Supercharged 5.3
09-04-2018, 10:25 AM
#1
On The Tree
Thread Starter
Supercharged 5.3
I have a 2006 Sierra I’m thinking about putting a supercharger on. How much psi can I run on the stock head bolts, the kit I’m looking at says it runs 6-8 psi it’s the ls swap vortech. https://www.lsxceleration.com/vortec...ls-truck-fead/
09-04-2018, 10:36 AM
#2
I ran 12psi through my otherwise stock 2002 5.3, did it twice.
Round one: stock exhaust, LS9 cam, P1SC w/ w2a: 477whp
Round two: Full exhaust, 3.5" w/ TSP 1 7/8 LTs, 212/218x .550 cam, P1SC: never dyno'd
I am actually looking to sell the P1 kit, if you're interested.
But to answer your question, I wouldnt open the motor. Just run it.
Round one: stock exhaust, LS9 cam, P1SC w/ w2a: 477whp
Round two: Full exhaust, 3.5" w/ TSP 1 7/8 LTs, 212/218x .550 cam, P1SC: never dyno'd
I am actually looking to sell the P1 kit, if you're interested.
But to answer your question, I wouldnt open the motor. Just run it.
09-04-2018, 11:56 AM
#4
TECH Junkie
Goes without saying tune needs to be on point or you can easily lose it at 7-8 lbs. My truck is at 10 and with a custom tune its fine. 07 was 8.5 and it trashed several pistons because of a too aggressive tuner. Forged 6.0...same result. Also, address your trans for sure. Good luck and have fun!
09-04-2018, 01:13 PM
#5
You will want to investigate a couple things:
A) Good tuner (I trust mine with my life, and he hasnt let me down yet)
B) Gen4 MAF (and scale the table accordingly) or speed density operating system w/ 2Bar MAP
C) Bigger pump: I have a Walbro 255, supposedly will support 500hp, I think thats pushing. I would say 420 to be safe for a long time. I made 477 for ~10k mi, but I wasnt WOT the whole time. We were certainly running out of fuel on the Walbro with 12psi. Consider the 477 a glory pass.
A) Good tuner (I trust mine with my life, and he hasnt let me down yet)
B) Gen4 MAF (and scale the table accordingly) or speed density operating system w/ 2Bar MAP
C) Bigger pump: I have a Walbro 255, supposedly will support 500hp, I think thats pushing. I would say 420 to be safe for a long time. I made 477 for ~10k mi, but I wasnt WOT the whole time. We were certainly running out of fuel on the Walbro with 12psi. Consider the 477 a glory pass.
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09-05-2018, 08:19 AM
#8
I ran 8-9 psi for three years then bumped it up to 11- 340 miles later it ate a bearing this year
that was a 04 lm7 with milled heads and tr220 cam running at 11.4 afr and 10 degrees before IAT temps got to high and would drop to 6 degrees - running a walbro 255 in tank- made 417 wheel last year before pulley swap
that was a 04 lm7 with milled heads and tr220 cam running at 11.4 afr and 10 degrees before IAT temps got to high and would drop to 6 degrees - running a walbro 255 in tank- made 417 wheel last year before pulley swap
09-05-2018, 11:56 AM
#9
On The Tree
Thread Starter
I ran 8-9 psi for three years then bumped it up to 11- 340 miles later it ate a bearing this year
that was a 04 lm7 with milled heads and tr220 cam running at 11.4 afr and 10 degrees before IAT temps got to high and would drop to 6 degrees - running a walbro 255 in tank- made 417 wheel last year before pulley swap
that was a 04 lm7 with milled heads and tr220 cam running at 11.4 afr and 10 degrees before IAT temps got to high and would drop to 6 degrees - running a walbro 255 in tank- made 417 wheel last year before pulley swap
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