Originally Posted by Rick
You really need a dyno or rolling road to map with the software
Ait temp sensor is supplied in the loom, for fitment in air filter or boost hose.
Thanks for the info
I'd map it on the road using my wideband lambda gear, like i do my existing stuff. I can't quite see how a road car will map well with out a TPS. There are far different fuelling and advane requirements at 10psi part throttle than 10psi full throttle. Can u shed any light on this?
How does the wideband work? Is it closed loop? Can it revert to the map after certain loads/speeds? Also, does it hunt for lambda 1, or can u set it different target afr depending on load?
Rick.
Hi Rick
As I mentioned, the software is designed around mapping on dyno or r/road with it's mode of operation, so it's difficult to map on the road.
You could use WB lambda for fine tweaks to the fueling, e.g the very best cruise economy, or checking the full power afr's, but how would you tune for part load boost at 5000 rpm? How do you hold the car under load at that rpm for any appreciable time to allow you to make accurate adjustments.
The same goes for the ignition advance. How would you hold peak torque for any time on the road? say 5000 rpm full boost. Or even map the ignition points as the boost spools up at say between 2800 and 3400 - on the road? Please advise on your method for mapping a car from scratch, and building a full map.
The Gotech system maps really well with only a map sensor - you can run TPS for throttle angle feedback, but you dont need to. The main reason for this being that you do not worry about the throttle %, only the manifold pressure, as the system maps on a huge Pressure v RPM map with a turbo engine in mode 4.
On a Nat Aspirated motor you would have different advance and fueling at say 4000rpm part throttle cruise, than you would at 4000rpm full throttle, this is due to the cylinder filling - the speed that the mixture in the chamber burns, varies with the amount of compression that the charge is under.
So - at a small throttle opening @ 4000rpm rpm, the cylinder will only partially fill, compared to wide-open throttle at the same rpm. It follows that you need different ignition timing for the same engine speed - based on engine load.
With a turbo motor, you would map for RPM x Load (boost pressure+vaccum)
But - 10 psi positive boost is 10 psi ! - So, cylinder filling will be equal if at part throttle or full load. Hence you only need a map sensor to get an accurate map.
Hope this shed some light
WideBand will work 0-1v or 0-5 in the software.
It runs closed loop - switchable. So you have the option on just using it for logging (monitoring) afr if you wish
It will revert bact to the main map at any load point you choose 0-32
You can set what rpm point you want it to switch on
You can set the target AFR
You can set the amount of millisecond correction allowed above/below the default base map
You can set the Response time (ramp) for the ecu to respond to millivolt changes from the sensor.
Phew - that was a long post.
Thanks for the interest Rick
Andrew