DodgeCharger.com Forum
March 04, 2021, 12:08:30 AM *
Welcome, Guest. Please login or register.

Login with username, password and session length
News: DodgeCharger.com decals are available here!
 
   Home   Help Calendar Login Register Chat  
Pages: 1 2 [3]  All   Go Down
  Print  
Author Topic: Doing a little dyno testing on a low compression 440.  (Read 71115 times)
500Jon
Senior Member
****
Offline Offline

Posts: 915



« Reply #50 on: January 31, 2015, 10:03:22 AM »

Hey old Guy....

Wonderful work there fella!!!
I've built a lot of 440's, don't think I've seen any .160 down the bore pistons though?
Mostly around the .120 giving 8.2 comp with late heads?
Fantastic figures with the mods you made!
452's will easily beat those donkey 516's... 2thumbs

Question please...what's the best compression for an iron headed 440???
We always say 9.5 to 1 is as good as it gets...for pump gas... scratchchin

Got a 1964 Fraud 427 here that has a cast crank, didn't seem to worry those guys lol!!!
Logged

IF A JOB's WORTH DOING, ITS WORTH DOING WELL, RIP DAD.
4-SPEED, 1969 Charger-500 is the most Coolio car in the World!
heyoldguy
Full Member
***
Offline Offline

Posts: 459


« Reply #51 on: February 01, 2015, 03:48:54 PM »

There is no best compression, just the best for the combination you build. I have run iron heads with 7.5:1 to 11.9:1 compression on 91 octane.
Logged
500Jon
Senior Member
****
Offline Offline

Posts: 915



« Reply #52 on: February 02, 2015, 09:48:38 AM »

Valid point there Old Guy...
I've run 12.5 with iron heads and pump-gas too.
My point was, best compression for street motor.
Some Folks I know have really struggled with anything over 10 to 1.(static)
I always think that's down to the cam being too small and too much DCR?
The older cams from MP are not up to snuff anymore....
Lunatti are doing well for street 440's with dual patterns.
Milder intake lobes and bigger exhaust, giving good vacuum for Brake Boosters.

At least a budget build 440 doesn't need expensive machine-work... 2thumbs
Logged

IF A JOB's WORTH DOING, ITS WORTH DOING WELL, RIP DAD.
4-SPEED, 1969 Charger-500 is the most Coolio car in the World!
Pages: 1 2 [3]  All   Go Up
  Print  
 
Jump to:  

Powered by MySQL Powered by PHP Powered by SMF 1.1.11 | SMF © 2006-2009, Simple Machines LLC Valid XHTML 1.0! Valid CSS!
Page created in 0.04 seconds with 18 queries.