I�m building a 67 camaro don�t want to boost it. Looking for close to 500whp I k ow that�s hard NA. So I have a lq4 currently I was going to build. But adding up parts I�m wondering if I should get a ls3 or a l92 instead and ditch the 6.0. Since Im Going to want to do a cane swap anyway and id need a ls6 or ls3 intake. What are your thoughts. I k ow ported 243 heads would work in the lq4 but I. Looking to get my compression up to 10-5 10-7 range. Thanks

 

Ls3 would be cake, but your 6.0 could do it too. CR should be low 11s not mid 10s. Put the money into the heads and intake.

 

You need to provide more information to get a solid answer here. A built LQ4 could make 500 wheel but I'm not sure that's the best way to get there.

What's the budget?

What's the usage?

What's your tolerance for driveability issues?

Details on the balance of the drivetrain, auto or manual?

What parts do you already have that you are definitely going to use?

 

i have a 4l80 it�s going in a 67 camaro I do t want boost. I�m really considering selling the lq4 I bought for a L92 aluminum engine or a LS3. In not racing the car just want to make decent power to back tires and have a nasty sounding cam.

 

LS3 or L92 is a much better starting point. Should be easy to make your number with a 6.2l. Also the aluminum block is about 100lbs lighter.

 

LS3 block re-sleeved to 4.185 bore, 4.00 inch crank "all forged internals". I suppose you could run the LS3 heads but a set of aftermarket LS7's would make more power.

 

he said 500, not 700

 

yeah. I definitely don�t need that crazy power. I really dint need 500 whp either but want to get as close as I can. I was considering changing pistons in my lq4 and running 243 ported or l92 ported but I was told l92 won�t make good power in 6.0

 

If your 6.0 has gen 4 rods

get a set of lq9/Ls2/l76 pistons (Flat top)
823/821 heads/ Ls3 intake
any stage 3 ls3 cam, and a set of longtubes.
You should be over 450rwhp with good tune even through the 4l80, without breaking the bank.

 

what compression would I be at with for tops and 823 heads?? Can I just swap pistons? My lq4 is a 05

 

I believe around 10.4:1 unmilled

and yes pistons will be a direct replacement, I�ve done it several times, Gen 4 rods are floating so you won�t have to worry with having the pistons pressed off. If the engine is clean I just reuse the rings but keep them with the same cylinder they came out of.

another option but would cost considerably more would be to use 6.2 pistons and bore the block to 4.065. But for the cost it wouldnt be worth the extra 15or so hp

 

and you think ls3 heads will produce more power then ported 243. I�ve seen some dyno numbers and they seemed low on lq9 l92 head swaps

 

Yes LS3 heads make more power than 243's

 

Go ahead and put the 243's on the LS3 block. It will work and its being cheap as you probably already have the heads and intake for cathedral stuff.

 

i have a 6.0 not. 6.2

 

Yeah you mentioned going LS3 and I got carried away with possibilities..I've got over 5G invested in my LQ9/L92/LS3 build and it would be a disappointment to not see 500rwhp NA through a Powerglide and a soon to be replaced 10 bolt, Really won't matter though because there's those little things we like to call power adders.

 

Like tornados?

 

Bore that 6.0 and give her some stroke, my 408 made 615 at the crank.

 

dont forget the Ls3 factory intake is comparable to say a FAST 102 cathedral Intake, so that alone makes up for the difference in the cost of the heads.

 

My son keeps saying that I need to put a turbo kit on it and he's probably right but its starting out as an NA car on the bottle. If I was to turbocharge anything it would be the 01 since it has an LSX with 6 bolt heads but I've always liked the idea of having a Magnuson TVS2300 under the hood.