05/15/08: Close-up of "Intimidator" exhaust (optional) for Stage 1 turbo kits: Not too quiet, nor stealth, but an incredible sound, very high pitched up top. "Sounds like a Murcielago at wide open throttle!" (Shelly Robinson)
05/14/08: Now running 5psi on Optioned Stage I kit, no traction throughout most of 2nd gear…even with 285/30's on the rear & warm temperatures.
928Turbosports on the dyno, shaking down a fresh kit installation with a few tricks on 05/10/08: 389rwhp @ 4psi. with optional T67BB turbocharger.
928Turbosports Video on the dyno, shaking down a fresh kit installation with a few tricks on 05/10/08 http://www.youtube.com/watch?v=TPNy3KPxstE
5-speed 32v S & S4 kits in-stock....top-quality, undeniable technology: 928Turbosports makes it easy to go hunting those pesky Z06's....
'85-86 928TurboSport kits: Shipping: See Stages Page Above Automatic 928's & Turbocharger kits: Starting 01/06/07, we started our mocking for our automatic single-turbo turbocharger kit. It too will include everything our normal 5-speed kits offer, with only changes in the following areas: *Turbocharger placement: because the location of the torque converter conflicts with our turbocharger placement, we've moved the turbocharger back about 30" to accommodate the Automatic 928's. *Mufflers and Catalytic Converters: Because of the lack of space underneath the automatic 928's, 928Turbosports will offer the normal muffler configuration for the Automatic 928's with a custom catalytic converter/muffler combination available (price not yet established) so that you *can* have an emissions equipment-compliant 928 if you desire. Expect these kits to be available in February, 2007. We have over 8 Years of 928 performance, 6 years supercharging 928's, plus working with tuned 911 turbo's, tweeked 944 turbo's, building 1000hp Supras, etc, that have led us to this point in the 928's life-span, so.... Extremely Efficient Power Adder: No supercharger tested has a more efficient boost curve than a properly sized turbocharger. Power is exhaust based, so peak torque comes on earlier than most supercharger kits & is non-linear as SC kits are, so your torque will always be considerably more. Peak horsepower will also be higher than the most efficient SC kit as 5psi boost on a more efficient turbocharger will yield more power than 5psi on a supercharger. Air/air intercoolers VS air/water intercoolers. Spearco highly recommends their air/water intercoolers where the application is generous in 3 ways: large & efficient intercooler, highly efficient & large heat exchanging radiator, & fast-flowing system. It is also highly recommended where an ice chest can be used to pump chilled water into the intercooler (for drag racing purposes). On the street, your air/water intercooling system is only as efficient as your heat-exchanger: a huge concern on the 928 as putting a hot heat exchanger in the nose, in front of the condensor & radiator will decrease the efficiency of each, allowing for hotter-running engine conditions if sized properly. Air flow for fender-mounted exchangers is inadequate for the size of exchanger Spearco requires for adequate BTU distribution. Luckily our air/air intercooler has proven to be very efficient w/o compromising engine temperatures. On our test car, with the lowest spring pressure possible (3psi), the observed ambient temperature in the dyno room was 85 degrees. At idle, the charged air pipe downstream from the intercooler measured 90 degrees with the pyrometer. @ 6500rpm @ 3psi, the pipe was measured via pyrometer @ 93 degrees. Charged air temperature before the intercooler was measured via pyrometer @ 6000rpm to be 139 degrees. Even with low-boost initial testing our high-flow intercooler (Spearco tested & rated to 650+hp/tq at only 1psi pressure drop) proves to be VERY efficient: obvious with our last blazingly fast 1/4 mile speed (for a 20 year old stock 928): roughly the samp MPH as twin-screw supercharged/Air-water intercooled 928's make at 2-3psi higher boost! All related performance items included! Turbocharged - Full boost @ 2500rpm, intercooled, sized efficiently for a 5.0 32v 928 motor.
Emissions-Compliant in a matter of minutes:: Tuning: Our kits are designed the way all new turbocharged cars are designed: with the turbocharger drawing air from the air flow meter, and recirculating (downstream from the air flow meter) all extra air so that your engine only ingests what it requires depending on your throttle position. This design allows seamless running conditions and on/off throttle transitions, making your car feel as stock as it can until you're on boost. The supplied Wideband O2 sensor will immediately let you know how your car is running & if fine adjustments need to be made to your fuel curve (accomplished via the adjustable regulator). Ultra-fine fuel map adjustments can be easily accomlished with or without the use of a dynomometer by using our Optional SMT-6 Piggy-back fuel (& timing) computer, a laptop computer, and your wideband O2 sensor as the basis of your tuning. Cooling: Feel free to experiment: remove your air tubes on your 928, & drive around for a day & observe your engine temperatures: heat is MUCH more free to circulate with the cool incoming air, so heat "soaking" around your engine is reduced, meaning the heat leaving your radiator is removed quicker, allowing your radiator to work more efficiently. The result is a cooling running 928. Our test cars show an observed needle change of about 3/32" on the gauge, or about 15 degree difference as observed via a pyrometer. Of course, we must acknowledge that our test car had our kit installed, so the low-restriction exhaust accompanying the kit may have helped with the reduced temperatures. Regardless, it ran MUCH cooler when on all accounts, peopled expected the car to run hotter. The placement of the turbocharger is in the air-stream of the under-body air, allowing enough heat to escape from under the car to not allow any measurable temperature differences to be measured inside the car or by touch from inside the car. This does NOT adversely affect the turbocharger's efficiency as full boost comes in well below 2500rpm! Our intercooler was designed to NOT obscure any required air entering the radiator or condensor, where the 1010cfm-flowing intercooler (@ 1.5psi pressure drop @ 650hp/1010cfm) is 3.5" think & 11" wide & tall, allowing very cool after-intercooler temperature while being small enough to not restrict air to any measurable (pyrometer) water-neck temperature or observed needle change on the temperature gauge. Ground Clearance: Our Test 928's have been lowered between 1.5" & 2". As such, we have yet to bottom out our kit on any of the MANY speed bumps or other obstacles with the 7k test miles we accumulated. If you feel such, we can provide for a small price a bump shield to cover the turbocharger's vitals, but even our oil accumulation tank has been custom-built by Boostlogic (Polished, proprietary aluminum scavenge tank) to hang higher than the lowest part of the turbocharger. Consideration of Porsche's design: To maintain the properly engineered aspects of the 928's engine, the Y-pipe has been carefully measured to offer the same "pulse-tuning" as the orignal exhaust system, allowing smooth idling & driving around town, and a more european, higher-rpm-sound to the system as you build boost. The sound is VERY 928, yet intriguingly turbocharged, sounding more like the incredible-sounding 2v 928 motors than a 4v motor. An extra oxygen sensor bung has been symmetrically placed on the driver's bank secondary pipe for use with the wide-band O2 sensor included in your kit. Security: Unlike the easy-to-steal rear-mounted turbocharger "universal kits" that can be purchased & adapted to a 928, our 928-kit keeps the primary components well out of reach of would-be thieves. To give the best, you have to incorporate the best help you may need: for us, it was an effort assisted by the below companies: www.PERFORMANCE-MOTORSPORTS.com
Do not hesitate to email for further information & the latest kit manufacturing pictures! Porschesolutions@gmail.com
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