6 bolt heads
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Launching!
Joined: Mar 2005
Posts: 229
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From: cobourg ON
6 bolt heads Ive been looking everywere for heads to build a seriouse boost 427 but have not come across 6 bolt heads anywhere if anyone has any information that would be great thanks
Here's the latest offering from All Pro Cylinder heads: WCCH All Pro LS7 info page
Feel free to contact us with any questions you may have.
Richard
Feel free to contact us with any questions you may have.
Richard
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ETP LS1 6-bolt heads are the ones you want for boost. I believe they are only like $3800 completely built ready to install.
All Pro and ET both offer 6 bolt heads with cathedral ports so you can use all your early intake parts. We have used a few sets of the All Pro cathedrals with good results. The LS7 style ports will move a bit more air for the race stuff, but you do need all the new intake parts and more expensive rocker gear.
Kurt
Kurt
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We're finishing up our 6 bolt casting right now! check out this---->
We're currently working on several different versions of the heads but past that I can't really give any additional information.
Here's what I can tell you:
.800" thick deck!!
Modified Valve Angles
Better Than Stock p/v on some port configurations!
Multiple Port Options
Multiple Chamber Options
6 Bolt Upgraded!!
356-T6 Aluminum Casting
Designed & Built completely to our specs!
We're currently testing various versions of these cylinder heads on several different applications.
Sorry I can't give any additional information currently.
All I can say is I think you guys will really like the flow/features/pricing of this cylinder head!
We're currently working on several different versions of the heads but past that I can't really give any additional information.
Here's what I can tell you:
.800" thick deck!!
Modified Valve Angles
Better Than Stock p/v on some port configurations!
Multiple Port Options
Multiple Chamber Options
6 Bolt Upgraded!!
356-T6 Aluminum Casting
Designed & Built completely to our specs!
We're currently testing various versions of these cylinder heads on several different applications.
Sorry I can't give any additional information currently.
All I can say is I think you guys will really like the flow/features/pricing of this cylinder head!
__________________
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
TECH Enthusiast
Joined: Jan 2008
Posts: 625
Likes: 0
All Pro LSW 12° Cylinder Head Flow
Valve Lift Intake flow Exhaust flow
.100" 75.2 54.3
.200" 160.9 108.2
.300" 242.5 162.1
.400" 295.0 212.8
.500" 343.3 240.9
.600" 379.5 254.7
.700" 401.3 261.0
.750 410.2 262.4
Test bore = 4.155"
Intake tested with radius flow plate.
Exhaust tested without test tube.
TECH Enthusiast
Joined: Jan 2008
Posts: 625
Likes: 0
All Pro LSW 12° Cylinder Head Flow
Valve Lift Intake flow Exhaust flow
.100" 75.2 54.3
.200" 160.9 108.2
.300" 242.5 162.1
.400" 295.0 212.8
.500" 343.3 240.9
.600" 379.5 254.7
.700" 401.3 261.0
.750 410.2 262.4
Test bore = 4.155"
Intake tested with radius flow plate.
Exhaust tested without test tube.
Valve Lift Intake flow Exhaust flow
.100" 75.2 54.3
.200" 160.9 108.2
.300" 242.5 162.1
.400" 295.0 212.8
.500" 343.3 240.9
.600" 379.5 254.7
.700" 401.3 261.0
.750 410.2 262.4
Test bore = 4.155"
Intake tested with radius flow plate.
Exhaust tested without test tube.
There's porters getting 397cfm @ .650 and in the 270's on the exhaust @ .650 with LS7's if I'm not mistaken. And the LS7's will be a helluva lot cheaper than the All Pros.
Yes ET and All Pro both have 6 bolt LS7 and Catherdal port heads. But just saying a Ported GM LS7 head can be made to flow great doesn't mean it is up to the standards of the ET and All Pro head.
TECH Enthusiast
Joined: Jan 2008
Posts: 625
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The ET's will outflow the All Pros, especially on the exhaust port..and be A LOT cheaper. I think they're $4,000 complete. Aren't the All Pros like $7,000-$8,000 complete??
Actually the ET and All-Pro's are comparable in price just depends how you option it out. Spring, valve and rocker choices make huge differences in price as I found out . Better flow doesn't always mean better heads, not implying anything, just saying you have to look at everything about the head.
. Better flow doesn't always mean better heads, not implying anything, just saying you have to look at everything about the head. 
