ONEBADWS6

iTrader: (22)

I was just wondering what people are getting through there intakes as that is the number that realy matters. I herd the intake is a restriction past 260cfm. Please stat what brand and stage head you have as well as valve size. Thanks.

ONEBADWS6

iTrader: (22)

Anyone?

The Juggernaut

iTrader: (7)

Anyone have stock broken valve guides in thier stage 2 heads causing the valve to hit thier piston thus seperating the valve face from the stem destroying the piston(sendind schrapnal everywhere) then wedging verticle in the head and taking out the whole motor with no recoarse?
No?

TTT then.....

LS1derfull

My testing showed 285cfm at .575" lift with Ls6 intake on 243 casting Zo6 head ported by myself. Valves are Ferrea 2.02" with custom grinding to my specs. My 241 castings ported by me, with stock valves flowed 265cfm at same lift with ls6 intake in place

ONEBADWS6

iTrader: (22)

Or get a head returned to you with a welded rocker boss? No? TTT!

The Juggernaut

iTrader: (7)

Imagine after getting the heads back,they used a broken/rewelded core that was not cleaned or checked,dropped and bent the corner down,lube everywhere that has tons of metal shavings in it.
Imagine if the flow #'s weren't even CLOSE like the first set.
Boy that would be somethin',huh?

Oh..TTT

JF WS6

Ok....... I gotta ask...... WHOSE heads did you guys buy?! If a vendor sold you heads that were initially broken and rewelded and they did a poor repair or used old parts that caused a failure which damaged your whole engine, I think they should be liable for whatever repairs are necessary.

ONEBADWS6

iTrader: (22)

The full story will be coming, Im just curious if anyone who has heads that flow 300cfm is getting more then 260 through the intake as I am not.

lsx24

iTrader: (45)

Absolute saw ~280 through the ls6 intake manifold and their 310+ cfm heads, if I remember correctly. In fact, I posted in that thread not too long ago, you might want to search for that chart that they listed with the exact numbers, corrected to a certain atmosphere.

ONEBADWS6

iTrader: (22)

See my heads flowed 300cfm at .575 lift but still only went 260 through the intake. At .500 lift they flowed 286cfm and saw 259 through the intake. So it looks like the intake is the problem. I also flowed them with a sheet metal intake (not Sure whos) and got 268 through it. What correction factor id Absolute using?

JF WS6

I'm not sure whose heads these are, but I remember a couple people commenting that their set of TEA heads stalled after .500 or .550 with the intake on. This may be the problem you are experiencing, that's more of what it sounds like to me rather than the intake. There are people running heads that flow higher than yours (Stage III) that still use the LS6 intake and the heads continue to flow up to .600.

JurisAg02

How about through a Holley Intake? Anyone seen any gains with it on the dyno/track? Porting one of those should reduce the bottle neck the LS6 intake suffers from I assume....

ONEBADWS6

iTrader: (22)

My guys heads flow 285 at .600 and with his race ported Holly intake he still only got 260 through the intake. His heads also flow up to .700 so no reverson problems.

2001 Pewter WS6

iTrader: (43)

My old LS1 heads flowed 269 through the intake. The new LS6 heads will be a lot more than that... BTW they are from Jay as well...

lsx24

iTrader: (45)

https://ls1tech.com/threads/showflat...amp;PHPSESSID=

LS1derfull

Im really surprised to hear this because sheet metal intake design should straighten air flow into port, maintaining most of heads flow(bare) The port on intakes entry angle must not be coposetic with head in your testing.

LS1derfull

Yes if Ls6 heads are ported similarly to mine, you will see close to 285cfm with LS6 intake.