2gofast

iTrader: (1)

I am thinking about the stage 3 LS 6 heads from Livernois and am concerned that the intake volume will be too big (relative to a stage 1 or 2) to support low rpm torque/throttle response. I don't want a dog down low just to get the higher flow volume up top. I am a street cruiser not a drag racer.

I have an LG G5X3 112 LSA cam.

I also have 4.10 gears and LTs on my 2004 C5 coupe.

Here is a link to the heads:
http://www.livernoismotorsports.com/...t.phtml?p=1352

I think the website incorrectly states the intake volume. Let's assume the correct volume is 240cc. - what are your thoughts.



The heads would be milled to 59-60cc and the pistons will be notched. I would be using a cometic 0.040 gasket.

Would this combo give me good throttle response and low rpm torque or would the flow velocity be too low (again relative to a stage 1 or 2 LS6 head).

Thanks in advance for your thoughts.

2GOFAST

teke184

iTrader: (5)

specs for those lazy folks

New GM LS2/LS6 243 casting
5 axis CNC machined
Fully assembled
220cc Intake Runner
Intake Flow Rate 310 CFM
Exhaust Flow Rate 245 CFM
Stainless 2.020 Intake Valves
Stainless 1.575 Exhaust Valves
Livernois dual coil valve springs good to ~ .690 lift
Manley titanium retainers


220cc is not too big...get the compression up and you should be fine

but looking at the other stages...they are all 220cc...so i guess i'm not sure what you're worried about.

alot of the very popular heads are 215-225cc runners

ss1

iTrader: (32)

I thought Livernois stage 3's are 240cc???

Edit: I just found a sale post from last year and it says they are 240cc. I noticed their website has changed, now it says they're 220cc. Maybe something was mixed up when it was re-done.

2gofast

iTrader: (1)

Thanks for the comments. I spoke with Livernois and they have a new cnc program and the new volume is 220cc.

However, the used set I am looking at is 240 cc.

SO - let's assume they are 240cc - it this too big for the cam and my intentions.

quiet_storm98

iTrader: (48)

they are 220cc's..they had a typo on their site. I have a set that i will be installing in a few weeks

cdubbzz

iTrader: (11)

I thought the valves on the older Stage III's were 2.08/1.575

Anyway I have them on a 395ci stroker with a smaller duration cam 231/238 .610/.620 112 LSA and the car makes a decent amount of power throughout. It's not gonna pull to 7k but I'm more of a road warrior than track addict.

Red was effed up tune
Blue was fixed tune but before Mamo-ported FAST, lightweight Yella Terras, & FTRA/85mm lid

Dyno
http://rides.webshots.com/photo/2593...rK?vhost=rides

98RedZone

iTrader: (1)

I think with 4:10 gears in a C5 you can stand to lose a little down low. The small 59cc chamber heads will boost your DCR.

edit: sometimes the higher "stages" are just valvetrain upgrades

ChrisH821

I want to say the stage III Race heads are 240cc.. Im about to get some stage IIIs myself I think. Also the race heads have larger valves, 2.10 and 1.60.. I think, correct me if I'm wrong though, I may well be.

AU N EGL

those numbers are incredible

stage IIIR
240cc Intake Runner
Intake Flow Rate 332 CFM
Exhaust Flow Rate 230 CFM (265 CFM w/ 1 3/4" Pipe)
Stainless 2.100 Intake Valves
Stainless 1.575 Exhaust Valves

ss1

iTrader: (32)

I'm nearly 100% sure the Stage 3's were previosly listed at 240cc. I pm'd one of the guys from Livernois about them a couple of times asking about that particular head. My concern was the runner size vs. valve size, I figured the Stage 3 would have at least a 2.055" valve.

1slow98Z28

iTrader: (3)

youll have to probly fly cut... i was wonderin g on the same thing you are i know their heads love single pattern cam havent heard to much bout anything eles..

LivernoisMotorsports

iTrader: (1)

OK, I will post some history about our stage 3 heads for the last 2-3 years...

Stage 3 heads were always 220cc +/-
stage 3 heads always came standard w/ 2.02/1.575 manley valves

Stage 3 race heads were always 240cc +/- and started out as a 2.08/1.575 Manley valve but then got bumped to 2.100 VERY shortly after releasing them.

Now stating this, I will follow up with some other bits of info:

When the new website was just in its beginning stages some bits of info got messed up on the old site. This project started 6+ months ago, and it is still being finished up now. During the time of them working on the new site (and before its launch) we were informed not to touch ANYTHING on the old site, meaning ANY typo's/prices/features/anything could be updated.

Now that the new site is up we can start addressing those things. I hope this clears up some misconceptions about all of our heads. If there are any other questions about them PLEASE, do not hesitate to call us, or PM us.

Thanks,
Andy@Livernois

ss1

iTrader: (32)

Ok, sorry for giving out any incorrect information. But, just to prove i'm not an a-hole, I got my info from chad via PM a while ago. Here is a link to a thread about the heads as well.

https://ls1tech.com/forums/showthrea...952&highlight=

Btw, the site is coming along nicely.

LivernoisMotorsports

iTrader: (1)

lol, I definately didn't think anyone was being that way. I realize there was some mis-information about the product, so I just wanted to clarify.

Their listing to be a 240cc was the number one comment we got while the site was being designed, especially when we would recommend a stage 3 head to a stock shortblock LS1 guy

I am certain this will not be the last time this topic comes up, as alot of people probably thought it was a 240cc runner. in fact, come to think about it, I may make a thread dedicated to the "fixing" of this specification.