I see a very few posts on this and this is one area I need some help on.......
I have been of the mindset..... leaner AFR during spoolup..... higher timing...... makes for hotter EGT's....which in theory... should help to spoolup faster.
Let's assume for the sake of this discussion that we have no pre-turbo exhaust leaks......
What timing do you need from say 100 kPa up to 200 kPa?
What AFR target?
Looking at the datalog from one of our recent track outings.....What we have now isn't working.
AFR target currently is around 13.2:1 at 100 kpa...... and 12.8 by 10.2 psi (171 kPa). Timing target is 36° @ 100 kPa and 31° @ 171 kPa.
This is a pig to spoolup.....once up on boost... it works pretty good.... it just takes way to long to get there....
Converter is a 9-1/2" PTC non-lockup.... stall is around 4300 @ 10 psi........
Some posts talk about retarding timing and adding a bunch of fuel..... but apparently.... the thought process is that only works good on a clutch car.....
I have been of the mindset..... leaner AFR during spoolup..... higher timing...... makes for hotter EGT's....which in theory... should help to spoolup faster.
Let's assume for the sake of this discussion that we have no pre-turbo exhaust leaks......
What timing do you need from say 100 kPa up to 200 kPa?
What AFR target?
Looking at the datalog from one of our recent track outings.....What we have now isn't working.
AFR target currently is around 13.2:1 at 100 kpa...... and 12.8 by 10.2 psi (171 kPa). Timing target is 36° @ 100 kPa and 31° @ 171 kPa.
This is a pig to spoolup.....once up on boost... it works pretty good.... it just takes way to long to get there....
Converter is a 9-1/2" PTC non-lockup.... stall is around 4300 @ 10 psi........
Some posts talk about retarding timing and adding a bunch of fuel..... but apparently.... the thought process is that only works good on a clutch car.....
Never been that high usually stay around high 20s to low 30s... depending on what the track will hold.
