243s or L92s
07-09-2012, 10:11 PM
#21
is pretty easy to understand what head does what:
LS3 heads = mid to upper range power in the upper rpms, of course you will loose torque, ( static compression ) they are a badass flowing head meant for large cube motors, though i made them work on a 4" bore it took other parts to compensate for what i lost, but im also not talking about towing here!!!
thats short form
243s = low to mid range torque ok to 6k-6800 rpms. ported probably higher but not much
bottom line if youre building a truck to tow like mentioned in that post yeah it was a poor decission to go with ls3 heads! but if youre building a truck to do some racing then its the opposite.
LS3 heads = mid to upper range power in the upper rpms, of course you will loose torque, ( static compression ) they are a badass flowing head meant for large cube motors, though i made them work on a 4" bore it took other parts to compensate for what i lost, but im also not talking about towing here!!!
thats short form
243s = low to mid range torque ok to 6k-6800 rpms. ported probably higher but not much
bottom line if youre building a truck to tow like mentioned in that post yeah it was a poor decission to go with ls3 heads! but if youre building a truck to do some racing then its the opposite.
But since he said he was not going to the track very often, I personally felt he would be better served staying with the cathedral port heads.
07-10-2012, 05:57 AM
#22
Well I'm trying to make as close to 400hp to the wheels as possible then I'm planning on spraying about 150 shot on top of that! I don't really run the truck at the track much but I do like to mess around on the street alot. And I like knowing I have the power when I need it. Ya no what I mean!
lol you talking about my setup? what cam do you call big? i ran a 232/238 cam with a l92/ls3 head combo, lost of torque is minimal . then again pending on how you wanna make it up which isnt hard the biggest cam allowed on my setup was a 235/239 this is on a stock lq9 shortblock. i say cams up in the 260s are big
what you see in my sig is what it putdown with a 232/238 cam i never got to dyno the 235/239 cam but it was promising to tip 500
the biggest cam allowed on my setup was a 235/239 this is on a stock lq9 shortblock. i say cams up in the 260s are big what you see in my sig is what it putdown with a 232/238 cam i never got to dyno the 235/239 cam but it was promising to tip 500
Op,
Imo, cathedral ports for a street truck.
Some good reads:
L92 heads off, AFR 230 V2 heads on, 504rwhp 6.0L automatic! (now with track results). - LS1TECH
Square Port heads vs. Cathedral Port heads - LS1TECH
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