I have got some feedback regarding my new set of LS6 heads:

So far after some welding and a 2.08 valve, the intake looks like it will flowing 350 @ .650 lift and 361 @ .700 - this was on a flowbench @ 24"...Valley Head Service is taking their time but the numbers seem to make it worth the wait.

Needless to say I a m very impressed... the stock LS6 intake port flowed 230 and change before any porting took place.

The rework on the exhaust port should be completed shortly. and I'll be posting soon.

Looks like I'll be looking for a higher stall converter very soon too.

Richard

 

350 @ .650, definatly not too shabby. <img border="0" title="" alt="[Smile]" src="gr_stretch.gif" /> i assume it was flowing just as good down in the .5-.6 range?

 

Damn nice numbers!

I could almost take advantage of those .650 lift numbers with the cam thats going in the 422. <img border="0" title="" alt="[Big Grin]" src="gr_grin.gif" />

What cam are you going to run with those heads and are you going to up the stall?(maybe too 4400 <img border="0" title="" alt="[Wink]" src="gr_images/icons/wink.gif" /> <img border="0" title="" alt="[Big Grin]" src="gr_grin.gif" /> )

Your truck is going to haul ***.

-------------------- <img border="0" alt="[Truck]" title="" src="graemlins/gr_truck.gif" />
--------- <img border="0" alt="[Corvette]" title="" src="graemlins/corvette.gif" />

John

 

One other thing.

Are you going to switch over to the LS6 intake manifold?

It looks like it would be quite a bit of work to do but the LS6 intake still flows better than the truck manifold from the info I've seen and heard.

John

 

Hi guys I'm new here to this site and was cruising around when I saw this post. As I'm in the LS1 cylinder head biz too I'm really impressed with such seriously high flow numbers from LS6 heads <img border="0" title="" alt="[Roll Eyes]" src="images/icons/rolleyes.gif" />

I would strongly suggest getting a second opinion on their flow when you get the finished heads. If they really do flow those numbers at those lifts then you are gonna rock!!!! <img border="0" alt="[cheers]" title="" src="graemlins/gr_cheers.gif" /> <img border="0" alt="[hail]" title="" src="graemlins/gr_hail.gif" />

 

A stock Z06 head flowed 230cfm? @ how many inches of vacumn? Heck, I've never seen a set over 270 stock.. Not flaming you but those numbers look a little odd from my experiance.

Dennis <img border="0" title="" alt="[Eek!]" src="gr_eek2.gif" />

 

The LS6 heads are at a reputable head porting shop VHS (Valley Head Service.) So far as I can tell the work Larry has done has been nothing less than impecable...welding and reshaping, the works...he has many hours in these and it shows. I'm going to get the final numbers for the exhaust soon but, as with any large monitary investment they will flowed by another shop to verify numbers.

Dennis:

</font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif"> A stock Z06 head flowed 230cfm? @ how many inches of vacumn? Heck, I've never seen a set over 270 stock.. Not flaming you but those numbers look a little odd from my experiance.</font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">Since 230cfm < 270cfm I don't understand your question.

Richard

 

Richard,
Something smells fishy <img border="0" title="" alt="[Confused]" src="images/icons/confused.gif" />
Please double check the cfm vs test pressure and repost your results.
340+ cfm from a 2.08" dia. valve is rare at .700" lift let alone 360cfm. Makes no difference what size test bore at this point.
Anything over 300cfm @28" at .650" lift would be nice numbers to see. Anything over that is a pure bonus <img border="0" alt="[judgement]" title="" src="graemlins/gr_judge.gif" /> No matter what, you still are going to need to get it through the intake manifolds that are available.
I'm rootin' for ya! <img border="0" title="" alt="[Big Grin]" src="gr_grin.gif" />

Richard

 

Nice numbers.

Headbam:

Do you work for MMS? I see that your from Reseda.

 

Jantzer98SS

"Headbam:

Do you work for MMS? I see that your from Reseda. "

No I do not work for MMS. Their shop is just down the block from mine. I can hear some of the louder cars run on the dyno. Pretty cool <img border="0" title="" alt="[Big Grin]" src="gr_grin.gif" />
It sometime sounds like a drag car coming down the street!!!!
I own the machine shop West Coast Cylinder Heads.

Richard <img border="0" title="" alt="[Cool]" src="gr_images/icons/cool.gif" />