robertbartsch

I am looking at the LS6 bare heads from SDPC that are ported and polished by Lingfelter. They are about $750 per copy and have the advantage of NOT being milled .055 like the fully assembled heads at $980 per copy.

Question: What valves should I use?

I thought the LS6 stock valves are lighter and longer than stock LS1 valves ...so I assume these should be my first choice. Are these available? Are there other better choices? The SDPC web page does not list LS6 stock valves as a choice.

I also assume if I use LS6 valves I also need to get shorter?? push rods. Is this true?

Ed Potter @ LPE

iTrader: (1)

I would recommend using stock '02 LS6 valves, the '02 versions are lighter, sodium filled units.
you should be able to call your local GM dealer for a part number. You shouldn't need shorter pushrods, as long as you don't mill off as much as the assembled heads get milled.
Ed

<small>[ December 20, 2002, 07:04 AM: Message edited by: Ed Potter @ LPE ]</small>

mobius

Ed
the assembled units and a cam such as the tr224, would that combo require a smaller pushrod than stock? also is there an 03 ported ls6 head coming out and will it be any different? lastly is there a limited supply of these ls6 cnc heads?

lpe stage 2 ls6 head flow numbers
I E
.200 158 123
.300 228 173
.400 278 204
.500 296 212
.550 314 218
.600 314 224

asa cnc ls6 heads by lpe
I E
.200 142 104
.300 210 150
.400 254 185
.500 290 203
.550 304 210
.600 286 212

Those asa heads sure look like a bargain if you keep your cam around a 560-570 lift max.

parts@sdpc

robertbartsch, we do have the GM valves in stock and sell them for about $15.50 each. The part number is 12563064 for the exhaust and 12563063 for the intake. You can do a search and find them on our site. They are not categorized at this time, but they are in the database. Thanks!

Nabbs

</font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by Ed Potter @ LPE:
<strong>Mobius -
These are actually SCCA heads, and yes, they are an excellent deal for the price. You are correct in that they are designed for cams that run around .550" lift.
They do require a shorter pushrod, we usually recommend a trend pushrod, which is a high quality aftermarket pushrod, they sell for about $150.00 a set.www.sdpc2000.com

hope this helps,

Ed</strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">Ed && SPDC,

I am in the process of putting together a package consisting of these specific heads. I've opted for the 02 LS6 cam, which provides the lift that you mention Ed. Do either of you have any experience with such a combo?

One final thing that is holding me up is I can't figure out the difference between 2 GM part #s...it seems that 02-04 LS1/6 head gaskets have a diff part # then their 98-01 counterparts, do either of you have any idea what the difference is (it does not say the earlier # is superceeded by the latter)? More importantly any idea which I should go with (I have a '99)?

Thanks!

-N

O6blues

SDPC posted technical info on this ----

https://ls1tech.com/ubb/ultimatebb.p...=006529#000000

This should answer all your questions.

Ed Potter @ LPE

iTrader: (1)

Mobius -
These are actually SCCA heads, and yes, they are an excellent deal for the price. You are correct in that they are designed for cams that run around .550" lift.
They do require a shorter pushrod, we usually recommend a trend pushrod, which is a high quality aftermarket pushrod, they sell for about $150.00 a set.

There are no new changes on 2003 ZO6, and there is no shortage of SCCA LS6 heads, we just shipped a pallet full of them.

Contact Scoggin-Dickey, I just spoke with them today and they are eagerly awaiting this latest shipment. They will take good care of you. Here is a link:

www.sdpc2000.com

hope this helps,
Ed

mobius

any guesses on power with a tr224 or a tr227/224 cam? also what about piston to valve clearance with either?

Nabbs

</font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by O6blues:
<strong>SDPC posted technical info on this ----

https://ls1tech.com/ubb/ultimatebb.p...=006529#000000

This should answer all your questions.</strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">Thanks, this helps quite a bit.

However I still want to be completely sure...when ordering 02 heads since they definately do not have the recessed area I should use part # 12498544 (02+ h/g)?

Thanks again,

-N

mobius

ED two more questions please, one is these heads with stock bottom end come out to about 11:1 correct? how well does that work for a daily driver with 93 octane fuel? second is the valves are by .6mm i believe since i want to run a 560-570 lift on a xe lobe i need stronger valves will the ls1 size valves work or will i need to specify the 02 ls6 heads to get the correct springs?
thanks

Ed Potter @ LPE

iTrader: (1)

Sorry Mobius, I have absolutely no experience with tr cams, maybe another member has some info on that setup.
Nabbs - yes, pn #12498544 for left, and right side is the gasket to use for '02 LS6 castings.
You should be able to get everything you need at Scoggin-Dickey. 1 stop shopping is always nice!

Ed

Nabbs

</font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by Ed Potter @ LPE:
<strong>Sorry Mobius, I have absolutely no experience with tr cams, maybe another member has some info on that setup.
Nabbs - yes, pn #12498544 for left, and right side is the gasket to use for '02 LS6 castings.
You should be able to get everything you need at Scoggin-Dickey. 1 stop shopping is always nice!

Ed</strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">Thanks Ed!

It's too bad LPE does not offer a drop in combo with these heads <hint hint> <img border="0" title="" alt="[Wink]" src="gr_images/icons/wink.gif" />

Do you have any experience with either an 02 LS6 Cam or your LPE cam with these CNC heads?

Thanks again,

-N

PS - I have some questions that I'd like to ask you off line...will drop you an email.

Ed Potter @ LPE

iTrader: (1)

Mobius - you are correct, these heads, when bolted on a stock bottom end, will yield between 11.1-11.3:1 compression. That is pretty aggresive, and right on the edge of detonation. Good fuel is definately a requirement. In a non-LS6 equipped vehicle, you will need additional spark tuning.

Nabbs- That's a pretty good idea, I will run it past Scoggin-Dickey, since they have evrything under one roof, it would be easy for them to make a "package" deal.

either one of those cams would be a good choice,feel free to contact me anytime.

Ed

Gary Z

The above post by parts@sdpc supposedly gives part numbers for the '02 lightweight LS6 valves and says they sell for $15.50 each. I think that the reason the price is that low is that the part numbers are incorrect. The GMPP web site gives 12565311 and 12565312 for intake and exhaust valves respectively. I searched the SDPC web site and found the following:

INTAKE VALVE, 2002 LS6 HOLLOW STEM
Price: $40.00
Part # 12565311

EXHAUST VALVE, 2002 LS6 SODIUM FILLED
Price: $40.00
Part # 12565312

VALVE
Price: $15.30
Part # 12563063

There was no description other than "Valve" with the last part number. Perhaps someone at SDPC can respond with a clarification.

-Gary

<small>[ December 26, 2002, 06:55 PM: Message edited by: Gary Z ]</small>

robertbartsch

I received a direct e-mail from SDPC that said the 2003 LS6 valves were $12.50 each.