Three6GMC

iTrader: (11)

Alright my turbo should be coming in in about a week or 2. Question is what compression ratio am i at and can I run 10lbs all day safely? I have read some places its like 9.5.1 then I have seen 10.5.1 My truck is a 2011 with the aluminum block vvt 5.3 i believe the lc9? Ill be running an intercooler and meth just fyi

Three6GMC

iTrader: (11)

So far this is what I got from gmpowertrain.com is this correct if so can i run 10lbs daily on 93 intercooled and on meth?

2009 Vortec 5.3L V-8 ( LC9 ) 8/25/2008
Type: 5.3L Gen IV V-8 Small Block
Displacement: 5328cc (325 ci)
Engine Orientation: Longitudinal
Compression ratio: 9.9:1
Valve configuration: overhead valves
Valves per cylinder 2
Assembly site: Romulus, MI
St Catherines, Ontario
Valve lifters: hydraulic roller
Firing order: 1 - 8 - 7 - 2 - 6 - 5 - 4 - 3
Bore x stroke: 96.01 x 92mm
Fuel system: sequential fuel injection
Fuel type: E85 and regular unleaded
Fuel shut off: 6000 RPM
catalytic converter
three-way catalyst
positive crankcase ventilation
Applications: Horsepower: hp ( kw )
Chevrolet Avalanche 310 hp ( 231 kW ) @ 5200 rpm SAE CERTIFIED ( gasoline as tested )
Chevrolet Suburban 326 hp ( 243 kW ) @ 5300 rpm SAE CERTIFIED ( E85 Flex Fuel as tested )
GMC Yukon XL
Chevrolet Silverado 315 hp ( 235 kW ) @ 5200 rpm SAE CERTIFIED ( gasoline as tested )
GMC Sierra 326 hp ( 243 kW ) @ 5300 rpm SAE CERTIFIED ( E85 Flex Fuel as tested )
Chevrolet Silverado XFE 315 hp ( 235 kW ) @ 5200 rpm SAE CERTIFIED ( gasoline as tested )
Emissions controls:
GMC Sierra XFE 326 hp ( 243 kW ) @ 5300 rpm SAE CERTIFIED ( E85 Flex Fuel as tested )
Chevrolet Tahoe XFE 320 hp ( 239 kW ) @ 5200 rpm SAE CERTIFIED ( gasoline as tested )
GMC Yukon XFE 326 hp ( 243 kW ) @ 5300 rpm SAE CERTIFIED ( E85 Flex Fuel as tested )
Applications: Torque: lb-ft. ( Nm )
Chevrolet Avalanche 335 lb-ft ( 454 Nm ) @ 4400 rpm SAE CERTIFIED ( gasoline as tested )
Chevrolet Suburban 350 lb-ft ( 475 Nm ) @ 4400 rpm SAE CERTIFIED ( E85 Flex Fuel as tested )
GMC Yukon XL
Chevrolet Silverado 338 lb-ft ( 458 Nm ) @ 4400 rpm SAE CERTIFIED ( gasoline as tested )
GMC Sierra 350 lb-ft ( 475 Nm ) @ 4400 rpm SAE CERTIFIED ( E85 Flex fuel as tested )
Chevrolet Silverado XFE 338 lb-ft ( 458 Nm ) @ 4400 rpm SAE CERTIFIED ( gasoline as tested )
GMC Sierra XFE 350 lb-ft ( 475 Nm ) @ 4400 rpm SAE CERTIFIED ( E85 Flex fuel as tested )
Chevrolet Tahoe XFE 340 lb-ft ( 461 Nm ) @ 4200 rpm SAE CERTIFIED ( gasoline as tested )
GMC Yukon XFE 350 lb-ft ( 475 Nm ) @ 4400 rpm SAE CERTIFIED ( E85 Flex fuel as tested )
MATERIALS
Block: cast aluminum
Cylinder head: cast aluminum
Intake manifold: composite
Exhaust manifold: cast nodular iron
Main bearing caps: powder metal
Crankshaft: cast nodular iron with undercut and rolled fillets
Camshaft: hollow steel
Connecting rods: powder metal
Additional features: Active Fuel ManagementTM
E85 Flex Fuel
Electronic throttle control
Extended life accessory drive belt
Extended life coolant
Extended life spark plugs
Oil Life Monitor System

bud8fan

iTrader: (9)

im running 8 psi safely and know for shure you can run 10...the DOD lifters are weak when pushed to hi performance and thats why i see alot of guys going to the DOD delete and ls7 lifters...just make shure you change out the cam as well ....

FarmTruc

iTrader: (5)

Hey bud8, just a quick correction, the DoD lifters are weak, and a lot of guys do the DoD Delete.
The vvt equipped only engines have "normal" lifters.
The dod equipped engines have the lifters in question.

i'm sure you knew since you had it done to yours, just clarifying.

Three6GMC

iTrader: (11)

Alright cool I'll order the dod delete kit from thunder and go with some ls9 head gaskets and arp head bolts while I'm there. I was planning on getting a eps cam already so will be fine there. Another question what plugs should I run? Right now I'm running ngk tr6 cuz I'm running nitrous are these fine or should I go with dif ones?

FarmTruc

iTrader: (5)

Those plugs are fine, but you'll need to gap them according to boost.
About .035" is typical.

bud8fan

iTrader: (9)

THANKS ALLEN..wasnt thinking...too much going on...corrected...lol

Three6GMC

iTrader: (11)

Cool thanks Allen, hey I might be calling you in a few weeks if I got time to take my truck up there for one of your tunes. The tuner who is tuning my truck right now is great and the truck runs good but I think you can get more out of it with your experience with the 6l80e and working on trucks on a daily basis.