there's some HP in them thar Heads
 

Has anyone replaced their heads with the GM Performance 6.2L LS7 style heads?

Apparently you can replace your intake and heads with these new heads and not only gain torque and HP but get a huge amount of flow.

Pretty cheap too. You can get setup for less than $1500.

heads are GM part # 12582713

Re: there's some HP in them thar Heads
 

wouldnt you get better numbers porting and polishing your heads? people with superchargers (especialy bigger pullys) TBs, headers and so on will get massive HP and TQ improvements

Re: there's some HP in them thar Heads
 

No

Re: there's some HP in them thar Heads
 

NO? wow how much HP are thoes heads gonna give you? do you have a link were i can check them out?

Re: there's some HP in them thar Heads
 

http://www.gmhightechperformance.com...ine_l92_heads/

all I found

I got the info from a local engine builder

Re: there's some HP in them thar Heads
 

L92 heads are flowing as much, if not more than, the ported CNC LS1/6 heads. Numbers I've seen for stock heads is 330+ cfm at .600 lift and these numbers are as-cast. Some cleanup wok on the ports and bowls and people are expecting 360+ cfm.

Re: there's some HP in them thar Heads
 

holly **** thoes heads are only $1000 and for $500 bucks more you get a 90mmTB and fuel rails. this pricing along with humdingahs flow numbers. this is a great choice. i never knew GM motors were so cheep to modify. i have been spending all my cash on my AMG E55 were a 80mm TB is $4000 bucks by its self.

Re: there's some HP in them thar Heads
 

Does anyone know if these would do well with a magnuson sc?

Thanks,
Tim

Re: there's some HP in them thar Heads
 

yes that is ideal the more mods you have the more the heads need to be changed. id also get that 90mm TB. i assume you have long tube headers? if not youll need that also.

Re: there's some HP in them thar Heads
 

HMMMMMM.... can tell this will never end.

Thanks,
Tim

Re: there's some HP in them thar Heads
 

Current S/C won't work as the intake ports are significantly different. You'd have to possibly combine an L92 S/C intake (possibly from a kit for the 6.2L 'Slades but I haven't seen that they've released one yet) with the current S/C. Exhaust ports are a different shape too...

Re: there's some HP in them thar Heads
 

im sure maggie has a intake for thoes heads unless they are brand new to the market????

Re: there's some HP in them thar Heads
 

Good. Can hang on to a few dollars a little while longer :)

Tim

Re: there's some HP in them thar Heads
 

It'll be the same intake as used in the new 6.2 L Escalade blower kits...and I've been checking their site periodically and haven't seen one announced yet.

Re: there's some HP in them thar Heads
 

right, teh intake and exhaust ports are completely different than the current lq9 heads. If you swap heads, your gonna need the l92 manifolds and intake, which are very cheap as well.

those heads are gonna be huge, out flowing aftermarket ported heads for more than half the money.