
Next – How much “time†or how many degrees of advance is correct. This “time†is measured in crankshaft degrees and is the difference between when the plug fires and the explosion occurs to push the piston down the cylinder – producing the power stroke. We want this to happen just as the pistons reach the top of the compression stroke, but it takes time for the spark plug to ignite the fuel mixture. Let's start with a simple explanation of why we need spark advance and how much of it we want.įirst – When you hook up the timing light to the #1 spark plug wire and it flashes a light beam onto the timing tab, it’s showing you when the spark occurs, NOT when the ignition occurs and the explosion that starts to push the piston down the cylinder. But, some time and effort will be required. The cool thing about ignition timing is you can usually get a considerable performance increase for little or no money. You've got 16 degrees of advance between 750rpm and 3500rpm, over a span of 2750 rpm, but that does not necessarily mean the timing advances 1 degree every 172 rpm as the engine speed increasesĮntry-level racers and performance enthusiasts who are involved in Drag, Oval, or Street performance often have difficulty understanding spark advance. ID STRONGLY SUGGEST READING THESE THREADS and OTHER LINKS POSTED IN THIS THREAD ALSO (ID also point out that most of the (DIAL BACK) style timing lights have a deserved reputation for less than outstanding accuracy)

Your more or less correct but the "curve" needs to be checked carefully and graphed out to be 100% correct simply because the advance may or may not be consistent as the rpms increase. The curve timing is where the mark started to move and where it finished moving, correct?"

Add these to numbers together and I am at 30 degrees total. Then I raised the rpms to 3500 where the timing mark stopped moving and pressed the button to 16 degrees which brought back the mark to where the balancer mark is lined up with the tab at 14 BTDC.

I set my 350 SBC to 14 degrees BTDC at 750rpm, initial timing.
#Hoe many degrees of advance in ve beetle timing gun how to
I am trying to figure out how to use it properly and find out what my initial timing, total timing, and the timing curve. I have a new timing light like this one 8.
