MHD stage 2 without dp

TheBigManatee · 02-03-2019, 01:35 PM

I know going with a dp is recommended but im in CA so i don't want to deal with the hassle of taking off and putting on the downpipe for emissions. So i was wondering if I can run stage 2 with just an intercooler, chargepipe and exhaust without any problems.

rtsea · 02-03-2019, 01:43 PM

Quote:

Originally Posted by TheBigManatee

I know going with a dp is recommended but im in CA so i don't want to deal with the hassle of taking off and putting on the downpipe for emissions. So i was wondering if I can run stage 2 with just an intercooler, chargepipe and exhaust without any problems.

I emailed mhd this exact question and got the following response

"
you can run the stage 2 without any mods yes (a upgraded chargepipe is recommended) but the stage 2+ requires the recommended mods.
"

mike@x-ph.com · 02-05-2019, 08:28 PM

They should call it stage 1+ then instead of stage 2

jgoens · 02-06-2019, 10:00 PM

Quote:

Originally Posted by TheBigManatee

I know going with a dp is recommended but im in CA so i don't want to deal with the hassle of taking off and putting on the downpipe for emissions. So i was wondering if I can run stage 2 with just an intercooler, chargepipe and exhaust without any problems.

What year is your car? You know, you now have 8 years before having to do emissions. DP has more improvements other than just being able to run stage 2+ properly.

TheBigManatee · 02-06-2019, 11:07 PM

Quote:

Originally Posted by jgoens

What year is your car? You know, you now have 8 years before having to do emissions. DP has more improvements other than just being able to run stage 2+ properly.

2015. I thought smog was 5 years from new. If its eight years might as well go for the downpipe then.

bradsm87 · 02-06-2019, 11:50 PM

No. Run Stage 1+.

There is no free lunch. Run the tune to suit your mods.

jgoens · 02-07-2019, 01:09 AM

Quote:

Originally Posted by TheBigManatee

2015. I thought smog was 5 years from new. If its eight years might as well go for the downpipe then.

It was 6 years and this year changed to 8 so you have a while..go for it.

Ownnij · 02-08-2019, 06:18 PM

i find this interesting.. so i'm not a tuner but i kind of understand that tuning is messing with the engine air fuel ratios to get more power out of the motor. so if you tune a car to "stage 2" which typically requires some bolt ons in most cars... if you don't have those recommended parts with the tune then i would think the ecu would pull timing and not run as well.. specially when it's hot outside (heat soak).

i guess this all depends on the tune you're running but would that suck if you flashed a pretty aggressive stage 2 map and then you get a few misfire codes and the knock sensor detects engine knock. i'm not a BMW expert in any way but sounds definitely possible.. not enough for me to want to put a stage 2 tune on my car when i'm clearly stage 1 lol..

correct me if i'm wrong though. I would like to know, thanks!

02-03-2019, 01:35 PM	#1
TheBigManatee New Member 4 Rep 7 Posts Drives: f32 435i Join Date: Jan 2019 Location: CA iTrader: (0)	MHD stage 2 without dp I know going with a dp is recommended but im in CA so i don't want to deal with the hassle of taking off and putting on the downpipe for emissions. So i was wondering if I can run stage 2 with just an intercooler, chargepipe and exhaust without any problems. Last edited by TheBigManatee; 02-03-2019 at 01:41 PM..
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02-05-2019, 08:28 PM	#3
mike@x-ph.com BimmerPost Supporting Vendor 24148 Rep 190,717 Posts Drives: 07-335/12-328/18-M4/21-M4CP Join Date: Sep 2013 Location: Las Vegas iTrader: (23)	They should call it stage 1+ then instead of stage 2 __________________ Check out our current sale by clicking on this link! https://x-ph.com/sale/ Phone number 702-494-9435
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02-06-2019, 11:50 PM	#6
bradsm87 Lieutenant Colonel 595 Rep 1,693 Posts Drives: F25 LCI xDrive30d Join Date: Jun 2013 Location: Australia iTrader: (0)	No. Run Stage 1+. There is no free lunch. Run the tune to suit your mods.
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02-08-2019, 06:18 PM	#8
Ownnij Private First Class 48 Rep 128 Posts Drives: F30 335i Join Date: Mar 2018 Location: Dallas tx iTrader: (1)	i find this interesting.. so i'm not a tuner but i kind of understand that tuning is messing with the engine air fuel ratios to get more power out of the motor. so if you tune a car to "stage 2" which typically requires some bolt ons in most cars... if you don't have those recommended parts with the tune then i would think the ecu would pull timing and not run as well.. specially when it's hot outside (heat soak). i guess this all depends on the tune you're running but would that suck if you flashed a pretty aggressive stage 2 map and then you get a few misfire codes and the knock sensor detects engine knock. i'm not a BMW expert in any way but sounds definitely possible.. not enough for me to want to put a stage 2 tune on my car when i'm clearly stage 1 lol.. correct me if i'm wrong though. I would like to know, thanks!
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