Spica to carbs_cams timing

940 Views 2 Replies 2 Participants Last post by ratcat, Nov 26, 2007

ratcat

Discussion Starter · Nov 25, 2007

Hello,
I'm newbie on this great forum saying hello from Poland. I need your opinion please.
I cut out Spica from my Spider '75 and I fixed DellOrto carbs. The carbs are completely restored, syncronized and adjusted. It is still problem with too high gas mileage; 12 l/100 km.
Should I change cams timing ? Any difference with cams timing adjustment between Spica and carburetors ?
Ratcat

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alfaparticle

· #2 · Nov 25, 2007

Spica cams do not work well with carbs. The standard European cams 105480320001 are much better. The factory setting for these is 99.5 degree lobe senters.

The US '75 Spiders have timing marks at 114 degrees. If you simply re-time your cams to 102 degrees you should see an improvement.

Ed Prytherch
79 Spider
2 x 88 Milano Verde's

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ratcat

Discussion Starter · #3 · Nov 26, 2007

alfaparticle said:
Spica cams do not work well with carbs. The standard European cams 105480320001 are much better. The factory setting for these is 99.5 degree lobe senters.

The US '75 Spiders have timing marks at 114 degrees. If you simply re-time your cams to 102 degrees you should see an improvement.

Ed Prytherch
79 Spider
2 x 88 Milano Verde's

Thank you for info.
Should I adjust ignition distributor to 9 degrees in that case ?

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