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Isky adjustable non roller rockers? #1592208 03/12/14 10:48 PM 03/12/14 10:48 PM
Joined: Jan 2009 Posts: 294 Minnesota RockChip OP enthusiast
RockChip OP enthusiast Joined: Jan 2009 Posts: 294 Minnesota	Good? Bad? Any gains from switching to a roller design? Getting rid of the springs? 530-670 lift

Re: Isky adjustable non roller rockers? [Re: RockChip] #1592209 03/12/14 11:03 PM 03/12/14 11:03 PM
Joined: Oct 2005 Posts: 8,911 Ontario, Canada S Stanton Don't question me!
Stanton Don't question me! S Joined: Oct 2005 Posts: 8,911 Ontario, Canada	I like those Isky's (the nodular iron one's right) but they have limitations. I wouldn't use them with a cam much over .500 lift. Just my opinion.

Re: Isky adjustable non roller rockers? [Re: Stanton] #1592210 03/13/14 12:51 AM 03/13/14 12:51 AM
Joined: Jan 2003 Posts: 4,448 Phoenix, AZ M MoparBilly master
MoparBilly master M Joined: Jan 2003 Posts: 4,448 Phoenix, AZ	Great rockers, unbreakable. Years and years on a .640 lift solid. Ditch the springs and build spacers. "Livin' in a powder keg and givin' off sparks" 4 Street cars, 5 Race engines

Re: Isky adjustable non roller rockers? [Re: MoparBilly] #1592211 03/13/14 01:05 AM 03/13/14 01:05 AM
Joined: Jan 2009 Posts: 294 Minnesota RockChip OP enthusiast
RockChip OP enthusiast Joined: Jan 2009 Posts: 294 Minnesota	Mopar Billy Do you think they would hold up to a old Racer Brown roller from the mid 80s? I think 680 lift, not sure. Engine has a Comp XE290S .540/.558 lift.

Re: Isky adjustable non roller rockers? [Re: RockChip] #1592212 03/13/14 01:52 AM 03/13/14 01:52 AM
Joined: Jan 2003 Posts: 4,448 Phoenix, AZ M MoparBilly master
MoparBilly master M Joined: Jan 2003 Posts: 4,448 Phoenix, AZ	I'm sure it would work, many guys ran them back in the day. I'd prefer to use lash caps, and carefully set up the sweep, as spacers on the pedestals may be required. The only drawback would possibly be excessive side loading on the guides, but as I said, I had over 900 passes with mine on a set of Edelbrock RPMs, now the heads and rockers are on my brother's street truck, also with a 640 solid, and we've had zero valve train problems. 8072266-barnyard2.jpg (140 downloads)

Re: Isky adjustable non roller rockers? [Re: MoparBilly] #1592213 03/13/14 11:25 AM 03/13/14 11:25 AM
Joined: Jan 2009 Posts: 294 Minnesota RockChip OP enthusiast
RockChip OP enthusiast Joined: Jan 2009 Posts: 294 Minnesota	I'm gonna try it and see how it looks, I think 230 on the seat would be enough to keep the valves under control, the lobes are not square like the modern stuff.

Re: Isky adjustable non roller rockers? [Re: RockChip] #1592214 03/13/14 05:34 PM 03/13/14 05:34 PM
Joined: Aug 2003 Posts: 43,303 Bend,OR USA C Cab_Burge I Win
Cab_Burge I Win C Joined: Aug 2003 Posts: 43,303 Bend,OR USA	I know many SS M.W. racers used the OEM Mopar ductile iron rockers for years running roller cams and valve springs, same thing on many SS Hemi racers I will send my ductile iron rockers to Rocker Arm Spec.(530-242-1316) now that Gary has the company back in his control, for bushing, blueprinting and ratio correcting The older Isky with the welded on harden tips on the valve stem end are a lot better looking, stouter looking, than the newer ones that look just like the Cranes, Ersons and other company that sold that brand of ductile iron adjustable rockers for B/RB Mopar motors Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)

Re: Isky adjustable non roller rockers? [Re: Cab_Burge] #1592215 03/14/14 01:13 AM 03/14/14 01:13 AM
Joined: Jan 2009 Posts: 294 Minnesota RockChip OP enthusiast
RockChip OP enthusiast Joined: Jan 2009 Posts: 294 Minnesota	I have the ones with the hardened pads, gonna make some aluminum spacers to get rid of the springs

Re: Isky adjustable non roller rockers? [Re: RockChip] #1592216 03/14/14 03:32 AM 03/14/14 03:32 AM
Joined: Aug 2003 Posts: 43,303 Bend,OR USA C Cab_Burge I Win
Cab_Burge I Win C Joined: Aug 2003 Posts: 43,303 Bend,OR USA	You got the good ones Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)

Re: Isky adjustable non roller rockers? [Re: Cab_Burge] #1592217 03/14/14 02:23 PM 03/14/14 02:23 PM
Joined: Jan 2003 Posts: 10,766 Central Valley, CA. Quicksilver440 I Live Here
Quicksilver440 I Live Here Joined: Jan 2003 Posts: 10,766 Central Valley, CA.	I'm interested in having this done to my set too. Any idea how much this costs? Quote: I know many SS M.W. racers used the OEM Mopar ductile iron rockers for years running roller cams and valve springs, same thing on many SS Hemi racers I will send my ductile iron rockers to Rocker Arm Spec.(530-242-1316) now that Gary has the company back in his control, for bushing, blueprinting and ratio correcting The older Isky with the welded on harden tips on the valve stem end are a lot better looking, stouter looking, than the newer ones that look just like the Cranes, Ersons and other company that sold that brand of ductile iron adjustable rockers for B/RB Mopar motors

Re: Isky adjustable non roller rockers? [Re: Quicksilver440] #1592218 03/14/14 02:27 PM 03/14/14 02:27 PM
Joined: Aug 2003 Posts: 43,303 Bend,OR USA C Cab_Burge I Win
Cab_Burge I Win C Joined: Aug 2003 Posts: 43,303 Bend,OR USA	Call Gary and ask him, I have them do all the things they do, change the ratio, bush and rebuild the rockers and do the tips Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)

Re: Isky adjustable non roller rockers? [Re: Cab_Burge] #1592219 03/14/14 07:16 PM 03/14/14 07:16 PM
Joined: Jan 2009 Posts: 294 Minnesota RockChip OP enthusiast
RockChip OP enthusiast Joined: Jan 2009 Posts: 294 Minnesota	I herd the ratio of them is all over the place.... On assembly I might check each valve and see what the variables are.

Re: Isky adjustable non roller rockers? [Re: RockChip] #1592220 03/15/14 12:49 AM 03/15/14 12:49 AM
Joined: Aug 2003 Posts: 43,303 Bend,OR USA C Cab_Burge I Win
Cab_Burge I Win C Joined: Aug 2003 Posts: 43,303 Bend,OR USA	Quote: I herd the ratio of them is all over the place.... On assembly I might check each valve and see what the variables are. Do that I've seen a bunch of differences on the stock 426 Street Hemi rockers, a big bunch I do now check all the rockers for ratio at the retainers with light checking springs I've seen .015 lift differences on the good rockers like T&D single shafts B/RB systems Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)

Re: Isky adjustable non roller rockers? [Re: Quicksilver440] #1592221 03/15/14 01:40 PM 03/15/14 01:40 PM
Joined: Dec 2004 Posts: 10,558 Rittman Ohio fourgearsavoy I Live Here
fourgearsavoy I Live Here Joined: Dec 2004 Posts: 10,558 Rittman Ohio	Quote: I'm interested in having this done to my set too. Any idea how much this costs? Quote: I know many SS M.W. racers used the OEM Mopar ductile iron rockers for years running roller cams and valve springs, same thing on many SS Hemi racers I will send my ductile iron rockers to Rocker Arm Spec.(530-242-1316) now that Gary has the company back in his control, for bushing, blueprinting and ratio correcting The older Isky with the welded on harden tips on the valve stem end are a lot better looking, stouter looking, than the newer ones that look just like the Cranes, Ersons and other company that sold that brand of ductile iron adjustable rockers for B/RB Mopar motors I had mine done about 4 years ago when they were still RAS and 4he cost with new shafts was just a bit over $500 and I really feel like I got what I paid for Gus 8074829-004-001.JPG (149 downloads) 64 Plymouth Savoy 493 Indy EZ's by Nick at Compu-Flow 5-Speed Richmond faceplate Liberty box Dana 60

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