LS7 intake and heads
LS7 intake and heads GM parts direct has them both listed now
Intake-12569011 251.48 (decent)
heads- 12578450 515.35 no too bad..
I pretty sure the heads are bare though... but this would make a great package to your LS1,2 or 6 thats for sure.
Intake-12569011 251.48 (decent)
heads- 12578450 515.35 no too bad..
I pretty sure the heads are bare though... but this would make a great package to your LS1,2 or 6 thats for sure.
Originally Posted by CONVERTED
GM parts direct has them both listed now
Intake-12569011 251.48 (decent)
heads- 12578450 515.35 no too bad..
I pretty sure the heads are bare though... but this would make a great package to your LS1,2 or 6 thats for sure.
Intake-12569011 251.48 (decent)
heads- 12578450 515.35 no too bad..
I pretty sure the heads are bare though... but this would make a great package to your LS1,2 or 6 thats for sure.
On The Tree
Joined: Jan 2005
Posts: 108
Likes: 0
Originally Posted by CONVERTED
GM parts direct has them both listed now
Intake-12569011 251.48 (decent)
heads- 12578450 515.35 no too bad..
I pretty sure the heads are bare though... but this would make a great package to your LS1,2 or 6 thats for sure.
Intake-12569011 251.48 (decent)
heads- 12578450 515.35 no too bad..
I pretty sure the heads are bare though... but this would make a great package to your LS1,2 or 6 thats for sure.
Originally Posted by crow@sdpc
FYI,~gm parts direct is NOT a LS1TECH sponsor.We are here to answer any tech questions by phone or email here at SDPC.WE have very competive freight rates.Give us a call or pm or fax we will be ready.Our pricing is very competitive and you get to talk to somebody.We have the best freight rates!
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LS-7 Heads and intake will not work very well on stock (346 CUIN)displacement motors........big ports and valves will kill torque and bottom end. You will need big cubes or a highly modified, high RPM 346 CUIN motor to take advantage of them......
just like AFR 185's VS. 225's..... bigger is not always better.
my $.02
brad
just like AFR 185's VS. 225's..... bigger is not always better.
my $.02
brad
You guys do understand that a 2.20" intake valve will not fit a 346 (3.89" bore x 3.622" stroke) right? Or atleast not without some radical *** valve centerline and a very very small exhaust valve. I don't think these will work on anything significantly under a 4.125" bore but I maybe wrong on that. Anybody try them yet on a 4.030" bore?
The LS7 Cylinder head will not fit on any bore smaller than about 4.060. I have some flow sheets & detailed specs on the heads, but they will only fit big bore applications.
__________________
Jason
Co-Owner, Texas Speed & Performance, Ltd.
2005 Twin Turbo C6
404cid Stroker, 67mm Twins
994rwhp/902lb ft @ 22 psi (mustang dyno) www.Texas-Speed.com
Jason
Co-Owner, Texas Speed & Performance, Ltd.
2005 Twin Turbo C6
404cid Stroker, 67mm Twins
994rwhp/902lb ft @ 22 psi (mustang dyno) www.Texas-Speed.com
Originally Posted by Jason 98 TA
The LS7 Cylinder head will not fit on any bore smaller than about 4.060. I have some flow sheets & detailed specs on the heads, but they will only fit big bore applications.
damit I forgot about the valve size...
GOD THERE GOES THAT PLAN......
wait what is the bore on a 6.0L iron block? will these fit the 6.0L iron block or Ls2? 
6.0l block=4.0" bore. safest you can go up to is 4.060 but that is really pushing the limits of the block and most iron blocks wont sonic test at that bore.
Best bet to use these heads is a resleeved ls1 or ls2 block. I believe darton just came out with a dry sleeve for the ls2 which will let you go 4.125-4.160" which would work very well with these heads.
Nate
Best bet to use these heads is a resleeved ls1 or ls2 block. I believe darton just came out with a dry sleeve for the ls2 which will let you go 4.125-4.160" which would work very well with these heads.
Nate
TECH Apprentice
Joined: Jul 2002
Posts: 369
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From: clio mi
OK I know this may sound stupid but could you put new seats in the heads and use a smaller intake say a 2.18? I know it would kill some of the flow but they should still flow better than most heads. I plan on building a 408 and I am looking for the best combo to make the most power. Thanks for any input.
On The Tree
Joined: Jan 2005
Posts: 108
Likes: 0
Originally Posted by n2ojunkie
OK I know this may sound stupid but could you put new seats in the heads and use a smaller intake say a 2.18? I know it would kill some of the flow but they should still flow better than most heads. I plan on building a 408 and I am looking for the best combo to make the most power. Thanks for any input.
The New head will use the stock LS1 valve train.Should be available sometime after the first of the new year.
On The Tree
Joined: Jan 2005
Posts: 108
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Originally Posted by JarrettL
How will that head be priced in comparison to the LS7 head?
We will continue too let you guys know everything we know when it happens.
Thanks again to everyone who supports us through this venture.
On The Tree
Joined: Dec 2004
Posts: 151
Likes: 0
From: San Diego, CA
Originally Posted by crow@sdpc
Yea I am sure that can be done,but GM will soon have a new head that uses the same port configuration as the LS7 that has a smaller valve for smaller bores.
The New head will use the stock LS1 valve train.Should be available sometime after the first of the new year.
The New head will use the stock LS1 valve train.Should be available sometime after the first of the new year.