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| Joined: | 02-17-2015 |
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I ask because I’ve been running an increased static advance of 14*-16* on my 11* JH 25D distributor with vac retard disconnected. Carbs are Weber 40 DCOE 2 with 34 chokes. Cams are set to 110-110. Springs allow all in @ 2500 and I’ve installed a collar on the spring post to limit the total mechanical advance to 28*-30*.
This is the part that confuses me:
J-H Distrib
Mechanical ... 17.0° Max @ 2500 rpm
Static Adv. .... 10.0° BTDC ... 8.0° BTDC ... 12.0° BTDC ... 2.0° BTDC.
Total Adv ...... 27.0° .......... 25.0° ............ 29.0° .......... 17.0° (lame) Total
Spec ............ Stromberg ... Stromberg ..... Dellorto ....... Dellorto
.................... Pre-4803 ..... 4803-onward.. Pre-18900 ... 19800-onward
How can the Max all in Mechanical be 17.0* @ 2500 RPM if the distributor allows 22* crank advance?
Is there is a benefit to be gained by going beyond 30* or would I be venturing into dangerous territory? Is 32*-34* safe? 36*?
Regarding the Eclat distributor, if I ever do use it, I will modify it similarly – but simply out of curiosity -even though the Eclat dist doesn’t get full advance until 6500, the 14* mech advance would still allow more than 28* total advance with static set to anything greater than TDC.
Rick