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Valve springs in a HEMI

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SpinningWrenches

New member
Running a BP-2 cam, DYNO calls for 26lb valve springs. I know NR sells some 18 for the Hemi but I can't find any 26lb. Soooooo

Anybody know what the seat pressure would be on a G200 18lb spring installed in a Hemi with an installed height of somewhere around .730? I don't think there would be any coil bind to speak of.

Anyone have a better idea?
 
I just have the regular 26lb (white stripe) in my Hemi heads. Use the std aluminum retainers and locks. I cant remember installed height, but with a MOD2, its good to go.
 
Pretty sure the 18# Honda's will not work, and the regular 26# clone springs will. I just sent sneaks a PM about this yesterday.
 
youngengines said:
I just have the regular 26lb (white stripe) in my Hemi heads. Use the std aluminum retainers and locks. I cant remember installed height, but with a MOD2, its good to go.
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With 26lb springs are you seeing any excessive lobe wear? Seat pressure would be around 40lbs at hemi head installed height.

Would my stock pushrods even survive?
 
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SpinningWrenches said:
With 26lb springs are you seeing any excessive lobe wear? Seat pressure would be around 40lbs at hemi head installed height.

Would my stock pushrods even survive?
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I haven't had any wear problems. I have stock pushrods in two of them, I had one break, but I have turned them 8000+ a lot.
 
A Lot of Clone Springs Are Subject to Coil Bind, Due to the Shorter Installed Height on the Hemi Head,Also Valve Length is a Factor, as Well as Pressure Exerted on the Cam Due to the Shorter Installed Height;
JMO of Course
tootall28 said:
Have yall tryed the springs yet? Whats the out come
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Digging up an old post, the Hemi standard installed heights are around .785" exhaust and .835" inlet. With the NR 18lb springs which are actually a HD Animal spring you end with about 25lb seat on the exhaust and 13lb on the inlet! Use the 22 or 26lb springs. With 22lb in a Hemi you get about 25lb exhaust and 22lb inlet.
 
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