LS7 Heads

**Sarge** · 08-11-2006, 09:07 AM

Spoke with Allen Nelson today. The LS7 heads w/ valve assembly...$400 bucks per from GM High Performance. WOW! Some reading for ya below. But $400 per head and flow 330cfm @.600. Holy crap! I bet the aftermarket heads folks just crapped their pants.
http://www.precisionporting.com/index_files/Page349.htm

**Nicbmann** · 08-11-2006, 09:22 AM

will these fit the ls1 motor? How big of cam would be needed so as to take advantage of all the air? Just curious.

**Sarge** · 08-11-2006, 09:41 AM

Originally Posted by Nicbmann

will these fit the ls1 motor? How big of cam would be needed so as to take advantage of all the air? Just curious.

I'm checking on the LS1 fitment. "They" took a stock LS2...put the heads/intake and TB on it with a 240/580 cam and made 530 to the wheels. And for under $1500 bucks.

**Nicbmann** · 08-11-2006, 01:02 PM

Thats a lot of power for cheap. Hope it fits the ls1. How would that cam be for a daily driver? Would you need to run a bigger throttle body for an ls1, or would the factory size be alright? Thanks for the info.

**LS2GTO** · 08-11-2006, 07:50 PM

Is that for real? For that cheap too? If that head will truly bolt on an LS1 or LS2 block then the ante just got bigger for us GM guys! Damn a 500hp N/A daily driver!

I think I'm gonna hold off on getting the vortex s/c and see if this is more cost effective!

**Sarge** · 08-12-2006, 04:33 AM

I'm getting the build specs and pics....I'll post up with all the specifics I can get my hands on.

**Sarge** · 08-12-2006, 05:08 AM

OK...from September Hot Rod Mag..
"On June 1, GMPP announced the availability of the L92 cylinder head, PN 12582713, for $375 completely assembled. This is an aluminum head that's used on the 6.0L Tahoe L76 Engines (and rumored to be the engine in the new Camaro), and it flows a reported 330cfm. Yeah, we know. You can now get LS7 head performance for $750 a pair, assembled. The best new is you can get a matching intake manifold (PN 12580123) that comes assembled with 36 lb/hr injectors, fuel rails, and a 90mm TB for $475." - Rob Kinnan
Will not work on a LS1 but will work on the bigger bore LS2/402's etc. So you get 330cfm flow for $350'ish compared to aftermarket ( AFR etc) $2000. But check out the TB/Fuel Rails/Injectors/Intake for $475.

txcosmos · 08-12-2006, 07:03 AM

There are some issues with the offset valves and rockers too. You need to take a look at the layoutof the valvetrain. Pretty different than anything out there.

**Sarge** · 08-12-2006, 07:11 AM

Originally Posted by txcosmos

There are some issues with the offset valves and rockers too. You need to take a look at the layoutof the valvetrain. Pretty different than anything out there.

Yup...we looked at that...I'm waiting on the pics/dyno sheet of the 05 GTO they have already got running with this setup.

txcosmos · 08-12-2006, 09:37 AM

You know who to call when you have those stage III's available....

**Sarge** · 08-12-2006, 12:27 PM

Originally Posted by txcosmos

You know who to call when you have those stage III's available....

Did you ever get the Pat's on that bad boy Tex?

txcosmos · 08-12-2006, 02:02 PM

Gonna be around two weeks. Every time I get ready, I have to go on the road. Trying to get a little time together and give the ole girl some attention. I think I'm gonna get them installed in town, and see allen for the tune when I go to SA next month.

This way I can get an updated dyno on the same one I used last time, and get a before and after. I'd really like to hit 400, we will see...

**Goatdriver** · 08-12-2006, 03:33 PM

Sounds very interesting, what kind of exhaust did they run-headers or factory? Could you bolt the heads, intake and headers on and run the LS2 cam and still get good numbers?

**Sarge** · 08-12-2006, 03:53 PM

Originally Posted by Goatdriver

Sounds very interesting, what kind of exhaust did they run-headers or factory? Could you bolt the heads, intake and headers on and run the LS2 cam and still get good numbers?

I waiting on the build sheet and the dyno sheet...

**LS2GTO** · 08-12-2006, 06:36 PM

So it can only work with 402 ci. or more to run those heads and intake?

**0rion** · 08-12-2006, 08:23 PM

Wonder why they're so cheap? That's an incredible deal.

**Sarge** · 08-13-2006, 05:28 AM

I would tend to not look at them as "cheap" but the aftermarket folks getting caught with the overpricing they have enjoyed with no competition from GM in the performance market.
Looks like this is only going to work with the LS2/larger bore (4.125) motors.

**0rion** · 08-13-2006, 06:08 AM

Yeah, I kinda figured the ole LS1 would be left out in the dark

Well, using my usual cheap train of thought LS6 heads are numerically lower than LS7 heads and should be cheaper right?

**Sarge** · 08-13-2006, 06:11 AM

Originally Posted by 0rion

Yeah, I kinda figured the ole LS1 would be left out in the dark

Well, using my usual cheap train of thought LS6 heads are numerically lower than LS7 heads and should be cheaper right?

I'm running 243 castings right now on the 402. No complaints...but dayum...the cost is what is amazing.

**Nicbmann** · 08-13-2006, 03:58 PM

That is a bummer that they won't work for the ls1. That could have been a lot of fun.

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