</font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">
Don't forget about spring bind as well. With the extra lift you may run into a problem.
</font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">Really spring bind can be a problem at .660 lift? <img border="0" title="" alt="[Smile]" src="gr_stretch.gif" />

 

Good luck Terry! This setup should prove interesting!!

 

</font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by strife:
<strong>are 01 LS6 heads more expensive than 02 LS6 heads because of supply or is it just some crazy **** gm stuff ?

12560801 LS6 2001 $685.50
12564825 LS6 2002 $579.50</strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">It is a long story! In short there are very minor differences. Fit/form/function are the same, nothing to make any difference. Anticipated production use of '01 head determined the price. It was determined that the '02 head would also be used for the '03 model -- more production less cost in a nutshell.

 

</font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Really spring bind can be a problem at .660 lift? </font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">Dunno, but I definitely wouldn't want to forget to find out if it was. .660 lift is quite a bit. You can get that info from the manufacturer of the springs you will be using.

<small>[ June 15, 2002, 02:43 AM: Message edited by: Wide Open Throttle ]</small>

 

Terry, you will need extra valve length for 2.00" valve installed height, those heads are not cut spring pockets deeper friendly. This will change your pedestal height for geometry and will cause interference with valve covers(on all but race covers)Jesel rocker system should be used. As for 13 to 1 compression with welded up chambers, if you plan on using big flow valves, you wont be able to"fill in " very much of chamber without hurting flow around valves.I am assuming your not using much of a dome on piston of coarse.Large displacement will give you adequate compression with mildly milled LS6 head, 58cc? Good luck with this just remember price of finished product reflects on how impressive it is IMO.

 

</font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">
Terry, you will need extra valve length for 2.00" valve installed height, those heads are not cut spring pockets deeper friendly. This will change your pedestal height for geometry and will cause interference with valve covers(on all but race covers)Jesel rocker system should be used.
</font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">I'm not too hip on the valve train geometry, but the valves I am using are longer than stock. I'm planning on using adjustable shaft mount rockers + shims + longer/shorter pushrods to dial the geometry in. I'm going to let MMS do all that. Also I will be using valve cover spacers to move them up a bit.

</font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">
As for 13 to 1 compression with welded up chambers, if you plan on using big flow valves, you wont be able to"fill in " very much of chamber without hurting flow around valves.
</font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">I'm using stock pistons with ~1-2cc removed (notched). I went with the LS6 cores because I only need to weld in 4cc to get to the CR ratio I want. I'm confident we can get the 4cc in and have good valve shrouding.

</font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">
Good luck with this just remember price of finished product reflects on how impressive it is IMO
</font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">I agree. My total budget for the ported heads with titanium valves, shaft mount rockers, outright, is ~$4500. Much more money than my Stage2x LS1 heads (~$1850), but on par with what MTI et. al. charge for regular LS6 heads outright wo/ shaft rockers and titanium valves. I'm going to sell my current heads/cam to help offset the cost.