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  • Sticky's Avatar
    Yesterday, 03:13 PM
    It feels like the US RS7 1/4 mile record only stood for a few minutes before being broken yet again. A few days ago AudiBoost posted an article on the quickest and fastest US RS7 at the time which ran 10.558 @ 132.56 in the 1/4 mile. The time and trap speed to beat now is 10.388 @ 133.54. The difference between this run and the previous run is that in addition to the APR Race gas software the RS7 in the video below also has a full exhaust system. Keep in mind this is still the APR Stage I software and a more aggressive software tune is on the way from APR (and others). At this rate we will see 9's out of the RS7 with bolt ons very soon.
    11 replies | 164 view(s)
  • Sticky's Avatar
    Yesterday, 02:13 PM
    Developments in the BMW F-Series flash tuning scene are proceeding faster than expected. Earlier this month BimmerBoost brought you the story that BMW F-Series Infineon tri-core ECU's had been cracked and the various cracks have spread like wildfire to tuners throughout the globe. Jailbreak Tuning posted flash tune results on 91 octane for the F10 M5 S63TU V8 and the numbers are very encouraging even at this early stage. Peak power went up from the 539 wheel horsepower baseline (with aftermarket downpipes) to 617 wheel horsepower for a gain of 78 horsepower at the wheels. The tune deletes the CEL (check engine light) caused by the downpipes. The torque figure rises from 507 lb-ft at the wheels to 567 lb-ft at the wheels. Torque gains are seen throughout the entire curve once the turbos spool. F10 M5 tuning and S63TU V8 tuning is ready to take the next step forward. 2015 is going to be very interesting for BMW aftermarket performance.
    7 replies | 277 view(s)
  • Sticky's Avatar
    Yesterday, 08:32 PM
    Cadillac has leaked out that they will debut the next generation CTS-V at the Detroit Auto Show taking place next month or more accurately in just over three weeks. Considering how powerful Cadillac's European competition is they need to pack some serious heat. They intend to as the C7 Z06 LT4 6.2 liter supercharged direct injection V8 is expected under the hood. This raises the question as to whether the CTS-V will get the exact same LT4 or if there will be changes much like the previous generation CTS-V saw to its LSA V8 compared to the LS9 it was based on which saw use in the ZR-1 Corvette. Let's think positively for a moment that the CTS-V will not be detuned. That means 587 rear wheel horsepower for the CTS-V or in other words more than any of its competition. It will likely be mated to the 8L90 automatic transmission which offers incredibly quick gear changes meaning GM is likely to have the fastest luxury performance sedan in the world if they manage to keep the weight from ballooning. We will know more next month but let's hope GM gives the CTS-V the LT4 without any changes and if they do make any changes they only do so to give it more, not less, power and torque.
    2 replies | 39 view(s)
  • Sticky's Avatar
    Yesterday, 10:45 PM
    The C6 ZR1 and C7 Z06 have engines have some similarities. They both have the same 6.2 liter displacement and both are supercharged V8 engines. The similarities pretty much end there though as they are two different generations of GM supercharged V8's. The LT4 of course incorporates direct injection which allows higher compression at 10.0:1 compared to the 9.1:1 of the LS9. The LT4 also has a smaller 1.7 liter supercharged compared to the LS9 2.3 liter unit. It is quite a bit smaller but also 20 pounds lighter. They both have the same 6600 rpm redline. Let's break down each motor with GM's own details: LT4 6.2L supercharged engine specifications Displacement (cu in / cc): 376 / 6162 Bore & stroke (in / mm): 4.06 x 3.62 / 103.25 x 92 Block material: cast aluminum Crankshaft: 1538MV steel Connecting rod (in / mm): 6.125 / 155.5 powder-metal steel Piston: forged aluminum with internal ribs; flat-top crown Cylinder head material: A356-T6 rotocast aluminum Induction system: 1.7L supercharger 9.4 psi / 0.65 bar max boost Valvetrain: overhead valve, two valves per cylinder Valve type (intake / exhaust): 54mm solid titanium / 40.4mm sodium-filled Camshaft type: hydraulic roller Intake valve lift (in / mm): 0.492 / 12.5 Exhaust valve lift (in / mm): 0.551 / 14 Duration @ 0.050-in. tappet lift (crank angle degrees, intake / exhaust): 189 / 223 Camshaft lobe separation angle (degrees: 120 Fuel delivery: direct injection Fuel injectors: 25cc/second (1.5L/min) Engine-driven fuel pump (psi / MPa): 2900 / 20 Lubrication system: dry sump, incl. oil-spray piston cooling Compression ratio: 10:1 Horsepower (hp / kW @ rpm): 650 / 485 @ 6400 SAE certified Torque (lb-ft / Nm @ rpm): 650/ 881 @ 3600 SAE certified Max. engine speed (rpm): 6600 Recommended fuel: premium required LS9 6.2L supercharged engine specifications The LT4 is rather at 650 horsepower and 650 lb-ft of torque despite the smaller blower. The LS9 is rated at 638 horsepower and 604 lb-ft of torque. The difference between the two in practice at the wheels is even greater than the crank ratings on paper: 49 wheel horsepower and 84 lb-ft of torque at the wheels difference in favor of the LT4 over the LS9. These numbers really make one wonder why the C7 Z06 is not putting up better performance numbers.
    2 replies | 38 view(s)
  • Sticky's Avatar
    Yesterday, 01:51 PM
    If you are an avid reader of this network (and you should be) then you remember an article from a few months back of a 991 Turbo S versus a Lamborghini Aventador in a standing kilometer drag race. The 991 Turbo S won the drag race but the Aventador had the higher trap speeds meaning it was pulling harder up top. That standing kilometer result means that from a roll the Aventador should win against a stock 991 Turbo S. Well, last month we happened to see an Aventador go up against two 991 Turbo S models. The Aventador beats both of the 991 Turbos. So what happens if the 991 Turbo S gets a tune and full exhaust? What you see below. From both a stop and a roll the 991 Turbo S pulls the Aventador and it does so easily. The run from a stop does not feature a launch from either car though and they simply mash the gas. Despite having 'only' a 3.8 liter flat-6 engine versus the Aventador 700 horsepower 6.5 liter V12 the Porsche's turbochargers give it the advantage. It certainly does not hurt it weighs roughly 500 pounds less and has a dual clutch transmission.
    1 replies | 146 view(s)
  • Sticky's Avatar
    Yesterday, 01:25 PM
    It is no secret we are fans of the Hellcat V8. How can you not be? Underrated 707 horsepower? Twin screw 2.4 liter blower? Forged internals from the factory? Yes to all of that! Now the question is what other cars will the Chrysler group shove the Hellcat supercharged V8 into? Jeep ruled out a Hellcat Cherokee for 2015. That does not mean we will not see one eventually though. Any holdup is likely due to trying to figure out how to get the transmission and all wheel drive drivetrain to hold the massive torque. Considering how big of a hit the Hellcat V8 is it only makes sense to stuff into a Cherokee. Maybe even a RAM as well if we really get lucky.
    0 replies | 51 view(s)
  • leveraged sellout's Avatar
    Today, 05:31 AM
    Holy sh* about a giant slayer. Bring on the F12s. Aventador really starting to show its age already...apparently this spring we will be seeing an SV model, and hopefully a heavy facelift soon after. Needs a proper (dual clutch) transmission, ~760-770 hp, full digital dash like the Huracan, bit nicer interior in general, LED headlights, maybe some tweaks in the suspension. And of course whatever they want aesthetically, they know what they're doing there. All that, it would be worth its price again. Right now, it just isn't. F12 at 85k less is a far superior car, and so is a 911 Turbo S for ~40% of the price.
    1 replies | 146 view(s)
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