i have a build thread on here aswell as some of you have seen but i finaly made some time yesterday and took the truck in for some dyno tuning with hp tuners.

the truck is my 1990 454SS and i swapped in a 35k mile 2003 4.8, z06 vette cam, ls9 gaskets, arp head studs, comp trunion rocker upgrade, holley high ram, 92mm dbc throttle body, 80lb injectors, i homemade my turbo kit, 0n3 76mm, 44mm wastegate, 50mm bov, snow stage 2 meth kit, 4l80e with 3400 billet converter, 14bolt rear with 3.73 and detroit locker.

16lbs, 14* of timing, non intercooled and on a 50/50mix meth single nozzle kit.

video>> Turbo LS swapped 454SS chevy truck - YouTube

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the truck


thanks for looking,
Jamie

 

Nice number man! Truck looks good too! You wana sell it? Lol

 

why only 5600rpm ?

 

glad to see you got it going. nice power. with out intercooler ,meth must be the sh... who tuned it?

 

we turned it to 6500 but surprisingly it made its power and torque where you see it on the dyno sheet.

 

Torque is barely barely starting to decrease. That thing would LOVE another 500 rpm minimum. I bet if you kept on spinning it until it stops making more power you'd see 675 hp at least. It's still climbing fast. The LS6 cam has a really late intake close and a really early exhaust open... That's why it has the manners of a small cam but on a dyno the graph tends to look like a much larger cam. I have one in a DD 6.0. In my eyes it makes mediocre power but it holds it forever!!

Do yourself a favor and give it a little more next time. I promise you don't be disappointed. That 4.8 loves rpm with the shorter stroke.

 

Need to lay your new dyno graph over your old one...

 

It may no longer be a "true" 454 SS but that 4.8 sure as hell makes more power than any 454 gm ever made lol.

 

4.8SS or 4.8TT

 

ive caught a ton of mouth from people saying i ruined the truck.....then after a few minutes they are all very interested in hearing what all i did to swap it and it all seems to be cool to them then..haha

i really have debated on taking my 454ss stickers off the side of it. i just cant bring myself to do it as of yet. i just finished tearing the truck all apart and painting it last winter and put all new decals on it at that time. it sure does look nice with them. im changing the exhaust in a couple weeks and going all the way out the rear of the truck with it, so it will sound like an old stock motor then and nobody will be the wiser

Jamie