LS1 Build Questions

[noonzor]

Originally Posted by Super73

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.

....so what your saying is....? haha sorry im just not sure im understanding. i drank a lot of beer last nite my brain may just not be computing properly today sorry. im not totally interested in nitrous, if im going power-adder itll be some sort of forced induction system only.

[swb85]

He's saying that for a non FI application you want the bigger bore to unshroud the valves and aid cylinder fill. The 5.3/5.7 LS motors both have smaller than 4" bores while 6.0/6.2 motors have bores of 4" and 4.06" respectively.

[1FAST68]

I would do a 6.0L, I got a 6.0L rebuilt it back with arp rod and head bolts, used a set of L92 heads and a comp cam. Runs on pump gas and went 11.80's -12.00 in my 68 truck.

[noonzor]

ahh ok i see i see, yeah i didnt now that but i was looking more towards the 6.0L, originally because its a 6.0 and not a 5.3, but that info helps!! thanks for the tips guys i really appreciate it.

[Super73]

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..

[Alex1]

Originally Posted by noonzor

any pics of the set-up so far?

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

[noonzor]

Originally Posted by Alex1

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

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

[Alex1]

Originally Posted by noonzor

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

Not yet! LOL. Once I REALLY start putting stuff together I'll set something up.

Billet impeller turbos are pricey - certainly if you need to buy two ! LOL

[noonzor]

haha i bet, nice lookin pipes man! do them yourself or sourced out?

[Alex1]

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.

[Wild83C10]

Originally Posted by Alex1

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.

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.

[Alex1]

Originally Posted by Wild83C10

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.

I had a BW S480 with race cover - ended up selling it because for my 468 it's not optimum. I'm looking at the Precision turbos 72 -76mm with billet impellers, or a single 94-106mm with billet impeller. The billet impellers make more power, there a bit more agressive and have newer technology.

I think the 2" SS was $15 or so a J bend. Flanges were expensive and the colletors were as well

I'm looking to make 800rwhp.

[Shon]

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!!

[noonzor]

Originally Posted by Shon

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!!

sweeeeet, thanks man!!!!

[noonzor]

Originally Posted by Super73

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..

still know where that motor resides by chance?