High throttle miss

[Texasdoc]

My Cam card doesn't list advertised timing events, only .050. Using the second tab of the program, it calculates the timing events based on .050 numbers.

So, my dynamic compression on Pat Kelley's program is 7.427:1.

[blykins]

Originally Posted by Texasdoc

My Cam card doesn't list advertised timing events, only .050.

I've got Gross valve lift, valve duration @ .006, valve duration at .050, valve timing at .050, lobe lift, and lobe separation.

Edit: Hang on, the second part of the program looks like it will calculate the advertised closing based on the advertised numbers and centerline/separation numbers....

Duration at .006" is advertised duration for a hydraulic cam. You always use advertised duration when calculating DCR.

[Texasdoc]

Originally Posted by blykins

Duration at .006" is advertised duration for a hydraulic cam. You always use advertised duration when calculating DCR.

Yes, but the program was asking for advertised timing, which is not listed on the card. However, on the second tab of the program, you can put in the advertised duration, intake centerline, and lobe separation, and it will give you advertised timing.

[blykins]

The advertised duration *is* on the card. It's the duration at .006".

If you're using pat Kelleys program, you would input the durations at .006", the LSA, and the ICL.

[Gaz64]

After watching your video many times, I can't see the misfire being anything else other than an intermittent ignition misfire.

It occurs a various rpms and loads.

I had a set of Autolites in mine a few years ago, went hard for 300 km, then had intermittent miss, one spark plug faulty.

Generally the mixtures are too rich, have you got any photos of the spark plugs when they were out last?

Gary