R34 GT-R Fuel System Upgrade: ID1050x + Walbro 460
R34 Fuel System Upgrade Complete Guide
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Nissan Skyline GT-R
BNR34 (N/A)
Power
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0-60
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Top Speed
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Current Market Value
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Expert DIY
5-7 hours
ID1050x Injectors + Walbro 460 Fuel Pump
Nissan Skyline GT-R (BNR34)Also compatible with: R33 GT-R, R34 GT-R
Estimated Cost
$2,300-$3,000
Parts: $1,800-$2,200
Labor: $500-$800
Horsepower
Enables up to 700 whp on E85, 600 whp on 98 RON pump fuel
Torque
Fuel-limited gains only — enables power not otherwise possible
Response
Improved cold start and idle with hi-Z injector drivers
Prerequisites
- • Standalone ECU mandatory (Power FC, HALTECH, MoTeC)
- • Dyno time booked before first drive
- • Fuel tank below 1/4 full for pump install
Installation Progress0%
Installation Steps
1
Disconnect battery, relieve fuel system pressure
10 min
Pull fuel pump fuse, run engine until stall, crank 5 sec to clear rail
- • Fuel vapor ignites easily — no open flames
2
Access fuel tank through rear seat bottom
20 min
3
Disconnect fuel lines from pump assembly
20 min
4
Remove pump assembly retaining ring
15 min
5
Extract pump module, install Walbro 460
45 min
6
Reinstall pump module, torque retaining ring
20 min
7
Remove engine intake to access fuel rail
1 hour
8
Remove stock 444cc injectors
20 min
9
Install ID1050x with supplied O-rings
20 min
10
Install Aeromotive FPR in return line
45 min
11
Reinstall intake manifold with new gaskets
45 min
12
Prime fuel system and check for leaks
15 min
13
Set base fuel pressure to 43.5 psi (3.0 bar) cold idle
15 min
14
Tow to dyno shop — do not drive untuned
N/A
15
Dyno tune: injector characterization, dead time, fuel map
3-4 hours
Parts Required
All parts needed for this modification
Injector Dynamics ID1050x (set of 6)
Quantity: 1 • $1,050
Walbro F90000267 (460 lph) in-tank pump
Quantity: 1 • $180
Walbro install kit for R34
Quantity: 1 • $65
Aeromotive adjustable fuel pressure regulator
Quantity: 1 • $275
Braided stainless -6 AN fuel lines
Quantity: 6 ft • $120
Fuel pressure gauge (liquid-filled)
Quantity: 1 • $40
Tools Required
Fuel rail removal tool
Rental: $15/day
Rental
AN wrench set
Rental: $20/day
Rental
Electrical crimping kit
Common
Fuel-resistant sealant
Rental
Supporting Modifications
Additional mods recommended or required for optimal performance
Fuel pressure gauge (liquid-filled)
required
Monitor rail pressure during tune and daily driving
Walbro rewire kit
required
Stock wiring harness is undersized for 460 lph pump
Fuel filter (high-flow 10-micron)
recommended
Stock filter restricts at full pump flow
Tuning Requirements
ECU Flash Required
Dyno Tune Required
Estimated Tuning Cost
$1,000-$1,500
Full remap required. Injector characterization critical for part-throttle drivability. Cold start map needs adjustment — ID1050x has longer opening time. Boot in safe base map before hitting boost.
Disclosure: We may earn a commission from purchases made through affiliate links on this page. This helps support our comprehensive modification guides. See our full disclosure policy.