? on milling heads

Reply Subscribe

Thread Tools

Search this Thread

Jun 10, 2008 | 07:40 PM

jonnyc

Thread Starter

On The Tree

iTrader: (18)

Joined: Sep 2002

Posts: 174

Likes: 0

From: sacramento

? on milling heads

how much would you have to mill a set of 241 heads to get them to 60cc?

thanks

Jun 10, 2008 | 08:20 PM

Viper

12 Second Club

iTrader: (6)

Joined: Dec 2001

Posts: 4,909

Likes: 3

From: Cleveland, OH

1cc = .006 so what do the 241's start at?

Jun 10, 2008 | 08:23 PM

IMD

Banned

iTrader: (10)

Joined: Sep 2004

Posts: 567

Likes: 0

From: Texas

66cc

so .036 to be exact.

Jun 11, 2008 | 08:31 PM

GuitsBoy

TECH Senior Member

iTrader: (4)

Joined: Apr 2003

Posts: 6,249

Likes: 3

From: Long Island, NY

66.67cc chambers technically.

I milled .040 and consider it a 60cc chamber.

Jun 11, 2008 | 08:34 PM

PONTIAC SLP

TECH Fanatic

iTrader: (3)

Joined: Mar 2007

Posts: 1,591

Likes: 0

From: Middle east , Kuwait

Quote:

Originally Posted by GuitsBoy

66.67cc chambers technically.

I milled .040 and consider it a 60cc chamber.

gains ? how much RWHP u get from milled heads

Jun 11, 2008 | 08:59 PM

Michael02hawk

TECH Fanatic

iTrader: (26)

Joined: Feb 2005

Posts: 1,155

Likes: 1

From: Rochester, NY

Quote:

Originally Posted by PONTIAC SLP

gains ? how much RWHP u get from milled heads

Doesn't milling the heads favor added torque, with minimal hp gain?

Jun 11, 2008 | 09:03 PM

GuitsBoy

TECH Senior Member

iTrader: (4)

Joined: Apr 2003

Posts: 6,249

Likes: 3

From: Long Island, NY

I milled the heads at the same time I ported them out, and swapped to an ever so slightly larger cam, so its tough to say. Its true that the primary result of higher compression is torque, but for any given RPM if you increase the torque, you increase the HP too. The main advantage to milling is the added drivability. it really gives you back the low end you tend to lose when going cam only. Do it. Youll be happy you did.

Amazing '71 Camaro Restomod Is Modern Muscle Car Under the Skin

Verdad Gallardo

6 Common C5 Corvette Failures and What's Involved In Repairing Them

Pouria Savadkouei

Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph

Verdad Gallardo

Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked

Pouria Savadkouei

Top 10 Most Powerful Chevy Trucks Ever Made!

Hennessey's New Supercharged Silverado ZR2 Has 700 HP

Verdad Gallardo

Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes

Verdad Gallardo

Awesome K5 Blazer Restomod Comes With C7 Corvette Power

Verdad Gallardo

10 Camaros You Should Never Buy

10 LS Engine Myths That Refuse to Die

Verdad Gallardo

Jun 12, 2008 | 06:15 AM

PONTIAC SLP

TECH Fanatic

iTrader: (3)

Joined: Mar 2007

Posts: 1,591

Likes: 0

From: Middle east , Kuwait

woow amazing so good luck , don't forget to share graph dyno

Jun 12, 2008 | 06:40 AM

#10

GuitsBoy

TECH Senior Member

iTrader: (4)

Joined: Apr 2003

Posts: 6,249

Likes: 3

From: Long Island, NY

Quote:

Originally Posted by jonnyc

i can't remember the exact formula,but i think for every 1 point you increase compression you gain 10% power.so if you were 10.25:1 and had 400hp at 11.25:1 you should have 440 hp.

I dont know about all that. It might be a good theory, but in reality the numbers just arent there. A 400 HP cam only car needs to get some seriously good flowing heads as well as a bump in compression in order to hit 440. My guess is that a going from 10:1 to 11:1 is only gonna bring the car from 400 to 410 RWHP. But thats just a number pulled right out of my ***.