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SBF Alky timing and plugs

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SBF Alky timing and plugs  Empty SBF Alky timing and plugs

Post  dfree383 January 25th 2024, 10:27 pm

Where’s a good place to start on a SBF for timing and plugs?

Z304 heads
14:1 347
Ron’s injection on a Victor Jr. tuned & flowed for methanol
Mid sized mechanical roller
1 3/4 - 1 7/8 step headers
Power glide
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SBF Alky timing and plugs  Empty Re: SBF Alky timing and plugs

Post  rmcomprandy January 25th 2024, 11:59 pm

dfree383 wrote:Where’s a good place to start on a SBF for timing and plugs?

Z304 heads
14:1 347
Ron’s injection on a Victor Jr. tuned & flowed for methanol
Mid sized mechanical roller
1 3/4 - 1 7/8 step headers
Power glide

The particular fuel volatility has a lot to do with it.
With alcohol, to much timing does not seem to hurt much but, with that head, 30 degrees is a good starting place.
Running up to 18% rich doesn't seem to hurt any power either but, oil dilution and spark plug fouling are the downfalls.
NGK "BKR8EIX - 2668" work well with 14/1 compression ratio.

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SBF Alky timing and plugs  Empty Re: SBF Alky timing and plugs

Post  fordmonsta January 26th 2024, 9:53 pm

on my 347, 13:1 with victor jr heads and intake, toilet bowl, i ran best at 32 degrees locked out. Ran a Ar3933 autolite plug, but have gotten away from autolites, ngk 5238 is the cross reference that i run now.

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