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Type: Posts; User: JimMueller

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  1. Intake manifold with different runner lengths

    Will it be a problem to tune this manifold with OEM Gen3 PCMs?

    https://www.motortrend.com/reviews/performance-design-xs-ls-engine-intake-manifold-first-look/

    Email from their sales team:
    ---...
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    Shorter DB15 to OBD2 cable?

    It looks like the shortest cable HPTuners offers is 5ft. I'm trying to coil that cable up under my radio (in front of the center console) and the OBD2 connector is maybe 1' to the left of the center...
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    So you're recommending the Fuelab 52901? Any...

    So you're recommending the Fuelab 52901? Any concerns about it only mentioning compatibility with certain fuel pumps (I appear to have a Racetronix RXP342 in my kit)? That part number is uncannily...
  4. What type of anomalies should I expect when...

    What type of anomalies should I expect when driving the vehicle in this condition? What type of behaviors can I change to mitigate the situation until it is solved?
  5. The kit I purchased was intended for use with an...

    The kit I purchased was intended for use with an external FPR, so they intentionally excluded an internal FPR. They recommended the C5 FPR or an aftermarket FPR in conjenction with the pump kit....
  6. I reviewed all the search results in your link....

    I reviewed all the search results in your link. Does the 1998 PCM allow this tuning workaround?




    Obviously the 1998 fuel system is returnless; you commented in another thread... so it sounds...
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    I'm in the same boat on my 98 Camaro. What...

    I'm in the same boat on my 98 Camaro. What brand/PN of aftermarket regulator did you use?
  8. New external C5 FPR in '98 F-body, high fuel pressure whacking fuel trims

    Long story short, the metal tank in my '98 Camaro developed a small leak which we couldn't locate. Plus, the complete 255LPH fuel sender kit I bought from a vendor didn't include the plastic bucket,...
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    In this AFS123 sensor review (with photos), a...

    In this AFS123 sensor review (with photos), a person commented that he added aluminum foil to help them heat up better. Yay or Nay?
    ...
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    Getting a P0155 now, will check the harness and...

    Getting a P0155 now, will check the harness and sensors. What is the consensus on the best O2 sensors to use in the S1 positions? Delphi? GM? Regarding optimizing the sensor switching, still only...
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    1998 PCM reputation

    I've been wanting to get my spark tables optimized for awhile now. Not confident on the street due to knock sensors relocated to side of the block and not clear which logging math could interpolate...
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    Thanks, Ben. Here is what I know on the build so...

    Thanks, Ben. Here is what I know on the build so far:

    2002 Z06 with factory PCM
    468ci
    255/266 @.050 113+3 cam (my math says that's 35* of overlap at .050)
    11.8 compression
    Brodix LS7 heads...
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    How about the 255/266 @.050" 113+3 cam that's...

    How about the 255/266 @.050" 113+3 cam that's coming in it, any concerns there for idle/cruise behavior? By my math, that's about 35* of overlap at .050".
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    So a combination of this......

    So a combination of this...
    https://sdparts.com/i-24499835-nick-williams-112mm-electronic-drive-by-wire-throttle-body-for-gen-v-ltx.html

    ...and this?
    http://www.torquerush.com/x-link.html

    If...
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    Where would we find clear documentation on how to...

    Where would we find clear documentation on how to do it right? My understanding is that it needs to be an electronic TB, know of any larger than 103mm?
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    Tuning 468 LS7 in 02 Z06

    Hi All, a buddy is having his 468" LS7 shipped tomorrow. It'll go in an '02 Z06 with factory pcm. Engine builder says it deserves a 115mm TB, but his research indicates the biggest tb 'compatible'...
  17. Hi Greg, I did expect to re-tune but I didn't...

    Hi Greg,

    I did expect to re-tune but I didn't expect the deltas to be so large. I do tune both MAF & VE and did buy your 1st DVD. I just happened to start retuning with MAF to get an idea how far...
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    Do you have very detailed steps to complete this...

    Do you have very detailed steps to complete this process? Would it be premature to attempt to adjust idle/PT airflow based upon fuel trims prior to completing the airflow & zone adjustments?

    I...
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    * I loaded the tune from post #8, and that...

    * I loaded the tune from post #8, and that generated log "cl1_o2err_2-2"
    * I changed Prop Idle O2 Err to interpolate between 1 and 2, and that generated log "cl1_o2err_1-2"
    * I changed the Mode vs...
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    From the original post, actual modify dates on...

    From the original post, actual modify dates on the files:
    10/3/2021 7:42PM - "03oct2021_CL1.hpl"
    10/5/2021 1:47AM - "Blend_baseline_Oct03_2021.hpt"

    I found this additional calibration I...
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    The OLMAF (attached) log was +/- 3% the week...

    The OLMAF (attached) log was +/- 3% the week prior, pretty close and what it wants. I lean towards what it wants instead of a perfect polynomial curve so long as there are not significant...
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    bump

    bump
  23. Questions after updating fuel injector data

    Summary:
    After updating the FIC data to what Calibrated Success measured, I'm having worse fuel economy and my MAF g/s has gone up as much as 70g/s at WOT. Did I do something wrong?

    Detail:
    I...
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    Bump - I am hoping to make progress on this while...

    Bump - I am hoping to make progress on this while I'm off work this week.
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    O2 transport delay

    Does anyone have a definitive step-by-step guide on how to get factory-quality closed loop operation after installing long tube headers? I've read the following thread but my calibration has fewer...
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