foose04

iTrader: (4)

Made a couple pulls tonight at 15psi and put down some good numbers. Was real happy with the lil 4.8L. Like to thank kyle at KB-Racing for the awesome bolt on turbo setup.



Little Video I put together....

http://www.youtube.com/watch?v=V9nRm6vZl_I

Redneck 572

ha damn I didnt think those lil 4.8 could make those nums how is it holdin up to all that power?

hotrodscrap

iTrader: (10)

Nice!!!

-SS

BHSS4142

iTrader: (1)

Awesome truck man and good choice of music!

| Powered by Satan |

nice!

1gt2nv

iTrader: (5)

Badass truck! Looks very nice to.

DiscerningZ32

Those are great numbers. Is that on the stock short block?

Those 4.8l's sure love boost.

Skillet

I had no idea the 4.8s could make that much power. Very impressive!

Hybrid86Z

iTrader: (2)

for a 4.8L w/ an LS6 cam/springs and a bolt on turbo kit....granted running E85 and 15lbs....thats pretty sick

What fuel system you running to work w/ the E85?

edit - you also running the stock 4.8L intake? Keeping it for the TQ increase over an LS6 I take it?

Nice numbers btw!

MYSTIC-1SC

iTrader: (14)

very nice results.

violent_celerity

That's badass! Is your truck the 5 speed or an auto? I didn't know if the 5 speeds could handle that kind of power.

MeentSS02

iTrader: (11)

How 'bout some street vids? That's a nice ride for sure.

foose04

iTrader: (4)

Thanks guys, she pulls pretty good turned up on the 15psi. I made a couple pulls at 10-11psi on the streets, prior to the 305 Nitto 555r's, but she's still tough on tires even with the DR's. It is a 5speed, but doesn't like fast shifts at all with this TQ.

http://www.youtube.com/watch?v=ukLjDCxuc9E

http://www.youtube.com/watch?v=DqLU5...eature=related

foose04

iTrader: (4)

Hybrid86z, the fuel system is E85, Dual Walbro's, 8an return style, ls1 rails, 80lb injectors at 56psi base, so there rated at 92lb. On the dyno I was at 82% injector duty cycle.

I stuck with the truck manifold mainly because I was lazy and didn't want to swap. So far, only revving to 6300 it seems to hold HP/TQ pretty well. This 67mm turbo is tapped, but if I was to run a larger turbo and needed more RPMS, I'd consider a maniofold swap.

violent_celerity

That is such a badass truck! what 5 speed even comes in those trucks?

67Firebird455

iTrader: (27)

Man, sorry to bring up an "old" thread but I'm putting a 4.8 with rod bolts, with LS6 cam and 6.0 heads in my 67 firebird and this really motivates me. I'm just shooting for over 500whp through a TH400 & 9" at 15psi with meth injection (yes, it's intercooled).

Purple95Z28

iTrader: (6)

Wow how long is that thing going to hold up under 15lbs?

87LX5.SLOW

I have heard of many people running 5.3's and a few 4.8's for a few years running 10+psi. Its all about a proper tune and proper fueling, detonation is what kills the motors.

67Firebird455

iTrader: (27)

My 4.8 is running roughly 8.60:1 with the 6.0 heads. Methanol, 91 and 15psi sounds like a damn good combo to me! I'm running 60lb mototrons with twin 255's so fuel isn't an issue. E85 is dang promising though, just look at those numbers!

Cole Train

iTrader: (30)

Damn. My last truck was a Regular cab Step side silverado 4x4 with a 4.8 and a 5 speed Makes me wish i kept it