May 06, 2019, 12:31 PM
00 DEAD ON18* heads
On my 632 18* alky terminator motor I had my heads softened in the quench area. I run 16/1 compression. How much timing can I run safely? Running 28* now. In summer temps how much can I get away with without hurting anything?
Thanks in advance
May 06, 2019, 07:55 PM
AlaskaracerAdvance it 1* at a time and watch the plugs. Only way to tell. If it keeps picking up et and doesn't show detonation, then keep adding. Advancing timing can also lean it slightly so need to watch fuel if you're very close on tune as is. It's no different than any other combo, just a balancing act. Usually you'll see a spread port deal happy around 28-32* depending on chamber size and shape. Softened may like a bit more when run N/A, but again plugs will tell you what it likes..
Mark Goulette
Owner/Driver of the Livin' The Dream Racing dragster
www.livinthedreamracing.com"Speed kills but it's better than going slow!"
Authorized Amsoil Retailer
May 07, 2019, 09:44 AM
TOP38quote:
Originally posted by 00 DEAD ON:
Big Chief heads
You didn't answer the question, Dart, Brodix and others make 18 degree BC heads.
Typically with gas these head like 34 degrees but on alky you're likely to need 2 -4 degrees less IMO.
May 07, 2019, 11:01 AM
gxp7903Dart makes the Big Chiefs..
Brodix calls them Big Dukes.
I agree with Mark, advance it 1-2 degrees at a time. The time slip will tell the story, along with the plugs.
May 07, 2019, 11:21 AM
TOP38quote:
Originally posted by gxp7903:
Dart makes the Big Chiefs..
Brodix calls them Big Dukes.
I agree with Mark, advance it 1-2 degrees at a time. The time slip will tell the story, along with the plugs.
What's Edelbrock call them?
May 07, 2019, 01:11 PM
gxp7903quote:
Originally posted by TOP38:
quote:
Originally posted by gxp7903:
Dart makes the Big Chiefs..
Brodix calls them Big Dukes.
I agree with Mark, advance it 1-2 degrees at a time. The time slip will tell the story, along with the plugs.
What's Edelbrock call them?
Edelbrock calls them Big Victor.
AFR calls them Magnum.