How Rennen ITB systems perform in documented customer engines. Results reflect each complete build - compression, cams, ignition and exhaust all play their part, and every engine was calibrated properly on a standalone ECU.
“They really help bring out the power of this engine.”
Complete build:
Peak: 271 hp at 7,091 rpm · 279 Nm at 6,164 rpm. Dyno sheet available.
“…and they sound amazing above 4,000 rpm.”
Complete build:
Power and torque both improved across the range. Dyno sheet available.
“Now the car just picks up and goes!”
Build:
Much faster throttle response on an otherwise standard engine. Dyno sheet available.
“What a quality product, a piece of art just to look at.”
Build:
Dyno sheet available.
Gains shown are for complete engine builds, not the throttle bodies in isolation. Your result depends on your specification and calibration - tell us about your engine and we’ll advise honestly. Built on Rennen ITB? We’d like to feature your documented build.
The Rennen test programme is not limited to dyno pulls. The system is being validated through real rally use - on tarmac and on gravel - with Rennen Motorsport, the Adelaide Porsche specialist workshop that handles testing and installation, because a clean workshop and a short dyno run prove very little about how an induction system lives.
A tarmac rally car doesn’t live at wide-open throttle. It has to idle, crawl through liaison sections, queue, heat-soak, restart - and then immediately perform under high load.
Gravel rally is ugly, hot, dusty and cruel - exactly why it’s valuable. Any intake system can look good in a clean workshop; weak parts get exposed quickly out here.
Slow-speed liaison sections, heat-soaked crawling, repeated restarts, dusty and muddy gravel conditions, and sustained high-RPM stage running - that combination is exactly what a performance intake system must survive to be credible outside a show-car environment.
Gravel and tarmac validation also tests the supporting system: ITG filtration, injector behaviour, ECU calibration and MoTeC data logging. In dusty or heat-soaked rally conditions, the intake system must do more than make power - it must remain stable, protected and repeatable. Documentation from the programme will be published here as it accumulates.
That unmistakable induction note above 4,000 rpm is part of what makes these engines special.
Video - Porsche 2.7 on Rennen ITB, dyno pull · coming soon
Sound - induction note above 4,000 rpm · coming soon
Every quotation is matched to your displacement, cylinder heads and engine management. Custom bore sizes are available on request.