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Edelbrock Victor head users - How much timing?

Posted By: BradH

Edelbrock Victor head users - How much timing? - 12/24/10 05:04 AM

Anyone who is using (or has tested) Edelbrock Victor heads... what did you end up running for total ignition timing? Also, what CR and octane fuel were you using?
Posted By: Performance Only

Re: Edelbrock Victor head users - How much timing? - 12/24/10 06:16 AM

34 degree's 14-1 110 octane
that probably doesn't help you much though.
Posted By: rowin4

Re: Edelbrock Victor head users - How much timing? - 12/24/10 06:33 AM

Is there a general rule on timing and compression? 34 at 14:1 what would 10:1 pump gas be?
Posted By: G_bob

Re: Edelbrock Victor head users - How much timing? - 12/24/10 06:36 AM

Victor max wedge here, 13:1, 32 degrees total made best HP on dyno. I haven't touched timing or jetting since it was dynoed. So don't know what "real world", as in, track tested best is.
Posted By: 440Jim

Re: Edelbrock Victor head users - How much timing? - 12/24/10 02:50 PM

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@144.83
33º, 1.334, 3.827, 5.926@116.97, 7.748, 9.301@144.63

richened carb, then
33º, 1.333, 3.832, 5.935@116.67, 7.761, 9.316@141.38
36º, 1.335, 3.826, 5.926@116.82, 7.750, 9.300@141.23
Posted By: goldenlancer

Re: Edelbrock Victor head users - How much timing? - 12/24/10 03:11 PM

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.
Posted By: mistress

Re: Edelbrock Victor head users - How much timing? - 12/24/10 03:15 PM

Fully ported Hughes Victor heads. 38 at launch and i pull 3 degrees out in high gear for more MPH. 13:1 on Methanol
Posted By: sjs64polara

Re: Edelbrock Victor head users - How much timing? - 12/24/10 04:01 PM

505 cross ram engine with 38 deg, 10:1 pump gas 730 hp


Attached picture 6375286-Time_Mach_10_sat_417_web.jpg
Posted By: RAMM

Re: Edelbrock Victor head users - How much timing? - 12/26/10 02:42 AM

471- 11.5 comp 36 total for best power-717 hp.JRob
Posted By: dvw

Re: Edelbrock Victor head users - How much timing? - 12/26/10 02:56 AM

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
Posted By: BradH

Re: Edelbrock Victor head users - How much timing? - 12/26/10 06:03 PM

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.
Posted By: G_bob

Re: Edelbrock Victor head users - How much timing? - 12/26/10 06:50 PM

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.
Posted By: RemCharger

Re: Edelbrock Victor head users - How much timing? - 12/26/10 07:59 PM

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...
Posted By: RAMM

Re: Edelbrock Victor head users - How much timing? - 12/26/10 10:06 PM

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



These heads are not that good. J.Rob
Posted By: 440Jim

Re: Edelbrock Victor head users - How much timing? - 12/26/10 10:16 PM

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:

Attached picture 6379179-Ignition_timing_9-5-2009.jpg
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