my question was would ls2 stock heads go on a 2000 ls1,,, and if there would be much gain,,, but now i know that they are ls1 heads.. and am trying to find cheep head work

 

LS2 heads are actually LS6 heads. (243 castings)

They'll bolt right on and work just fine. No need for a special intake, but the 2001/later manifold is definitely preferable.

 

Swwweeeeetttttt!!!!!!!!!!!!! any one know how much more they flow over stock ls1 heads???

 

Other than a bit of compression, and a little more port volume, there's not much difference. If you're considering a head/cam change, go with the matched head/cam package from the same manufacturer. Decide if you want to maximize torque for the street (idle-5000 rpm) or HP for the track. Then get them to recommend a package and send you a dyno run from a similar vehicle they installed their package on.

As a data point, most people are awed by high HP numbers, when it's torque that you notice most in daily drivers. Most first timers make the mistake of picking a large cam that ultimately idles high, bucks and farts at low rpm, and generally drives poorly in town. You need to concentrate on this: Do you want a daily driver or a race car? Answer this honestly, and you'll be pleased with the result. How much time do you really spend on the dyno?

Casting Number 853 or 241
LS1 (Centre Bolt)
99-00 5.7L Passenger Car and Corvette (853)
01+ 5.7L Passenger Car and Corvette (241)
Material: Aluminium
Compression Ratio: 10.1:1
Combustion Chamber Volume: 66.67cc
Intake Port Volume: 200cc
Exhaust Port Volume: 70cc
LS1 has round exhaust ports
Intake Valve Diameter: 2.00 inches
Exhaust Valve Diameter: 1.55 inches

Casting Number 243
LS6
01+ 5.7L Corvette
Material: Aluminium
Compression Ratio: 10.5:1
Combustion Chamber Volume: 64.45cc
Intake Port Volume: 210cc
Exhaust Port Volume: 75cc
LS6 heads have D shaped exhaust ports
Intake Valve Diameter: 2.00 inches
Exhaust Valve Diameter: 1.55 inches

 

Excellent advice.

 

well it seems like there was a mix up ,, turns out that they are ls1 heads... but for 85bucks i couldnt turn them down,, i figure porting polishing springs rockers ya know all tha good stuff,, then ill put them on with a mild cam seeing as my car is a daily driver,,,, any suggestions,,, o yeah and then ill sell my heads

 

Are you going to do the porting, polishing, etc., or is it going to be a CNC professional job with documented results? And who is matching the springs and rockers to the cam? There's a neat saying in the computer world: 'Garbage in = Garbage out'. Repeatable, documented results are worth every penny they cost. Even if your labour is free, poor or the wrong parts aren't worth the effort.

 

well hell ,,, thats a good question... havent thought about that yet... i just know i bought heads for 85 bucks.... and that i am going to get them ported polished and fited with new springs rockers and retainers..... yalll know of a good place??

 

Do some searching. Find a place that will give you some decent money for your cores as trade-in on a set of CNC heads. That way you'll get a quality product and take good advantage of the bargain price on the heads you have.

 

cool .. there is a shop down here that only works on vettes and vipers,,, period... i got some friends that work there, im gonna call them monday and see what they say.l.. they always shoot me straight.. but any info is welll apreciated!!!!!!

 

cracker Bear,

We do head porting in house. What's the head casting number?
Shoot me a PM if you are interested.

Max

 

wow!!!! had no idea how much it cost to get these heads ported polished and set up... man,, ive been told every thing from $1999 to $1799.. holy jeez.. any one want to do it for fun or the experience,, or maybee you got some bad *** heads and you want to trade for stock heads... just throwing it out there

 

They are 2001 243 LS6 actualy. Solid ex, and it is sugested you go with an LS6 intake while you are at it. CAMS... many choices depends on how you drive, and what you consider streetable.


OOps just read down and saw they where 241s, ummm good price but they would cost you a ton to get worked over well and ported. Lots of 243s out there with some CnC work that don't cost a ton and give a great bump in performance.

It's all in the tune down low. A good tuner will make it as tame as you want. A great one will give you the idle you want (tame or drag car) and the response in the middle with the top end hit. Good luck man!!!
Dave
PS or keep the LS1 heads, and put a blower on it

 

That isn't too bad if they are a reputable shop and you are getting a good product. If you take a look at the high end shops they charge over $2k for their heads. So if you are getting that type of flow then the prices are fine.


If not, then you may as well buy the cnc ported ls6 heads from the other vendors. They flow just fine and will work perfectly in all but the highest hp applications. Mine are the GMPP heads and I am more than happy with the performance of the vehicle.

Chris

 

I am ruinning the same heads, LPE/GMPP CnC LS6 heads, milled 55... love em and nice price too
Dave