Better late than never, here is the World LS1X 15 deg head. The initial back orders for this head, part # 025150, will be filled within two weeks from today.
This is the 220 runner, 64 cc chamber head. Heads will be available in volume after the initial orders are filled.
This very head was the final approval piece. It flowed 295 / 200 with 1” entry plate and without pipe, at 28”Hg, on our Superflow 1020, at .600 lift. The test bore size was 4.155”. We’re telling all the parameters in case you find another head mfg. that tested on a 76 degree day at 56 Ft above sea level when Jupiter was aligned with Pluto and has a Superflow 1020. Then the numbers will be a valid comparison.
The entire flow sheet will be posted on our site shortly. These numbers were generated with no back-cuts on valves and are as you will “open the box.”
We expect that the talented porters and professionals among you will see significant increases due to the generous material surrounding the ports, with not too much effort.
Remember, there are differences among flow benches but as an evaluation tool they are valuable for comparative improvements on your own project, less so as a shopping tool. We have changed our policy of not releasing flow numbers because the current tech-minded public uses them as a yardstick and will only consider a purchase if the numbers can be compared to competitors.
We and our competitors, virtually all of whom make excellent products and have spent many thousands of dollars to tool, cast and machine their parts, are subject to a restless marketplace which can negate an excellent design for a few CFM-which may or MAY NOT translate to a half-tenth or 2 MPH. Witness the “…reworked AFR heads from TEA” thread nearby.
We never race flow benches.
Here are the pics.

 

one word......beautiful......

 

That is excellent news! Glad to see those hurdles being overcome.

Tony

 

Great news.

Hope you can release all the components shortly.

 

Just out of curiousity, what are the advantages of the 15deg. head vs. the traditional lsx style? better ports due to valve angle or what?

also, i'm assuming well need a sheetmetal intake?

either way, great looking head.

 

15 Deg is the normal lsx style , except the LS7 and maybe some of the newer ones.

 

wow, i'm an idiot. i thought it was a 16deg. head.

 

Very nice piece as always, any word on pricing?

 

1WHITETA,
I'm not sure I understand your question... I believe that original gm heads are 15 degrees. Ours are as well, ours simply flow better than theirs do. One of the advantages to moving to a lower angled valve train is that up to a point it allows you to maximize valve size without sacrificing lift. An extreme comparison would be an old school SBC at 23 degrees compared to say 12 or 15 degrees of valve angle. The more lift you run, the bigger valves you run, the closer you get to the side walls of the cylinders. Yes port geometry changes favorably as well. No you do not need a sheetmetal manifold for the 15 degree head. Hope this helps.

 

yup, helps alot. I'm an idiot who's been out of the game for afew years, and I thought the lsx heads were a 16deg. head. Still, that explanation of low valve angle advantages was helpful.

Thanks.

 

A few questions here:

Is the valve guide spacing the same as stock?

Will they permit using stock length valves?

Is the valve cover rail raised?

Are the spring pockets the stock diameter?

Lastly, is the rocker boss height the same as stock?

Sorry for all the questions at once.


Respectfully,

Richard

 

Well put. Whether you're talking about flow benches or dynos, the frustrations in comparing them are the same. I see the same issue with engine and chassis dynos.

 

Awesome. Simply killer.
Maybe 120gt the intake port, 120gt, 240gt, 320gt and polish the exhaust port and the combustion chamber and you are set !!

 

Interesting statement.

 

Was wondering if there is anything to report on the blocks. Have had a deposit on one for a long time now.

 

c5ls1,
These will be $570 bare, $817-$902.49 assembled, depending on spring/valve packages.
Richard,
Valve guide spacing: stock
Valve length: we will use Manley Severe Dutys and Racemasters: 5.300 OAL.
V/C rails: +.350
Spring pockets: cut 1.6 fot 1.550 springs
Rocker bosses:stock hgt.
asmokegars
The 9.24 deck will be first, and I'm still told early Nov.
Thanks all for asking.

 

That has to be each, right..........
Still, $1,805.00 for a pair of assembled heads of this caliber is a killer deal!!!!

 

1CAM,
Yes, each and thanks.

 

First off, great news. Glad to hear things have come together for you guys... A lot of folks are very excited to see your stuff hit the street.

Second....

This should be a sticky... Pay attention people, its been said before, it'll be said again till some of you get it.

Same bench, same operator, same test procedure, same time, etc... then the results MAY have some merit (some of this depends on the operator).

Different bench, different mfg, different test procedure, etc... Results at best show "trends" of the head, but offer NO A to B concrete comparison.


Remember, 340 on one bench may be 320 on another. It could even be even less on another...

 

Awesome. My wife should get into nursing school next spring or fall....takes 2 years to finish....don't you hate it when you plan how to spend money you don't even have.