HPE's new race LS6 heads
09-09-2004, 04:41 PM
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HPE's new race LS6 heads HPE's cylinder head porting specialist has just finished our new LS6 race heads, and the results look promising! The first set will be going on a customers 427 we're building for him within 2 weeks, so we'll have hp numbers soon... Here are the flow numbers.
Intake:
.200"- 148
.300"- 212
.400"- 276
.500"- 324
.600"- 349
.650"- 352
Exhaust: NO PIPE
.200"- 135
.300"- 187
.400"- 220
.500"- 234
.600"- 241
.650"- 249
Chamber size: 60cc
These are completely hand ported, so the price is not for the faint of heart. We are currently working on another set of LS6's to send off to be digitized and have cnc'd for mass production, that will significantly lower the price. But results are yet to be seen from the cnc'd version. Typically we see pretty big loss in flow going the cnc route. But that's ok, because the set we'll be sending off will more than likely be flowing around 360 cfm before they're digitized
Please call or email us if you would like more information.
Chuck
Intake:
.200"- 148
.300"- 212
.400"- 276
.500"- 324
.600"- 349
.650"- 352
Exhaust: NO PIPE
.200"- 135
.300"- 187
.400"- 220
.500"- 234
.600"- 241
.650"- 249
Chamber size: 60cc
These are completely hand ported, so the price is not for the faint of heart. We are currently working on another set of LS6's to send off to be digitized and have cnc'd for mass production, that will significantly lower the price. But results are yet to be seen from the cnc'd version. Typically we see pretty big loss in flow going the cnc route. But that's ok, because the set we'll be sending off will more than likely be flowing around 360 cfm before they're digitized
Please call or email us if you would like more information.
Chuck
09-09-2004, 05:02 PM
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Originally Posted by term
Looks good chuck, I may look into a set of these..
BTW : The 408 is doing great
BTW : The 408 is doing great
Originally Posted by NoseUpChromeDown
What size valves were used for this test?
Originally Posted by GrannySShifting
what about hand finishign CNC cores?
09-09-2004, 08:32 PM
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Nice numbers Chuck,360 that is terrific!!
Thats terrific Chuck,those are great numbers on both intake and the exhaust.What are the port volumes????Are these heads
welded?? 
Thats terrific Chuck,those are great numbers on both intake and the exhaust.What are the port volumes????Are these heads
welded?? 
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09-10-2004, 12:29 AM
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Originally Posted by Beast96Z
Port volume's?
Flowed on a 4.125 I assume?
Flowed on a 4.125 I assume?
I'll have to get back with everyone on the port volume. We haven't checked that yet... But we will probably check that tomorrow...
Chuck
09-10-2004, 12:36 PM
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Originally Posted by Chuck@HPE
Just measured a port, it was 247cc's.
Chuck
Chuck
09-10-2004, 02:31 PM
#14
Looks like a great flowing head. Where were these flowed and what kind of bench was used? Were the valves 5/16 or 8mm? What is the port volume on the exhaust side? Nice job man
09-10-2004, 03:28 PM
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Originally Posted by Mike K.
Wow that is a large port but I am really curious to see how it does on that 427. Those flow numbers are awesome!!! Let us know as soon as you have numbers.
Brian, they were on an SF600...
Chuck
09-11-2004, 01:42 AM
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I went up to the shop and saw thoes heads in person today, all I have to say is damn. Whoever thoes heads are for is a verry lucky man. Good job chuck and crew.
