Mr.MartyStone

iTrader: (12)

Cary and gang,
What's the latest on these badass heads? You guys seemed pretty confident that they would be out for this season of racing, but this season is already in full swing.

Are these heads going to be a reality anytime soon or should I look for other heads? I only ask because your stuff is badass and am looking forward to running these L92 castings from you guys.

Thanks guys,
Marty

Mr.MartyStone

iTrader: (12)

Well, I guess I should have posted this on Monday instead of the weekend. I pm'd Craig with a link to this thread for info so that everybody can hear. I know there are a lot of interested people in these heads.

Marty

Cary@Perf-Induction

iTrader: (1)

Marty

That is ironic that you posted that today, I am acually at the shop finializing that part right now. Just happened to stroll on here and see this. I will not post any final numbers until I flow one off the cnc at completion, But I can tell you that with a 2.055 intake valve we hit 348 cfm on the first shot with a 3.900 bore. It flowed all the way up to .700 lift without backing up a bit. I have castings in house that i made especially for this project, so there will be a few sets avalible immediately after we run them on the dyno. There will be two different configurations, one for the 346 based engines and one for the big boys with a larger valve package. I will keep you informed. To post an exact date would only be misleading, but I am confident with our findings.

Beaflag VonRathburg

iTrader: (176)

Those results sound very impressive! I look forward to hearing more about them.

Mr.MartyStone

iTrader: (12)

Cary, where will the pricing come in at ballpark range? Are we looking at more $ than your 245's? I guess I read your old thread wrong in that I was to understand that you guys were providing castings sans port work for the small bore guys.

These results are kickass though man. Thanks for sharing. Could we expect these heads to be available by September?

Thanks,
Marty

Cary@Perf-Induction

iTrader: (1)

They will be avalible in July. It is not an entirely new casting, just a revised version to our current heads, They will be priced in a similar range to our 245/255 heads.

They will be fully cnc ported like all of our heads.

Jason99T/A

iTrader: (21)

Cary, what chamber sizes will be offered in the small bore version?

MPHmotorsports

iTrader: (18)

Jason whats up man?
I left you a message about rebuilding that 346 for me yesterday did you get it?
I am also gonna guess that even the small bore L92 head is gonna be 235+. If it gets smaller then that then I will be surprised.
IMO these heads are gonna be in desperate need of a LSX style L76 manifold.
Hopefully someone will make one shortly.

Mr.MartyStone

iTrader: (12)

Good, then they'll still flow to support some high rpm stock cubeage. I'm going carb'd intake anyway...gonna have a screamer on my hands.

Marty

Anonymous

What intakes will work with this 11* L92 small bore head?

MPHmotorsports

iTrader: (18)

As of know the only plastic that will work will be the L76/L92 manifold as far as I know.
Then you have your carb style manifolds.

Stang's Bane

iTrader: (22)

L76 works also.

MPHmotorsports

iTrader: (18)

Thats what I ment to type.
OOPS

Beaflag VonRathburg

iTrader: (176)

https://ls1tech.com/forums/showpost....9&postcount=82

ET 240cc heads

ET 255cc heads

GM L92 Fully Assembled Cylinder Head
http://www.sdparts.com/product/12582...inderHead.aspx
Part Number: 12582713
Price: $399.25 x 2 = $798.5

$2650 - $798.5 = $1851.5 more
$2750 - $798.5 = $1951.5 more

How is that competitive?

Cary@Perf-Induction

iTrader: (1)

First of all, I did not say competitive with the GM castings, Sorry, but they are less than a quality race head. Some of you guys will find this out the hard way when you push them too far. We did not design our L-76 style head to be cheap and have barriers. It was intended to use the already avalible plastic and 4bbl aluminum manifolds and will be a player on the higher rpm 346's and a nice addition to the 383's. Competitive with other aftermarket heads is what I meant. Sorry I did not mean to come across abbrasively, kinda sounded like that after I read it. We will have an as-cast version avalible soon after the cnc heads are avalible. These will be more competitive with other as-cast heads already on the market.

ls1muscle

iTrader: (16)

By high rpm, how high do you mean? When is dyno testing going to be done?

Mr.MartyStone

iTrader: (12)

Ditto. I'm only looking to spin my pig to around 7500-7600 if it is still making power. How high are you intending for these heads to be spun to on stock cube solid roller setup (will have to be wet sump w/ accusump so can't spin too high)?

Marty

Cary@Perf-Induction

iTrader: (1)

I was speaking of 7000-7300 range, I would hope the L76 style manifold would carry up there. I'm not looking in the unrealistic ranges. It would not fit the market that most of you guys are in. 500 street cars to 1 all out race car. We will have two different port volumes with the 3.9 bore L92 style head, so if someone wants to build a higher RPM combo (7500 +) They will be able to use the larger cylinder head. I am a firm believer that you do not need a large bore to make all the power you need out of these engines. They dont look as good on the flow bench, but the small bores do make great power, We have not yet seen the limits. That was our purpose to release this part.


cary

Mr.MartyStone

iTrader: (12)

Cary are you saying that you are designing these heads for more of the racer in mind or the more ballsy street/strip car? I drive the **** out of my car as "unstreetable" as it is according to a lot of people. If you think I can make the power with a hyrdraulic roller I'll stay with that setup for a little more ease of setup and less maintenance.

Are you looking to make peak power around 7000 and have it carry a few hundred more rpms? I am sorry for the questions I just had a hard time understanding your true intention for these heads.

Also what will the two different port volumes be for these heads, will they use the stock L92 rocker configuration, and what will freedrop come in at for these heads?

Thanks,
Marty

Anonymous

I thought the L92 heads were 15* like the LS1/LS2/LS6 etc...
I thought only the LS7 heads were 11*?

So I was thinking that these ETP heads were an L92 design, but on 11* to enhance flow?

So which heads are which?

BTW what is the Deck Thickness on the ETP L92's vs the stock OEM L92 heads?

I have a H&C car, but shoot a little N2O now and then.
I am looking to upgrade my heads.