If so did you have to upgrade the computer aswell?And how was is it?Was it 400+hp like the comercials say?Has anyone had one the dyno?I am thinking about doing this so some help would be great.

 

talking about switching out your ls1 motor for a ls6, sorry but that would be pointless. Only big differences betweent the two is heads and a cam, you could do a heads and cam swap on your current engine for 1/4 of the price and make A LOT more power then a ls6 would stock.

 

And the oil pump from an LS1 to an LS6 are slightly different too, what about injector size? Probably the same though...

 

there are significantly better heads/cam setups out there than the LS6 conversion.

probably cheaper and yield more power.

if you want 400rwhp....get some ported heads (either 5.7Ls or 5.3Ls) and a TR224 cam. with all the bolt ons, and a good tune...400rwhp will be pretty easy.

 

Not really worth it to swap a complete ls6 in.. heh

 

I was talking about the head,cam&intake swap not a whole engine,do you have to do a computer upgrade when you do this?

 

no, ls1 pcm will work with it, may need some tuning if you go with a drastically differant injector, or cam.

 

I have been eyeballing the same kit(s) from Summit. $1800 for the head / cam and gasket kit seems very reasonable. I was under the impression that a tune wasn't required but I can't imagine that being right after adding 80 horsepower. However, the air and fuel components are all still the same.

 

I've seen it done, albeit, only the longblock.

I met someone at the track that had taken out a perfectly running ls1, used a ls6 as a base, heads, cam, intake, throttle body, long tubes and true duals. With a built suspension, 4.10 gears on a 12 bolt and street tires he was trapping low 11's spinning the tires the whole way (it had drizzled a little rain during his line up).

He was told to get off the track due to not having a roll cage, but if you could imagine building up a f-body with everything you could think of short of 402, 427 or turbo. Keep a VERY stock appearance (save for looking underneath and seeing all the red from having every concivable suspension mod). You'd have this guy's car. A daily driven 500HP sleeper.

I think on this day I was committed to getting myself a ls1 car.

 

I was also thinking of getting an LS6 kit.... But every time its mentioned everyone says no. What about the LS1 factory heads? Would it be worth the price on a budget to buy some used heads (what year?) and get them ported and maybe a valve job. What HP gains could that yeild?

 

If they are getting ported, all factory castings are the same. Most do not know this.


If you're just looking for "LS6" power, then it's as simple as a cam swap only. Full bolt-ons with nearly any mild cam will yield more power. If you did the work yourself, you could actually install some cnc stock heads and a cam for $1800.

Ben T.

 

So it doesnt matter from year to year if you switch from center bolts to perimeter? plus if a good port/polish valve job makes an extra 15-20 hp i'd think its worth it.

 

The LS6 cam has a smaller base circle so you WILL need longer PR's. Hope the kit comes with them too.

TSP has some CNC ported LS6 heads fully assembled w/ LS6 springs for ~$900. You can get any cam in a kit for $600. Keep it in the .550 lift range and you won't need to change springs or anything else. I'd still change pushrods though.
$1500 and more power. Sounds like a better deal than $1800 from summit to me. You can get LS6 cams CHEAP!!! I'm talking $50-$150.

Or get a head/cam kit:
Precision Race Components 5.3L Stage 1.5 Cylinder Heads Fully CNC Ported & Assembled With 2.04" Intake Valves, 1.55" Exhaust Valves, & PRC Platiunum Springs. Kit Also Includes Hardened Pushrods & Your Choice Of Camshaft.

So no, the $1800 for the LS6 stuff doesn't seem that good.

 

I'd agree with that logic.

I bought a .559/.559 lift cam and planned to use it with LS6 springs, but the more I read I've decided to go with comp 918 springs. You can get by with LS6 springs as they won't near their max lift potential, but they will not have adequate pressure to keep the valves from floating at higher RPM.

So, add in a set of springs & don't forget gaskets and head bolts.

Ben T.

 

I concur with the general theme here. You can buy a decent set of ported heads with all the springs and stuff necessary to run a good cam, a set of chromemoly pushrods, and a cam from a dozen different places that will get you 450 or higher crank hp for the same $1800 or less.

I'm running just a set of ported stage 1 LS1 heads with stock size valves and good double springs, cam, and all of the bolt-ons. Haven't dynoed but the mph to hp calculators say that it takes well over 400 hp at the wheels to pull 118 traps.