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Okay, I have been addressing a few issues on my H/C car to make sure all my peripheral mods are up to snuff.
When I had a great running 340/350 (through 3.91s) bolt on tune I had no tune troubles. I was given a Tbyrne ported MAF and tossed it on, but kept the factory maf between the tbyrne ends. No problems noted, no codes. Ran fine for a year.
Put the fat cam and heads on, broke it in for a few days, went to tune. Hooked straight onto dyno, started doing pulls and tuning. My tuners reputation is good and he is experienced without a doubt.
#s came in a bit low, but in horrible (100*+) conditions. We pulled with lid open, and concluded a little vacuum was still present in the intake, but only 2hp gained with lid up.
After, we went to road tune. HERE is the ??
The tuner noticed my car wouldn't run in SD mode. We sat for 20 minutes while he tinkered and toyed with the idle/maf settings, and commented that he didn't know I had changed the MAF ends and descreened. Took quite a bit, then we went and did road logging etc.
Would doing the pulls before setting up the MAF settings effect the dyno pulls and tuning we did?
Could more timing/fuel or whatever have been added if the MAF cal had been done first?
Just looking for what effect this would have had on the big picture.
Thanks.
BTW, HPT used on the latest tune, LS1edit on the original, which ran great with that MAF. Car runs strong, no codes in a few thousand miles, but now looking for every extra tweak.
When I had a great running 340/350 (through 3.91s) bolt on tune I had no tune troubles. I was given a Tbyrne ported MAF and tossed it on, but kept the factory maf between the tbyrne ends. No problems noted, no codes. Ran fine for a year.
Put the fat cam and heads on, broke it in for a few days, went to tune. Hooked straight onto dyno, started doing pulls and tuning. My tuners reputation is good and he is experienced without a doubt.
#s came in a bit low, but in horrible (100*+) conditions. We pulled with lid open, and concluded a little vacuum was still present in the intake, but only 2hp gained with lid up.
After, we went to road tune. HERE is the ??
The tuner noticed my car wouldn't run in SD mode. We sat for 20 minutes while he tinkered and toyed with the idle/maf settings, and commented that he didn't know I had changed the MAF ends and descreened. Took quite a bit, then we went and did road logging etc.
Would doing the pulls before setting up the MAF settings effect the dyno pulls and tuning we did?
Could more timing/fuel or whatever have been added if the MAF cal had been done first?
Just looking for what effect this would have had on the big picture.
Thanks.
BTW, HPT used on the latest tune, LS1edit on the original, which ran great with that MAF. Car runs strong, no codes in a few thousand miles, but now looking for every extra tweak.