So I am wondering what kind of ignition timing everyone is running in their n/a's...


12a, 13b or 20b?
Type of igntion (distirbutor, stand alone ECU...)
Type of port (street port, bridge port, pp...etc)
Type of intake (Stock 4bbl, stock S4/S5, ITA/ITB, custom injection...)
Type of exhaust (short tube header, long tube header.. single , dual... 2.5", 3")

 

I usually start a baseline of 10 degrees at 1500rpms, and go linear up to 28 degrees @ 8000. Then work it up or down on the dyno to find the sweet spots.

 

i'd like to see some different numbers, not necessarily how to tune it on the dyno. What are some of the base timing numbers, total advance, trailing/leading split would be awesome. i'm having a lot of hesitation and a strong desire to die at any rpm under 4k, but above that it screams like a banshee. Sounds like i need to ad some timing, but i want some numbers to get an idea from if i could. Plus i just thought it would be useful info on here.

 

I have an E production S5 with an agressive street port(SCCA legal). I use an early distributor with 2 MSD 6al's. My carb is a Weber 48 IDA bored to 51mm with 42mm chokes. Timing is set @ 25 degress for the leading and 15 degrees trailing at full advance. This is per the reccomendation from my engine builder Jesse Prather of Prather Racing.
Hope this helps!

 

if you are using a distributor, the advance numbers vary with the dustributor. the advance charts are all in the FSM's.

 

awesome, thank you! great help.

 

Last I knew because I haven't played with the RTek in a while, I had somewhere in the neighborhood of -5 deg at idle, 30ish (29 maybe) at full bore, nice transition across the board, and a 0ish (maybe 1-2) split. Changing the split didn't alter the running ability as much as I'd hoped, and I don't have an EGT probe, so I'm not screwing with the top end any more.

S5 13B, stock ports, stockish (holes) exhaust, and a screwed with PCV system...