Ls9 heads
11-07-2010, 06:08 PM
#1
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Ls9 heads GUYS
what is the differance beetween a ls9 head and a ls3 head ? streangth/ 6 bolt / port shape valve size
comp ratio ect
i thought they were the same but i see that a lot of the big shops are building LSX engines with ls9 heads in stead of the ls3 or ls7 heads ??
what is the differance beetween a ls9 head and a ls3 head ? streangth/ 6 bolt / port shape valve size
comp ratio ect
i thought they were the same but i see that a lot of the big shops are building LSX engines with ls9 heads in stead of the ls3 or ls7 heads ??
Last edited by red 454; 11-07-2010 at 06:16 PM.
11-08-2010, 02:21 AM
#2
TECH Resident
IIRC slight revision to swirl pattern with a fin in the intake port plus use 13mm bolts. And they are rotocast and potentially less porous due to the rotocasting method. Still 4 bolts per cylinder, 10 major bolts total.
11-08-2010, 09:22 AM
#3
Correct, except they are 12mm bolts vs. standard LS 11mm. Also LS9 block and heads are made from the same 356-T6 material as the C5-R block.
11-08-2010, 11:25 AM
#5
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I believe they have thicker decks and some more material between the valves.
Also, they come with Titanium intake valve and Stainless exheust valves.
Port design and flow should equal the LS3's as far as I have been able to find out (except for the swirl wing).
Also, they come with Titanium intake valve and Stainless exheust valves.
Port design and flow should equal the LS3's as far as I have been able to find out (except for the swirl wing).
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11-12-2010, 07:50 PM
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looking for some thing with ls3/9 ports to suite my harrop blower manifold and 2300 but will suite a bit more boost then i have now (10 psi on stock internals ls3 )and hold the sleeves in place better
11-14-2010, 10:47 PM
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11-26-2011, 07:15 AM
#11
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I guess the more obvious question would be if the Ti valves will fit ls3/l92 heads?
07-22-2015, 04:50 AM
#12
http://www.jegs.com/i/Chevrolet+Perf...13963/10002/-1
The part number for the LSX-LS3 cylinder head is 19201805.
http://www.jegs.com/i/Chevrolet-Perf...ductId=1297514
Last edited by Camaros-n-Chevelles; 07-22-2015 at 05:00 AM.
