Re: What Valves for RHS LA X Heads?
[Re: Baxter61]
#2278492
03/29/17 08:01 PM
03/29/17 08:01 PM
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Joined: Mar 2008
Posts: 860
lancaster,california
johnnycuda
super stock
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super stock
Joined: Mar 2008
Posts: 860
lancaster,california
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I bought my heads from Brian at IMM in Indio, Ca., they're 2.02"/1.60", beehive, not sure of installed height, metric valve stem I believe.
1970 'Cuda,Lime Light,499 Indy S/R's 10.70's @125,street driven ALOT!
1966 Barracuda 360,now a 5spd,Hemi Orange,Hot Rod Air,
New daily driver-2003 Ram 2500 Cummins 5.9
'69 Valiant 2-dr, sleeper!
New project---1938 Dodge truck, plan is a 360 with a A500, AC, Calvert rear susp., rack and pinion front with coils.
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Re: What Valves for RHS LA X Heads?
[Re: Baxter61]
#2279147
03/30/17 10:06 PM
03/30/17 10:06 PM
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Joined: Aug 2007
Posts: 498
El Dorado Ca
65signet
mopar
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mopar
Joined: Aug 2007
Posts: 498
El Dorado Ca
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They are a 8mm stem or 5/16 stem, ferrea makes the valves, and comp makes a 1.81 installed height beehive spring, for a standard valve spring pocket, i run them on stock 318 heads.
1965 Plymouth Barracuda 273 M/SA
1970 Plymouth Duster 360/904 10.60s with J heads
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Re: What Valves for RHS LA X Heads?
[Re: 65signet]
#2279420
03/31/17 10:38 AM
03/31/17 10:38 AM
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Joined: Nov 2004
Posts: 3,544
Syracuse,NY
CompWedgeEngines
master
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master
Joined: Nov 2004
Posts: 3,544
Syracuse,NY
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Great little heads, but set up is a bit of a pain. Easiest thing to do is ream them to 11/32, and use common SBC valves, much more options. If you want to stick with 5/16, less options, or at least they are more expensive options.
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Re: What Valves for RHS LA X Heads?
[Re: 65signet]
#2279510
03/31/17 12:48 PM
03/31/17 12:48 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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They are a 8mm stem or 5/16 stem, ferrea makes the valves, and comp makes a 1.81 installed height beehive spring, for a standard valve spring pocket, i run them on stock 318 heads. Yes, what 65signet said. I have used the same valve and a Comp 26995 spring at 1.81" IH on both an Indy RHS head and an EQ head.
Last edited by cudadoug; 03/31/17 12:49 PM.
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Re: What Valves for RHS LA X Heads?
[Re: Baxter61]
#2279672
03/31/17 04:35 PM
03/31/17 04:35 PM
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Joined: Jan 2005
Posts: 12,419
Kalispell Mt.
HotRodDave
I Live Here
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I Live Here
Joined: Jan 2005
Posts: 12,419
Kalispell Mt.
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How much lift are you after? I am running stock length stainless valves 2.02 1.65 from hughes with their springs and retainers at .575 lift (theoretical) and it still clears the stock guide to boot.
As for diameter I would not go any bigger because the valves are so close but maybe you could go with a 2.05 1.60 or something but you need to open the bowl and chamber quite a bit as well as your bore should probably be bigger than my 4.04 to make any use of that. I would just run the 2.02 and open the chamber to the edge of your bore.
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Re: What Valves for RHS LA X Heads?
[Re: HotRodDave]
#2279678
03/31/17 04:42 PM
03/31/17 04:42 PM
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Joined: Nov 2004
Posts: 2,495
Oregon City, OR
Baxter61
OP
top fuel
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OP
top fuel
Joined: Nov 2004
Posts: 2,495
Oregon City, OR
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How much lift are you after? I am running stock length stainless valves 2.02 1.65 from hughes with their springs and retainers at .575 lift (theoretical) and it still clears the stock guide to boot.
As for diameter I would not go any bigger because the valves are so close but maybe you could go with a 2.05 1.60 or something but you need to open the bowl and chamber quite a bit as well as your bore should probably be bigger than my 4.04 to make any use of that. I would just run the 2.02 and open the chamber to the edge of your bore. Thats pretty much the plan right now is to run them on a 4.04 bore. As for lift Ive mostly been looking at mid-.550-.590 lift cams. I just didnt know what the stock length for these heads was, if it matched a regular LA head or not.
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