C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

Lt1 heads ???'s

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Old Aug 29, 2003 | 04:49 PM
  #1  
Homer J's Avatar
Homer J
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From: Bethlehem PA
Default Lt1 heads ???'s

Still more questions! :lol:
What size valves are in lt1 heads? What are the differences between lt1 and lt4 heads? Anybody know what kind of flow numbers porters are getting out of em? Are the rocker stud or pedisule mounts? Stock rockers are 1.5, correct? Are they full roller rockers? Partial? or not at all?
I appreciate any help, Im not having much luck with the search forum.
:cheers:
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Old Aug 29, 2003 | 04:52 PM
  #2  
Nathan Plemons's Avatar
Nathan Plemons
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Default Re: Lt1 heads ???'s (Homer J)

Still more questions! :lol:
What size valves are in lt1 heads? What are the differences between lt1 and lt4 heads? Anybody know what kind of flow numbers porters are getting out of em? Are the rocker stud or pedisule mounts? Stock rockers are 1.5, correct? Are they full roller rockers? Partial? or not at all?
I appreciate any help, Im not having much luck with the search forum.
:cheers:
Stock LT1 valve size is 1.94 / 1.55 I think the LT4 uses a 2.00 intake. LT4 heads have a slightly taller intake runner design than the LT1. Ported LT1 heads can flow in the 270-285 range, LT4's can do higher, 300 is possible but rare.

Stock rocker ratio is 1.5 and they are in no way rollers for the LT1. LT4's came stock with 1.6 full rollers. They are both stud mount.
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Old Aug 29, 2003 | 04:52 PM
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QuikZilver's Avatar
QuikZilver
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From: Delray Beach FL
Default Re: Lt1 heads ???'s (Homer J)

Check out: http://www.corvettefaq.com/engine.asp
May have a lot of the answers you are looking for.
:cheers:
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