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    Results 1 to 2 of 2
    1. #1
      Join Date
      Jul 2013
      Posts
      53
      Country Flag: United States

      tune sanity check

      I'm just looking for a basic sanity check here, I have been dealing with tuning issues that have been anything but and want a clear perspective.

      First off, probably should elaborate a bit on my combo. I have an L03 with ported 416es on it (done myself, no flow #s) felpro Blues, a ported TPI base/plenum with stock runners and a set of Cobra 39s. Exhaust is shorty headers into 2.25 that merges into a single 3" exhaust.I'm running Megasquirt II for my ECU doing fuel and spark. Cam is a 91 Y-body/"good" F-body cam.



      I've had issues with everything from using a Cold start injector TPI TB on a non cold start injector plenum to burnt plug wires to bad injectors. FP is ~43 PSI and pulls down to ~34 PSI at idle, which comes to 17-19" HG idle vacuum which my ECU confirms. All the plugs are even, and white now. As in the porcelian is brand new looking after 30-40 mins run and a few pulls around the block. I do not have a WB hooked up currently but the plugs tell a ton without even going that far.

      Ultimately my question boils down to this:
      At below 1500RPM and at the 30-35KPA cells I'm in the low-mid 60s for my VE. Does this even sound sane? It's about 15-20% more than the cells around it, I'm wondering if all the other issues I had are forcing me to add fuel because I wasn't burning it well before. Power drops off like a rock after I leave these cells (it won't go above 1700 or so) and it's really making me wonder if I have other issues still or if I just need to dump fuel into it till she's good.

      Pic of the plug. The porcelian looks like that all the way back. I was initially leery it may be that I was running Autolites, but at the same time I guess not. I stuck NGKs in there and I like them better if only because they are about 1/8 shorter which is awesome since my headers are tight around my plugs in a couple spots.



    2. #2
      Join Date
      Jun 2005
      Location
      Lynnwood Wa.
      Posts
      248
      Country Flag: United States
      First off, if you are running Megasquirt II, you need a wide band.
      I found these series of YouTube videos by Philip Ringwood very helpful to configure
      Megasquirt.

      http://www.youtube.com/user/ExtraEFI/videos?view=0
      Oliver Shultz
      It's OK to giggle and snicker. don't laugh and point


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