So say you took your n/a car in for tuning at 2 levels

This starts from a Phearable base map to suit my b18c7, have had it tuned twice

a) stock motor but usual boltons (from std ecu)
b) set of aftermarket cams

would you expect that ignition timing maps would have been changed?
I figured that even with a good base map, you'd have at least have made some changes, especially after the cams?

Can post up screenshots of tables if it helps?

Just trying to get an understanding if tuner has just been lazy and not bothered, or if its not something normally touched

 

So what your saying is that you had the vehicle dyno tuned & the tuner used a Phearable.net basemap to tune off of & didn't modify the ignition tables from the basemap?

It is very possible the basemap was spot on & ignition timing was exactly where it needed to be.

 

yes didnt modify the timing - and I agree the phearable tune was very good and only needed basic fuelling changes to suit.

My main concern is that after a change in cams, there was still no timing changes.
With a drop in dynamic compression, change in vtec point and fair bit bigger lobes i would have expected this?

 

I have tuned some cars w/Phearable base maps and they were very good as is.Surprisingly good, as in two hours of dyno time net gains were 3-4 peak. If your tuner is familiar with your cam set up he may know or predict with reasonable certainty the needed timing and save you considerable money in tuning expense.

 

Did he even try to adjust the ignition maps? Assuming you we're present.

 

Yeah as mentioned the phearable map was very close to perfect.

Unfortunately i wasnt present, and considering every value in the maps are exactly the same as original i doubt it.

Going to move to a different tuner and be present I think

 

It's not possible to end up with the exact same ignition values on a different cam if it's properly tuned.

Any time your air and fuel volume changes, peak combustion will occur at a different phase of the stroke. In order to optimize usable power from that stroke, the ignition point MUST be altered.

Unless he never tuned it to begin with and it was miraculously on point when you swapped the cam, all he did was adjust the fuel maps and your tune probably isn't safe enough to drive on.

 

wonder if he knows who you are?? haha

 

:-)

Glad to hear that :-)