Close

Activity Stream

Filter
Sort By Time Show
Recent Recent Popular Popular Anytime Anytime Last 24 Hours Last 24 Hours Last 7 Days Last 7 Days Last 30 Days Last 30 Days All All Photos Photos Forum Forums Articles Articles
Filter by: Forums Last 24 Hours Clear All
  • iminhell1's Avatar
    Today, 04:57 AM
    The put a dct behind a n54 factory? ah, the 335is. Didn't know that existed. From all the videos xHP has posted, I'm not sold at all. I have not seen any logs to back any claims. There has not been any reviews that I've seen, just video of oodles of d cars. I'd like to believe this will be a good product, but I think it's too hyped right now. When MHD rolled out it was pretty hush hush. But once a few tried it, it was like crack. I see xHP selling well, but getting mediocre reviews. The old grey hairs might like the 'sportier' shifts in d. But the rest of us want some user adjustability.
    6 replies | 213 view(s)
  • Sw4y1313's Avatar
    Today, 03:58 AM
    Yeah, I think the highest guy was 640awhp and over 600awtq that I can find a dyno sheet for. He launched his car hard multiple times and blew the front diff i believe. I'm not going for record setting 1/4 times, I'm more focused on 1/2 mile and hill climbs. I'm going to be keeping boost low in the mid range(to keep torque in the low 500s and flat) and spinning to ~7200rpms. Shooting for a S65 style torque curve to keep the front drivetrain happy.
    5 replies | 492 view(s)
  • Sticky's Avatar
    Today, 03:16 AM
    A recent article about a Mustang dyno run for the Alfa Romeo Giulia Quadrifoglio exposed a large flaw in traditional dyno thinking. On this website most readers know that you can not just grab a graph from one type of dyno and compare it to another dyno and expect the numbers to be uniform. Unfortunately, the average person does not understand this which is what led to someone putting out an article stating the Giulia Quadrifoglio is not making its stated output which sets understanding of dyno runs back instead of helping educate. Let's start with the idea that cars suffer from 15% drivetrain losses. Where did this idea start? Why is it 15%? It originated with the Dynojet and became a rule of thumb on automotive forums for manual transmission cars. The percentage changes based on if the car is automatic (20%) or even all wheel drive and automatic (25%). The problem here is that while the conversion factor works well to extrapolate crank horsepower from peak Dynojet figures at the wheels that is not the way drivetrain losses work. First of all, losses are not static. There is no one set figure for losses. What does this mean? It means that your losses in 5th gear at 8000 rpm will be different from 2nd gear at 2000 rpm. The loss figure will change based on rpm, load, and even what accessories are running. Stating all manual cars suffer from a single set figure is flawed for this reason. Not to mention that figure only works on the Dynojet which is inertia based. BMW M cars used to follow the number exactly back when they were naturally aspirated: E46 M3 S54 Displacement: 3.2 liter Horsepower: 343 Torque: 269 lb-ft Wheel Horsepower: 280 Wheel Torque: 235 E92 M4 S65 Displacement: 4.0 liter Horsepower: 414 Torque: 300 lb-ft Wheel Horsepower: 350 Wheel Torque: 254 lb-ft 85% of 414 horsepower is 351.9. Notice the E92 M3 is almost exactly at 15%. DCT models would actually dyno slightly less than manual examples due to the wet clutch dual clutch having higher losses. For the E46 M3 85% of 333 horsepower is 283.05. Again, the E46 M3 is almost perfectly at 15% losses on the Dynojet. It's almost scary how consistently close BMW was to this figure. Now, in comes the turbo era. Let's see what happens when we get to the F80 M3. F80 M3 S55 Horsepower: 425 Torque: 406 lb-ft Wheel horsepower: 427 Wheel torque: 429 How is the S55 engine producing more horsepower at the wheels than it is rated at the crank by BMW? Does the F80 M3 have a magical transmission with negative losses that somehow adds power? Of course not. The DCT transmission in the F80 M3 works the same way as the DCT transmission in the E92 M3. What happened was the 15% Dynojet loss rule went out the window when the turbo power war started. BMW is able to claim a lower number to not push an output war on paper yet delivers far more where it matters, to the tires. The drivetrain losses are still about the same for the transmission and rear wheel drive layout as the previous generation despite it no longer lining up with the crank horsepower figure which is practically meaningless. How does this all look on a Mustang load bearing or eddy current variant? Well, very different. While the Dynojet is spinning a drum of a set weight and calculating the result based on how quickly that weight is spun the Mustang dyno creates load. Why is this important? Because it simulates real world conditions which is great for tuning. A tuner can provide all kinds of different scenarios. The spool on the Mustang for a turbo motor will look different than on a Dynojet. Often time real world spool is much quicker than what is shown on a Dynojet graph due to load which generates exhaust gases more quickly for the turbochargers. Note: Dynojet operators can optionally eddy current load control as well which muddies comparisons further. The other day BimmerBoost posted an article on VF-Engineering's F87 M2 ECU flash software and provided Dynojet runs. Let's take a look at the same M2 running the same Stage I software on a Mustang: Now the Dynojet: 269 rear wheel horsepower for the Mustang and 331 rear wheel horsepower for the Dynojet on the baseline figure. That is a difference of 62 horsepower at the wheels or 18.7 %. If you take that 18.7% difference and apply it to the tuned run on the Mustang which shows 287 to the wheels you get 354 horsepower. Almost exactly what the Dynojet tuned run shows. This is not an exact science as you can see. However, if you were to dyno cars all day on the Dynojet and on this Mustang you would see the runs follow very closely to the ~18% difference between the two. So is that it? Just convert Mustang runs by 18.7% to get a Dynojet number? No. Things actually get very muddied due to the games tuners play. Here is an example. The new Porsche 991.2 Carrera S on a Dynojet: 380 horsepower to the wheels. Now here is a 991.2 Carrera S on a Mustang from AWE-Tuning: Why does the Mustang dyno show more power now? Because it is being corrected to read higher. People do not like low numbers and high numbers are better for marketing. BoostAddict asked AWE-Tuning what their correction factor is but they would not share it with us. You can see it is reading VERY high and higher than a Dynojet though. In this instance it is better to focus on the delta which you will often hear tuners say. That means the difference between the two runs as comparing the peak figures to other runs on other dynos is pointless due to the unknown correction factor. Good for marketing, bad for those who want relevant to compare figures with. It can also be very bad for consumers. Why is that you ask? Because some people will dyno without a correction factor and then change the correction factor to show larger gains. A good example of someone who plays with the numbers is Vivid Racing: http://www.bimmerboost.com/content.php?4252-Inflated-numbers-Vivid-Racing-claims-407-wheel-horsepower-for-exhaust-and-VR-ECU-tuned-E9X-M3-S65-on-a-Mustang-dyno They claim 407 wheel horsepower for an exhaust and canned tune on a Mustang dyno for the E92 M3. Anyone who has an E92 M3 (like me) and has had these modifications and dyno'd the car knows this is impossible. It looks good for someone who doesn't know that though and wants to buy parts thinking they make a ton of power, right? Always keep in mind when you see figures from a company or tuner you should question them. Independent runs are the best to go by as the person usually isn't trying to sell you anything but just share their results. Also remember the Mustang can be configured like most dynamometers to read whatever the operator wants it to read. If vendors and tuners did not play with dyno runs for sales we would have a great resource to work with for comparisons and so forth. You can not trust all tuners to do so. Fortunately, VF-Engineering has no dog in the fight and provided us with a variety of runs showing the difference between their Mustang and their Dynojet. Yes, they have both. That is the proper way to do it. One dyno for tuning and one for marketing. Rather than correcting figures with whatever percentage generates the most sales they show the uncorrected runs on both machines so people can learn from and reference the pulls. BMW 335i (N55) Stage TWO Dynojet: Mustang: An 18.2% difference between the peak horsepower on the tuned figures. There will be variance from run to run, day to day, fuel to fuel, gear to gear, etc. Ultimately, remember, while dyno runs can tell you a lot about a motor or modifications they can also mislead people. Even worse, people can read them incorrectly and spread misinformation or manipulate them to sell parts. A dyno is just one, albeit important, piece of the performance puzzle.
    2 replies | 24 view(s)
  • nikitino25's Avatar
    Today, 02:43 AM
    nikitino25 replied to a thread Spec stage3+ & steel SMFW in N54
    DON'T DO IT! Don't fuck with that bearing.....you don't need a new one most likely and it's more trouble than it's worth even if you do need one........
    8 replies | 567 view(s)
  • Flinchy's Avatar
    Today, 01:26 AM
    To be fair, every factory n54 Dct has shifted super slow, surprisingly, that I've driven.
    6 replies | 213 view(s)
  • j_hynson's Avatar
    Today, 01:19 AM
    Commenting to come back to
    19 replies | 5596 view(s)
  • Dirty Dog's Avatar
    Today, 12:44 AM
    DCT like shifts :rofl2:
    6 replies | 213 view(s)
  • The Convert's Avatar
    Today, 12:03 AM
    The Convert replied to a thread Spec stage3+ & steel SMFW in N54
    If you have access to a simple press, it's easy peasy. A new one isn't a bad idea though.
    8 replies | 567 view(s)
  • j_hynson's Avatar
    6 replies | 213 view(s)
  • Sticky's Avatar
    Yesterday, 11:29 PM
    Yeah so you're just going to stress it more? The best thing for higher HP cars is a manual or a DCT swap.
    6 replies | 213 view(s)
  • Terry@BMS's Avatar
    Yesterday, 11:27 PM
    In the other thread they claimed adjustable shift points which would be great for higher HP cars... Except for the fact that the factory trans doesn't hold up well above 600whp for long.
    6 replies | 213 view(s)
  • j_hynson's Avatar
    Yesterday, 11:25 PM
    I got drug by a 460ci built nitrous camaro. Pulled pretty good on him in the beginning and at the end he reeled me in. Nawseee I'll see if I can get the video uploaded. It's not the best as it was unplanned and on a phone from my passenger side looking across the driver side.
    97 replies | 12856 view(s)
  • Sticky's Avatar
    Yesterday, 11:24 PM
    What are they doing?
    811 replies | 451252 view(s)
  • j_hynson's Avatar
    Yesterday, 11:22 PM
    Well Wednesday night I managed to get into trouble with the fuzz but ended up with a speeding ticket. I didn't do much racing though...port injection wasn't on because AEM wouldn't connect to computer to tune so we put a good e30 tune on there and I enjoyed that for a little. There was one single turbo cah out there with some 15s and meats. Another one that caught my attention that I didn't know before was single turbo with up pipe straight out of a hood that was not on the car. Whoever the guys claiming that they have 9xx whp and in the 4 digit numbers that said they would be at tx2k or claimed that they were at tx2k either didn't show up, forgot their horsepowers or just like to troll the internet.
    97 replies | 12856 view(s)
  • Sticky's Avatar
    Yesterday, 11:09 PM
    Sticky replied to a thread Last second TX2K17 build thread in N54
    Vids are kind of slow to pop up. Any good runs anyone?
    97 replies | 12856 view(s)
  • Sticky's Avatar
    Yesterday, 11:09 PM
    Sticky replied to a thread NWS: BIMMERBOOBS in Off Topic - Not Work Safe
    Yeah I know... those two are perfect. I mean just perfect.
    113 replies | 90423 view(s)
  • Sticky's Avatar
    1 replies | 63 view(s)
  • camberadam's Avatar
    Yesterday, 10:45 PM
    camberadam started a thread WTF gas tank?! in N54
    After beating my head against a wall for 3 hours trying to get the top hat notch to line up, I think I discovered a factory Friday flaw... All pics online show the notch @ approx 1-2 oclock. Notice mine is more in the 10-11 range. I THINK this is what was causing all my issues (none of the internal plumbing fit). Makes sense if the pump is clocked almost 90* out... The "notch ring" appears to be separate from the tank itself (notches/tabs molded into tank 90*). I tried prying up on it a little to reclock it, but stopped before disaster. looking at diagrams, I can't buy it. And as far as the top hat that came off the car, it does look like the area above the notch has been rubbed harder by the retaining ring. This makes me think they just cranked down on the retainer ring a little harder. 1. Am I correct or just need sleep? If I decide to trim the top hat & make it work (I REALLY don't want to drop the tank to try & separate the ring from tank) I need to know how to orient the pump. 2. Are the 2 hoses in the top hat parallel to centerline of car (that makes the float arm run almost perfect L & R)? Or off slightly?
    0 replies | 66 view(s)
  • The Ghost's Avatar
    Yesterday, 10:41 PM
    The Ghost replied to a thread NWS: BIMMERBOOBS in Off Topic - Not Work Safe
    :eusa-clap::eusa-clap::eusa-clap:
    113 replies | 90423 view(s)
  • The Ghost's Avatar
    Yesterday, 10:37 PM
    Who all made it to 2k? I met a few of the ST guys.
    97 replies | 12856 view(s)
  • Sticky's Avatar
    Yesterday, 10:21 PM
    This is going to be ready to go in about a week but the video posted claims 'DCT like' shifting. Based on what though? Because they think it shifts faster? There is literally no measurement of any kind provided to corroborate that and it just seems to be hype: Ok, so the shifts are firmed up a but (nowhere near a DCT from that vid) but what else? Where is the full control? Programmable shift points and so forth? You can see at the end of the video the car revving out slightly higher. What's the big deal here?
    6 replies | 213 view(s)
  • Sticky's Avatar
    Yesterday, 10:15 PM
    We have several guys overseas so this might help them. I don't know this company or have any result to share but it may be worth looking into: Says a Stage 3 TDO4 option is in development as well.
    0 replies | 60 view(s)
  • Sticky's Avatar
    Yesterday, 09:53 PM
    It's coming:
    811 replies | 451252 view(s)
  • Sticky's Avatar
    Yesterday, 09:51 PM
    Sticky replied to a thread VTT Giveaway! Enter Here in N54
    Great amount of entries guys, this is going well!
    67 replies | 5716 view(s)
  • Sticky's Avatar
    Yesterday, 09:47 PM
    Just browsing around it seems many AWD guys don't want to go past 600 whp.
    5 replies | 492 view(s)
  • Sticky's Avatar
    Yesterday, 09:46 PM
    Sticky replied to a thread For Sale: Fuelit FPR & Return Lines in Buy/Sell - Parts
    GLWS
    1 replies | 177 view(s)
  • Sticky's Avatar
    Yesterday, 09:39 PM
    Tires all vary from their actual measurements. I doubt you would really lose much of anything but only one way to find out...
    7 replies | 4477 view(s)
  • s62's Avatar
    Yesterday, 09:33 PM
    That is at the paint shop ;)
    53 replies | 26351 view(s)
  • BoostDr's Avatar
    Yesterday, 07:02 PM
    BoostDr replied to a thread VTT Giveaway! Enter Here in N54
    Count me IN!
    67 replies | 5716 view(s)
More Activity