Supercharger Performance and Engine Performance Parts

Staying with this theme of ’superchargers can have great top end’; I’ve geared this post for supercharger tuning for top end pull.

Let’s say for example you owned a 4G69 2.4 liter Lancer Ralliart. The Ralliart is a 2.4 Liter stroker motor with a massive 100mm stroke. In stock trim the car produces 168hp @ 6000 rpms and a respectable 167 ft-lbs of torque @ 4100 rpms.

The engine is a proven package which is related to the 4G63 legendary motor and the combination of this performance head with the healthy 10.5:1 Compression ratio makes the engine very responsive to modifications.

RPW (Racing Performance Works – Australia) has taken it upon themselves to boost the naturally aspirated performance of the 4G69 with a street and race header and a 3 stages of performance camshafts. The race header is what we’re interested in here due to it’s four into one design which is great for a singular increase in volumetric efficiency (and thus a nice power boost) closer to redline. The header also comes generously sized with 1.75″ primaries and a 2.5″ collector outlet, which will be needed when power output is greatly increased due to the supercharger application.

On RPW’s dyno the combination of their race-design 4-1 header, with their stage 2 camshaft, tuned cam gears, a press-bent 2.5″ exhaust system, a phenolic resin intake manifold spacer, and a computer flash increased the wheel horsepower delivered by the car from 151hp at 5750 rpm to 170hp @ 6000 rpms while holding over 165 wheel horsepower all the way to 6500 rpms.

This bolt on affair is a good starter for our top-end screamer as we have gained around 20hp and extended peak power by 750 rpms on the top end through the use of these modifications. With the most conservative estimates the engine will no be producing 188 hp @ 6000 rpms.

Enter the boost:

The ripp mods SDS EFI supercharger kit for the Lancer is built around a vortech V-5 G-trim supercharger head unit which delivers a peak boost and peak efficiency in the higher RPM ranges. The kit in stage 2 trim delivers over 8 psi to the 4G69 which in conjunction with our previous modifications can deliver over 290 crank horsepower at 6000 to 6500 rpms.

This combination of parts is all geared towards top end power (the four into one header, the stage 2 camshafts, and the centrifugal supercharger) and so the result is an engine that gains only 34 horsepower at 2500 rpms but gains over 120 horsepower at 6500 rpms (on what was originally a 168 horsepower motor).

For more information please visit:

Ripp mods
RPW

Technorati Tags: 4G69, Lancer, Mitsubishi, Ripp, RPW, supercharger tuning, Vortech

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