Whats the point of an LS7 MAF?
Whats the point of an LS7 MAF? Can someone explain what the point is of a 4" LS7 MAF sensor if the stock PCM is limited to 512 g/s? With boost it's not too hard to hit this limit. Perhaps the LS7 MAF is more for NA applications to reduce intake restrictions? I think the LS7 MAF is capable of reading more than 512 g/s, but will be limited by the PCM? Is this correct?
It would still be better than the 85mm Delphi, which
hits the 12kHz limit first (about 460g/sec). But I bet
it's mostly "bigger is better", letting people match the
rest of the plumbing on big TB setups (whether it has
much impact, or not).
hits the 12kHz limit first (about 460g/sec). But I bet
it's mostly "bigger is better", letting people match the
rest of the plumbing on big TB setups (whether it has
much impact, or not).
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Joined: Mar 2013
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We use them regularly in Gen 4 applications like Trailblazer SS's, LS2 Vettes, etc. We also use them quite often in hotrod/street rod builds. They flow quite a bit more than even the 85mm units. The PCM can be scaled to get around the 512 limit.
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Looks like its a bigger 4inch tube considering the Hz is around 3000 at 1700rpms. Ive never had problems with bigger tubes, however the tube shifts the MAF frequency to the left and with a bigger tube the MAF numbers need to be increased down low.
It is a 102 TB with LS3/7 MAF in a 2001 C5 & yes a bigger tube.
I don't understand this comment?
"however the tube shifts the MAF frequency to the left and with a bigger tube the MAF numbers need to be increased down low"
I don't understand this comment?
"however the tube shifts the MAF frequency to the left and with a bigger tube the MAF numbers need to be increased down low"
Say a setup with a 3.5inlet idles at 3000hz at 8 g/sec and at 2300hz that number may be 5g/sec. If you use a 4in inlet or larger it shifts the Hz to the left or down. So placing a 4inch tube on that setup would require the MAF to be adjusted so if a 4inch inlet idles at 2400hz 5 g/sec is not enough if the engine needs 8g/sec.
Hope that makes sense.
Hope that makes sense.
