Adjustable Rocker Arm Prototype #1 - DodgeIntrepid.Net Forums - Dodge Intrepid, Concorde, 300m and Eagle Vision chat
Reply
 
LinkBack Thread Tools Rate Thread Display Modes
post #1 of 28 (permalink) Old 12-27-2012, 08:06 PM Thread Starter
Intrepid Pro
 
dodgebob68's Avatar
 
Join Date: Feb 2010
Location: Panama City, FL
Posts: 1,235
Feedback: 0 / 0%
                     
Cool Adjustable Rocker Arm Prototype #1

Having an extra set of formerly sludged up and oil caked rockers and shafts for a 3.5, I decided to engineer up an adjustable rocker arm. I cut the top off the hydraulic arm, pressed out the hydraulic guts, then honed the opening to .495", and pressed in a .500" by .75" bushing. That was threaded with a 3/8-24 pitch tap. I used a Crane adjustable rocker screw and locknut and redrilled the oil hole so oil will flow out the top of the rocker just behind the locknut and oil the top end like the hydraulic rocker would. Now, you may be asking why I would take a perfectly good rocker arm and do this, and to what end. My devious mechanical mind knows that a solid valvetrain can handle more lift, operate faster, and go to a higher rpm without valve float. This is a major advantage when using custom ground cams, since the base circle is reduced to increase the duration, but at the cost of lift. The adjustable rocker arm shaft can make up some of that lift, and eliminate the need for lash caps. Those little rascals are over $100 bucks for a set for our engines. You also have no lifter/lash oil up when the engine is cold, just an occasional valve adjustment. Stay tuned, as I make 23 more of these fascinating little rockers and try an install and adjust on the mighty stroker.


"It's finally built the way Dodge should have built it."

dodgebob68 is offline  
Sponsored Links
Advertisement
 
post #2 of 28 (permalink) Old 12-27-2012, 08:15 PM
Intrepid Pro
 
DjGreggieP's Avatar
 
Join Date: Apr 2008
Location: Saskatchewan Canada
Posts: 4,073
Feedback: 1 / 100%
                     
If this works out, I may have to source a set and get a custom set from you!!
DjGreggieP is offline  
post #3 of 28 (permalink) Old 12-27-2012, 08:19 PM
Intrepid Pro
 
Join Date: Feb 2002
Location: Virginia, U.S.
Posts: 16,180
Feedback: 4 / 83%
                     
That's radical, dude!
peva is offline  
Sponsored Links
Advertisement
 
post #4 of 28 (permalink) Old 12-27-2012, 08:23 PM Thread Starter
Intrepid Pro
 
dodgebob68's Avatar
 
Join Date: Feb 2010
Location: Panama City, FL
Posts: 1,235
Feedback: 0 / 0%
                     
Quote:
Originally Posted by peva View Post
That's radical, dude!
You know it! See what happens when you have a little too much time on your hands?
dodgebob68 is offline  
post #5 of 28 (permalink) Old 12-27-2012, 08:23 PM Thread Starter
Intrepid Pro
 
dodgebob68's Avatar
 
Join Date: Feb 2010
Location: Panama City, FL
Posts: 1,235
Feedback: 0 / 0%
                     
Quote:
Originally Posted by DjGreggieP View Post
If this works out, I may have to source a set and get a custom set from you!!
I'm thinking that I may custom make some. Have to see what it costs me to make a set and figure out some labor costs.
dodgebob68 is offline  
post #6 of 28 (permalink) Old 12-27-2012, 08:41 PM
Farticcus of Plenticcus
 
shadowvox6's Avatar
 
Join Date: Sep 2003
Location: 39.199138,-84.669778
Posts: 17,030
Feedback: 18 / 100%
                     
Noice....
Staying tuned



shadowvox6 is offline  
post #7 of 28 (permalink) Old 12-27-2012, 09:02 PM
Intrepid Pro

 
dmondeac's Avatar
 
Join Date: Jun 2004
Location: Midlothian, VA
Posts: 2,576
Feedback: 15 / 100%
                     
Nice work Bob!
dmondeac is offline  
post #8 of 28 (permalink) Old 12-27-2012, 09:04 PM
Intrepid Pro
 
Adpros's Avatar
 
Join Date: May 2012
Location: East Saint Louis Co
Posts: 1,757
Feedback: 5 / 100%
                     
I'm liking it. Looks like a cool winter project!
Adpros is offline  
post #9 of 28 (permalink) Old 12-27-2012, 10:24 PM Thread Starter
Intrepid Pro
 
dodgebob68's Avatar
 
Join Date: Feb 2010
Location: Panama City, FL
Posts: 1,235
Feedback: 0 / 0%
                     
Thank you Gentlemen, I appreciate it. I'm pretty satisfied with how the first one turned out, I have the rest of the rockers, stands and shafts soaking in acetone to get rid of the sludge (if you followed the stroker buildup you saw them on the first engine I brought home). Looking into adding a valve spring damper to the Nitro springs, just for the high rpm dampening effect. I'm feeling that this motor will top 7 grand before the speed limiter kicks in. Unless there is a rev limiter too, I know at idle in neutral it shuts down at about 3500 rpm. I can wind it out easily to about 6500 before I top 35 or 40 mph, so the potential is there for more rpm's before the shift point. Thats holding it in gear and then slapping the B&M into second/third. If I let it upshift on its own, it goes one to two at about 5500 and dogs out for a second like an old 440 with a thermoquad. Sick. Hoping the juice will carry it over that slump.

"It's finally built the way Dodge should have built it."

dodgebob68 is offline  
post #10 of 28 (permalink) Old 12-27-2012, 10:29 PM
Intrepid Pro
 
Squilliam's Avatar
 
Join Date: Nov 2008
Location: Greater Pittsburgh, PA
Posts: 15,047
Feedback: 2 / 100%
                     
If you dont make it to Carlise this year...I will be eternally disappointed.
Squilliam is offline  
post #11 of 28 (permalink) Old 12-27-2012, 10:59 PM
Intrepid Pro
 
DjGreggieP's Avatar
 
Join Date: Apr 2008
Location: Saskatchewan Canada
Posts: 4,073
Feedback: 1 / 100%
                     
I am really thinking I need to source another 3.5 HO to stroke and beef up. I wonder if I could still get asymmetrical pistons tho...
DjGreggieP is offline  
post #12 of 28 (permalink) Old 12-28-2012, 01:34 AM
Intrepid Modder
 
Join Date: Oct 2012
Location: USA
Posts: 738
Feedback: 0 / 0%
                     
I have a spare set laying around myself. Maybe your modifications will cure that FREAKING ticking at start up. If I prime the engine with the gas pedal to the floor and crank it, start it up, turn it off and crank again for another few seconds she doesn't tap at the top.
SRT6INTREPID is offline  
post #13 of 28 (permalink) Old 12-28-2012, 03:40 AM
Intrepid Newbie
 
Join Date: Dec 2012
Location: poland
Posts: 9
Feedback: 0 / 0%
 
good idea
crawfish is offline  
post #14 of 28 (permalink) Old 12-28-2012, 06:17 AM Thread Starter
Intrepid Pro
 
dodgebob68's Avatar
 
Join Date: Feb 2010
Location: Panama City, FL
Posts: 1,235
Feedback: 0 / 0%
                     
Quote:
Originally Posted by DjGreggieP View Post
I am really thinking I need to source another 3.5 HO to stroke and beef up. I wonder if I could still get asymmetrical pistons tho...
Asymmetrical pistons???.....
dodgebob68 is offline  
post #15 of 28 (permalink) Old 12-28-2012, 01:46 PM
Intrepid Pro
 
DjGreggieP's Avatar
 
Join Date: Apr 2008
Location: Saskatchewan Canada
Posts: 4,073
Feedback: 1 / 100%
                     
Quote:
Originally Posted by dodgebob68 View Post
Asymmetrical pistons???.....
http://www.jepistons.com/Articles/10...d-Pistons.aspx

Basically, it reduces the weight and friction of the pistons by reducing the size of the non thrust side piston skirt.

The things I have learned from thinking outside the box and analyzing all forms of 'import tuning' lol
DjGreggieP is offline  
Sponsored Links
Advertisement
 
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the DodgeIntrepid.Net Forums - Dodge Intrepid, Concorde, 300m and Eagle Vision chat forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

Member names may only be composed of alpha-numeric characters. (A-Z and 0-9)

!!ATTENTION ADVERTISERS!! If you intend on advertising anything on this forum, whatsoever, you are required to first contact us here . Additionaly, we do NOT allow BUSINESS NAMES unless you are an Authorized Vendor. If you own a business, and want to do sales on this site via posting or private message, you will need to follow the rules. Shops, Stores, Distributors, Group Buys without being authorized will see your account terminated.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in










Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes Rate This Thread
Linear Mode Linear Mode
Rate This Thread:



Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome