8BA Dwell

[russcc]

Stock 8RT. The books says 58-63 degrees of dwell. I am getting about 48 degrees at idle with about a .015 to .016 point gap. Initial timing with the vac plugged is set with the pointer on the raised dot on the crankshaft pulley, What's up ? Dwell/Tach is an old timer. Thank you.

[V8 Bob]

Originally Posted by russcc

Stock 8RT. The books says 58-63 degrees of dwell. I am getting about 48 degrees at idle with about a .015 to .016 point gap. Initial timing with the vac plugged is set with the pointer on the raised dot on the crankshaft pulley, What's up ? Dwell/Tach is an old timer. Thank you.

If you re-read the book, that '48-'53 8BA spec is in percent, not degrees. 58-63 percent of 45 degrees (1/8th of 360 distributor rotation) equals 26.1-28.3 degrees, or 27 target degrees dwell, the spec most single point Ford V8s used up through the early '70s. FYI, the raised dot on the 8BA crank pulley is 2 degrees BTDC.

[BUBBAS IGNITION]

Originally Posted by v8 bob

if you re-read the book, that 8ba spec is in percent, not degrees. 58-63 percent of 45 degrees (1/8th of 360 distributor rotation) equals 26.1-28.3 degrees, or 27 target degrees dwell, the spec most single point ford v8s used up through the early '70s. Fyi, the raised dot on the 8ba crank pulley is 2 degrees btdc.

yep CORRECT........

[tubman]

Bubba,

Notice he said "stock 8RT". Your answer might be a little misleading.

[BUBBAS IGNITION]

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Originally Posted by tubman

Bubba,

Notice he said "stock 8RT". Your answer might be a little misleading.

tHANKS I WAS THINKING DUAL POINTS , I FIXED IT....