08-10 SS Turbocharged General Discussion Discuss the 2008 - 2009 Chevy Cobalt SS Turbocharged. On sale since the second quarter of 2008.

LNF head CFM?

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Old Jul 5, 2008 | 06:14 PM
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LNF head CFM?

Does anyone know what CFM the LNF head flows? Has Chevy even released it?

Last edited by RageTechnologies; Jul 5, 2008 at 06:50 PM.
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Old Jul 5, 2008 | 06:15 PM
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What's Dodge doing with an LNF head? lol Not that I know of tho
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Old Jul 5, 2008 | 06:23 PM
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im sure he meant chevy lol
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Old Jul 5, 2008 | 06:28 PM
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Just jabbing his ribs
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Old Jul 5, 2008 | 06:32 PM
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Old Jul 5, 2008 | 06:39 PM
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Bring it SS/TC! Ha, J/K.
/end off topic

I'm curious to the flow as well, hopefully they learned from my LSJ head and intake mani
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Old Jul 5, 2008 | 06:51 PM
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Whoops my bad LOL. thats what i get for hopping from cobalt forums to srt forums lol. i fixed it
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Old Jul 6, 2008 | 07:52 PM
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Anyone?
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Old May 24, 2009 | 04:54 PM
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BUMP!!!!!!

Anyone offering ported cylinder heads yet?
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Old May 24, 2009 | 04:55 PM
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They flow the same as the lsj head.
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Old May 24, 2009 | 05:00 PM
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Originally Posted by scott allen
They flow the same as the lsj head.
Hmm really?

Any flow charts floating around here?

Anyone offering p&p yet?
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Old May 24, 2009 | 05:03 PM
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well its the same head.

http://www.m2race.com/product_specs.asp?ID=5

Last edited by scott allen; May 24, 2009 at 05:03 PM. Reason: Automerged Doublepost
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Old May 24, 2009 | 05:10 PM
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Thanks. Same head... interesting.
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Old May 24, 2009 | 05:15 PM
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i think that zzp had a some lnf head number flotating around
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Old May 24, 2009 | 05:19 PM
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Any pics of a stock head off the car? Looks like from the link above that m2race grinds/shaves out the valve guides in the head... I'd like to know the valve guide length before being cut down.....
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Old May 24, 2009 | 06:29 PM
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Originally Posted by scott allen
They flow the same as the lsj head.
The LNF head outflows the LSJ on the exhaust side, but the LNF intake flow is terrible. They raised the floor to clear the DI injector and the result was an awful short turn radius .

Originally Posted by scott allen
It's obviously not the same head. The injectors spray into the combustion chamber on the LNF.

Last edited by Matt M; May 24, 2009 at 06:29 PM. Reason: Automerged Doublepost
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Old May 24, 2009 | 06:36 PM
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Originally Posted by Matt M
The LNF head outflows the LSJ on the exhaust side, but the LNF intake flow is terrible. They raised the floor to clear the DI injector and the result was an awful short turn radius .

It's obviously not the same head. The injectors spray into the combustion chamber on the LNF.
Yea that's what made me sketchy on what he said. That's why I was pretty surprised.
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Old May 24, 2009 | 06:59 PM
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not to be a complete dick here. shea. hopefully your cobalt stuff doesn't take as long as the spherical bushings do for the nsrt4's to get to market and shipped out. for future reference. you might want to figure out a way to get a rubber boot on them.

check the gm build books for your info you seek
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Old May 24, 2009 | 07:11 PM
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Is that nemo logged on as ragetech?
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Old May 24, 2009 | 07:13 PM
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Originally Posted by Area47
not to be a complete dick here. shea. hopefully your cobalt stuff doesn't take as long as the spherical bushings do for the nsrt4's to get to market and shipped out. for future reference. you might want to figure out a way to get a rubber boot on them.

check the gm build books for your info you seek
We had issues with machine shops but we got a lathe and cnc on the way so we wont be at the mercy of the machine shops back up's (tooling issues, failing machines, back and forth w/ conflicting machining idea's etc). We'd be addressing all that in house thus cutting down on both pricing and wait time since we don't have to out source the jobs and be at the mercy of a busy machine shops.

Keep in mind now that they are complete and we have tons done they leave the same day one places and order and is delivered within 3-5 buisness days. Its the manufacturing that takes time....

Don't know what issues you ran into thinking you need a rubber boot so please PM me with your problem or concern and we'll take into account your set-up and issue and address it if need be. Always open for comments

I have had the GM build books on PDF for the longest

Originally Posted by Darkmanx
Is that nemo logged on as ragetech?
No His right hand man.

Last edited by RageTechnologies; May 24, 2009 at 07:13 PM. Reason: Automerged Doublepost
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Old May 24, 2009 | 07:19 PM
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From: FL.. FT LAUDERDALE/MAIMI
Originally Posted by RageTechnologies


No His right hand man.
Who do you guys use for porting heads?
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Old May 24, 2009 | 07:40 PM
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^^^^^my dremel
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Old May 24, 2009 | 07:42 PM
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Originally Posted by freakta
^^^^^my dremel


I don think nemo would appreciate me giving away his secrets.
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Old May 24, 2009 | 07:43 PM
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Ergh pm me i have a lsj head i need ported locally.
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Old May 25, 2009 | 09:16 AM
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Originally Posted by RageTechnologies
Anyone?
ZZP flow bench tested it and the intake ports flow terrible. They flow less than the LSJ head. They picked up 35 whp and 45 wtrq with their ported head on a stock turbo tuned LNF.
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