Field Report: 800hp ALL MOTOR Club Racer.
About this episode
At the Optima Ultimate Street Car Challenge, Jake shares insights about his impressive naturally aspirated C5 Corvette, which boasts 800 horsepower without forced induction. He discusses the benefits of a big cubic inch engine, the importance of weight distribution, and the unique adjustable intake manifold that enhances performance. The conversation also covers engine management choices, including the use of a GM ECU for better drivability, and the switch to a BMW ABS system for improved braking reliability. Jake's experience highlights the advantages of innovative engineering in competitive racing.
No boost, no worries! This C5 Corvette is filling the trophy cabinet on displacement alone.
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Jake Rozelle's C5 Z06 Chevrolet Corvette is no stranger to the Optima Ultimate Street Car Invitational having taken victory previously in what is a well setup street driven race car. The 800hp (to the crank) 7.2L/440cu Lingenfelter Eliminator R Spec LS7 contains forged rotating assemblies, CNC-ported cylinder heads, competition-grade fasteners, precision balance procedures & hydraulic roller camshaft internally, as well as a Dailey Engineering dry sump, Performance Design intake manifold with some tuning being done to the intake runner lengths over time. With just oil changes over the last 2 seasons of racing it certainly seems to be a package that is working well for Jake in this application.
The hydraulic cam profile is in its element with the 8,000rpm redline being within the comfort zone and the 14:1 compression engine runs E85 via a flex fuel setup in street form and Ignite Ready 90 on race day. Engine management is done by a GM ACDelco E92 ECU from a later model vehicle of the Cadillac CTS-V & Corvette C6 ZR1 era.
While an advantage of retaining a OEM GM ECU originally was the ability to keep features like the stock ABS system, Jake has since gone the popular route of fitting an aftermarket/standalone $1200 MK60 ABS system with an off-the-shelf tune from CSL Performance and he gives us some insight into the installation and use of such an ABS system which are becoming more and more popular at club level racing despite the initial push back from the good old armchair racers we've seen over the years.
Chevrolet C5
"...treet Car Challenge, and behind me is this purple C5 Corvette. This won the competition outright last ..."
Cadillac Ctsv
"...r. It's what comes in the newer C6 ZR1s and newer CTSV Cadillacs. So it's an E92 GM ECU."
Corvette C6 Zr1S
"...a GM based computer. It's what comes in the newer C6 ZR1s and newer CTSV Cadillacs. So it's an E92 GM ECU."
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