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241s to stock 243s.... worth it?

This is a discussion on 241s to stock 243s.... worth it? within the Internal Engine forums, part of the LSx Technical Help Section category; Is it worth the time to swap my 241s to 243s? I have an MS3 cam right now in it ...

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    sick & twisted SS 02_slp_ss's Avatar
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    241s to stock 243s.... worth it?

    Is it worth the time to swap my 241s to 243s? I have an MS3 cam right now in it will I have any issues with clearances? An I'm getting them for 400$ an only have 27k on them... I plan on porting an polishing them while they r off the car.. Any HP/tq #s would be nice or track times

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    Member importhater81's Avatar
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    Quote Originally Posted by 02_slp_ss View Post
    Is it worth the time to swap my 241s to 243s? I have an MS3 cam right now in it will I have any issues with clearances? An I'm getting them for 400$ an only have 27k on them... I plan on porting an polishing them while they r off the car.. Any HP/tq #s would be nice or track times
    Unless the 243's have been decked,ptv clearance should be o.k.,but the only way to be sure is measure.

    For $400,it's definately worth your time to swap the 241's for the 243's

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    sick & twisted SS 02_slp_ss's Avatar
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    Ok thanks for the info man, I'm gonna call Taxes speed an see what they say....... I think I seen that the combustion chamber is a little smaller then the 241s so that's y I was wondering if the valves would hit

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    Member importhater81's Avatar
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    Quote Originally Posted by 02_slp_ss View Post
    Ok thanks for the info man, I'm gonna call Taxes speed an see what they say....... I think I seen that the combustion chamber is a little smaller then the 241s so that's y I was wondering if the valves would hit
    The combustion chamber's are smaller on 243's,by about 3 cc's.

    I run a Ms4 with 243's with no ptv clearance issues. Texas speed is going to tell you to measure. Chances are you will be fine...but measure to be sure,especially if the heads were milled.

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    sick & twisted SS 02_slp_ss's Avatar
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    Quote Originally Posted by importhater81 View Post
    The combustion chamber's are smaller on 243's,by about 3 cc's.

    I run a Ms4 with 243's with no ptv clearance issues. Texas speed is going to tell you to measure. Chances are you will be fine...but measure to be sure,especially if the heads were milled.
    .
    Do u no what numbers ur made?

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    Member vette0009's Avatar
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    Quote Originally Posted by 02_slp_ss View Post
    Is it worth the time to swap my 241s to 243s? I have an MS3 cam right now in it will I have any issues with clearances? An I'm getting them for 400$ an only have 27k on them... I plan on porting an polishing them while they r off the car.. Any HP/tq #s would be nice or track times

    Well Chevy thought it was worth swapping 241's for 243's lol

    And I think $400 is a great price for 243's with 27k on them

    You can make great power with 243's

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    sick & twisted SS 02_slp_ss's Avatar
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    Quote Originally Posted by vette0009 View Post
    Well Chevy thought it was worth swapping 241's for 243's lol

    And I think $400 is a great price for 243's with 27k on them

    You can make great power with 243's
    Lol well u got a good point on that 1

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    Senior Member 00z28bubba's Avatar
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    stock 243's over stock 241's all day long. its a better flowing casting. a touch up on the tune will get the most power out of the swap. any internal engine mods should be followed up with a quality tune asap.

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    Junior Member sunburst02's Avatar
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    243 heads

    you can at times pick up some power using the 243's over the 241 heads

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    Senior Member 00z28bubba's Avatar
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    243's win majority of the time when compared to 241's.

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