Intake Cam Gear adjustment vs Distributor
#1
Intake Cam Gear adjustment vs Distributor
For those of you who degree cams or adjust cam gears on the dyno - How do you synchronize ignition timing with ECU if the intake cam gear is turned beyond the adjustment range of the distributor?
I degreed my cam centerlines to be -4* int/+4* exh. But with only -2/+2* of distributor adjustment I can't advance the distributor enough to sync the ECU at 16*. What’s the solution?
I degreed my cam centerlines to be -4* int/+4* exh. But with only -2/+2* of distributor adjustment I can't advance the distributor enough to sync the ECU at 16*. What’s the solution?
#7
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Re: Intake Cam Gear adjustment vs Distributor
That would be the best way imo. Alot of tuners just give the motor what it wants, and don't really worrie about the actual numbers. I've seen some tuners make intake cam adjustments and not even reset the timing at the dizzy. More ways then one to skin a cat ya know?
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#10
Re: Intake Cam Gear adjustment vs Distributor
The only possible way of mechanically setting the dizzy would be to elongate the holes further to allow enough range. Although I'm sure that isn't the answer you are looking for.
#13
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Re: Intake Cam Gear adjustment vs Distributor
Get what you can at the distributor and synch your base timing in your EMS software. If you can only get 10 degrees at your distributor, synch your EMS at 10, so everything else in the ignition maps will be correct. Gotta have the same reference point.
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Re: Intake Cam Gear adjustment vs Distributor
Sync timing is exactly that. If you can get to a certain number on the crank pulley then set that number in the tuning software. After that the timing maps will work as they should. Ie 14 crank set 14 in the sync field. Mine was just able to get 16 but i think this time around with head and block being touched ill have to set mine to 12-14 in the sync
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Sync timing is exactly that. If you can get to a certain number on the crank pulley then set that number in the tuning software. After that the timing maps will work as they should. Ie 14 crank set 14 in the sync field. Mine was just able to get 16 but i think this time around with head and kiblock being touched ill have to set mine to 12-14 in the sync
neptune and hondata are practically non existent in these parts
#20
Honda-Tech Member
Re: Intake Cam Gear adjustment vs Distributor
Going off memory here...
Lock ignition in Neptune (padlock icon)
Set your distributor to as close as you can to 16 degrees.
See what your ignition value is in Neptune...
Put this value as your base timing in Preferences/Main...
This should sync up your ecu to your distributor...
Im pretty sure this was how I did it setting up mine. Hit up HRTuning on here or his site. He responds rather quickly.
Lock ignition in Neptune (padlock icon)
Set your distributor to as close as you can to 16 degrees.
See what your ignition value is in Neptune...
Put this value as your base timing in Preferences/Main...
This should sync up your ecu to your distributor...
Im pretty sure this was how I did it setting up mine. Hit up HRTuning on here or his site. He responds rather quickly.
#22
Honda-Tech Member
Re: Intake Cam Gear adjustment vs Distributor
Just lock it at 14deg if that's the actual number you can get out of the dist.
Then do the rest of your timing maps from there.
Stock timing is 16 +/- 2deg, so you're still good.
Then do the rest of your timing maps from there.
Stock timing is 16 +/- 2deg, so you're still good.
#23
Re: Intake Cam Gear adjustment vs Distributor
Sigh, let me try to explain this again.
Intake cam set to -4* (cam centerline)
In Smanager, Set Timing at 16*
Advance the distributor to full, crank reads 14* with timing light.
Plan B. Go back to Set Timing, decrease value to 14*
(THIS RETARDS THE ECU TIMING OUTPUT BY -2)
Advance distributor to full, now crank reads 12* with timing light.
See the pattern? Changing the Set Timing value changes the actual ignition output.
If I can’t sync at 16 I won’t be able to sync at any number because it’s moving the target.
Don’t believe me? Try it for yourself.
Or look at the IGN display it will show the actual ignition output as you adjust the Set timing value.
It’s a flawed system.
Intake cam set to -4* (cam centerline)
In Smanager, Set Timing at 16*
Advance the distributor to full, crank reads 14* with timing light.
Plan B. Go back to Set Timing, decrease value to 14*
(THIS RETARDS THE ECU TIMING OUTPUT BY -2)
Advance distributor to full, now crank reads 12* with timing light.
See the pattern? Changing the Set Timing value changes the actual ignition output.
If I can’t sync at 16 I won’t be able to sync at any number because it’s moving the target.
Don’t believe me? Try it for yourself.
Or look at the IGN display it will show the actual ignition output as you adjust the Set timing value.
It’s a flawed system.