o.k, i had this thing perculating as good as it could last year and now BLAH!!
i'm running a 340 and recently had some eddie heads and a lumpier hughes cam, i don't remember the exact cam #'s but somewhere like this 543@50 and 548@50 and i think in the 260 duration range but i would have to double check these #'s.
i have a 670 street avenger and after driving on the highway i pulled the plugs and they were white, white , white so we went up 3 size, no change in colour so we went up another 3 and still no change finally got mad and went up 6 sizes and got it to run ''blubury'' and got some dark brown and black on plugs. i also can't run any timing, i'm down to 13 initial and 30 total and this thing rattles like it has marbles in it [mostly under 4000 rpm] i just fueled up and i'm starting to suspect bad gas. i know bad gas will make it detonate but will it make plugs white? anytime ive seen where a carb is that far out it's another issue. is there something else i can check before siphoning my tank, what could i be overlooking. sorry for the long winded message, i have more info if needed, 10.5 compression, running 7 in-hg.
