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Educate me please about H/C

This is a discussion on Educate me please about H/C within the Internal Engine forums, part of the LSx Technical Help Section category; I did all the search possible and still can't get some answers. I want to upgrade my H/C I want ...

  1. #1
    Random Pics King FSANE's Avatar
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    Educate me please about H/C

    I did all the search possible and still can't get some answers.


    I want to upgrade my H/C

    I want the MS4 cam, but don't know what Heads to buy with it. I have about $2,000 to play around with for the whole package including gaskets, chain and oil pump.

    So far what I found out is that with the MS4 cam there are some clearance issues with the valves and the pistons. Something about "ptv contact on MS4" what the heck is PTV? is it Piston Touching Valves?

    Is it smart to have a stock bottom end?


    My goal is to Run mid 11's N/A and Mid 10's on spray.


    My current mods are:

    Stage 1 p&p 98 heads
    227/227 cam
    3600 stall
    12 bolt with 3.73's
    Suspension done (lca, tq arm..ect) except shocks
    150 shot NX system.
    6pt roll cage
    and other bolt ons.

    With the spray i did 11.1 @ 120 mph with 1.47 60ft.

    I want to go faster.


    thanks for any input.
    Last edited by FSANE; 09-23-2007 at 01:15 AM.
    02 T/A AUTO Metalic Silver. 07 YARIS 5sp 40mpg BABY .
    Best ET is 11.13 @ 120 MPH with 1.47 60FT 11.13 sec vid /////// BurnOut Vid
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    Senior Member Wheeler99WS6's Avatar
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    black, 05 Roush
    black, 99 T/A WS.6

    How about some stage 2 LS6 heads and a mid 230 duration cam along with a FAST 90/90 combo? I would think that they would put you in mid 11's pretty consistently N/A. Assuming you already have all the supporting mods headers, etc.
    1999 T/A WS6 Black -------SOLD
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    Alien Baby FuriousGeorge's Avatar
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    hmmm, you'd be hard pressed to get everything for a h/c swap for 2k. but if you can, awesome. yeah the ms4 is big enough that you are more than probably going to have to flycut your pistons due to PTV (piston to valve) clearance. if you don't flycut them, you pistons will probably hit your valves...ouch. hmm, that cam with a decent set of heads will get you somewhere around 450 rwhp. if you still spray on top of that, i would be worried about your bottom end. i would atleast make it a progressive shot and toss in a set of katech rod bolts to your bottom end. even with that, i'm not sure how long she'll hold up.

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    Random Pics King FSANE's Avatar
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    Quote Originally Posted by FuriousGeorge View Post
    hmmm, you'd be hard pressed to get everything for a h/c swap for 2k. but if you can, awesome. yeah the ms4 is big enough that you are more than probably going to have to flycut your pistons due to PTV (piston to valve) clearance. if you don't flycut them, you pistons will probably hit your valves...ouch. hmm, that cam with a decent set of heads will get you somewhere around 450 rwhp. if you still spray on top of that, i would be worried about your bottom end. i would atleast make it a progressive shot and toss in a set of katech rod bolts to your bottom end. even with that, i'm not sure how long she'll hold up.
    Ok whats a Flycut and how do I Flycut my pistons?

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    Alien Baby FuriousGeorge's Avatar
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    http://ls1tech.com/forums/showthread...ghlight=flycut

    there you go man, it's a good read.

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    Random Pics King FSANE's Avatar
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    Quote Originally Posted by FuriousGeorge View Post
    http://ls1tech.com/forums/showthread...ghlight=flycut

    there you go man, it's a good read.
    Holy crap, I would never want to try to attemp that....Nooo way.

    Is there other way? like thicker gasket or something?

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    Senior Member Bottesini's Avatar
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    Once you start using something like a thicker gasket you are going to lose compression and maybe even negate the benefits of such a big cam. (just my first thought on that subject, sure there are some there with actual experience in this)

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