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How much would CNC LS6 heads benefit a D1SC setup?

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Old 07-30-2006, 11:38 AM
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Default How much would CNC LS6 heads benefit a D1SC setup?

I will be going FI soon and would like to know if/how much I would benefit from putting on a set of TSP's LS6 heads. Thanks! supporting mods are in sig
Old 07-30-2006, 11:47 AM
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Well for starters it would make the same power at a lower boost level which would be easier on your motor and it will run cooler. If you can afford the heads definetly get them if you cannot afford them just go without them. You will just have to up the boost for the ported head power.
Old 07-30-2006, 11:51 AM
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Depends what kind of HP hoals you have in mind. I made 550/460 on stock heads with upgraded valve springs, a small blower cam, and D1SC at 8psi or so.

But like 52172 basically said... they certainly wouldn't hurt!
Old 07-30-2006, 11:56 AM
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Originally Posted by TrakDay
Depends what kind of HP hoals you have in mind. I made 550/460 on stock heads with upgraded valve springs, a small blower cam, and D1SC at 8psi or so.

But like 52172 basically said... they certainly wouldn't hurt!
Ya, if I could make 550 on stock heads, i wouldnt wanna spend the $1,500 on heads, gaskets, and install. Id be more than happy with 550 hp.
Old 07-30-2006, 12:00 PM
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Sounds like a plan. You will save quite a bit of money and still have the power you want.
Old 07-30-2006, 12:38 PM
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Velocity. take for instance...this is about a mustang but u'll get the idea. I have a friend who had a 306, 205cc heads, 14lbs of boost, big intake and cam...he was only doing 120mph in the 1/4. He go tired of it not running what he thought it should so he sold the shortblock. Now, my other friend bought it, put a cobra intake on it, stock 302 cam, out of the box Edelbrock RPM performer heads (165cc) and 12lbs of boost. because of his gearing he hits the limiter before the 1/4 mile but he hits 130.9mph.

Velocity

so if u want any type of head work done (which u probably don't need now) then get ur LS1 heads worked on like bowl work and a good valve job.
Old 07-30-2006, 01:17 PM
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Originally Posted by Screamin_Z
Velocity. take for instance...this is about a mustang but u'll get the idea. I have a friend who had a 306, 205cc heads, 14lbs of boost, big intake and cam...he was only doing 120mph in the 1/4. He go tired of it not running what he thought it should so he sold the shortblock. Now, my other friend bought it, put a cobra intake on it, stock 302 cam, out of the box Edelbrock RPM performer heads (165cc) and 12lbs of boost. because of his gearing he hits the limiter before the 1/4 mile but he hits 130.9mph.

Velocity

so if u want any type of head work done (which u probably don't need now) then get ur LS1 heads worked on like bowl work and a good valve job.
so are you saying smaller sized chambers will give me more velocity thus almost making a head swap a bad thing?? im kind of confused because in yoru post your second buddy went wtih smaller heads and made more mph.....
Old 07-30-2006, 01:25 PM
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I'm saying bigger isn't always better. he has a 306...205cc heads were too big. The other guy had his setup missmatched, he didn't understand how to make the proper setup. I'm NOT saying CNC LS6 heads are gonna be big, no way. what I am saying is u don't need those heads to make good power. If u were able to get ur LS1 heads worked with a valve job and bowl work, that's the way I'd go on the factory cube motor. If u want to save ur money for something else then that's fine. our heads have pretty damn good velocity, u'll be fine for now.

Last edited by Screamin_Z; 07-30-2006 at 01:32 PM.
Old 07-30-2006, 01:29 PM
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Originally Posted by Screamin_Z
I'm saying bigger isn't always better. he has a 306...205cc heads were too big. The other guy had his setup missmatched, he didn't understand how to make the proper setup. I'm NOT saying CNC LS6 heads are gonna be big, no way. what I am saying is u don't need those heads to make good power. If u were able to get ur LS1 heads worked with a valve job and bowl work, that's the way I'd go on the factory cube motor. If u want to save ur money for something else then that's fine. our heads have pretty dame good velocity, u'll be fine for now.
o ok, thanks!!
Old 07-30-2006, 01:40 PM
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Originally Posted by FSUNole17
Ya, if I could make 550 on stock heads, i wouldnt wanna spend the $1,500 on heads, gaskets, and install. Id be more than happy with 550 hp.
Hell I swapped to a smaller pulley and added methanol and was making over 600rwhp and 515trq on pump gas with the stock heads and stock bottom end.
Old 07-30-2006, 02:31 PM
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Same here. 10psi of boost, small 224/224 115LSA blower cam, stock heads/stock shortblock, and no Meth injection yet. I'm at 617rwhp/572rwtq at 6000rpm and trapping 130mph.... So its all about your power goals. I'm building a forged motor now with hand ported LQ9(317) truck heads, going to run 15psi boost with Meth inj. and shooting for 800rwhp....

But CNC LS6 heads will not hurt anything. Just not needed to make 600rwhp...
Old 07-31-2006, 05:33 AM
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Originally Posted by FSUNole17
I will be going FI soon and would like to know if/how much I would benefit from putting on a set of TSP's LS6 heads. Thanks! supporting mods are in sig
I don't see a forged bottom end listed for your engine. With the stock bottom end and the blower cam already in your engine, I wouldn't add heads to your combination. 8 psi of boost and the cam are all that I safely recommend on the stock internals. Some of pushed more power without any problems, but many more have had to have an unplanned engine rebuild. Bob
Old 07-31-2006, 07:17 AM
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Originally Posted by Exotic Performance Plus
I don't see a forged bottom end listed for your engine. With the stock bottom end and the blower cam already in your engine, I wouldn't add heads to your combination. 8 psi of boost and the cam are all that I safely recommend on the stock internals. Some of pushed more power without any problems, but many more have had to have an unplanned engine rebuild. Bob
forged 347 is in the plans in the future..... just not anytime soon. wanna see what i can make first before with around 7-8 psi



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