RS/SS 4.8

iTrader: (13)

Sweet build. Exactly what im doing except with forged internals. But now u got me thinking of just replacement pistons since mine will also be a daily that sees 500 miles a week and carries crap on the bed regularly.

grey matter 04

iTrader: (9)

Heres a few pics from the build and a installed pic.
Put about 200 miles on it so far runs strong.
Got a lil tune done pulls strong till 6700 maxxing out my regular 8.1 31# injectors. At 6700rpm they are running at 108% duty cycle.Will swap in some 36 flex fuels soon.

Only made one pull to get a half way decent tune on it but its a beast.

Most say a 224r is to small of a cam for a 370 but it works perfect with my 390 gears and 3200 stall.Doesnt lack power or torque at any rpm!

Chevy_King1500

iTrader: (7)

sweet build! i do have some flex fuels laying around i will sell ya. just need the adapters for them to work!

grey matter 04

iTrader: (9)

I have a set of flex fuels sitting in my 90mm intake setup.
I want to get it broke in before I start swapping the intake.

GMCtrk

iTrader: (27)

Im surprised those injectors are only at 108% duty cycle. So I think the 36 lbers should be okay, but they may be over 80% IDC. When I was N/A at sea level with the 44 lb marines I was seeing 70% IDC (only 55% at 3000 ft above sea level lol)

grey matter 04

iTrader: (9)

heres a idle video ..i suck at videos idle vid 1 - YouTube

another idle and truck video
idle vid 2 - YouTube
Videos taken with full exhaust..LT headers,3 inch y-pipe no cats 22 inch magnaflow big case muffler

Did the 1st oil change..oil looked clean coming out no metal only found some very light glitter inside the filter when cut open.Had to pour the filter oil on a black pan to see it.

Lowexpo

Sounds great! My Tahoe needs something like that.

Chevy_freak

Have any plans on a dyno run, especially one that will show low end torque?

I want to put something like this together but it's hard to decide when all the dyno sheets start at 3k+rpm and I'm wanting a motor that will pull strong right off idle, with no desire to pull over 6k. Also want to stick to around a 2k stall since I will already have heavy tires and it will see a fair bit of time towing and puttering around the mountains.

truck sounds good, makes me want to rip off my **** and get a real exhaust in my yukon.

grey matter 04

iTrader: (9)

I plan to dyno it once it has some miles on it.
It pulls really good at part throttle down low.
Powers there no waiting for it to come on

grey matter 04

iTrader: (9)

Hit the rollers the other day made 395hp and 403tq.
Full exhaust and stock 78mm truck intake.