Ok I'm new here and here's my question I bought a autometer 5 inch carbon fiber tachometer my question is on the back of it it has two calibration loops and it says if you have to clipped one wire for a four cylinder with a certain pulse i have a vw 1641 with electronic ignition with a bosch blue coil can anyone tell me how many pulse a vw four cylinder is and if you dont mind how do you wire it up thanks

Welcome to WB.

Do you have the model number of the tach?
You should be able to find out how to wire it up online by searching the model number and wiring

Here are a few wiring diagrams in pdf.
http://www.egauges.com/AM_Instr.asp#Gauges
Most of them on here say
4 Cylinder: Clip BROWN and ORANGE wire loops. Insulate with
electrical tape.

It's a autometer model 4899 carbon fiber with shift light it has a blue and brown wires and says for 4 cylinder 2 pulse per revolution to clip blue wire only and 4 cylinder with 1 pulse per revolution to clip both blue and brown but i have no clue as to how many pulse a vw has .Plus is the tach a good one and even worth the trouble on a buggy? thanks

Read this. they say 2
http://www.thesamba.com/vw/forum/viewto ... revolution

I would never pay $200+ for a tach in my buggy, but I’m cheap. I really don’t look at my tach when I’m climbing a hill. It is useful when tuning your carbs, setting timing, and if it has a recall to see what rpms you were when climbing. I bought a tach from Summit for $130 and it has rpm, volt, oil, and temp all in one gauge.

This is what I use
http://store.summitracing.com/partdetai ... toview=sku

Thanks for the find that helps me alot yeah i wouldnt pay what they want for a new one my buddy bought it for his duster and then didnt want it it's new in the box and getting it under $200 i looked online and they was like $315 i was like wow he has more money than sense haha yeah i got dual carbs only reason i want a tach is to help me tuning those suckers thanks again