[tzargarpur]

As stated above would a catless DP yield a noticeable amount of power gain compared to a catted DP assuming its FBO / BM3 stage 2 tune? And compared to other N55 cars does the M2 N55 get a little more power once FBO stage 2?

What are realistic numbers? 390 WHP / 430 WTQ like an M235i? Or higher?

[nioh_lbbm2]

Negligible difference in power

Main benefit for catless is usually cost and some people like to have aggressive burbles.

[tzargarpur]

Can anyone also comment on the weight savings of a muffler delete? If I went to a quality muffler shop and had the entire backbox replaced with just straight pipes would it save ~35 pounds? More? Less? Plan on doing weight savings and as much as I dont want to delete the muffler, 35 pounds is fairly significant for my goal of near 175 pounds total reduction.

[mike@x-ph.com]

Originally Posted by tzargarpur

As stated above would a catless DP yield a noticeable amount of power gain compared to a catted DP assuming its FBO / BM3 stage 2 tune? And compared to other N55 cars does the M2 N55 get a little more power once FBO stage 2?

What are realistic numbers? 390 WHP / 430 WTQ like an M235i? Or higher?

on stock turbo, high flow catted and catless get you the same power.
Numbers will depend on your tune and map

[tzargarpur]

Originally Posted by mike@x-ph.com

on stock turbo, high flow catted and catless get you the same power.
Numbers will depend on your tune and map

BM3 Stage 2 tune. Estimated power?

[mike@x-ph.com]

Originally Posted by tzargarpur

BM3 Stage 2 tune. Estimated power?

I dont dynos for off the shelf maps but numbers we are seeing with BM3 Jordan custom maps are

E30 N55 (Stock Turbo) 410-460whp (Depending on OEM HPFP vs. Aftermarket HPFP)
93 Octane (98RON) N55 (Stock Turbo) 380-420whp (Depending on OEM HPFP vs. Aftermarket HPFP)
91 Octane N55 (Stock Turbo) 360-390whp (Depending on OEM HPFP vs. Aftermarket HPFP)