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LS2/823 stainless manley valves

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Old Nov 16, 2017 | 02:46 PM
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Default LS2/823 stainless manley valves

Hi everyone. ive got a ls2 with 823 heads on it. the guy I bought the engine from installed new manley valves. Part number 11528-8 and 11527-8. So 2 questions.


1. If these are the valves that are actually in it. what valve springs should I use with (say for now) gmpp "asa" cam?


2. do the 2.190'' intake valves seem big? They seem to fit and seal the seat pretty well.


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Old Nov 16, 2017 | 02:48 PM
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You're only dealing with .525 lift, so nothing special needed there.
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Old Nov 16, 2017 | 03:46 PM
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Originally Posted by mxendres
Hi everyone. ive got a ls2 with 823 heads on it. the guy I bought the engine from installed new manley valves. Part number 11528-8 and 11527-8. So 2 questions.


1. If these are the valves that are actually in it. what valve springs should I use with (say for now) gmpp "asa" cam?


2. do the 2.190'' intake valves seem big? They seem to fit and seal the seat pretty well.


Manley's catalog says those are 3/8" stem BBC valves...

Can you post pics? I'd like to see this abortion of a cylinder head that you have.
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Old Nov 16, 2017 | 05:43 PM
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Originally Posted by KCS
Manley's catalog says those are 3/8" stem BBC valves...

Can you post pics? I'd like to see this abortion of a cylinder head that you have.
My thoughts exactly......
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Old Nov 17, 2017 | 08:00 PM
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Ok so yeah he told me the wrong valves they are the 2.165 Manley Race master ss valves. 117 g intake and 1.590 exhaust 94g. So it’s a sbe ls2. Any ptv issues if I go with a bigger cam and what valve springs should I run? The blue beehive .560 or upgrade to a double spring?
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Old Nov 17, 2017 | 10:23 PM
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I would go with a dual spring since the valves are so heavy.
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Old Nov 18, 2017 | 06:44 AM
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Any recommendations? I’m kinda on a budget and don’t want to spend 500 on springs. What if I did a blue beehive and swapped out the intake valves and put hollow ones in. I’ve just been doing some research.
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Old Nov 18, 2017 | 07:47 AM
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Originally Posted by mxendres
Hi everyone. ive got a ls2 with 823 heads on it. the guy I bought the engine from installed new manley valves. Part number 11528-8 and 11527-8. So 2 questions.


1. If these are the valves that are actually in it. what valve springs should I use with (say for now) gmpp "asa" cam?


2. do the 2.190'' intake valves seem big? They seem to fit and seal the seat pretty well.


Originally Posted by mxendres
Any recommendations? I’m kinda on a budget and don’t want to spend 500 on springs. What if I did a blue beehive and swapped out the intake valves and put hollow ones in. I’ve just been doing some research.
A good dual valve spring kit for your application will run between $199 and $299.
http://www.cammotion.com/valve-train-parts/valve-springs/valve-spring-kits/ls-650-dual-valve-springs-kit-with-steel-retainers/
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Old Nov 18, 2017 | 07:33 PM
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So I took some valves out, can anyone identify them? They say Manley H0414 on the stem of the intake and H0914 on the exhaust.
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