Josh
Region: US
Thursday 03 September 2026 21:52:13 GMT
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438Nephew :
are you getting the rotating assembly balanced or just throwing it all together? I'm debating on new pistons and rods but don't wanna pay to do all of that. its my first garage build
2026-09-05 01:46:37
1
hayden🇺🇸 :
The 317 and 243 have the same exact specs besides the 317 having a larger chamber lowering compression, a stock 243 and flat top pistons would probably be around 10:1 and that’s fine for what you’re trying to do
2026-09-04 19:15:50
0
Binka :
use the ones you have
2026-09-05 06:27:07
0
Ryan Anenson :
if youre doing boost lower compression is typically better
2026-09-04 19:44:39
0
franciscoguerra177 :
823 heads
2026-09-04 23:54:21
0
jlp :
799 heads
2026-09-03 21:57:51
9
wayno130 :
317 heads for boost, 243 for na less cc
2026-09-04 13:24:47
4
goldenfcrx :
with boost heads dont matter lol just feed it more pressure
2026-09-03 22:20:43
4
Goatboy :
Port the 243
2026-09-04 03:57:29
0
eskimo built :
799/243. it will make more low end power
2026-09-04 02:13:44
2
aj :
I have a lq9 and I’m using 706 heads with ls9 gaskets, so far haven’t had issues with the 706 heads might wanna take into consideration
2026-09-03 21:57:33
4
Typing typing :
For boost you want low compression I’d say 317
2026-09-04 04:08:08
0
Joe :
823 bro, take advantage of the fact it bore can accept those heads. Better flow and compression for a turbo build
2026-09-04 00:24:39
5
Turbo408s10 :
317 if you’re good with a boosted build, 243 or 706 if a NA build
2026-09-04 10:18:45
2
Kellz94$ :
Your sitting with one of the best heads for boost. 317 will be able to go further than others cuz of the bigger chamber..stick with what you have bud
2026-09-03 22:32:05
4
2SLOW_SIERRA :
823 rec ports 👌
2026-09-04 06:03:03
1
REZ :
823 heads
2026-09-03 22:02:01
1
ZODD :
600 HP 6.0 here. 13:1 compression with 6cc dome pistons. .040 milled and ported 243s, going in E85.
2026-09-04 03:32:35
1
ls2_j3sus :
823 head
2026-09-03 23:22:29
1
sixtwojason :
Ls3 top end.
2026-09-05 19:48:01
0
thatpaidfor5.3 :
799
2026-09-04 15:48:17
0
️ :
If you’re staying under 1000hp, just keep the stock heads they flow well enough to support that.
2026-09-04 15:19:54
0
Jordan :
Go with some 823 rec heads
2026-09-04 16:17:07
0
dino :
get the btr canted valve cathedral port heads, back cut the valves,multi angle valve seat job and throat blending. 90% of you velocity and cfm at 200-500 lift, you can get q 600 -620 lift cam ,fat ass torque curve ,breath to 7k+ if you want and you won't be replacing springs every 20k miles
2026-09-04 16:10:27
1
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