Re: Edelbrock Victor head users - How much timing?
[Re: Performance Only]
#886992
12/24/10 02:33 AM
12/24/10 02:33 AM
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Joined: Jun 2005
Posts: 6,257
gulfport, ms, west mi
rowin4
master
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master
Joined: Jun 2005
Posts: 6,257
gulfport, ms, west mi
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Is there a general rule on timing and compression? 34 at 14:1 what would 10:1 pump gas be?
it's ok to butt heads, just don't do it with a butthead
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Re: Edelbrock Victor head users - How much timing?
[Re: BradH]
#886994
12/24/10 10:50 AM
12/24/10 10:50 AM
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Joined: Jan 2003
Posts: 16,923
NC
440Jim
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 16,923
NC
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FWIW, this is what Johnny Burch saw while testing at MIR on 10/24/2010. 542 CID (4.380 x 4.50 stroke), 12.7 CR (0.040" down the hole), 276/280 at 0.050" roller cam, max wedge Victor heads, in this order as the weather got a little slower as the day went on: 36º, 1.328, 3.814, 5.911@117.10, 7.730, 9.281@144.8333º, 1.334, 3.827, 5.926@116.97, 7.748, 9.301@144.63richened carb, then 33º, 1.333, 3.832, 5.935@116.67, 7.761, 9.316@141.3836º, 1.335, 3.826, 5.926@116.82, 7.750, 9.300@141.23
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Re: Edelbrock Victor head users - How much timing?
[Re: 440Jim]
#886995
12/24/10 11:11 AM
12/24/10 11:11 AM
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Joined: Nov 2003
Posts: 440
SW pa
goldenlancer
mopar
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mopar
Joined: Nov 2003
Posts: 440
SW pa
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I have a 10 to 1 499 that runs on 93 with no problem runs N/SS B best timing that I found with dish pistons and 150# cranking comp is 40* less is slower on the ET.
N/SS
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Re: Edelbrock Victor head users - How much timing?
[Re: sjs64polara]
#886998
12/25/10 10:42 PM
12/25/10 10:42 PM
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Joined: Feb 2006
Posts: 1,051
The Great White North
RAMM
super stock
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super stock
Joined: Feb 2006
Posts: 1,051
The Great White North
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471- 11.5 comp 36 total for best power-717 hp.JRob
2009 PHR\EMC Competitor
2010 PHR\EMC Competitor
2011 PHR\EMC Competitor
2012 PHR\EMC Competitor
2013 PHR\EMC Competitor
2014 HotRod/EMC Competitor
2015 HotRod/EMC NoShow
2016 HotRod/EMC 3rd place SPEC Bigblock
2018 HotRod/EMC 7th place G3
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Re: Edelbrock Victor head users - How much timing?
[Re: dvw]
#887000
12/26/10 02:03 PM
12/26/10 02:03 PM
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Joined: Jan 2003
Posts: 15,439
Val-haul-ass... eventually
BradH
OP
Taking time off to work on my car
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OP
Taking time off to work on my car
Joined: Jan 2003
Posts: 15,439
Val-haul-ass... eventually
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Quote:
... I am surprised at the amount of timing to gain best power.
Same here, but I had the same observation re: how much timing people seem to run w/ Indy BB heads, too. 
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Re: Edelbrock Victor head users - How much timing?
[Re: BradH]
#887001
12/26/10 02:50 PM
12/26/10 02:50 PM
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Joined: Jan 2003
Posts: 3,616
Riverside, Ca
G_bob
master
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master
Joined: Jan 2003
Posts: 3,616
Riverside, Ca
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Quote:
Quote:
... I am surprised at the amount of timing to gain best power.
Same here, but I had the same observation re: how much timing people seem to run w/ Indy BB heads, too.
I haven't tried any adjustments at the track yet, but 32 degrees made more power than 34 on the engine dyno on my setup.
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Re: Edelbrock Victor head users - How much timing?
[Re: G_bob]
#887002
12/26/10 03:59 PM
12/26/10 03:59 PM
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Joined: Nov 2004
Posts: 2,825
Sk. Canada
RemCharger
master
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master
Joined: Nov 2004
Posts: 2,825
Sk. Canada
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Quote:
Quote:
Quote:
... I am surprised at the amount of timing to gain best power.
Same here, but I had the same observation re: how much timing people seem to run w/ Indy BB heads, too.
I haven't tried any adjustments at the track yet, but 32 degrees made more power than 34 on the engine dyno on my setup.
It also includes rod/stroke ratio and piston head design... 
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Re: Edelbrock Victor head users - How much timing?
[Re: dvw]
#887004
12/26/10 06:16 PM
12/26/10 06:16 PM
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Joined: Jan 2003
Posts: 16,923
NC
440Jim
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 16,923
NC
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Quote:
I don't run Victor head but I am surprised at the amount of timing to gain best power. These numbers reflect those of a stock style iron head. I would think that with a more modern chamber and better plug location they would need less. Has anyone besides Jim tried less during the same day? Just curious
Doug
In my car, I have Indy 440-1 heads, 13.5 CR with flat tops, 68cc, 511 CID, and this is all the ignition timing my motor needs:
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