S13 Silvia Garrett GT2860R Turbo Upgrade Guide
S13 Garrett GT2860R Turbo Install
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Nissan S13 Silvia / 240SX
S13 (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
8-12 hours
Garrett GT2860R (Disco Potato) Ball Bearing Turbo
Nissan S13 Silvia / 240SX (S13)Also compatible with: S14 SR20DET, S15 SR20DET
Estimated Cost
$1,900-$2,600
Parts: $1,400-$1,800
Labor: $500-$800
Horsepower
+80-120 hp (280-330 whp on E85)
Torque
+60 lb-ft
Response
Full boost 3,800 rpm (vs stock T25G 3,500)
Prerequisites
- • Fuel injectors upgraded (555 cc minimum)
- • Walbro 255 lph fuel pump
- • Standalone ECU or PowerFC
- • Upgraded intercooler recommended
Installation Progress0%
Installation Steps
1
Disconnect battery
5 min
Negative terminal
2
Drain coolant
15 min
3
Remove heat shield over turbo
15 min
4
Unbolt downpipe from turbo
45 min
5
Disconnect all vacuum and wastegate lines
20 min
6
Remove intake piping and MAF
20 min
7
Disconnect oil feed line from top of turbo
10 min
8
Disconnect oil drain from bottom
15 min
9
Disconnect coolant lines
15 min
10
Unbolt turbo from manifold (4 nuts)
30 min
11
Extract stock T25G turbo
15 min
12
Clean manifold mating surface
10 min
13
Prime GT2860R with engine oil
10 min
14
Install new T25 gasket and GT2860R
30 min
15
Reconnect oil, coolant, exhaust
1 hour
16
Refill coolant, dyno tune
4-6 hours
Parts Required
All parts needed for this modification
Garrett GT2860R ball bearing turbo
Quantity: 1 • $1,450
T25 flange turbo gasket
Quantity: 1 • $20
Braided oil feed line -4 AN
Quantity: 1 • $45
Braided coolant lines
Quantity: 2 • $60
Tools Required
Metric sockets
Common
Penetrating oil
Common
O2 sensor socket
Rental: $10/day
Rental
Supporting Modifications
Additional mods recommended or required for optimal performance
555cc or 740cc injectors
required
Stock 370cc inadequate for 300+ whp
Walbro 255 lph pump
required
Stock 185 lph insufficient
Front-mount intercooler
recommended
Stock intercooler heat soaks quickly
Standalone ECU or PowerFC
required
Required for tuning
Tuning Requirements
ECU Flash Required
Dyno Tune Required
Estimated Tuning Cost
$800-$1,200
Dyno tune required. Target boost 1.2-1.4 bar for 300+ whp. E85 fuel unlocks full potential.
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.