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  • F3ADM's Avatar
    Today, 08:33 PM
    109 replies | 4167 view(s)
  • Fishayyy's Avatar
    Today, 08:26 PM
    I feel you. I could be wrong but I think PI is simpler/more reliable than DI and it's cheaper. The major thing it lacks in comparison to DI is power per unit of volume. Probably cylinder cooling as well. But if you can make your power goals with PI for less $$$, the price to upgrade your DI becomes less appealing. But that's just my opinion.
    68 replies | 1285 view(s)
  • AdminTeam's Avatar
    Today, 08:12 PM
    Welcome to a real enthusiast forum Ethan12horn.
    0 replies | 0 view(s)
  • BlackJetE90OC's Avatar
    Today, 07:59 PM
    Results basically line up perfect with C&D testing results for both cars. M2 DCT has more power down low, while the E90 M3 DCT reels it in up top. C/D TEST RESULTS (E90 M3 DCT): Zero to 60 mph: 4.3 sec Zero to 100 mph: 9.9 sec Zero to 150 mph: 26.0 sec Street start, 5-60 mph: 4.9 sec Standing -mile: 12.7 sec @ 113 mph Top speed (governor limited): 161 mph Braking, 70-0 mph: 147 ft Roadholding, 300-ft-dia skidpad: 0.96 g C/D TEST RESULTS(M2 DCT): Zero to 60 mph: 4.0 sec Zero to 100 mph: 9.6 sec Zero to 130 mph: 18.3 sec Zero to 150 mph: 28.6 sec Rolling start, 5-60 mph: 4.4 sec Top gear, 30-50 mph: 2.4 sec Top gear, 50-70 mph: 2.9 sec Standing -mile: 12.5 sec @ 113 mph Top speed (governor limited): 163 mph Braking, 70-0 mph: 155 ft Roadholding, 300-ft-dia skidpad: 0.99 g
    1 replies | 15 view(s)
  • AdminTeam's Avatar
    Today, 07:51 PM
    Hey greg168: :text-welcomewave:
    0 replies | 0 view(s)
  • Ericbh77's Avatar
    Today, 07:49 PM
    I have PI but i find it to be a band aid to allow engine to reach higher HP levels "temporarily". I don't find it to be the most efficient fuel delivery method. It's just the current solution for now. And don't get me wrong it works good, i just know there's a better, more simplified way. It's just a matter of cost.
    68 replies | 1285 view(s)
  • psychosinmylobby's Avatar
    Today, 07:36 PM
    Hey guys, It seems that there are more and more reports on rod bearing failures so I am starting this thread to understand which factors correlate the most to failures of rod bearings in N54s. As our engines age, this may be an impending issue if we don't address it. I am hoping to collect data to find the common factors to this issue which will help us prevent it. The most obvious factor is oil dilution. Please read this if you want to know more: https://www.amsoil.com/techservicesbulletin/MotorOil/TSB%20MO%202004-07-02%20Fuel%20Dilution.pdf So for those of you who had rod bearing failures please answer the following questions: Which N54 car do you drive (Model and Transmission) Miles on the car/engine when the rod bearing failure was detected What HP/TQ were you running when you detected a rod bearing failure (Name the modifications if you don't know.) How many miles were you running the previously stated setup What tune / who tuned Did you have leaky injectors What fuel did you run Did you often turn the car off before it reached operating temperature (short trips) Did you idle the car a lot What is your OCI (Oil Change Interval) What kind of oil and viscosity do you use External factors (e.x. Shop forgot to put oil back) Much Appreciated!
    0 replies | 11 view(s)
  • psychosinmylobby's Avatar
    Today, 07:08 PM
    Haha no worries. Come to think of it, BSFC is an efficiency metric and 0.7 was an approximation by terry off a DI setup. With the less efficient PI and e85, we maybe looking at BSFC of 0.85-0.95. We should recalc based on 0.85-0.95 for hp above 550whp (when DI is maxed). Using 0.95 just to be safe, we are looking at 633 LPH requirement minimum.
    68 replies | 1285 view(s)
  • Chris@VargasTurboTech's Avatar
    Today, 07:01 PM
    I believe the current hpfp can be upgraded but as mentioned above, it becomes a cost issue. My research on it came out a lot less than 5k but to be economically feasible it needs to be <$1500, ballpark guesstimate with ~600whp of fueling capability and my improvment results were unknown (they always are until you test) so I temporarily stopped working on it. A mild upgrade with the shotgun overspeeding may be the key to victory.
    68 replies | 1285 view(s)
  • AdminTeam's Avatar
    Today, 06:47 PM
    E90335, we appreciate you taking the time to join.
    0 replies | 10 view(s)
  • pr3ci5n335i's Avatar
    Today, 06:40 PM
    Those are some disappointing MHD stage 1 results. Gained some torque but no HP..? Solid results for JB4/MHD combo though. Time after time the JB4/MHD BEF combo proves to be the most lethal tune available.
    2 replies | 63 view(s)
  • lfelunden's Avatar
    Today, 06:24 PM
    Both cars are stock! Pretty impressive for the M2 even at high speeds. I think a simple drop-in filter would do wonders :awesome:
    1 replies | 15 view(s)
  • Fishayyy's Avatar
    Today, 06:09 PM
    +1 I'm not trying to be a downer, but the idea of a higher flowing HPFP when people think the Syvecs is expensive at 5.3k? I dont think many manufacturers are going to want to jump on. But I could be wrong. Is there any reason as to why people don't like supplemental PI? Because I thought the biggest difference between the two is efficiency.
    68 replies | 1285 view(s)
  • Chris@Boost Concepts Inc's Avatar
    Today, 05:59 PM
    to manufacture (not selling cost but manufacturing cost) an aftermarket HPFP without any volume would cost more than an upgraded twin pump LPFP , Port Injection, and all the lines and additional hardware and controller.. and then it would be subject to the same failure points as the factory unit if not be worse which would be a warranty nightmare for the manufacturing company.. so in turn, they would have to charge 2-3 times the manufacturing cost to make it worthwhile. so while we all say we want it.... honestly ask yourself if it hit the market with a pricetag of $5k.. who would be in on it? Chris
    68 replies | 1285 view(s)
  • Stucks's Avatar
    Today, 05:42 PM
    This. People got excited over injector tables being defined a couple months ago, and the possibility of not needing PI to reach moderate, yet higher power levels.......but that fizzled out it seems. A higher output hpfp would be a dream come true.
    68 replies | 1285 view(s)
  • sudo4re's Avatar
    Today, 05:39 PM
    sudo4re replied to a thread 335is 91 octane dyno testing in N54
    Great info Terry. Will you be able to test with 93 oct as well?
    2 replies | 63 view(s)
  • Terry@BMS's Avatar
    Today, 05:31 PM
    Hey guys, Spent a couple hours on the dyno today with our 2012 335is DCT development car. The car is 100% stock except for a dual cone intake. The car is running 91 octane fuel with no octane booster or E85 mixed in. Otherwise known as the worst gas you can tune for. All runs done in 5th gear. Temps in the 70s. First up was testing on the stock tuning for a baseline. The JB4 was installed by in "flash only" mode for logging purposes only. e.g. white subconnector left stock and JB4 on mode 4/4 so it can't influence the tuning at all. I was surprised by how choppy the timing was on the factory tuning. That's 91 octane fuel for you. I've seen the 335is factory tune go anywhere from 315whp to 335whp on 93 octane so we're at least in the ballpark here. Since the car was in "flash only" mode I decided to give the MHD v6 Stage1 ACN map a whirl. We frequently test competitive maps to ensure our customers are getting the best product available. In this case the off the shelf flash map was disappointing. We work with MHD on back end flash stuff and always look to maintain a positive relationship so I'll leave it at I think this specific map needs more work. Next up I flashed it back to stock, reinstalled the JB4 in full control mode, and grabbed a few runs on JB4 map2 and map5. I failed to capture one in JB4 only map1 although as I'm writing this I wish I had. Results were about as expected. Good power across the board with timing drops fairly similar to the stock mapping. If I had taken the time to do more runs on map5 I suspect it would have detuned itself a bit. Finally I loaded up the ina0s PUMP back end flash map and did a couple runs on JB4 map1. After these runs I spent another hour working on ina0s BEF improvements but I'm not quite ready to share info on that yet. But as a cliff notes I was able to get timing a little more stable and fix the torque limiter causing timing to go negative at 3000rpm. Still, these runs/logs on the currently available map provides a good indicator of where the JB4+BEF 91 octane DCT tuning is currently.
    2 replies | 63 view(s)
  • Fishayyy's Avatar
    Today, 05:08 PM
    I'd rep you but I've gotta spread it around lol
    68 replies | 1285 view(s)
  • blisstik's Avatar
    Today, 05:05 PM
    blisstik replied to a thread MHD load per gear per RPM in N54
    martial@mhd - what options are available to MHD JB4 backend users at flashtime? I don't recall seeing these options on the app.
    73 replies | 4316 view(s)
  • Fishayyy's Avatar
    Today, 05:05 PM
    I think the only solution is the VTT shotgun pumps. I dont really see any other solution in the wood works. Are you not a fan of PI?
    68 replies | 1285 view(s)
  • psychosinmylobby's Avatar
    Today, 05:02 PM
    http://www.onallcylinders.com/2015/05/26/fuel-pump-finder-how-to-choose-the-right-performance-fuel-pump/ With Terry confirming BSFC for our engine on e85 to be 0.7:
    68 replies | 1285 view(s)
  • Ericbh77's Avatar
    Today, 05:01 PM
    We need a new HPFP solution not more LPFP's
    68 replies | 1285 view(s)
  • Fishayyy's Avatar
    Today, 04:57 PM
    In the next month or so there will be some great upgrades available. It seems like everyone who wants to make over 1000hp is looking at 2-3 Walbro 450s
    68 replies | 1285 view(s)
  • Ericbh77's Avatar
    Today, 04:48 PM
    I'm looking for whatever can get the job done. Internal or external. Whats needed to make over 1000hp on a N/A engine is entirely different from what is needed to make the same power on a DI system. Our pressures at the injector can exceed 1000 psi and going from a common LPFP to a highly compressed HPFP changes things. Which has become painfully obvious to everyone trying to improve our fuel system. But good things always come to those who wait so i will just be patient.
    68 replies | 1285 view(s)
  • Fishayyy's Avatar
    Today, 04:35 PM
    Are you looking for internal or external pumps? I dont know how he made the calculations, but psychosinmylobby came up with some fuel calculations for 1200whp. Its roughly around 600lph @72PSI
    68 replies | 1285 view(s)
  • 135pats's Avatar
    Today, 04:33 PM
    Lol grunts like myself don't get a bunch of tickets or anything like that. If you know any players give them a ping, everyone on the 53 gets 15-25 tickets for the Superbowl alone (more like 5-10 tickets for reg. season+playoff home games).
    209 replies | 7990 view(s)
  • Ericbh77's Avatar
    Today, 04:32 PM
    I know that the limitation of our HPFP lies within the size of the 3 bellows (that cant be enlarged) but id like to know what the maximum amount of fuel this pump can "eat" so i can get a better idea of what size pumps should be adequate for say 1000hp without going over board. It's been said that 2 walbro 255 pumps can support 1000hp and so can 2 bosch 044 pumps but is that enough for a DI system? I've read up on hitachi racing fuel systems for DI and they are very critical of every aspect of the delivery system. Even the pistons are knotched witha bowl to deflect fuel spray into plug and special 3 angle camshaft lobes are used for driving the HPFP
    68 replies | 1285 view(s)
  • Stucks's Avatar
    Today, 04:29 PM
    For what its worth, someone told me on e85, youll max the hpfp out with the flow a single walbro 450 can output. The main reason for going with a stage 3 setup is if you are running PI , since a single walbro 450 isnt enough to power the hpfp AND the pi for higher boost. I believe someone on here (it was a single turbo car, maybe a 6466?) ran the hpfp and pi with a single walbro 450 on straight e85 up to 22 or 23 psi. after that, the lpfp couldn't keep up flow to both and drops below 50. Just dont remember specifically who that individual was lol.
    68 replies | 1285 view(s)
  • nafoo's Avatar
    Today, 04:24 PM
    Can you hook me up with a ticket? I live in Houston so I will definitely go if you do :D
    209 replies | 7990 view(s)
  • Fishayyy's Avatar
    Today, 04:16 PM
    I've been wondering the same thing. It seems like people only know about how much horsepower you can make on different fuels before you need PI
    68 replies | 1285 view(s)
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