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4.8l build?

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Old 12-27-2007, 04:46 PM
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Default 4.8l build?

ive found a 4.8 shortblock outta a 2000 GMC truck, guy pulled it out to put a 6.0 in its place. i was wondering what i could do motor wise to get me into the 250-275rwhp range, since it has no heads, i was just gonna pick up some 853s, and stock LS1 intake, and a decent cam.

honestly id like to go turbo, like a masterpower t70 with a .68 hotside, but i dont know what i would have to do as far as a tune, i know id have to up the fuel system, but no idea where to otherwise. ive built a blowthrough carb mustang but im new to fuel injection.

what could i do as far as the wiring harness?...id thought of using the MSD 6ls box for the sensors and such, and megasquirt for the fuel injection .its gonna be going into a 1980 malibu with a built/stalled th350....id like to keep the convertor fairly tight as this will be a "daily driver"

id appreciate any opinions/suggestions good or bad....

tim
Old 12-29-2007, 12:01 AM
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no love for the little 4.8?
Old 12-29-2007, 12:05 AM
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headers, tune, cam you would be at 275whp or more.
Old 12-29-2007, 05:07 PM
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any suggestions on cam?....of course id like to have a huge cam with a major lope, but it wont be very driveable, i would like to have one that sounds good and makes good power
Old 12-30-2007, 05:35 PM
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bone stock with a tune, and electric fans will make 250hp
Old 12-30-2007, 05:39 PM
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well plans have changed, i got a different car i can drive daily(92 accord ) so this car isnt gonna be a daily any longer, so im gonna do a cam, stock heads, s400 turbo, and a small shot of nitrous to get it to spool, only reason for the big turbo now, is the plan for a l92 headed 6.0 down the road....i plan on going into the 10s with the 4.8 though...
Old 12-30-2007, 06:11 PM
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Originally Posted by durty
i plan on going into the 10s with the 4.8 though...
how???

how much does the car weigh?
Old 12-30-2007, 06:15 PM
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3300lbs if i remember right.....

there is a guy with a stock 5.3 with a cam, t76 w/ 12lbs in a notchback mustang, went 11.0@ 134....i think the cammed 4.8 with a nitrous shot should get me into the 10s....
Old 12-30-2007, 08:38 PM
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Originally Posted by durty
i think the cammed 4.8 with a nitrous shot should get me into the 10s....
I know that a shot of nitrous on a cammed 4.8 will NOT get you into the 10's. The fastest pass ever by a 4.8 was 11.8 and that was run by a fully forged 4.8 with a 67mm turbo at 17lbs of boost.
Old 12-30-2007, 08:51 PM
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Originally Posted by durty
3300lbs if i remember right.....

there is a guy with a stock 5.3 with a cam, t76 w/ 12lbs in a notchback mustang, went 11.0@ 134....i think the cammed 4.8 with a nitrous shot should get me into the 10s....
a fox body is going to be lighter than the malibu..how big of a shot you going to hit it with??..a forged 4.8 with heads, 230+ dur cam, 4000+ stall and 250+ shot and you might hit a 10


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