need info on my turbo 5.3 build. experienced people please help
#1
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need info on my turbo 5.3 build. experienced people please help
My 5.3 is at the machine shop right now and im trying to decide if i should use forged 5.3 pistons or go to a 3.90 bore and use forged ls1 pistons. i will be using 317 heads that have been worked over a little bit.... milled slightly and ported. we are saying 9:1 compression right now with PRC 650 springs ect...
The main thing i am asking is about bore size.
should i go to 3.90 bore to unshroud the valves to increase airflow or would leaving the bore almost stock be better since it would leave more gasket between the cylinders, have thicker cylinder walls, and less surface area pushing against the heads.
Am i missing anything or thinking to much into this?
The block will have:
mains doweled
surfaced
torque plate will be used
balanced rotating assy
clean/mag
oiling mods
arp head studs/arp rod and main bolts
forged rods and pistons
polished crank
the hp It will make depends on how much boost it will take before it lifts the heads. i am wanting at least 650-700hp which i think will take about 15psi to make but if it will hold 20psi i will do it.
i am considering a few different turbo kits, right now the main 2 kits are the 417 motor-sports twin turbo kit, with precision 62mm turbo's and the other kit is KY turbo's single 76mm precision turbo kit.
I am new to boost so any help will be greatly appreciated!
thanks!
The main thing i am asking is about bore size.
should i go to 3.90 bore to unshroud the valves to increase airflow or would leaving the bore almost stock be better since it would leave more gasket between the cylinders, have thicker cylinder walls, and less surface area pushing against the heads.
Am i missing anything or thinking to much into this?
The block will have:
mains doweled
surfaced
torque plate will be used
balanced rotating assy
clean/mag
oiling mods
arp head studs/arp rod and main bolts
forged rods and pistons
polished crank
the hp It will make depends on how much boost it will take before it lifts the heads. i am wanting at least 650-700hp which i think will take about 15psi to make but if it will hold 20psi i will do it.
i am considering a few different turbo kits, right now the main 2 kits are the 417 motor-sports twin turbo kit, with precision 62mm turbo's and the other kit is KY turbo's single 76mm precision turbo kit.
I am new to boost so any help will be greatly appreciated!
thanks!
#2
my opinion..
folks are buying 100k motors at junkyards daily for 300-500 and plopping a turbo system on and almost achieving 700hp,600 for sure...your arp hardware alone cost that much alone,seem like alot of wasted money boring,pistons,rods,rings,polishing....yada yada...
but its your motor,sound like a nice build
folks are buying 100k motors at junkyards daily for 300-500 and plopping a turbo system on and almost achieving 700hp,600 for sure...your arp hardware alone cost that much alone,seem like alot of wasted money boring,pistons,rods,rings,polishing....yada yada...
but its your motor,sound like a nice build
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Am i missing anything or thinking to much into this?
The block will have:
mains doweled
surfaced
torque plate will be used
balanced rotating assy
clean/mag
oiling mods
arp head studs/arp rod and main bolts
forged rods and pistons
polished crank
the hp It will make depends on how much boost it will take before it lifts the heads. i am wanting at least 650-700hp which i think will take about 15psi to make but if it will hold 20psi i will do it.
i am considering a few different turbo kits, right now the main 2 kits are the 417 motor-sports twin turbo kit, with precision 62mm turbo's and the other kit is KY turbo's single 76mm precision turbo kit.
I am new to boost so any help will be greatly appreciated!
thanks!
The block will have:
mains doweled
surfaced
torque plate will be used
balanced rotating assy
clean/mag
oiling mods
arp head studs/arp rod and main bolts
forged rods and pistons
polished crank
the hp It will make depends on how much boost it will take before it lifts the heads. i am wanting at least 650-700hp which i think will take about 15psi to make but if it will hold 20psi i will do it.
i am considering a few different turbo kits, right now the main 2 kits are the 417 motor-sports twin turbo kit, with precision 62mm turbo's and the other kit is KY turbo's single 76mm precision turbo kit.
I am new to boost so any help will be greatly appreciated!
thanks!
#6
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the goal is 800 plus, i just didnt know if the heads will handle that much boost without lifting. i am getting a good deal on the machine work so that helps.
i dont want to worry about maxing out the block in the future, i want to do the engine once and be done.
i dont want to worry about maxing out the block in the future, i want to do the engine once and be done.