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  • Sticky's Avatar
    11-15-2017, 11:55 AM
    MotorTrend got their hands on these two German hot rods featuring 3.0 liter twin turbo powerplants. The engine design is quite different however with the 911 GTS 9A2B6 featuring an oversquare flat-6 and the M4 S55 featuring an undersquare inline-6 which BoostAddict previously covered in an engine design comparison article. That said on paper these cars match up well. The M4 obviously offers greater value but it is heavier and seats four adults. The 911 does not seat four adults but is roughly 200 pounds lighter and of course more expensive. Power is essentially a wash on paper but we really need to see them both on the dyno to know the truth regarding torque curves, spool, and output. Unlike BMW who just changes software for the output gain, Porsche gives you larger turbos with the GTS. This GTS is rear wheel drive just like the M4 and both have dual clutch transmissions so this is as apples to apples as we are going to get. Ok, let's get to the actual performance comparison! They get the cars out on the Nurburgring and how can you not love that? Well, they ruin the whole thing by not providing laptimes. WTF is the point here guys? You attend a track day, talk about factory laptimes, and provide no actual performance measures. MotorTrend should never be allowed to take cars on the 'Ring again. What happens after the big Nurburgring buildup that ends in a whimper? They go on some damp and foggy mountain road and continue to yammer on about their feelings. Where is the Head 2 Head performance comparison gentlemen? You might as well have grandmothers compare these cars. What a waste of time MotorTrend. Don't call it a Head 2 Head comparison when really it is just story time with Jonny Lieberman and some guy who has an English accent which obviously means he has to know cars. You guys are a joke.
    21 replies | 64 view(s)
  • Sticky's Avatar
    11-13-2017, 11:02 AM
    Several tuners are already pushing the new W213 generation E63 S with its 4.0 liter twin turbocharged M177 V8 and the results are impressive. Tuner PP-P Performance is showing a dyno of 734 horsepower at the crank. That is with their ECU flash tune and catless downpipes. Putting these numbers in context is somewhat difficult as their MAHA dynamometer reads very differently. The wheel output figure shows 564 whp: Far more conservative than the 656 wheel horsepower DME Tuning showed on their all wheel drive Dynojet with a Stage I tune. Hopefully we will get more dyno tests for contextual purposes but the new W213 E63 is already a tuner's dream.
    19 replies | 78 view(s)
  • Sticky's Avatar
    11-17-2017, 10:53 AM
    Well, holy crap! 8's out of the box? A 250 mph top speed? That is not all. The new Tesla roadster is said to hit 60 in 1.9 seconds and it will hit 100 miles per hour in 4.2 seconds. Those numbers are so mind numbingly fast please excuse us for being skeptical. When will it hit the market? Apparently it is being positioned as a 2020 model year car. The battery capacity is said to be good for 630 miles. Three motors will supply over 7,000 lb-ft of torque. It will start at $200,000 which for the numbers Tesla is quoting is well worth the money. Hell, it's worth double. It is going to be very hard to argue against the new Tesla Roadster if it delivers as advertised. The only downside will likely be the heft.
    13 replies | 87 view(s)
  • Bader871's Avatar
    11-17-2017, 05:01 PM
    So i recently came accross this https://www.hsd-il.com/ website and noticed they use stainless steel to make some really cheap downpipes, unfortuneatly i couldn't find any AMG downpipes there but i found some of theirs listed on Ebay (for AMG). So i contacted them to see what's up and they said they're working on their website and will have it listed. They seem to be legit at my glance but i haven't seen reviews on them, anyone with any experience with HSD-IL?
    12 replies | 80 view(s)
  • Sticky's Avatar
    11-13-2017, 03:29 PM
    An interesting Huracan comparison against the McLaren 720S here as the two Huracans in the video are actually quite different. The VF-Engineering VF800 supercharged Huracan is a rear wheel drive variant otherwise known as the LP 580-2. The twin turbo Huracan is said to be making roughly 800 horsepower to the wheels. The McLaren 720S is stock. The all wheel drive turbocharged green Huracan is up first. The Huracan hangs in well but the McLaren takes it. The roll races all have the same outcome. They try to run from a stop but it is a big letdown. The 720S jumps and the Huracan lets out. Next up is the RWD Huracan with the VF-Engineering supercharger. The RWD version actually makes more sense for roll racing as it is lighter with lower drivetrain losses. The 720S gets a jump on the RWD Huracan in the first run and pulls. The second run features a more even start but the 720S pulls yet again. Maybe it is time for a bigger Eaton TVS2650 blower? The 720S even stock is just too much for most cars to handle and that includes modified Huracans.
    8 replies | 76 view(s)
  • Sticky's Avatar
    11-16-2017, 02:11 PM
    The new 2019 Corvette ZR1 LT5 motor illustrates the point well that direct fuel injection on its own is not the best choice for a performance car. You will notice an increasing trend of high performance cars coming to the market with dual fuel injection. That means both direct and port fuel injection systems. Why both? Because direct injection quickly becomes a liability. The technology spread due to efficiency benefits not because it was better for performance. Want to disagree? Tell it to McLaren who for some reason opted not to equip the McLaren 720S M840T V8 which is absolutely vaporizing all challengers with direct fuel injection. The issue is not only do you need strong pumps capable of huge pressure the injection window shortens with RPM. That makes it a challenge to provide enough fuel at higher rpm ranges. This is exacerbated as power as added. Let's assume for a moment you buy a Ferrari 458 which has a direct injected motor that revs to 9k rpm. You might be saying, what is the problem? Well, try running ethanol through the motor. As ethanol contains less energy than gasoline while at the same time offering higher octane and cooling benefits you need to flow more of it through your fuel system. The direct injection system quickly taps out. It only gets worse if you add power. Port fuel injection does not have the same injection window or pressure issues. This is probably why McLaren does not use it on its 8000-8500 rpm motors. This is probably why Ford does not use it on the 8200 rpm GT350 Voodoo V8. This is probably why BMW M did not equip the S65 V8 or S85 V10 8250+ rpm screamers with direct injection. Manufacturers building performance engines today with direct injection are increasingly offering dual injection systems with port fuel injection. Why? To alleviate stress on the direct injection system and offer fueling headroom say with modern ethanol blends. It also reduces carbon deposits. There are pluses and minuses to both approaches. Direct injection allows motors to run at higher compression before detonation on pump fuels. This obviously provides a power and efficiency benefit. The cooling effect of direct injection is due to fuel droplets going through a phase change from liquid to gas and becoming an ignitable vapor that can be mixed with air and detonated by the spark plug. Heat is absorbed during this change providing a cooling effect which will allow a direct injection motor to run leaner. Again, this provides an efficiency benefit when it comes to fuel use. Port injection allows air flowing through the intake manifold to cool before reaching the combustion chamber while direct injection provides its cooling benefit in the chamber itself. Port injection also does not require the high injection pressure and it does not have the limited injection window which means it is easier to flow far more fuel. You can see how combining these two technologies provides the benefits of both and minimizes the downsides. Just look at the performance motors that recently entered the market with dual fuel systems: Chevrolet LT5 Audi 2.5 TFSI Audi/Lamborghini 5.2 V10 Bentley W12 Ford 3.5 Ecoboost There are other motors with dual injection not listed there but you get the idea and more are on the way. It is interesting to note that many enthusiasts on the various BoostAddict sites with direct injected motors who add power look into adding supplemental port injection systems. It is ironic that getting away from port injection quickly leads them right back to port injection once they start to add power and run ethanol. Factory dual-injection tends to provide the best of both worlds.
    7 replies | 51 view(s)
  • Sticky's Avatar
    11-15-2017, 05:10 PM
    Mercedes-AMG is essentially offering the same engine architecture in various state of tune. The M176, M177, and M178 V8 motors are all the same basic design and engine family but there are differences based on the application. For example, the M178 gets a dry sump oil lubrication system as AMG GT owners are more likely to track their cars. Plus, there is a large price premium so it makes sense the top model gets all the goodies. The C63 and E63 both have an M177 4.0 liter twin turbo V8 yet the output is very different between the two. How do they differ? W205 C63 S Displacement: 3982cc Bore x Stroke: 83mm x 92mm Horsepower: 503 Torque: 516 lb-ft Redline: 7000 rpm Compression Ratio: 10.5:1 Boost: 17.4 psi W213 E63 S Displacement: 3982cc Bore x Stroke: 83mm x 92mm Horsepower: 603 Torque: 627 lb0ft Redline: 7000 rpm Compression Ratio: 8.6:1 Boost: 21.8 psi What should immediately strike you is that the E63 S has higher boost pressure but also lower compression. Much lower compression. Why? Well, because Mercedes-AMG is cramming in a lot more air. It is the same compression ratio as the M133 four-cylinder in the CLA45 AMG. The main difference is that compression ratio and the turbochargers. As the E63 S is 500 pounds heavier plus sending power to all four wheels courtesy of 4Matic it needs much more power and torque to move it. Especially considering that it is priced above the C63 in the lineup. The new twin scroll turbochargers ensure the E63 S is making more power and torque. There is a bit of a trade off in lag but past 3000 rpm until redline there is a massive difference in area under the curve in favor of the E63 S: The Renntech tuned E63 S is making nearly 120 more horsepower than the Renntech tuned C63 S. Maybe swapping E63 turbos and manifolds onto the C63 will become popular? The E63 also gets new pistons as already highlighted plus a new intake manifold and intercooler design. There you have it.
    8 replies | 44 view(s)
  • leveraged sellout's Avatar
    11-16-2017, 03:58 AM
    Does anyone know what the hell is going on over there? I've been getting the V12 biturbo itch again, and so I decided to go to their site to see if they had anything new for that engine. Imagine my surprise when it came back as "unavailable" - every page, no matter what, site is down. I thought that was unusual. Then I went to their Facebook page, which is regularly updated, and there hadn't been an update in 2 months. I did notice, however, a spat of 3 negative reviews in the last 3 weeks, the first I've ever seen for them, to be honest. Twitter account hasn't been updated in almost a year, not much use there. Instagram hasn't really been touched except once since July with a strange post about working on old American hot rods in August. I do remember for some reason that I found this odd at the time, although for no particular reason. I then googled them to see if anything popped up in terms of what's happened, found a long, negative post on Benzworld that seems to be the same guy who left a negative review on Facebook. Basically a Hennessy-type situation. Would really be sad to hear if these guys went downhill, made some bad decisions and possibly closed up shop. I know several people that have had good work done there in years past, including building up a 1000 hp C63 that was one of the fastest in the US, if not the world. I've spoken to a couple people there on the phone about general info re: V12 AMG cars, what to look for, problem areas, maintenance, etc. Always very helpful and pleasant. Was even in contact with them about possible modifications for a car I was looking at buying at one point, and they always followed up once in a while politely to see if I was still in the market. Rather shocking to see all this sudden negative news. If anyone has any more info, would love to hear it....too bad, they were the only ones who had any type of product lineup for the V12s.
    6 replies | 69 view(s)
  • Terry@BMS's Avatar
    11-17-2017, 03:42 PM
    http://www.burgertuning.com/gps_performance_meter.html We've been involved in the testing of a nifty new product called Dragy. It's a small high speed GPS device that interfaces with your phone or mobile device via BlueTooth and allows you to accurately compute performance metrics like 0-60, 1/4 mile & trap speed, 60-130mph, 100-200kmh, etc. The resulting run files compute and validate slope, and spit out in a little graphic ready to analyze, share, etc. You charge it using a mini-USB port, with the charge lasting a few days (it only wakes up when connected to app), and then throw it on the dash and open the app when you want to start recording runs. It's magnetic so there are slicker mounting options available, but I haven't found them necessary on our test cars. I just throw it up in the corner of the windshield. We tested them at the latest Shift Sector and No Fly Zone 1/2 mile events and were very pleased with the accuracy and flexibility of the system. A few screen shots from my testing below. There are a few thousand in use in Asia with great success and we're helping introduce it to the English speaking market. The free Dragy app will be posted to the play store and apple store within a few days. If you happen to get the device before the app is posted just email us and we can send a link for it. Anyway much more info to follow, including their app based tuner leader board and other slick features, but I know you guys are going to love this thing. Wanted to make a comparison video but right now its Dragy 1, VBOX 0 Attached Images
    5 replies | 74 view(s)
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