Seems its now common knowledge that cylinder 5 (and 2, to a lesser extent) is a problem for several people out there.
Running E60, 61% Meth w/CM10 nozzle, meowless downpipes, AMS IC, in 60 degree ambient temps, fresh walnut blasting, newer 1 step colder plugs (maybe 10k on them) gapped correctly....
Cylinder 5 almost always hits some 3-6 degree corrections, sometimes dropping to as low as 3.7 degrees from 13.5 (not all at once, but during the run), which tanks my avg. ignition.. things recover, avg. ignition drops to .9 ish, then it will hit again. Single pulls are less sensitive than multiple gear pulls, its far more likely to happen in a 2/3/4 pull vs. just a 2500rpm to 6000rpm 3rd gear pull, but it can happen in 3rd gear (much less though).
Are there any values in BavTech logging that can reveal what's going on? There are hundreds of values to log if you look.
- Is it EGT related?
- Knock values?
- AFR (I've seen bank 2 get .1-.3 points leaner preceeding a timing event)
- ???
It's obvious that timing is being pulled.. but perhaps knowing why its being pulled is a good first step to fixing it?
Do we have single turbos setups hitting cylinder 5 timing problems too?
Running E60, 61% Meth w/CM10 nozzle, meowless downpipes, AMS IC, in 60 degree ambient temps, fresh walnut blasting, newer 1 step colder plugs (maybe 10k on them) gapped correctly....
Cylinder 5 almost always hits some 3-6 degree corrections, sometimes dropping to as low as 3.7 degrees from 13.5 (not all at once, but during the run), which tanks my avg. ignition.. things recover, avg. ignition drops to .9 ish, then it will hit again. Single pulls are less sensitive than multiple gear pulls, its far more likely to happen in a 2/3/4 pull vs. just a 2500rpm to 6000rpm 3rd gear pull, but it can happen in 3rd gear (much less though).
Are there any values in BavTech logging that can reveal what's going on? There are hundreds of values to log if you look.
- Is it EGT related?
- Knock values?
- AFR (I've seen bank 2 get .1-.3 points leaner preceeding a timing event)
- ???
It's obvious that timing is being pulled.. but perhaps knowing why its being pulled is a good first step to fixing it?
Do we have single turbos setups hitting cylinder 5 timing problems too?