Adaptronic Variable injection timing
#1
Variable injection timing
I was looking at a friends map and he has variable injection timing selected and populated with values. Who here uses Injection Timing and why? Adaptronic web site suggest better throttle response and better leaner idle. Mine is horrible but I thought I just need to set Transient throttle "Predictable map" settings. Is there any benefits to using variable injection timing that anyone has found and how does one set this up?
thanks,
Ian
thanks,
Ian
#2
rotorhead
iTrader: (3)
https://www.rx7club.com/megasquirt-f...ement-1103949/
read page 10 to 11 for some background on injection timing.
read page 10 to 11 for some background on injection timing.
#3
https://www.rx7club.com/megasquirt-f...ement-1103949/
read page 10 to 11 for some background on injection timing.
read page 10 to 11 for some background on injection timing.
thanks again
#4
rotorhead
iTrader: (3)
It may be a little hard to conceptualize how the timing is calculated (start vs end timing vs duration, and how it relates to port timing).
Injection timing is hard to tune on the street. It really needs a basic inertia dyno at minimum so you can at least try adjusting at WOT. In that post I basically recommend to the OP to see if he can lean out his idle more with different end of injection timing.
Injection timing is hard to tune on the street. It really needs a basic inertia dyno at minimum so you can at least try adjusting at WOT. In that post I basically recommend to the OP to see if he can lean out his idle more with different end of injection timing.
#5
It may be a little hard to conceptualize how the timing is calculated (start vs end timing vs duration, and how it relates to port timing).
Injection timing is hard to tune on the street. It really needs a basic inertia dyno at minimum so you can at least try adjusting at WOT. In that post I basically recommend to the OP to see if he can lean out his idle more with different end of injection timing.
Injection timing is hard to tune on the street. It really needs a basic inertia dyno at minimum so you can at least try adjusting at WOT. In that post I basically recommend to the OP to see if he can lean out his idle more with different end of injection timing.
#6
rotorhead
iTrader: (3)
Generally speaking it's not a big **** for performance. You really have to determine the sensitivity of the engine to it on a case by case basis, because everybody has different port timing and injectors.
You really need an emissions analyzer to get a better idea of what's going on. HC correlates to unburned fuel from fuel sticking in the port. The CO and O2 correlate to how well the engine is mixing air and fuel.
You really need an emissions analyzer to get a better idea of what's going on. HC correlates to unburned fuel from fuel sticking in the port. The CO and O2 correlate to how well the engine is mixing air and fuel.
#7
Rotary Enthusiast
iTrader: (1)
Checking back to see if anyone has had time to mess with this over the past few years. I'm running a Universal Select 440d and using WARI. I know it doesn't matter all that much at high loads, but I'd like to smooth out the off-throttle and idle response of the motor and maybe lean it out a bit, but I don't know where to start on calculating the correct values. With the values set to 0 (or the feature disabled), when are the injectors firing? What direction does positive vs negative values move the firing? It would be nice if there was at least a paragraph about it in the user manual.
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#8
Banned. I got OWNED!!!
All of this is covered on the Haltech forum.
Last edited by RGHTBrainDesign; 07-16-19 at 07:21 PM.
#10
Banned. I got OWNED!!!
#11
Rotary Enthusiast
I tune this till the engine gets richer. 230 degrees at low rpm was my sweet spot but my injectors are way upstream.
This is something I want to mess with next time on on the Dyno. Probably October, but I'll report back what I see.
This is something I want to mess with next time on on the Dyno. Probably October, but I'll report back what I see.
#13
OG Member
I read or saw a video from adaptronic where andy tried to play with this on his rotary miata. They played with it alot and never got any measurable gains from it and set it back to zero. Think it makes a bigger difference on piston engines with the injectors close to the intake valve or maybe fd or gslse where the injectors in the center iron.
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brycehenley
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05-20-16 01:34 AM