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Terry @ BMS Terry @ BMS is offline
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Posts: 32,578
Join Date: Jan 2008
Default 09-24-2019, 02:03 PM

The results showed a fairly significant increase in power between our drop in and the GM filter. We logged boost and AFR on the dyno during the runs as well as full logs via HP Tuners to better quantify the reason for the substantial gains and determined some is due to the reduced restriction of the filter itself while some of the gains, like from the original BMS drop in, are due to the ability of the thinner filter base to adjust the air/fuel ratio.

Almost as interesting was the fact that the original airbox with BMS drop in yielded dramatically more power than the GM airbox and was almost on par with the GM airbox with the BMS drop in.

We suspect at higher power levels we'll see more of a gain from the reduced restriction but I think these results might be a little eye opening for those runnig stock tuning and the GM performance airbox. You'd be better off on power with the stock airbox and our original drop in.

That said we're also moving in to production on our GM performance airbox drop in and will post as soon as those are ready for shipment!
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