H/C with supercharger...benefits?
Thread Starter
Staging Lane
Joined: Jan 2002
Posts: 56
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From: Coral Springs, FL
H/C with supercharger...benefits? Just to check my understanding, please correct me if I'm wrong. If you say get a good set of heads that flow well, this will allow you to run less boost and still make the same amount of horsepower as before?? If this is correct, would it be even more beneficial to get a set of 6.0L heads, port them, so not only the CR would be down, but better airflow through the heads??? Or is it just as beneficial to maybe use 5.7 heads??? Also how about thicker gaskets to lower the CR.... Just trying to find out a great setup that would be easier on the engine. Thanks!
Launching!
Joined: Oct 2002
Posts: 282
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From: Sugar Land, Texas
Re: H/C with supercharger...benefits? Evil-
You are basically correct. Better flowing heads (6.0 or LS6) will allow you to make the same horsepower under lower boost or more horsepower at the same boost whichever you prefer. If you go with unmilled 6.0 or LS6 heads you will also lower compression, and thicker gaskets will lower it even further.
I will be making approximately 500 RWHP with 5-6 PSI of boost from a DSC1 with my setup. <img border="0" title="" alt="[Eek!]" src="gr_eek2.gif" /> With stock heads/exhaust I would be making about 460 RWHP pushing 8 PSI.
Alex
<small>[ December 16, 2002, 03:21 PM: Message edited by: 35THSSLE ]</small>
You are basically correct. Better flowing heads (6.0 or LS6) will allow you to make the same horsepower under lower boost or more horsepower at the same boost whichever you prefer. If you go with unmilled 6.0 or LS6 heads you will also lower compression, and thicker gaskets will lower it even further.
I will be making approximately 500 RWHP with 5-6 PSI of boost from a DSC1 with my setup. <img border="0" title="" alt="[Eek!]" src="gr_eek2.gif" /> With stock heads/exhaust I would be making about 460 RWHP pushing 8 PSI.
Alex
<small>[ December 16, 2002, 03:21 PM: Message edited by: 35THSSLE ]</small>
TECH Enthusiast
Joined: Dec 2001
Posts: 553
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From: Columbia, MD
Re: H/C with supercharger...benefits? There was an EXCELLENT discussion on this very topic on the "other" board recently.
http://www.ls1.com/forums/showthread...hreadid=200790
Assuming that you have ZERO detonation (pre-ignition), the MAIN POINT of the discussion was that horsepower is horsepower. Whether you achieve 500RWHP through 9lbs of boost and stock heads, or 7lbs of boost and ported heads, the resulting explosion in the combustion chamber will produce the same horspepower, and hence the same strain on the bottom end of the motor. Lowering the boost with ported heads while maintaining the same horsepower may help in terms of avoiding blown head gaskets, but it will not "save" your bottom end.
http://www.ls1.com/forums/showthread...hreadid=200790
Assuming that you have ZERO detonation (pre-ignition), the MAIN POINT of the discussion was that horsepower is horsepower. Whether you achieve 500RWHP through 9lbs of boost and stock heads, or 7lbs of boost and ported heads, the resulting explosion in the combustion chamber will produce the same horspepower, and hence the same strain on the bottom end of the motor. Lowering the boost with ported heads while maintaining the same horsepower may help in terms of avoiding blown head gaskets, but it will not "save" your bottom end.
Launching!
Joined: Oct 2002
Posts: 282
Likes: 0
From: Sugar Land, Texas
Re: H/C with supercharger...benefits? Crunch,
Thanks for the link, however, I will have to say I read and interprested those posts very differently than you. <img border="0" alt="[cheers]" title="" src="graemlins/gr_cheers.gif" />
<small>[ December 16, 2002, 03:40 PM: Message edited by: 35THSSLE ]</small>
Thanks for the link, however, I will have to say I read and interprested those posts very differently than you. <img border="0" alt="[cheers]" title="" src="graemlins/gr_cheers.gif" />
<small>[ December 16, 2002, 03:40 PM: Message edited by: 35THSSLE ]</small>
Staging Lane
Joined: Jun 2002
Posts: 62
Likes: 0
From: Layton, UT
Re: H/C with supercharger...benefits? Hey, that was mine! I started that one.
After sifting through everyones opinion, I think that porting the heads on a FI motor with a stock bottom end is a waste of time.
If you all ready have the 6.0 heads, porting them would be a good idea. Running less boost, but creating the same HP should be the same to the bottom end, but not to tother things. The blower would be under less stress, heat in the intake charge would be less, etc...
If the heads are off, my vote is port them. Thicker gaskets aren't a good idea. The "squish" area is affected and the burn suffers resulting in less HP. IMHO it also increases the risk of blowing a gasket.
My .02 <img border="0" title="" alt="[Wink]" src="gr_images/icons/wink.gif" />
After sifting through everyones opinion, I think that porting the heads on a FI motor with a stock bottom end is a waste of time.
If you all ready have the 6.0 heads, porting them would be a good idea. Running less boost, but creating the same HP should be the same to the bottom end, but not to tother things. The blower would be under less stress, heat in the intake charge would be less, etc...
If the heads are off, my vote is port them. Thicker gaskets aren't a good idea. The "squish" area is affected and the burn suffers resulting in less HP. IMHO it also increases the risk of blowing a gasket.
My .02 <img border="0" title="" alt="[Wink]" src="gr_images/icons/wink.gif" />
