MS4 in a stock LQ9
i was told by tsp that the cam would work in the lq9 long block. i got the ms4 patriot dual springs and 7.425 pushrods that im throwing in my lq9 swapped 98z next month after it goes through inspection
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Verdad Gallardo I am not an authority on LS heads, but I was not aware that the extra chamber volume on the 317 heads was achieved by a taller chamber with a higher valve location than the ls1 heads. I thought the difference in volume was due to a more open chamber and the valves were in the same location. Could any one clear this up?
Thanks again,
Darren
Thanks again,
Darren
Last edited by darren s; Jan 21, 2010 at 05:51 AM.
I am not an authority on LS heads, but I was not aware that the extra chamber volume on the 317 heads was achieved by a taller chamber with a higher valve location than the ls1 heads. I thought the difference in volume was due to a more open chamber and the valves were in the same location. Could any one clear this up?
Thanks again,
Darren
Thanks again,
Darren
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Largest Stocking Distributor of LS-x Engines / CHECK OUT OUR NEW WEBSITE!
COMP - FAST - PACESETTER - DIAMOND RACING - EAGLE SPECIALTY PRODUCTS - CALLIES - COMETIC GASKETS
RAM CLUTCHES - MOSER ENGINEERING - KOOK'S HEADERS - ARP - GM BOLTS AND GASKETS - MSD - NGK
POWERBOND - ASP - AND MORE!
Darren
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Joined: Sep 2009
Posts: 2,481
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From: PA/MD
I'd atleast be ready to pull the heads anyway to mill them down alittle...even if it means valve relifes to get the compression up some... I don't see why it wouldn't drop right in, but why leave power potential on the table with the stock comp ratio
(but mostly a nothing budget 
) Besides, 10:1 isnt too bad. I'd worry about it more if I had the LQ4The 2.165 intake valve would leave you with less ptv than the 2.00 intake valve in the 317's
LOL, it's tough to be fast AND broke. My 10wk old daughter started daycare last week, $600/mo!! I knew it was coming, but it still knocked a big chunk out of my hot rod budget. Gotta take care of the little ones first
Your valve drop with the LQ9 & 317 castings will allow the MS4 to clear no problem 
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Jason
Co-Owner, Texas Speed & Performance, Ltd.
2005 Twin Turbo C6
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Jason
Co-Owner, Texas Speed & Performance, Ltd.
2005 Twin Turbo C6
404cid Stroker, 67mm Twins
994rwhp/902lb ft @ 22 psi (mustang dyno) www.Texas-Speed.com
You might want to think about upgrading your valve train. A LS2 timing chain and PRC springs with good pushrods might be good insurance. If your going to pull the heads you might just as well.....jeez.... here we go...............
