Prop removal questions... |
Post Reply | Page <1 456 |
Author | |
Blamey
Gold Member Joined: August-18-2015 Location: White Plains,NY Status: Offline Points: 631 |
Post Options
Thanks(0)
|
So is this something I can do myself or do I need somebody with experience? I'm always up for learning a new skill but prefer to avoid the ones when I could make it worse then when I started.
|
|
96 Super Sport
Previously: 95 Sport Nautique, 1980 Ski Supreme |
|
MrMcD
Grand Poobah Joined: January-28-2014 Location: Folsom, CA Status: Offline Points: 3734 |
Post Options
Thanks(0)
|
If your boat is fuel injected we need advice from those that have adjusted the Fuel Injected GT40 on how to do it. If it is carbureted changing timing is simple but you will need a timing light. A set back Timing light is best so you can check the timing at idle and at all the RPM ranges. It is also important to see your timing curve actuates very smoothly from idle to full advance.
|
|
Blamey
Gold Member Joined: August-18-2015 Location: White Plains,NY Status: Offline Points: 631 |
Post Options
Thanks(0)
|
I have a GT40.
|
|
96 Super Sport
Previously: 95 Sport Nautique, 1980 Ski Supreme |
|
gun-driver
Grand Poobah Joined: July-18-2008 Location: Pittsburgh, Pa Status: Offline Points: 4127 |
Post Options
Thanks(0)
|
You really can't adjust the total advance. Maybe by setting base timing a couple degrees heavy you may get more not sure if that would work. "The distributor has no centrical or vacuum advance since the ECA controls the spark timing. Other than setting base timing no distributor adjustments are required. |
|
lewy2001
Grand Poobah Joined: March-19-2008 Location: NSW Australia Status: Offline Points: 2234 |
Post Options
Thanks(1)
|
With the GT40 you can only set the static timing the rest of the time the GT40 ECM adjusts the timing depending on input from all other sensors it has a range of twenty odd degrees from memory that it adds to the static timing from the table in the ECM.
Base timing per manual is 5 deg BTDC with Spout disconnected and engine at operating temp. I have played around with this and actually have tried other settings up to 10 BTDC. I had mine set to 8 degrees with the GT40 ECM. Tried this setting on another GT40 at GL and could hear a slight ping so set it back to standard. The GT40 also has knock sensor that will retard timing if detected. |
|
If you're going through hell, keep going
89 Ski <a href="http://www.correctcraftfan.com/diaries/details.asp?ID=5685" ta |
|
tryathlete
Platinum Member Joined: April-19-2013 Location: Lake Villa, IL Status: Offline Points: 1797 |
Post Options
Thanks(0)
|
Thanks, Lewy. I wonder what sort of advance increase you'd be able to achieve on good premium fuel. I run Mobil ethanol free premium 93 octane. I'm not messing with it regardless as I don't see any performance issues with my GT40. I know I don't need 93 but it's the only ethanol free fuel near my home (if you consider 17 miles to be near). |
|
Blamey
Gold Member Joined: August-18-2015 Location: White Plains,NY Status: Offline Points: 631 |
Post Options
Thanks(0)
|
I have been inspired to look for my missing ponies. I have started a new thread here to discuss my adventure.
|
|
96 Super Sport
Previously: 95 Sport Nautique, 1980 Ski Supreme |
|
Post Reply | Page <1 456 |
Tweet
|
Forum Jump | Forum Permissions You cannot post new topics in this forum You cannot reply to topics in this forum You cannot delete your posts in this forum You cannot edit your posts in this forum You cannot create polls in this forum You cannot vote in polls in this forum |