How much hp

54VAGE · 08-27-2016, 11:25 PM

So I am jb4 FBO n54 rwd AT. I went on a mustang dyno and made 370hp and 470 tq (low rating dyno). No meth/inlets with 3 gallons of e85. The guys said to rate it up 15% so it's around 425? Now I added MHD back end (race) flash to my jb4 and have walbro 255. How much HP should I be able to make now with 50% e85? Curiosity before I hit a dyno again.
And if anybody can suggest, which MHD back end flash should I use? E40 or race?

LQQKOUT · 08-28-2016, 10:33 AM

I would say 400-420 hp on the same dyno, but it all depends on how much boost you were running before and now.

Grand_hustle17 · 08-28-2016, 11:04 AM

Get custom tune

jjbmuu · 08-28-2016, 12:28 PM

Those were some crazy baseline numbers.. Huge difference between torque and hp. Was the tune targeting a lot of torque or was that peak hp number only achieved for a very short period of time? I made 60 more hp and only 15 more tq on a Mustang FBO plus meth. With those numbers it's probably not a very smooth power curve or at least not as smooth as mine.

csu87 · 08-29-2016, 09:22 AM

dont uprate it to try and match with other dynos... thats amateur hour bs

with 50% E, probably 410-420 on that same dyno depending on tuning. Could probably get to around 430-440 with a great tune

Tiago@VRSF · 08-29-2016, 10:31 AM

I'd expect you to gain about 25-35whp with inlets depending on how aggressive the tune is.

08-27-2016, 11:25 PM	#1
54VAGE Second Lieutenant 15 Rep 200 Posts Drives: '09 E92 N54 335i Join Date: Jun 2015 Location: East Meadow iTrader: (0) Garage List 2009 BMW 335i [0.00]	HP? Jb4/MHD FBO So I am jb4 FBO n54 rwd AT. I went on a mustang dyno and made 370hp and 470 tq (low rating dyno). No meth/inlets with 3 gallons of e85. The guys said to rate it up 15% so it's around 425? Now I added MHD back end (race) flash to my jb4 and have walbro 255. How much HP should I be able to make now with 50% e85? Curiosity before I hit a dyno again. And if anybody can suggest, which MHD back end flash should I use? E40 or race? __________________ E92 N54 JB4, MHD, Alpina flash, ARM DPs, Cobb CP/HKS bov, BMS DCI/OCV, PE exhaust, 2nd cat delete (vibrant 1792), Mishimoto FMIC, Fuel-It stage 2, Msport F30 N20 EWG
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08-28-2016, 10:33 AM	#2
LQQKOUT Lieutenant 102 Rep 416 Posts Drives: 335XI Join Date: Jul 2011 Location: United States iTrader: (4)	I would say 400-420 hp on the same dyno, but it all depends on how much boost you were running before and now.
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08-28-2016, 11:04 AM	#3
Grand_hustle17 Major 192 Rep 1,173 Posts Drives: E90 335i Join Date: Aug 2015 Location: Maryland iTrader: (0)	Get custom tune
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08-28-2016, 12:28 PM	#4
jjbmuu 4ut0strd4 47 Rep 223 Posts Drives: 08 AW E92 335i 6 Speed Join Date: Nov 2011 Location: Florida iTrader: (0)	Those were some crazy baseline numbers.. Huge difference between torque and hp. Was the tune targeting a lot of torque or was that peak hp number only achieved for a very short period of time? I made 60 more hp and only 15 more tq on a Mustang FBO plus meth. With those numbers it's probably not a very smooth power curve or at least not as smooth as mine. Last edited by jjbmuu; 08-28-2016 at 01:02 PM..
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08-29-2016, 09:22 AM	#5
csu87 Banned 2134 Rep 3,554 Posts Drives: 09 335xi Join Date: Nov 2013 Location: Northern Colorado iTrader: (0)	dont uprate it to try and match with other dynos... thats amateur hour bs with 50% E, probably 410-420 on that same dyno depending on tuning. Could probably get to around 430-440 with a great tune
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08-29-2016, 10:31 AM	#6
Tiago@VRSF 2095 Rep 43,350 Posts Drives: F90 M5 Join Date: Dec 2007 Location: Doral, FL iTrader: (99) Garage List 2014 F30 328xi [0.00] 2015 F82 BMW M4 [0.00] 2013 Ducati 1199 Pa ... [0.00] 2008 BMW 335i [0.00]	I'd expect you to gain about 25-35whp with inlets depending on how aggressive the tune is.
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