idle timing with Holley HP efi
03-24-2021, 11:17 AM
#21
03-24-2021, 12:15 PM
#22
Registered
I disable the Timing control also , Bring idle timing down to about 10-15*. Open throttle blade so IAC is Barely open ( 5-10ish Counts )
Make sure you do a TPS reset ! Holley wont kick in the idle till the TPS says 0 .
Then in the Timing Table , say if you idle at 900 rpm, in the break points below say 750-800 rpm , Ramp up the timing to 30ish.
That way when you pop it in gear and the rpm drops , the lower rpm timing kicks it back up to your Target Idle Cells ,
Tuning your optimum AFR at Idle is a bit of a guess , that low of exhaust flow will actually give you a false reading.
I just try to find what it likes by idling around the water in gear and moving the fuel table up and down in the idle cells .
Till I get it good and clean .
Also make sure you dont have any fuel adders messing with your tables at Idle.
Make sure you do a TPS reset ! Holley wont kick in the idle till the TPS says 0 .
Then in the Timing Table , say if you idle at 900 rpm, in the break points below say 750-800 rpm , Ramp up the timing to 30ish.
That way when you pop it in gear and the rpm drops , the lower rpm timing kicks it back up to your Target Idle Cells ,
Tuning your optimum AFR at Idle is a bit of a guess , that low of exhaust flow will actually give you a false reading.
I just try to find what it likes by idling around the water in gear and moving the fuel table up and down in the idle cells .
Till I get it good and clean .
Also make sure you dont have any fuel adders messing with your tables at Idle.
The following users liked this post:
Panther (03-25-2021)
03-24-2021, 12:22 PM
#23
I disable the Timing control also , Bring idle timing down to about 10-15*. Open throttle blade so IAC is Barely open ( 5-10ish Counts )
Make sure you do a TPS reset ! Holley wont kick in the idle till the TPS says 0 .
Then in the Timing Table , say if you idle at 900 rpm, in the break points below say 750-800 rpm , Ramp up the timing to 30ish.
That way when you pop it in gear and the rpm drops , the lower rpm timing kicks it back up to your Target Idle Cells ,
Tuning your optimum AFR at Idle is a bit of a guess , that low of exhaust flow will actually give you a false reading.
I just try to find what it likes by idling around the water in gear and moving the fuel table up and down in the idle cells .
Till I get it good and clean .
Also make sure you dont have any fuel adders messing with your tables at Idle.
Make sure you do a TPS reset ! Holley wont kick in the idle till the TPS says 0 .
Then in the Timing Table , say if you idle at 900 rpm, in the break points below say 750-800 rpm , Ramp up the timing to 30ish.
That way when you pop it in gear and the rpm drops , the lower rpm timing kicks it back up to your Target Idle Cells ,
Tuning your optimum AFR at Idle is a bit of a guess , that low of exhaust flow will actually give you a false reading.
I just try to find what it likes by idling around the water in gear and moving the fuel table up and down in the idle cells .
Till I get it good and clean .
Also make sure you dont have any fuel adders messing with your tables at Idle.
Last edited by Cerberus66; 03-24-2021 at 01:04 PM.
03-24-2021, 01:37 PM
#24
Registered
I have the Parked at about 90% till it hits 60*F then ramps down to 65% @ 100*F .
Hold Position is about 30% . You can play with your settings , this was on a 572 with a Whipple.
The Throttle body injection is a bigger ***** to get to idle good.
Hold Position is about 30% . You can play with your settings , this was on a 572 with a Whipple.
The Throttle body injection is a bigger ***** to get to idle good.
03-24-2021, 01:40 PM
#25
Do you suffer from prop shock? what prop etc are you using and what boat.
03-24-2021, 03:20 PM
#27
Registered
03-24-2021, 03:53 PM
#28
