Originally Posted by Super73 (Post 3496337)

I can't say I have seen too many 400+rwhp 5.3/80E/12bolt NA setups. My little alum 5.7 was making 428rwhp through an 80E/12bolt with a factory LS6 intake and stock ported TB. The bore on a 5.3 kills them NA. That's also the killer for the 5.7 vs a 6.0 or even 6.2.

The larger bore allows some unshrowding of the intake valve allowing better flow. Look at any head that has flow data for both a 3.9 and 4.0 bore and you'll see the numbers go up quite a bit. The larger bore is always going to be easier to make power with if staying NA.

If I was building a NA motor or even N20 motor for a 200-250hit, from scratch on a semi budget, I'd go find a LS3 block, shove a set of diamond pistons in it with the factory crank. Pick up a set of used ported heads and spec a cam based on that. Sure you might be in the longblock at about $3,500-4,000 but you'll also be 70lbs lighter and where better can you have it than right over the front end. You'll also be ableto hit it hard with a 250 hit.

Lack of weight over the front makes large differences when trying to make something work.

Originally Posted by noonzor (Post 3495154)

any pics of the set-up so far?

Originally Posted by Alex1 (Post 3498024)

I may have some pics of the pipes, but right now I'm working on cleaning up the truck.

Originally Posted by noonzor (Post 3498161)

awesome, you got a build thread for it by chance?

Originally Posted by Alex1 (Post 3498211)

We started to build mild steel ones and then I broke down and bought some 304ss and sourced it out to a guy in the States. I paid like $400.00 to weld 'em up. Pipes, flanges and collectors were like 600 or so and the V bands were a couple hundred bux.

I've got 4340 crank rods, block, dart heads solid roller etc. waiting ,but it's time for the body work to start.

Originally Posted by Wild83C10 (Post 3499143)

Wow, those headers are pricy. But that is the going price for SS turbo headers. Did you check our Stainless Works?

What turbos are you running? Why billet?

Good old BW turbo will do the trick. Mine was $400.

Originally Posted by Shon (Post 3499783)

I love the LS based series of engines. Let me know what you need, I can get most anything you need or point you in the right direction.
I use Advanced Induction for CNC heads and custom cams and I carry a full line of Comp Cams/etc.
It may not be on my website but I can get it!!

Originally Posted by Super73 (Post 3497207)

I also know where there is a 408 stroker Iron block for sale. Ported heads, 9.5-1 cr and ready for boost. Comes with almost everything to be turn key.. I was originally thinking of selling my motor and going with it, but decided against it..