Re: Early big block adjustable rocker arms
[Re: MadMopars]
#2580520
11/20/18 06:04 AM
11/20/18 06:04 AM
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Joined: Aug 2003
Posts: 43,123
Bend,OR USA
Cab_Burge
I Win
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I Win
Joined: Aug 2003
Posts: 43,123
Bend,OR USA
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If your talking about the original ductile iron Mopar adjustable rocker arms found on the 300letter car motors and M.W. motors they do vary from 1.48 up to 1.53 ratio  if your talking about the early Isky ductile iron and other brand ductile iron adjustable they vary also RAS use to bush and correct the ratio, even increase them up to 1.62 or so, but if your going to buy a use set and have them fixed why not buy a good new better set to start with like Comp Cams stainless bushed or some good aluminum roller rockers like T&D or Harland Sharp 
Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
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Re: Early big block adjustable rocker arms
[Re: MadMopars]
#2580684
11/20/18 05:01 PM
11/20/18 05:01 PM
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Joined: Sep 2014
Posts: 4,457
Washington
madscientist
master
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master
Joined: Sep 2014
Posts: 4,457
Washington
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Hey Cab, Yes, I was referring to the early 300/MW rockers.  I just got a set with a 413 and was curious as to how disappointed I would be if I tried to use them with performance in mind. Wasn't sure if they were similar to the Crane or Isky adjustables overall and/or better than the stamp steel rockers for that matter. I'll measure them out at some point in comparison to the Cranes I have laying around, but given work and the holidays I was hopeful that maybe someone, I.E.(You)  had good info on them already to tie me over until I got time to look into them myself. -Trent  Run them. They are durable. Most I've tested are accurate. Contact Mike at B3 racing engines and have him hook you up with a geometry correction kit. That will eliminate 99.99% of any valve train issues you would be having.
Just because you think it won't make it true. Horsepower is KING. To dispute this is stupid. C. Alston
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Re: Early big block adjustable rocker arms
[Re: madscientist]
#2580711
11/20/18 05:52 PM
11/20/18 05:52 PM
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Joined: Feb 2005
Posts: 20,159
PA.
pittsburghracer
"Little"John
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"Little"John
Joined: Feb 2005
Posts: 20,159
PA.
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Hey Cab, Yes, I was referring to the early 300/MW rockers. I just got a set with a 413 and was curious as to how disappointed I would be if I tried to use them with performance in mind. Wasn't sure if they were similar to the Crane or Isky adjustables overall and/or better than the stamp steel rockers for that matter. I'll measure them out at some point in comparison to the Cranes I have laying around, but given work and the holidays I was hopeful that maybe someone, I.E.(You) had good info on them already to tie me over until I got time to look into them myself. -Trent Run them. They are durable. Most I've tested are accurate. Contact Mike at B3 racing engines and have him hook you up with a geometry correction kit. That will eliminate 99.99% of any valve train issues you would be having. Boy Mike has really disappeared hasn't he. I can't remember the last time he posted.
1970 Duster
Edelbrock headed 408
5.984@112.52
422 Indy headed small block
5.982@112.56 mph
9.42@138.27
Livin and lovin life one day at a time
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Re: Early big block adjustable rocker arms
[Re: pittsburghracer]
#2580931
11/21/18 02:55 AM
11/21/18 02:55 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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Hey Cab, Yes, I was referring to the early 300/MW rockers. I just got a set with a 413 and was curious as to how disappointed I would be if I tried to use them with performance in mind. Wasn't sure if they were similar to the Crane or Isky adjustables overall and/or better than the stamp steel rockers for that matter. I'll measure them out at some point in comparison to the Cranes I have laying around, but given work and the holidays I was hopeful that maybe someone, I.E.(You) had good info on them already to tie me over until I got time to look into them myself. -Trent Run them. They are durable. Most I've tested are accurate. Contact Mike at B3 racing engines and have him hook you up with a geometry correction kit. That will eliminate 99.99% of any valve train issues you would be having. Boy Mike has really disappeared hasn't he. I can't remember the last time he posted. Last week John  But, you're right, I haven't been posting much but I do check in fairly often. I just don't have much time to get into any deep discussions of late.
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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Tests, tests and test some more to learn 
Thanks Again! -Trent