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#1
03-22-2023, 07:06 AM
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Speedmaster cylinder heads no spring locators
My Speedmaster heads only come with shims between spring and cylinder head. No spring locators.
Is this normal on assembled heads? Edelbrock rpm aswell? Average install height on the springs was 1.780. These springs are supposed to have 130 lbs pressure @ 1.800 install height. Would it be a good idea to run it tighter, like they came from Speedmaster, as the springs will soften after some use? Is it okey to run without spring locators? |
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#2
03-22-2023, 08:33 AM
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Locators are only needed on aluminum heads if the ID of the inner spring is too far away from the OD of the bottom step that is under the valve guide.
__________________
I do stuff for reasons. |
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#3
03-22-2023, 01:07 PM
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Define too far away?
__________________
Skip Fix 1978 Trans Am original owner 10.99 @ 124 pump gas 455 E heads, NO Bird ever! 1981 Black SE Trans Am stockish 6X 400ci, turbo 301 on a stand 1965 GTO 4 barrel 3 speed project 2004 GTO Pulse Red stock motor computer tune 13.43@103.4 1964 Impala SS 409/470ci 600 HP stroker project 1979 Camaro IAII Edelbrock head 500" 695 HP 10.33@132 3595lbs |
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#4
03-22-2023, 06:39 PM
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Well the stock Pontiac valve guide OD is .685”, and the stock inner valve spring ID is .775” .
That makes for .090” overall or a radius of .045”. That amount of clearance is what Sounds good to me to shoot for in terms of a maximum without the usage of a spring cup, but then again are spring cups made for Beehive / conical springs?
__________________
I do stuff for reasons. |
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#5
03-22-2023, 06:46 PM
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How stupid of me, yes they locate by the OD for Beehive /. Conical springs.
__________________
I do stuff for reasons. |
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#6
03-22-2023, 08:34 PM
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Mine came the same but at 1.825 install hieght. I bought spring locators from comp and set them at 1.8 like they are suppose to be. so far so good.
__________________
1979 Firebird Trans Am 301/4spd (Now 428) 1977 Firebird Formula 400/Auto 2007 Grand Prix GXP 5.3L |
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#7
03-23-2023, 07:52 AM
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Manley 42573 seem to be a good fit for these heads and springs.
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