Gallery · The complete photoshoot

MADE IN
DENMARK.

From CFD simulation to billet machining, hand assembly, foam-cased packaging and the engine bay of an air-cooled 911 - every stage of a Rennen ITB system. Tap any photo to view it full screen.

Rennen ITB six-cylinder elliptical roller-barrel throttle body bank with velocity stacks, CNC-machined and hand-built in Denmark — Rennen ITB · engineered & made in Denmark

Stage 01 · Engineering & R&D

CFD flow simulation of the Aerobarrel throttle body at 20, 40 and 90 degree openings — CFD flow simulation · 20° / 40° / 90°

CAD section of the elliptical roller barrel inside the tapered throttle bore — CAD · roller barrel section

CAD section of the head flange showing the Viton O-ring sealing groove — CAD · Viton sealing

Stage 02 · Production - built by hand in Denmark

Measuring CNC-machined Rennen ITB billet components with digital calipers at the machine in Denmark — On the machine · in-process inspection

Hand-assembling a Rennen ITB bank at the JSR Engineering workshop bench in Denmark — JSR workshop · hand assembly

Setting the throttle linkage on a hand-built Rennen ITB system — Linkage set-up · Denmark

JSR technician assembling a throttle body bank on the bench — Bench build · JSR Engineering

Fitting an elliptical roller barrel into a CNC-machined throttle body — Barrel into body · by hand

Stage 03 · The product

Triple throttle body bank, front view — Triple bank · front

Triple throttle body bank, hard-anodised gunmetal grey — Hard-anodised · gunmetal grey

Throttle body bank with tall velocity stacks, three-quarter view — Three-quarter · tall stacks

Single roller-barrel throttle body with velocity stack — Single body · front

Single Rennen throttle body with velocity stack, rear actuation side — Single body · actuation side

Top-down view of velocity stacks fitted with mesh filters — Top-down · mesh screens

Rennen ITB trio with mesh-filtered velocity stacks, top-down on the bench — Trio · mesh-filtered stacks

Through the bore: elliptical roller barrel with no shaft or plate in the airflow — Through the bore · Aerobarrel

Looking down a Rennen velocity stack into the clear elliptical bore — Down the stack · clear bore

Rennen ITB billet throttle actuator and mounting bracket on a roller-barrel throttle body — Throttle actuator · billet bracket

Rennen ITB throttle linkage with return spring, rod ends and billet arm — Throttle linkage · rod-ends & spring

Stage 04 · Packaging

Complete Rennen ITB kit in custom-cut foam inside the hard transport case — The complete kit · custom foam

Top-down view of throttle bodies and stacks in custom-cut foam — Custom-cut foam · top-down

Rennen ITB throttle bodies with mesh-screened velocity stacks and linkage in a custom-cut foam case — In the case · mesh-screened stacks

Rennen ITB hard case opened on the Rennen Plus stand — Case open · on the stand

Stage 05 · Installed

Rennen ITB system with six velocity stacks installed in a Porsche 911 engine bay — 911 engine bay · six stacks

Velocity stacks around the cooling fan of an air-cooled 911 — Around the cooling fan

Rennen ITB installation in a dark blue air-cooled Porsche 911 — Installed · air-cooled 911

Hand adjusting a Rennen ITB system in the engine bay — Set-up · in the bay

Customer 911 engine bay fitted with a Rennen ITB system — Customer build · green 911

Stage 06 · On the road

The JSR Engineering team with a Rennen ITB throttle body bank — JSR Engineering · the makers

Rennen ITB system fitted with an ITG air filter on the display table — ITG filtration option · fitted

Visitors examining a Rennen ITB system at an event stand — On the stand · in hand

Guests handling a Rennen ITB throttle body bank at an event — First contact · event

Opening a Rennen ITB case at the Rennen Plus stand — Unboxing · Rennen Plus stand

Rennen Plus event booth with Rennen ITB systems in hard cases — Rennen Plus · the stand

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