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Thread: Revisiting spark advance to optimize ...NEED SMART EYEBALLS....

  1. #31
    Back to the Omnipresent! Spittybug's Avatar
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    Quote Originally Posted by FABombjoy View Post
    You really don't want to pull timing there unless you intentionally want a crackly exhaust note or to shoot fireballs.
    Thanks, I'll look at the tables. So leaving the advance during decel is actually preferred then? Just cut back fuel.....
    Owen
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  2. #32
    '82 T3 Turbo FABombjoy's Avatar
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    If youíre too lean youíll pop bang gurble. If youíre going to put any fuel in, you need enough so it doesnít lean misfire or itíll afterfire. Unless you want that - some people like the sound but itís too much for me

    Kjet does this pretty predictably, I assume more so if the decel valves are soldered shut. When I was running kjet turbo with the decel valves closed up I could goose the throttle and after fire all day long at idle.

    Launch control or anti lag will really demonstrate the effect of late timing!
    Luke S :: 10270 :: 82 Grey 5-Speed :: Single Watercooled T3 .60/.48 :: Borla Exhaust :: MSD Ignition :: MS3X Fully SFI Odd-fire EFI :: DevilsOwn Methanol Injection

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  3. #33
    Back to the Omnipresent! Spittybug's Avatar
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    No table switching in MS2e, just additive. I'll simply bake in the idle landing trough. This isn't far from the actual table I'm running on. I notice you have your centrifugal advance all in by 3000 RPM. No ill effects I trust? Most car guys say that is the magic number but I know our stock setup rode it out to 4000.

    How much can you dial the fuel back on decel without issue? I suppose if there is no fuel in there to speak of then there is no risk of knocking the engine. No ill effects of sparking with no fuel that I can think of.....

    I just picked up my new DMCH fuel pump setup today so I'll be installing that over the wet weekend here. I should be able to get some timing changes made after that and see if I can get this dialed in. The next brain pick will be on AE curves. I like to use pretty much 100% TPS, but getting the PW and duration just right is a challenge. I played with it a few years ago and somehow managed to get something very right; good head snapping acceleration (but I've since tinkered it away) - so I know it is achievable!
    Owen
    Tour the country and visit breweries through the eyes of our two puppy dogs. http://www.twobrewdogs.com
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  4. #34
    '82 T3 Turbo FABombjoy's Avatar
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    How about that, guess I do have a few degrees of timing in a little early. Seems to work and is probably still in the acceptable window of the Volvo curve.
    Luke S :: 10270 :: 82 Grey 5-Speed :: Single Watercooled T3 .60/.48 :: Borla Exhaust :: MSD Ignition :: MS3X Fully SFI Odd-fire EFI :: DevilsOwn Methanol Injection

    Console5.com - Game console parts, kits, games and more. [shop] [wiki] [RSS] [f] [t]

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