News:

It appears that the upgrade forces a login and many, many of you have forgotten your passwords and didn't set up any reminders. Contact me directly through helpmelogin@dodgecharger.com and I'll help sort it out.

Main Menu

Compression ratio effect on horsepower

Started by RECHRGD, November 01, 2009, 10:31:38 AM

Previous topic - Next topic
Print
Go Down Pages 1 2 All
User actions

firefighter3931

#25
December 18, 2009, 10:09:43 AM
Thats a nice improvement in cylinder pressure....you will feel the difference in the seat of your pants.  ;)



Ron
68 Charger R/T "Black Pig" Street/Strip bruiser, 70 Charger R/T 440-6bbl Cruiser. Firecore ignition  authorized dealer ; contact me with your needs

RECHRGD

#26
December 18, 2009, 10:14:26 AM
Quote from: firefighter3931 on December 18, 2009, 10:09:43 AM
Thats a nice improvement in cylinder pressure....you will feel the difference in the seat of your pants.  ;)



Ron

I be hoping so!
13.53 @ 105.32

68r/t

#27
December 18, 2009, 10:44:34 AM
How much did they end up milling off the heads?

b5blue

#28
December 18, 2009, 12:09:31 PM
Also what effect on timing changes, this will be interesting on long sustained cruise MPG.  :scratchchin:

RECHRGD

#29
December 18, 2009, 01:16:45 PM
Quote from: 68r/t on December 18, 2009, 10:44:34 AM
How much did they end up milling off the heads?

.050
13.53 @ 105.32

RECHRGD

#30
December 18, 2009, 01:19:40 PM
Quote from: b5blue on December 18, 2009, 12:09:31 PM
Also what effect on timing changes, this will be interesting on long sustained cruise MPG.  :scratchchin:

It liked more timing than before.  We took it to 38*.  Before it would lose power above 34*.
13.53 @ 105.32

b5blue

#31
December 18, 2009, 01:31:46 PM
I'm interested in this topic and went with 9 to 1 speed pros for my 440 with 346 heads for a daily driver (after living with a 509 cam and closed chamber heads octane requirements  :eek2: ) I'm running 89 octane OK so far.  :2thumbs: 

RECHRGD

#32
December 18, 2009, 01:43:57 PM
Quote from: b5blue on December 18, 2009, 01:31:46 PM
I'm interested in this topic and went with 9 to 1 speed pros for my 440 with 346 heads for a daily driver (after living with a 509 cam and closed chamber heads octane requirements  :eek2: ) I'm running 89 octane OK so far.  :2thumbs: 

I probably could have run 89 with the aluminum heads before upping the CR, but I never tried it.  I also had the 346 heads with around 9.2 CR before the swap.  It would ping like mad with anything above 36* advance or even less on a hot day.  Bob
13.53 @ 105.32
Print
Go Up Pages 1 2 All
User actions