[Land-speed] Torque Drop>From>JG Magoo

[DAW1]

First post here, though I've been following the list for about a year or 2. 
All this talk about spark advance in a top fueler made me come out of 
hiding. What about the info from Keith Black's website that says a top 
fueler does not actually NEED spark during the run, that the engine would 
continue to diesel until it ran out of fuel? This is the list of info that 
says the nitro is compress almost to a solid. And also can someone explain 
HOW the Formula 1 valve system works? I know they use air instead of 
springs, but where does that much air come from and how is it used? Thanks, 
doug walters
----- Original Message ----- 
From: "John Burk" <joyseydevil at comcast.net>
To: "LandSpeed List" <Land-speed at autox.team.net>
Sent: Thursday, May 01, 2008 3:31 PM
Subject: Re: [Land-speed] Torque Drop>From>JG Magoo


> Top fuel spark lead varies with the shape of the combustion chamber . 
> Blown
> fuel 392 hemis ran best with 19 to 28 deg with extreme of 32 deg . It took
> several years for the Ramchargers , Keith Black and Garlits to realize 
> that
> 426 hemis needed way more . In '66 or early '67 Black tried 40 deg which
> wasn't enough and he quickly pulled it back for fear it was way too much .
> Spark advance is not linear . When the piston is half way up the fuel 
> burns
> relatively slowly . A fellow I know got the mag a tooth off on his top
> fueler which was about 140 deg and it ran about the same .
>

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