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Re: RHS INDY 360X heads!! [Re: S/ST 3040] #233526 07/20/09 02:19 PM 07/20/09 02:19 PM
Joined: Jan 2003 Posts: 16,123 Grand Haven, MI patrick I Live Here
patrick I Live Here Joined: Jan 2003 Posts: 16,123 Grand Haven, MI	Quote: This is a different LA head but, with the same lay-out. Anybody with a fraction of mechanical apptitude can visualize how putting longer and longer valves will quickly, "Not Work". Additional machining operations and "band-aid" fixes only add to the subsiquent cost of a buget head. Hughes has corrected rocker arm geometry on the OEM LA heads for years so, they have a clue. We are all guilty of our occasional, poor choice of words and my hand is up as I am FREQUENTLY misunderstood. I hope all involved get this rectified in short order. -Vic Bloomer longer valves will work, you just have to shim the rockers up accordingly..... FWIW my virgin chrysler '671 magnum heads,when I measured IH with the stock retainers, I had ~1.62-1.64". using stock locks and 2.2L retainers (to use 1.4" diameter springs), I had 1.60", and about the same with GM 3100 retainers and magnum locks. when I had the valve job done, I had the seats sunk .030" for a little more installed height. that still limited my heads to about .520-.530" lift with the hughes 1110 springs I chose, but the cam I chose had .316" lobe lift, so I was fine. you can still make a lot of steam in a SBM with .530" lift... another option to look at would be something like these crane springs: http://www.summitracing.com/parts/CRN-99840-16/ shim them up .060" so your looking at 1.565" IH, you're looking at .63" travel before coil bind, so a reasonable lift limit of .570-.58" lift. at that IH you're only looking at 104lbs on the seat, though..... also, before machining, my heads had about .540" of travel before the valve locks hit the seals. in all instances (stock retainers, 2.2L retainers, GM 3100 retainers), the LOCKS would contact the seals about .005" before the retainers. Last edited by patrick; 07/20/09 02:37 PM. 1976 Spinnaker White Plymouth Duster, /6 A833OD 1986 Silver/Twilight Blue Chrysler 5th Ave HotRod SOLD!* 2011 Toxic Orange Dodge Charger R/T 2017 Grand Cherokee Overland 2014 Jeep Cherokee Latitude (holy crap, my daughter is driving)

Re: RHS INDY 360X heads!! [Re: patrick] #233527 07/20/09 02:28 PM 07/20/09 02:28 PM
Joined: Jul 2006 Posts: 4,595 On the south side of Nowhere S S/ST 3040 master
S/ST 3040 master S Joined: Jul 2006 Posts: 4,595 On the south side of Nowhere	It can't and won't work correctly. Look at the attachment. The more you move the rocker shaft and stem height UP.........moves the roller further to the wrong side of the valve. That's the very reason, the W-2 heads have offset shafts and different pivot lengths.

Re: RHS INDY 360X heads!! [Re: danbap] #233528 07/20/09 04:30 PM 07/20/09 04:30 PM
Joined: Aug 2007 Posts: 498 El Dorado Ca 6 65signet mopar
65signet mopar 6 Joined: Aug 2007 Posts: 498 El Dorado Ca	Can you run a .550 lift cam with these heads OOTB? 1965 Plymouth Barracuda 273 M/SA 1970 Plymouth Duster 360/904 10.60s with J heads

Re: RHS INDY 360X heads!! [Re: 65signet] #233529 07/20/09 05:36 PM 07/20/09 05:36 PM
Joined: Feb 2003 Posts: 4,953 Houston, Texas TheOtherDodge master
TheOtherDodge master Joined: Feb 2003 Posts: 4,953 Houston, Texas	The complete assembled head with 2.02/1.625 valve is set up to take a .525 lift cam. I was wrong about .550 lift (I was guessing based on what I remembered). However, Indy said if you want to run .550 lift, they can set it up that way. I am running the stock cam (.430ish) so I wasn't concerned.

Re: RHS INDY 360X heads!! [Re: patrick] #233530 07/21/09 09:16 AM 07/21/09 09:16 AM
Joined: May 2004 Posts: 270 Washington, IL H Hughes enthusiast
Hughes enthusiast H Joined: May 2004 Posts: 270 Washington, IL	If the lifter and valves and the rocker pedastels were parallel to each other you could just raise the rockers and run longer valves. They are not parallel and the higher you raise the rockers, the worse the geometry gets. As far as compared to the Iron Ram heads...... Yes, the RHS/INDY head flows better. Once we get the spring issue fixed, like I said, it will be the head of choice. Kevin 5366024-TheHughesLogofourth.jpg (76 downloads) www.hughesengines.com

Re: RHS INDY 360X heads!! [Re: S/ST 3040] #233531 07/21/09 11:24 AM 07/21/09 11:24 AM
Joined: Jan 2003 Posts: 16,123 Grand Haven, MI patrick I Live Here
patrick I Live Here Joined: Jan 2003 Posts: 16,123 Grand Haven, MI	Quote: It doesn't and won't work correctly. Look at the attachment. The more you move the rocker shaft and stem height UP.........moves the roller further to the wrong side of the valve. That's the very reason, the W-2 heads have offset shafts and different pivot lengths. yeah, I forgot that the valves are at an angle relative to the shafts... 1976 Spinnaker White Plymouth Duster, /6 A833OD 1986 Silver/Twilight Blue Chrysler 5th Ave HotRod SOLD!* 2011 Toxic Orange Dodge Charger R/T 2017 Grand Cherokee Overland 2014 Jeep Cherokee Latitude (holy crap, my daughter is driving)

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