18/16 03:12 PM.
1967 Fury III 4door HT
tiny 318, late model roller block, bored and stroked to 344
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Re: Rocker Arms for Big Block
[Re: Flo]
#2136015
08/18/16 05:51 PM
08/18/16 05:51 PM
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Joined: May 2005
Posts: 1,030 ohio
67mprfan
super stock
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super stock
Joined: May 2005
Posts: 1,030
ohio
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Hughes will work for your street motor but if you are getting the cryo treated ones I would just go ahead and buy the Harland sharps and never have to worry about rocker arms again....
Not knocking Hughes but buy the best and be done with it
71 demon stock stroke 440/indy ez-1 running 10.10 @ 132.14 mph in the 1/4 and 6.36 @ 107.46 mph in the 1/8 not in the same weekend but It did it then I sold it. 67 Belvedere that worked it's way in the 10's
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Re: Rocker Arms for Big Block
[Re: Flo]
#2136076
08/18/16 06:56 PM
08/18/16 06:56 PM
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Joined: May 2015
Posts: 1,134 Lost in Time
Iowan
super stock
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super stock
Joined: May 2015
Posts: 1,134
Lost in Time
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Harland Sharps, 1 and done.
Have a great day Iowan
"obsolete is neat"
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Re: Rocker Arms for Big Block
[Re: Flo]
#2136168
08/18/16 09:14 PM
08/18/16 09:14 PM
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Joined: Jul 2006
Posts: 4,319 Puyallup, WA
StealthWedge67
master
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master
Joined: Jul 2006
Posts: 4,319
Puyallup, WA
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Not sure why you would spec such a mild cam, then look for 1.6 rockers. Why not use a cam that does what you want at 1.5? A deeper ratio puts more stress on the rocker gear and lifters. Not as much of an issue with a solid cam, but when coupled with a hydraulic cam is a recipe for problems in my opinion. I would advise a cam that gets you where you want to be with a 1.5 arm. As far as advice on rocker design: for a mild build, I'd stick with a bushed steel design. Stay away from needle bearings and aluminum.
Last edited by StealthWedge67; 08/18/16 09:16 PM.
LemonWedge - Street heavy / Strip ready - 11.07 @ 120
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Re: Rocker Arms for Big Block
[Re: ahy]
#2136170
08/18/16 09:16 PM
08/18/16 09:16 PM
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Joined: Aug 2003
Posts: 3,245 Between a rock & a hard place
cudadoug
master
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master
Joined: Aug 2003
Posts: 3,245
Between a rock & a hard place
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I was wondering about this posted on the 440source customer rides page. That's a really cheap rocker, but Wade is no dummy. Hmmmmm 9.90's@133 MPH! over 300 runs Wade Metzinger Catoosa, OK 918-809-0987 71 Cuda 440 Source 440>>500 Stroker Kit 440 Source 200-1045 Aluminum Roller Rockers with .660 lift cam.
Last edited by cudadoug; 08/18/16 09:20 PM.
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Re: Rocker Arms for Big Block
[Re: Flo]
#2136181
08/18/16 09:43 PM
08/18/16 09:43 PM
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Joined: Oct 2011
Posts: 559 Idaho
LaRoy Engines
mopar
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mopar
Joined: Oct 2011
Posts: 559
Idaho
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The Comp 1621 rockers work well. The least expensive aluminum rockers I would use are the Mancini Racing made by Harland sharp. Mancini rocker arms With Stealth heads and 1.6 rockers or 3/8 pushrods you have to grind for pushrod clearance. Even with 1.5 rockers and 5/16 pushrods you sometimes have to grind for pushrod clearance.
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Re: Rocker Arms for Big Block
[Re: Flo]
#2136195
08/18/16 10:09 PM
08/18/16 10:09 PM
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Joined: Mar 2009
Posts: 2,464 Sydney,Australia
tex013
top fuel
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top fuel
Joined: Mar 2009
Posts: 2,464
Sydney,Australia
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I have Crane golds on my source heads , 1.5 measure at 1.52:1 I am running these on a solid ft cam. Had them on since 2008 . 6-8000mls a year plus monthly bracket racing .Will reuse them on the new motor Have to grind source heads with 1.5 and 3/8" and 5/16" pushrods
Tex
Last edited by tex013; 08/18/16 10:10 PM.
New best ET 10.259@129.65 . New best MPH 130.32 Finally fitted a solid cam, stepped it up a bit more 3690lbs through the mufflers New World block 3780lbs 10.278@130.80 . Wowser 10.253@130.24 footbraking from 1500rpm Power by Tex's Automotive
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Re: Rocker Arms for Big Block
[Re: Flo]
#2136437
08/19/16 06:37 AM
08/19/16 06:37 AM
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Joined: Sep 2005
Posts: 401 Berlin, Germany
Flo
OP
mopar
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OP
mopar
Joined: Sep 2005
Posts: 401
Berlin, Germany
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Well, I am using the CNCed 440source head because they look stock from the outside...
Grinding would not amtter as engine is not assembled yet.
Will stick with the Comp, just kind of sad to loose "free" valve lift.
1967 Fury III 4door HT
tiny 318, late model roller block, bored and stroked to 344
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Re: Rocker Arms for Big Block
[Re: Flo]
#2136450
08/19/16 08:48 AM
08/19/16 08:48 AM
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Joined: Jan 2005
Posts: 4,243 Charlotte, North Carolina
sgcuda
master
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master
Joined: Jan 2005
Posts: 4,243
Charlotte, North Carolina
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You're only talking a max of .600" lift on a hydraulic roller with a 1.6 rocker. Not super aggressive by any means. I think any decent brand 1.6 rocker will work with your combination. As mentioned, just keep an eye on the pushrod clearance, tip sweep, spring clearance.
[image][/image]
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Re: Rocker Arms for Big Block
[Re: Flo]
#2136458
08/19/16 09:33 AM
08/19/16 09:33 AM
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Joined: Sep 2005
Posts: 401 Berlin, Germany
Flo
OP
mopar
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OP
mopar
Joined: Sep 2005
Posts: 401
Berlin, Germany
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The 1.6 rockers would nominally result in precisely .600" lift on the intake lobe. Exhaust lobe even less.
1967 Fury III 4door HT
tiny 318, late model roller block, bored and stroked to 344
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Re: Rocker Arms for Big Block
[Re: Flo]
#2136483
08/19/16 10:26 AM
08/19/16 10:26 AM
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Joined: Sep 2005
Posts: 401 Berlin, Germany
Flo
OP
mopar
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OP
mopar
Joined: Sep 2005
Posts: 401
Berlin, Germany
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The Harland Sharp are actuall less than the more fancy Hughes rockers. Are Harland Sharp the way to go?
1967 Fury III 4door HT
tiny 318, late model roller block, bored and stroked to 344
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Re: Rocker Arms for Big Block
[Re: Flo]
#2136621
08/19/16 02:08 PM
08/19/16 02:08 PM
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Joined: Jul 2004
Posts: 19,317 State of confusion
Thumperdart
I Live Here
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I Live Here
Joined: Jul 2004
Posts: 19,317
State of confusion
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Been running HS`s for many years and my 1.5`s actually measured 1.54 at the retainer............
72 Dart 470 n/a BB stroker street car `THUMPER`...Check me out on FB Dominic Thumper for videos and lots of carb pics......760-900-3895.....
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Re: Rocker Arms for Big Block
[Re: Flo]
#2137761
08/21/16 11:29 AM
08/21/16 11:29 AM
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Joined: Jul 2013
Posts: 561 USA
B3RE
mopar
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mopar
Joined: Jul 2013
Posts: 561
USA
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Real world experience? Yes. The comp rockers are nice, but I rarely use them for the same reason you mentioned. No higher ratios. I almost always go up in ratio, and prefer a milder camshaft with a higher ratio rocker. With the better heads available these days more lift is needed to take advantage of their capabilities, but getting that lift with a 1.5 rocker means a cam that is too big For most street applications. I would stay away from ball style adjusters on a roller rocker. Their only value is purely sentimental. I guess since the factory had them, then only true Mopar rockers would have them. Wrong! Also, it's your money. Buy what works for your combination. Don't let others spend your money on overpriced, overhyped, or overkill parts. And finally, whatever rocker you choose, make sure they are set up properly. Do a little research on Mopar rocker geometry. Its not about centering the roller on the valve stem. There's a lot more to it than that. Here's a pic of 1.6s on a Big Block Mopar. Sorry about the upside down pics. Sometimes I really hate this phone.
Last edited by B3RE; 08/21/16 11:31 AM. Reason: Pics
Mike Beachel
I didn't write the rules of math nor create the laws of physics, I am just bound by them.
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Re: Rocker Arms for Big Block
[Re: scrapmetal]
#2138366
08/22/16 04:02 AM
08/22/16 04:02 AM
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Joined: Aug 2003
Posts: 43,185 Bend,OR USA
Cab_Burge
I Win
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I Win
Joined: Aug 2003
Posts: 43,185
Bend,OR USA
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Your correct on the old company, Rocker Arm Specialitys, being sold and then going under. One of the original partners died and the other one sold it. He, Gary, took it back and got it going again as RAU and he has now resold it again is what I under stand They are making new stainless steel rockers for the older Gen 1 Chrysler and after market race motors also that use those type heads I do have two sets of the original ductile iron rockers that I had them blueprint, rebuild and bush and change the ratio to 1.6 on one set last year, the other set is still 1.5 ratio. I have his chromemoly steel hold downs and banana groove specail H.D. shafts also, both sets are a mix of different brands, Isky, Mopar, Crane and Ersons I would sell the 1.5 ratio set as I'm switching to the higher end race paired shaft rocker arm sets now due to that I'm using solid roller cams, more spring pressures and revving the motors to higher RPM
Last edited by Cab_Burge; 08/22/16 04:03 AM.
Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
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