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18* heads
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DRR Pro
Picture of 00 DEAD ON
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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


Brian Mollison
2009 RaceTech Dragster
2020 Sumerduck Dragway VA Top ET Champion
2017 Sumerduck Top ET & SSS Track Champion
2017 MAC Top ET Track Champion
2009 Sumerduck Dragway Va Top ET & IHRA SSS Track Champion
2008 IHRA Division 1 Top ET Bracket Final Runner-up
2007 Colonial Beach Dragway Top ET Track Champion
 
Posts: 1024 | Location: Stafford, Virginia | Registered: October 03, 2006Reply With QuoteReport This Post
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Picture of Coloradoracer
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Advance 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
 
Posts: 1388 | Location: Back home in Colorado! | Registered: February 13, 2011Reply With QuoteReport This Post
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Are these dart heads..
 
Posts: 1155 | Location: USA | Registered: December 04, 2008Reply With QuoteReport This Post
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Picture of 00 DEAD ON
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Big Chief heads


Brian Mollison
2009 RaceTech Dragster
2020 Sumerduck Dragway VA Top ET Champion
2017 Sumerduck Top ET & SSS Track Champion
2017 MAC Top ET Track Champion
2009 Sumerduck Dragway Va Top ET & IHRA SSS Track Champion
2008 IHRA Division 1 Top ET Bracket Final Runner-up
2007 Colonial Beach Dragway Top ET Track Champion
 
Posts: 1024 | Location: Stafford, Virginia | Registered: October 03, 2006Reply With QuoteReport This Post
DRR S/Pro
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quote:
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.
 
Posts: 2009 | Location: Tewksbury, MA,USA | Registered: November 03, 2000Reply With QuoteReport This Post
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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.
 
Posts: 101 | Location: Ohio | Registered: December 19, 2014Reply With QuoteReport This Post
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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?
 
Posts: 2009 | Location: Tewksbury, MA,USA | Registered: November 03, 2000Reply With QuoteReport This Post



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quote:
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.
 
Posts: 101 | Location: Ohio | Registered: December 19, 2014Reply With QuoteReport This Post
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