Jon@Texas-Speed

iTrader: (18)

After nearly a year of development we're finally to the point where I can show you guys our newest LS based PRC castings! This all new casting is the PRC LS3 cylinder head & will be available in MANY different configurations ranging from LS1 friendly LS3 heads all the way up to large cube LS3 stroker applications! We don't have flow data or anything like this at this time, this is simply a post to let you guys checkout the progress & know we're working hard to make these cylinder heads a reality. The new changes to our castings will allow many new features on both the LS3 head & the cathedral LS heads! Keep your eyes open & we'll keep you guys updated on progress!





Enjoy!

4U2NV-SS

iTrader: (21)

Question now is should someone wait on building there LS3 418 with the your standard LS3 CNC heads or wait for these to be released????

Beaflag VonRathburg

iTrader: (176)

I like that you guys are putting out new products. I look forward to hearing more about them. Do you care to share what all you have planned for them? Runner, chamber, valve sizes? Minimum bore per setup? Are these a modification / retool of the current cathedral port options or a completely different casting?

BlownVette 2001

iTrader: (2)

TransWS6Am

iTrader: (41)

exactly, im in the middle of a 418 build and im not sure if i wanna take the heads to get ported or wait these out, wish there was a better time frame of when these will be out.

3.8redbird

iTrader: (3)

Ill wait for numbers. Trickflows or these. whichever is out when I have the money for heads gets my business

supermouse4

Man, those look like amazing castings.

I'm patiently waiting for more specs and flow numbers.

PaulC

6 bolt per cylinder?

Sales4@Texas-Speed

iTrader: (4)

This is a just a post to let you guys know what we are working on. These heads are still a ways out before being offered for sale.

supermouse4

Will a standard LS3/L92 intake work on these heads or not? I have to guess that you guys are working on this.

Keep up the great updates and work, we appreciate all that you do.

Beaflag VonRathburg

iTrader: (176)

You can see in the pictures that they have the added material for the extra bolts. Why would they design a head that doesn't accept the currently available OEM and aftermarket intake manifolds?

My guess is this is a revision of their PRC cathedral port head.

Jason 98 TA

iTrader: (4)

it's for ls3/l92 intakes.

We already have cathedral heads available to ship & in stock.

This is a new project for LS3 head applications that want a complete cnc runner instead of working from the GM casting.

Low_LSX

iTrader: (33)

Do you guys have a time frame for when these will be available? I would like to add these to my 376 LSX.

Low_LSX

iTrader: (33)

bump...

NemeSS

iTrader: (127)

what is the thickness of the available cathedral port heads deck?

ez2cdave

The CNC LS3 heads from Scoggin-Dickey ($750 each assembled) have these flow numbers. How do yours compare?

CYLINDER HEAD FLOW SPECS: (CFM)

.200 .300 .400 .500 .600 .650

INT 153 225 280 324 350 355

EXH 118 180 201 217 230 236

Dave

Jon@Texas-Speed

iTrader: (18)

It's a little early to be comparing flow numbers just yet. However, everyone has LS3 heads out and available now. The cool feature behind these is they will move a lot of air like the "square" port heads, yet be able to bolt on small bore! (Something that can NOT be done with a LS3/L92 GM casting head.) Not to mention all the advantages that an aftermarket casting offers for guys wanting LS3 heads including thicker deck surfaces for big power adders!

Jon

BlownVette 2001

iTrader: (2)

So can these be used with LS6 intakes or do you still have to use a LS3 style intake ?

Sales2@Texas-speed

iTrader: (5)

They're still square ports and will require the LS3/L76 intake.

BlownVette 2001

iTrader: (2)

Thanks. Do these heads use smaller valves compared to the factory LS3 heads? What's maximum RPM range of these heads ?

The stock Ls3 valves are a little on the heavier side and would seem to limit the upper RPM range.