Big numbers on SDPC ported heads
01-27-2003, 10:59 AM
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Big numbers on SDPC ported heads Has anyone been making big numbers with the new ported LS6 heads from SDPC (part No. 88958622)?
..These are the ones that are ported new by Lingfelter and milled .055 inch to bring the combustion chammer back down to 60CCs. Price is $980 per.
What size push rods are being used; what about the pins in the intake - do they need to be shaved/replaced?
Does this set-up runn well on pump gas?
..These are the ones that are ported new by Lingfelter and milled .055 inch to bring the combustion chammer back down to 60CCs. Price is $980 per.
What size push rods are being used; what about the pins in the intake - do they need to be shaved/replaced?
Does this set-up runn well on pump gas?
03-21-2003, 09:16 AM
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Re: Big numbers on SDPC ported heads </font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by robertbartsch:
<strong>
What size push rods are being used; what about the pins in the intake - do they need to be shaved/replaced?
</strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">push rod: 7.40 - 0.055 = 7.35
<strong>
What size push rods are being used; what about the pins in the intake - do they need to be shaved/replaced?
</strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">push rod: 7.40 - 0.055 = 7.35
03-22-2003, 12:43 AM
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Re: Big numbers on SDPC ported heads I think I read somewhere that these heads have around 250cc intake ports? This seems like it is "hogged out" and would not carry much port velocity in comparison to other LS6 heads.
Does anyone have numbers to back this size up or dyno numbers of an engine that uses these heads. What cam also if you could find it?
Thanks for you your time, <img border="0" alt="[cheers]" title="" src="graemlins/gr_cheers.gif" />
Ryan
Does anyone have numbers to back this size up or dyno numbers of an engine that uses these heads. What cam also if you could find it?
Thanks for you your time, <img border="0" alt="[cheers]" title="" src="graemlins/gr_cheers.gif" />
Ryan
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03-23-2003, 01:13 AM
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Re: Big numbers on SDPC ported heads Thoes heads were design around a cam not the cam designed around the head. They were ment to be used with a cam of around .525 inches of lift
<img border="0" title="" alt="[Wink]" src="gr_images/icons/wink.gif" />
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03-24-2003, 09:54 AM
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Re: Big numbers on SDPC ported heads I have yet to see one of these heads close up, but i know GM and Lingenfelter know what works with these castings so i think it would be interesting to see how they run with that cam or even with more popular grinds. The 250cc doesnt have to mean lazy performance if most of increase in port size is "properly placed". Im open minded to possible advantage to this port program. Any input or actual results would be helpful.
03-24-2003, 10:00 AM
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Re: Big numbers on SDPC ported heads These heads do seems to be aimed more towards low lift performance. They peak on the flow bench right around 550 lift, and fall off very quickly after that.