skidder07

I plan on swapping a ls motor in my 2002 Gmc Sonoma. I have already did the pre fab work to fit the engine between the frame rails. Also have a holley oil pan. I have a 4.8l sitting around. Not sure if i should use it or not. i was thinking about a 5.3l or 6l with trick flow top end kit and a fast intake. Any help would be great.

madmike9396

iTrader: (29)

Umm what exactly is the question?

skidder07

should i build the 4.8l or am i wasting my money and time

madmike9396

iTrader: (29)

4.8 can be stout ! What is your end goal / budget?

skidder07

400hp or so. thats what im hoping for

madmike9396

iTrader: (29)

Yes a head cam 4.8 will easily make 400+hp. Manual or auto ?

skidder07

want a t56 behind it. would a trick flow top end kit work well?

madmike9396

iTrader: (29)

Honestly Id get in touch with a vendor here. They will be able to give you information on what you will need for your goal. Such as what heads cam specs etc etc

Texas speed performance
(SRD) Smallwood Racing Development
Tony mamo Mamo motorsports

Are a few that come to mind

skidder07

thanks

tfi racing

iTrader: (2)

Maybe not a waste,but you likely won't be happy with the 4.8. Sell it off and put the cash towards a 6.0,putting $4k worth of heads,cam and intake on a 4.8 to barely out hp a bigger motor is not the best idea...

madmike9396

iTrader: (29)

So you saying a H/C/I 4.8 is going to barely out hp a stock 6.0 ?

transamtom

iTrader: (8)

Do a search for 4.8L on Hotrod.com.

They thought they had a 5.3 and they wanted to see how much spray or boost it could take before it went boom.

They couldn't kill it and made nearly 1100 hp on the dyno before they showed mercy and did a tear down.

They found out it was a little 4.8L.

transamtom

iTrader: (8)

I would just put here in and get a turbo or NO2 kit and have fun till it pops then go looking for a 6L or 6.2L. JMHO

skidder07

That's why I ask if it's a waste or not. I got the engine for free and use it for test fitting in my truck.

LETZRIDE

iTrader: (6)

put it in...everyone has 5.3s, 5.7s, and 6.0L - it was free and they can make power and it's different

madmike9396

iTrader: (29)

It will make the power you want to achieve.
That **** was free ???
Id slap some heads and cam on it and roll. It will be a peppy Lil motor

tfi racing

iTrader: (2)

Looks like I'm the idiot here,$3100 USD for the Trick Flow Top End Kit and $900 USD for a Fast intake at Summit,makes perfect sense to bolt those parts on a free 4.8,if the OP got those parts for free,please share with us how that happened,we all would like a set...

Orange Juice

iTrader: (3)

If you are going to spend $4000 on top end, cam and intake. I would spend the money for the cubic inches and do it once.

LETZRIDE

iTrader: (6)

why is it costing $4000 to pull 400hp out of an engine that already has 290hp to begin with? A set of headers, a well spec'd real aggressive cam and an intake with a solid tune should more than have you in that range

The 4.8L heads don't need to be touched for that hp goal at all. Aside from your supporting mods for your cam (valve springs etc.)

transamtom

iTrader: (8)

I would get a cam and springs leave the heads and intake stock and put the money into a good NO2 kit and spray the hell out of it.