big hammer

How do you figure that out

G Atsma

This sounds like a job for....... TONY MAMO!

NAVYBLUE210

Or Jake Fusion

G Atsma

......yeah,... him too!

LilJayV10

iTrader: (39)

smh.....

G Atsma

Me too... lol

KCS

iTrader: (20)

And here....we.....go.....

big hammer

I think they both have 2.08 valves

G Atsma

OK, enough screwing around. Will SOMEBODY come and help our bud here with some answers??

Patron

Same ? as normal just with port sizes and valves sizes being Near the same. No major Difference.

KCS

iTrader: (20)

As with most questions here, it's as easy as a google search....

http://www.wallaceracing.com/discharge-coef.php

pantera_efi

iTrader: (1)

Hi Big, you have NO question able to be answered.

POST the Flow Sheet from EACH HEAD questioned.

The answer could then be made.

Lance

big hammer

TFS 235

big hammer

Mast 240 ls3's on a 3.9 bore

Jontall

You can always ask them for nitrous exhaust ports.

Patron

Same basic heads! If your were to place them on the same engine what you"d say would be the difference? In terms of Hp/ Tq? One has a 11 degree intake valve angle while the other a Nos exhaust port. ? of Hp and Tq or how they'd each preform.. or as you asked:
Which heads have a better discharge coefficient
Ask which name sounds better. And that's your answer. Very similar numbers and performance. That's even with one being a cathedral and the other being a rectangular style head.

Darth_V8r

iTrader: (4)

Not so sure. The mast heads are flowing on a 3.9" plate what the tfs are flowing on a 4.125" plate. That's probably your answer right there.

Patron

Brother even with bore sizes changing cfm generally stays they same. Done researched that one. Seen where guy uses different bore sizes with the same heads on the flow bench..... Same#.

big hammer

Probably matters how close the intake valve is squished to the bore

Patron

You can say that but ER racing Ls7 heads were basically touching the bore on the exhaust side. 4.065 bore Hp was still made. I understand the logic and facts yet Numbers are basically the same. So what does this say. They say Ls3 heads are so shrouded on a bore of under 4.060 like 4.005. Why I ask do the still make hp.