427 Heads (C5R vs. LS7)
Launching!
Joined: Nov 2003
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From: Denver, CO
Originally Posted by LS7SS
There are C5R heads that flow around 400cfm but I think at much higher lift like .700 or .750 so this would mean the LS7 heads should be better for street applications with a hydraulic cam and .600 lift.
Launching!
Joined: Mar 2004
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From: Ontario Canada
Originally Posted by Christos
Dude, you stored your IROC? If I were you, i'd put the LS7 in that!
Then I heard about the LS1 so I bought the 02 SS.
I think I will be selling the 89 IROC in the next year to offset the cost of the LS7 and other mods I'm doing to the 02
The 89 has only 26000KM on it so I should get some good cash for it
I see yours has been sitting for a while too?
Last edited by LS7SS; Mar 19, 2005 at 09:01 PM.
Launching!
Joined: Mar 2004
Posts: 222
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From: Ontario Canada
Originally Posted by DrkPhx
But not from the factory. C5R heads have to be ported. I posted this link in an earlier thread but here are the flow numbers for the LS7 heads. Corvette Fever magazine had a great article with pictures of the LS7 heads and they look fantastic.
http://www.gearchatter.com/viewtopic11203.php
http://www.gearchatter.com/viewtopic11203.php
My point is that if the LS7 heads flow 360 or 348 or whatever at .600 it will be fine for street use IMO. Any port work will increase the size of the port volume and a few extra CFM at higher lift will not likely benefit any cam most of us will be using on the street. There will likely be much potential for those those willing to run a solid cam and over .700 lift I have no doubt.
I also have no doubt that after a few years of R+D maybe porting shops will be able to improve the mid lift #'s on these heads (maybe unfinished as cast heads will be available from GM?). Till then I will be bolting a set of them on my 427 as I get them from GM since I'm pretty sure they will work quite fine
Last edited by LS7SS; Mar 19, 2005 at 09:28 PM.
Adkoonerstrator
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From: Deep in the seedy underworld of Koonerville
Originally Posted by BrentB@TEA
.....There is a new truck head coming out that looks killer also.
That is just not right to make us drool like that.
<----Truck Director
Launching!
Joined: Mar 2004
Posts: 222
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From: Ontario Canada
Originally Posted by BrentB@TEA
We have not seen a set of them CNC ported yet.
There is a new truck head coming out that looks killer also.
There is a new truck head coming out that looks killer also.
New truck head huh. Similar to the LS7 or the LS1?
Adkoonerstrator
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From: Deep in the seedy underworld of Koonerville
Originally Posted by BrentB@TEA
the new truck head "I have heard rumors of" Is very similar to the ls7 head. Raised runner etc. I think it will be out on a larger ci truck engine. If my source is right
Is very similar to the ls7 head. Raised runner etc. I think it will be out on a larger ci truck engine. If my source is right LS1 Tech Stories
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Originally Posted by DrkPhx
But not from the factory. C5R heads have to be ported. I posted this link in an earlier thread but here are the flow numbers for the LS7 heads. Corvette Fever magazine had a great article with pictures of the LS7 heads and they look fantastic.
http://www.gearchatter.com/viewtopic11203.php
http://www.gearchatter.com/viewtopic11203.php
s for C5R heads to compare?
Launching!
Joined: Nov 2003
Posts: 228
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From: Denver, CO
Originally Posted by LS7SS
Yup I put it away when I bought a house way back in 91.
Then I heard about the LS1 so I bought the 02 SS.
I think I will be selling the 89 IROC in the next year to offset the cost of the LS7 and other mods I'm doing to the 02
The 89 has only 26000KM on it so I should get some good cash for it
I see yours has been sitting for a while too?
Then I heard about the LS1 so I bought the 02 SS.
I think I will be selling the 89 IROC in the next year to offset the cost of the LS7 and other mods I'm doing to the 02
The 89 has only 26000KM on it so I should get some good cash for it
I see yours has been sitting for a while too?
Sounds great! I wish you the best of luck with that.
Mines still sitting. It is way overdue for an engine swap. If things with me and work out good, then I just might. : )
I'd be really interested in possibly using a set of LS7 heads in a forced induction application, but I'm kind of concerned with the durability... I mean, that was a weak spot (on BIG power motors) with the factory LSx heads (that is addressed with the AFR's, with the thicker deck), I'm just wondering if it will be a weak spot on the LS7's, too.
Originally Posted by BurnOut
I'd be really interested in possibly using a set of LS7 heads in a forced induction application, but I'm kind of concerned with the durability... I mean, that was a weak spot (on BIG power motors) with the factory LSx heads (that is addressed with the AFR's, with the thicker deck), I'm just wondering if it will be a weak spot on the LS7's, too.
