Quote:
Originally Posted by Kodename47
Unless you max out the MAF you don't need a larger MAP and in most PD blowers I've seem (not seen the logs of a Harrop for some time) the pressure wave resonance in the manifold has a negative impact on a wider range sensor that the OEM one isn't able to detect, hence it will run better on the OEM sensor. This is why many recommend the D-Box but is actually able to be mapped out quite easily on EcuTek.
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Again, of course, that will require a tuner that tunes off the MAF. Tuners with canned-custom-revisioned-tunes based only on MAP input will likely require an upgraded MAP sensor. I can confirm the the Harrop kit does suffer the same resonance as the Edelbrock kit, but it could be to less of an extent because the MAP location is close to the runners. I don’t know if the DBox works on the Harrop kit, but it could do the same to smooth out the signal in theory like you said.
Questions: If a tuner had both inputs, would it be better? My intuition is no or the DBox wouldn’t be necessary, but maybe it is a matter of it being used. What’s the limit of the stock MAF?