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rtbrjason

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About rtbrjason

  • Birthday 02/19/1977

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  • Location
    Rochester, NY
  • Car
    08 DGM Spec B - 16g E85 345whp/370whtq
  • Occupation
    Business Process Outsourcing

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  1. On the topic of cutting the pressure sensor out, has anyone tried just wiring in a gm map sensor in place of the OEM sensor?
  2. Definitely interested in a better TMIC option and loving the idea for an extra bung for IAT or even meth for those using it.. Some of us have no interest in a FMIC but still want to be able flow enough to cover all the standard LGT turbo upgrades (BNR) on E85.. I'm using an IPR right now and it's a real pos.. It needs to come in cheaper than the PW though..
  3. I disagree.. If you're running an aggressive stage 2 map/setup the 16g won't be a huge upgrade in performance. I definitely feel the additional power between 5200 and 6600, but it's not a huge increase and I lost a bit down low as well. I'm regretting not going bigger.
  4. Got one recently. He charges $750 and $35 to ship. No more core exchange business.
  5. I believe you can just loosen the collar on the turbo, bolt up the TMIC and then tighten the turbo collar back down. Tightening the TMIC down with the collar loosened should slightly clock the turbo into place. I don't have first hand experience with that but read it elsewhere in this forum while preparing to do my own 16g install. I didn't have any issues though and I'm running the IPR TMIC (Perrin knockoff).
  6. Are you using Tactrix or Accessport?
  7. Are you pro-tuned? Is it AP or ECUFlash?
  8. I don't think harmonics is specifically the issue. Google "water hammer" or "fluid hammer" for a better idea of what people seem to think is happening/are solving for with this mod. (http://en.wikipedia.org/wiki/Water_hammer) I certainly had the stutter when stock and even after "stage 1 and 2" tuning. I was able to fix it with a mix of tuning the engine load comp (MP) table, closed loop fuel comp, and timing. In the case of timing, I believe the biggest change that impacted this was the removal of cruise/non cruise timing. I've had no stumbling at all since getting that all dialed in. I did this mod anyway since many people on various forums were mentioning that the engine load comp table could be zero'd and some of the strange maf scaling issues may go away. I've not really found that to be the case and provided some data in the other thread on this that is going right now. After zeroing the comp table and tweaking the maf a bit, I found I still needed to adjust the engine load table and the overall shape of it was very similar to what I had before zero'ing it and doing this mod. This makes sense to me since any particular range (30g/s for instance) is going to require different fueling if you're doing 40 mph in 4th gear vs say 75mph in 6th. These differences in fueling are minor and certainly well within tolerance for the ecu's ability to adjust, but since we all want our long term fuel trims to be close to 0 it's worth tuning this table. Most people using the stock table should rescale the rpms to cover the full range of closed loop. For me that is about 800 to 4000 rpm. One thing I have noticed is considerably less knock sum increments in the 2700-3200 rpm range where I had constant issues with knock at 1.1-1.3 load while mildly accelerating on the highway. I never believed this was real knock but it seems to be completely gone whereas prior to this mod I could make knock sum increment every time I hit 2700 rpm and 1.3 load.
  9. Agreed. I have one mounted where the spare tire was in styrofoam. I just put it to sleep and wake it with a Logitech Dinovo mini. It's wired to the stock screen for display (no touch), wired to the Tactrix via usb. Wired for sound and power to the center console. One usb port up front for logging to a flash drive or charging my daughters iPhone. All under carpet and properly run. It's been in there for over 3 years through extreme heat and cold and I've never had to think about it. I really only use it for obsessive data logging and gauge display. It shows 12 gauges very cleanly on the oem nav screen. It's one of the first dual core Gateway's that I used to use for work. The stock screen was mostly shot when I installed it in the car but with the easy power management, bluetooth, 4 usb ports etc it was the perfect choice. Haven't ever had to replace any hardware in it and I pretty much use it every time I drive the car and it's always just worked.
  10. All my knock in this cell is happening in Open Loop where no af corrections are taking place. Also I spent probably over a year intermittently dialing in my maf/mrp and feel confident that they're both very close. I've had no real problems dealing with any other knock events with some minor timing reduction and or added fuel but have left this on the back burner. The car does run 100% smooth in the cruise regions as well as WOT and this one cell is essentially my only problem area. I do get occasional other knock but as you can see from my knock counts it's really clean and the 1.3 @ 2800 rpm cell is the only one causing the issue. I'm finally looking into it now since I don't really want my FLKC disabled below 1.38 load. For a while I was feeling like this was real knock, due to catless dp, tmic and maybe intake allowing for higher than normal loads in these lower rpm regions. When I had considerably more timing here I did see more knock and knock in 4th and 5th gears as opposed to just 6th. At this point, I'm again unsure as to whether this is some bit of noise at that exact spot or real knock. I have removed considerable timing in revisions of 1-2 degrees at a time. Stock was 24* on the non cruise map and I'm at about 16 - 18 now. I've added fuel to make that area run at 13.5:1 in open and closed loop. Curious what other self tuners would be doing at this point. I think NSFW will tell me to make det cans. I think LBGT will tell me to leave FLKC disabled below 1.3 and call it a day and/or buy a GTR. I'm hoping others will chime in but I will prob look into diy det cans.
  11. Just to follow up, I pulled 3-4 degrees from the trouble area and am still seeing the same thing. At this point I feel I'm running too little timing there as the car doesn't accelerate smoothly in this region now. IAM is still dropping but again only at 2800 rpm and 1.3 load. The cells all around that seem to be fine even when running considerably higher timing in the past.. romraiderlog_20110816_104513.csv Learning View_A2TB001L_2011-08-16 11 00 59.csv
  12. Here is the knock I've referred to in the past. I'm not sure if I should continue to address it or count it as noise. It only comes in around 1.3 load and 2800 rpm and pretty much only in 6th gear. If I leave FLKC range load under 1.35 or so, this is what happens. IAM drops, and it will continue to knock even with IAM being .5 and other timing being pulled on what I think is already low timing. I've pulled a bunch out of this area already and have richened my open and closed loop fuel tables to run low 13:1 fueling.. The table attached are my knock events from a 2mb data log (knock counts on the top and data points on bottom). The CSV is a trimmed down version of the same log showing the problem areas. LV was pulled about 20 mins of driving after intial IAM drop. Learning View_A2TB001L_2011-08-14 16 24 47.csv romraiderlog_20110814_121011.csv
  13. From these logs it looks like you need to remove a bit of timing at 4200 rpm around 1.8 to 2.2 load or so. Have you tried pulling any timing from that area yet?
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