.030 over iron 6L ,Manley forged rods ,CP forged 9:1 pistons ,Surface treated and chamfered stock iron crank, Cleaned up stock heads, 2.02 and 1.65 REV valves, Manley double valve springs, Manley titanium retainers, Harland Sharp 1.7:1 rockers, Manley pushrods, Bullet Racing cam 224/228 114LSA .570 lift, LS6 valley cover w/vent, LS6 timing chain, Lingenfelter high flow oil pump, MP112 blower, WCCH ported j tube, 90mm LS2 throttle body, JBA shorty headers, Stock cats (whats left of them at leaset), Magnaflow 3” single cat-back, PCV eliminated with catch can and vent, Permacool dual fans


489hp and 525tq at the wheels with 20" wheels and built 4L80e in 2003 RCSB Sierra 1500. 8psi on 91 octane and 100 F outside air.

future....TVS or 112H, long tubes (american racing headers looking really tasty 1 7/8 x 3 w/dual 3"), possibly methanol. ANY SUGGESTIONS??

im new to the forum...but ive ben around the toys or quite a while...

 

thats pretty conservative amount of boost, although you would most likely need meth to support the added boost...

i assume in Cali that 91 octane is all you can get.. so cant really do more with the timing and lack of meth.

i would put some meth to it and up the boost a bit, maybe 10-12 psi or so, should still be fine with the internals you have there...

someone feel free to correct me, i am no FI expert, i have helped a few friends work on their FI setup though..


thats is a nice number you put down, considering fairly low boost and 91 octane tune, with that air temp.

congrats.

 

the bottom end is good for 800...so no worries there.

im gonna head back to the dyno this winter to take advantage of lower temps.

with the 2.8 pulley the inlet temp is getting up there on my gen 5 mp112

im leaning towards methanol and long tubes right now....then a blower upgrade... =)

thansks for the heads up.

 

I ran the JBA's an resisted long tubes for a while...What puley are you running? Ooops, I see you posted the 2.8 so you are about pulley'd as low as I'd want to go. Long tubes will drop your boost # a lb or so but you'll gain power with the less boost. Meth may allow a bit more timing with the available boost.

 

exactly....

im thinking methanol and long tubes with a good tune. also considering MP112HH for more efficient (cooler) boost.

or slow the blower down with a bigger pulley to reduce temps and run more timing.

as it site right now, it is still fun as hell.... 79 mph 2-3 shifts @6000rpm with 4:10 gears and the 4L80e

 

Boost > timing...that is too a point I dont think you'd make more power running a 3" pulley and adding timing but getting a cooler charge and running some meth will morethan likey allow the increased timing with the boost you make. Going to a 112HH from a MP112 going to make a difference? Have to ask BC about that one but I don't think so. Running a TVS is the next step up in blowers imo. Tuning...what do you have now?

 

TVS is the right move, just not the cheapest toy. Tuning...Los Angeles Performance Division. w/HP tuners. cant remember exact timing. I have my feelers out regarding the HH or mp112 or TVS. most likely go with methanol, LTs and a new tune. TVS in due time.

 

I think those are awesome numbers without headers and meth!

Headers and meth should be good for at least another 25-30rwhp. The 2.8 pulley is spinning the blower pretty fast, especially without meth.

 

thanks man.

your TOG headers... 1 3/4 x3? dual 3 or 2.5 exhaust?