O.N.

Without getting into the whats your purpose bullshit which head is the best flowing.

Best i have found is the mast 305cc ls7
Lift range im comparing is 650 on a 4.125 bore

Bout'ItZ28

iTrader: (19)

Chris Frank with Frankenstein Racing Heads or
All pro 12-2 or actually retro all pro for that lift.

Briou

iTrader: (1)

Brodix or RHS castings worked over by Chris Frank!

O.N.

I guess the next question is does anyone make an LS7 intake port head with any style exhaust port so you need custom headers but you get much better exhaust flow.

So far these are the flow numbers i have:

Brand--------------------------Intake-------Exhaust-----Bore
Lift-----------------------------0.650----------0.650

Mast motorsports LS7------------388-----------247---------4.125
Texas Speed PRC LS7x 285cc-----393-----------241---------4.125
RHS wont tell me as stated in email
Lingenfelter LS7------------------395-----------239---------4.125

A.R. Shale Targa

iTrader: (2)

Those exhaust flow numbers could be without a pipe which usually adds another 20 cfm

O.N.

yeah thats the thing you have to trust them + hey all the numbers can be made up bullshit anyway unless you have 1 independent tester doing all the tests not associated to them like hot rod magazine or something.

+ different flow benches will yield different results.

R6cowboy

iTrader: (3)

Well, since the OP didn't mention anything about price. Don't bother with anything already posted, see link below.

http://araoengineering.com/lsx.htm

COSPEED2

iTrader: (7)

I would use ANY of the All Pro or the new Brodix heads. They are powerhouses. And you dont need "custom" headers for the LS7 port, they just have a different flange for the D port and the primaries are shaped as such. If the port is too big esp to flow those numbers, you will need a custom set anyway. Also make sure to check on what bore size the heads are flowed, and quite a few are not corrected either.

427zm

iTrader: (9)

My Frankenstien heads will be getting dyno'd tomorrow so,we'll see what they do w/ my 235/251 cam. Big flow numbers for sure (410/270), with my 434, I'm excited to see what they'll do! As you can see, the "D" style exhaust port is basically gone from a "D" to an "O"!

Briou

iTrader: (1)

What castings did he start with....He is doing a set of Brodix heads for me this week...

John B

iTrader: (10)

Mozez

Ari G

iTrader: (25)

Depending on what they go on (Fi or Nitrous)if you can use OEM Ls7 castings,they can flow more then the numbers posted here above

COSPEED2

iTrader: (7)

Flow doesnt mean everything, esp just dry flow. There is alot more to a combo than just max flow.

427zm

iTrader: (9)

LS7's.

Briou

iTrader: (1)

Good deal....I am interested in the results!

427zm

iTrader: (9)

I'll be updating my build thread tomorrow w/ results!

https://ls1tech.com/forums/generatio...per-liter.html

Ari G

iTrader: (25)

There are no problems with LS7 mixture motion or wet flow

More air is more power,we are talking about avg flow numbers across the lift profile not peak

COSPEED2

iTrader: (7)

Im pretty sure someone in this thread was just comparing only peak numbers. And afaik no one is doing any wet flow numbers/comparos.