- Mon Jan 18, 2021 10:54 am
#47644
Hi all.
I've recenlty been playing around with Honda B-series motors... which is fun because their trigger system is noisy and i enjoy a challenge.
On the side i've been toying with fitting a speeduino 0.4 to a Honda D16y4 for a mate.
There have always been rumours that the Australian delivered D16y4 was unique in the sense that Honda put THE MOST BASIC of EFI systems on the engine!
Upon further investigation it appears to be the truth! The only form of triggering on the australian version is a 4 slot optical wheel on the camshaft.
The spark is dirstributed (by the distributor) and it appears that the ditributor gives 4 pulses per camshaft rotation. Based on RPM, intake air temps and load the ecu just controls timing by delaying or advancing the signal to the igniter (also inside the distributor along with the coil)
As a coil-on-plug kinda guy... It's not my cup of tea.. but I guess i works and there are plenty of D16y4's on Australian roads to prove it.
This is nothing like the B-series which have 3 trigger patterns on the same distributor shaft... anyway.. i digress
This ignition configuration should be easy to deal with on speeduino as I have nice square wave signals to trigger off.
This leads me onto the FUEL system:
The Australian D16y4 has "paired batch" injection... injectors 1 and 3 share a channel (and wires)... injectors 2 and 4 share a channel and wires..
My goal is to maintain the existing wiring right up to the OEM ECU plug...
Do you know if the Speeduino can handle this configuration? Could I run 2 injectors off one injector channel or would I likely overload the transistors?
If that's not an option Could I just link all the injector channels and run full batch on all 4 at once? (crude i know but it's not as though it hasnt been done on older cars)
Also, as i'm unfamiliar with batch injection as a whole... How does the ECU know when to fire the injectors? It's not like it's sequential with a "sync" signal... Does it just fire the injectors an evenly spaced amount based on the RPM signal?
I can't get my head around how it does the math wihtout a "Sync" signal...
I'd be happy with a basic solution to get the engine idling... then move on from there.
Your help on this matter would be appreciated. Mainly in how I would configure the Speeduino's settings to give me best chance of a first "fire up"
Cheers and thanks in advance!
John
I've recenlty been playing around with Honda B-series motors... which is fun because their trigger system is noisy and i enjoy a challenge.
On the side i've been toying with fitting a speeduino 0.4 to a Honda D16y4 for a mate.
There have always been rumours that the Australian delivered D16y4 was unique in the sense that Honda put THE MOST BASIC of EFI systems on the engine!
Upon further investigation it appears to be the truth! The only form of triggering on the australian version is a 4 slot optical wheel on the camshaft.
The spark is dirstributed (by the distributor) and it appears that the ditributor gives 4 pulses per camshaft rotation. Based on RPM, intake air temps and load the ecu just controls timing by delaying or advancing the signal to the igniter (also inside the distributor along with the coil)
As a coil-on-plug kinda guy... It's not my cup of tea.. but I guess i works and there are plenty of D16y4's on Australian roads to prove it.
This is nothing like the B-series which have 3 trigger patterns on the same distributor shaft... anyway.. i digress
This ignition configuration should be easy to deal with on speeduino as I have nice square wave signals to trigger off.
This leads me onto the FUEL system:
The Australian D16y4 has "paired batch" injection... injectors 1 and 3 share a channel (and wires)... injectors 2 and 4 share a channel and wires..
My goal is to maintain the existing wiring right up to the OEM ECU plug...
Do you know if the Speeduino can handle this configuration? Could I run 2 injectors off one injector channel or would I likely overload the transistors?
If that's not an option Could I just link all the injector channels and run full batch on all 4 at once? (crude i know but it's not as though it hasnt been done on older cars)
Also, as i'm unfamiliar with batch injection as a whole... How does the ECU know when to fire the injectors? It's not like it's sequential with a "sync" signal... Does it just fire the injectors an evenly spaced amount based on the RPM signal?
I can't get my head around how it does the math wihtout a "Sync" signal...
I'd be happy with a basic solution to get the engine idling... then move on from there.
Your help on this matter would be appreciated. Mainly in how I would configure the Speeduino's settings to give me best chance of a first "fire up"
Cheers and thanks in advance!
John