I just bought my first ever project witch is a gen 3 5300 vortec (lm7) and i dont know where to start with it my goals would be to reach 500 to 600 horsepower with a carb unless someone could help me with fuel injection anyway would love to hear some feed back and to know if this is even possible

 

Turbo or supercharger if you really want to make that power with a 5.3 displacment.

Build a bigger engine out of it if you want to get that high NA.

 

Whats the most power you think i could do naturally aspirated with it and is there forged internals for the 5.3? Could i bore the engine out?

 

Yeah you could bore it out, you could make it like a 370+ or something if you wanted too.

The stock bottom end on a LM7 should be alright for a little over 500hp before the connecting rods will become a factor.

So many factor come into play with NA power on a 5.3, all comes down to what parts you use. Like how big of a cam, cylinder heads, injectors, intake manifold, headers and the tune. Also where you live and fuel quality.

Just a guess on power with a LM7 with a decent cam, cylinder head work, headers, tune etc etc could be around 400 crank hp. Again there are just a lot of factors. The sure fire way to 500hp is a boosted setup.

 

I live in northern ontario canada and could you help me out with this im very new to the aftermarket scene and dont know where to shop and what to get and if i would go into forced induction i would go turbo so ill aim for a turbo build thats fairly reliable

 

All comes down to your budget really. Best reliable bet would be a trick turbo kit. They could hook you up with all you need, get ahold of Stock48 (Jarrett) for a cam. pm me if you want this info

Do you plan on running pump gas or e85?

 

I would love to run e85 just dont know where to get it

 

do a mild rebuild with a cam and a turbo kit. Keep to 93 pump gas if you dont know where e85 is locally to you.

I think you should do the engine build, send heads to machine shop for 5thou mill, head gaskets, lifters.... the usual. Get the truck running first.

Then look into turbo or blower.

Stick to EFI. Some 60 lbers and a walbro pump would be perfect for your goals.

 

If i stick to efi i would need a new wireing harness this one is scrap probably why the engine was so cheep where could i get a new harness and what does the harness need like do i need the harness thats in the cab?

 

if u dont wanna send it to a shop i would swap some 4.8 flat top pistons in there a 220 cam, 918 springs,and a 3k stall and of course intake long tubes and tune and you will be more then surprised.

prob cheapest and its a proven combo.

BUTTTTTT if u want to go crazy take it apart send to a shop bore it out and do the same steps ^ but with parts that fit and make more POWAAAAA