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  1. #1

    Default 2.02/1.60 valves in stock lt1 heads

    does anyone know what seats are needed to put 2.02/1.60s in the lt1 heads?

  2. #2
    Lurker


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    Not sure mine came like that when I got my new engine

  3. #3
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    You need a butt load of pocket portwork done to unshroud it for 2.02 1.60.... you would be looking at LE3 heads at that point...

  4. #4
    10 Second N/A Club


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    FWIW I asked about upgrading my LE2's with the bigger valves and LE told me the gain in performance wasn't worth the labor needed to put that size valve in a stock head (aprox. 10 hp for a 400+ rwhp car). Sorry I know that doesn't answer your question.
    -Josh
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    96, N/A 385, Holley EFI, Faceplated M6, AI TFS heads, LE SR cam, MWC Fab 9
    10.68 @ 129 1.57 60'........still workin on that 60' shootin for 1.4's!

  5. #5

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    Yea there is 9 second cars with the 2.00" valves in ported stock heads which takes no seat replacement. If your goal is bigger than that you may be better off with aftermarket heads. I too am sorry about no legit answer, just legit info.
    '94 Formula m6: AI 200cc h/c - MWC - Moser 12bolt

  6. #6
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    got mine on the stock seats

  7. #7
    The FABRICATOR!


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    2.02/1.60 on stock seats? if the machine shop didn't open them up for the larger valves, you're not getting the full benefit of larger valves. If he did then he cut through the hardened surface of the seats. If this is the case, the longevity of the seats has been greatly diminished.

    Again, not helpful to the OP. Sorry.
    Last edited by firebird_1995; 05-05-2012 at 04:29 PM.
    Chris
    1985 Monte Carlo SS
    Mods: 9:1 383 LT1, Ported Trick Flow heads, D1SC Procharger, 4L80E, 3.50 9"
    Check out the M122 MCSS build thread here!

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