bifster

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

2000_SS

iTrader: (24)

ET Performance, Warhawk LS7x, All Pro (i think).....

there's a few out there..you just gotta look.

Richard@WCCH

iTrader: (3)

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

needadvice

ETP LS1 6-bolt heads are the ones you want for boost. I believe they are only like $3800 completely built ready to install.

bifster

well im not realy excited about having to find the ls7 style intake just to use some heads why isnt there any ls2 style heads with 6 bolts yet

427

iTrader: (3)

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

89lx-ls1

iTrader: (23)

contact mark lacy at weldtech 317-852-4450 tell him Jon coleman told you to call and talk to him about his ported all pros.

Vengeance Racing

Trickflow has a new 6 bolt head about to be out very soon. Should be the best thing out there.

Jason 98 TA

iTrader: (4)

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!

needadvice

Besides the GM carb style intake, what other intake options would work for HIGH boost set-ups, like in the 28psi range?

427

iTrader: (3)

The carb intake is the most common, but some choose the sheetmetal custom intake for high power.

Kurt

flawless35th

iTrader: (1)

allpro's 6bolt flow 390 out of the box but they dont say what lift

DanZ28

iTrader: (5)

This is nice to see, looks like several options for the 6 bolt heads coming.

Beaflag VonRathburg

iTrader: (176)

It's in Richard's link he posted:

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.

needadvice

Pretty badass. But not quite as good as ported LS7 heads.
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.

speedracer5532

iTrader: (8)

And not have the thick deck for forced induction and no 6 bolt of the GM LS7 head.

needadvice

Doesn't ET have an LS7, 6 bolt head with a thicker deck for boost apps.?

speedracer5532

iTrader: (8)

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.

needadvice

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??

DanZ28

iTrader: (5)

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.