FYI: Close gap on TR6, ran lean
FYI: Close gap on TR6, ran lean Yup.. had my VE about perfect except for some random spark blowout, so I fixed the blowout.
TR6's gapped 35
well, I gapped them to 28, and I went to running rich at idle and LEAN LEAN LEAN in boost.
Spark blowout is GONE... engine is now running like it should just LEAN.. one or two VE adjustments later and its running better than ever.
Just thought I'd drop this out incase someone was having SPARK BLOWOUT issues...
TR6's gapped 35
well, I gapped them to 28, and I went to running rich at idle and LEAN LEAN LEAN in boost.
Spark blowout is GONE... engine is now running like it should just LEAN.. one or two VE adjustments later and its running better than ever.
Just thought I'd drop this out incase someone was having SPARK BLOWOUT issues...
When I forgot to plug in one of my coils my wideband showed really lean. The guys on the EfiLive forum told me that it would show lean because no ignition would mean all the oxygen is still there unconsumed and that is what o2 sensors look at.
Teching In
Joined: May 2004
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correct misfires show lean due to unused oxygen in the exhaust.
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From: So.Cal.
Yes, there is a difference between raw unburnt fuel (oxygen has not been consumed) and a rich burn (all the oxygen has been consumed and some fuel remains unburnt because there is no oxygen remaining)...
wideband measured lambda (which is defined to be the remaining oxygen proportion).
wideband measured lambda (which is defined to be the remaining oxygen proportion).
blow out is not as consistent as the rev limiter, not as fast at coming in and out. you might blow a few sparks out and some might light. kind of like a quick temporary bog
Last edited by unclebens; Sep 28, 2011 at 09:19 AM.
First part of advise is to get rid of those TR6 plugs... Put some NGK 3346 (BR7EF) plugs in it and I would bet it run's even smoother! Non-projected will help with blow out quite a bit and not act like a glow plug in the chamber when cylinder pressure get's high.
Don't know what the minimum is, but the less kernel energy
the less complete the burn. You have basically a fixed coil
current, gap is voltage hence spark power in the hole. "As
much gap as doesn't blow out" (or failure to jump the gap
at max cylinder pressure) is the best you can do and it goes
downhill from there.
Played any with increasing dwell (volt-seconds, equals
current)?
the less complete the burn. You have basically a fixed coil
current, gap is voltage hence spark power in the hole. "As
much gap as doesn't blow out" (or failure to jump the gap
at max cylinder pressure) is the best you can do and it goes
downhill from there.
Played any with increasing dwell (volt-seconds, equals
current)?
Different world I know, but in the import world at high boost it is not uncommon to gap down the plugs to a 26-28. Some guys even go crazy with it and will go down around 22 for 35+ psi.
