MKIV TT Denso Fuel Pump Drop-In Upgrade for MKIII 7M-GTE

Fuel Systemintermediate✓ Community Verified

Problem

Stock MKIII 7M-GTE fuel pump does not provide enough flow or pressure to support higher horsepower builds with larger injectors (e.g., 550cc), and aftermarket alternatives like the Walbro 255 are loud and potentially less reliable.

Insufficient fuel delivery for upgraded injectors and higher boostNeed for higher flow and higher pressure fuel pump to support 400-500whp buildsWalbro 255 alternatives are excessively loudConcern about needing rewiring or modifications to fuel pump control system

Root Cause

The stock MKIII fuel pump is not rated for the fuel demands of builds running 550cc injectors and upgraded turbos targeting 400+ whp. A higher-capacity pump is needed, and the MKIV Twin Turbo Denso pump is the ideal choice because it is physically and electrically compatible with the MKIII fuel pump hanger and wiring.

Confidence

High confidence — Multiple community members agreed on this solution

View Original Thread →Posted December 2012 on SupraForums.com