S15 Silvia GT2871R Turbo Upgrade Guide
S15 GT2871R Turbo Upgrade
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Nissan Silvia S15
S15 (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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This vehicle will become legal to import in 0 under the 25-year exemption rule. Check our import guide for details on the process.
Expert DIY
8-10 hours
Garrett GT2871R Disco Potato Direct Replacement
Nissan Silvia S15 (S15)
Estimated Cost
$2,100-$2,700
Parts: $1,600-$1,900
Labor: $500-$800
Horsepower
+90-120 hp (330-360 whp on E85)
Torque
+60 lb-ft
Response
Slightly more lag than stock ball bearing, but faster than journal bearing upgrades
Prerequisites
- • 555cc or 740cc fuel injectors
- • Walbro 255 lph pump
- • PowerFC or standalone ECU
Installation Progress0%
Installation Steps
1
Disconnect battery, drain coolant
20 min
Lower radiator hose
2
Remove heat shield over turbo
15 min
3
Remove downpipe
45 min
4
Disconnect vacuum lines to wastegate
10 min
5
Disconnect coolant and oil lines
30 min
6
Remove intake piping from turbo
20 min
7
Unbolt turbo from manifold (4 nuts)
30 min
8
Extract stock T28 turbo
15 min
9
Clean manifold surface
10 min
10
Prime GT2871R with oil
10 min
11
Install GT2871R with new gasket
30 min
12
Reconnect oil, coolant, vacuum
45 min
13
Reinstall downpipe and heat shield
30 min
14
Refill coolant
15 min
15
Dyno tune
4-6 hours
Parts Required
All parts needed for this modification
Garrett GT2871R ball bearing turbo
Quantity: 1 • $1,550
T28 flange gasket
Quantity: 1 • $20
Oil feed line -4 AN braided
Quantity: 1 • $45
Coolant lines
Quantity: 2 • $60
Tools Required
Metric sockets
Common
Long extensions
Common
O2 sensor socket
Rental: $10/day
Rental
Supporting Modifications
Additional mods recommended or required for optimal performance
555cc-740cc fuel injectors
required
Stock 480cc max at 290 whp
Walbro 255 lph
required
Stock pump inadequate
3-inch downpipe
recommended
Stock downpipe is restrictive
Front-mount intercooler
recommended
Stock TMIC heat soaks
Tuning Requirements
ECU Flash Required
Dyno Tune Required
Estimated Tuning Cost
$800-$1,200
PowerFC or HALTECH required. Dyno tune mandatory. Target boost 1.3 bar for 350 whp on E85.
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S15 GT2871R Turbo Upgrade
From the shop
Browse the shop →Original JDM designs, made to order.
