Young Version — August 1999
An archive project by Flock MFGNew issue alerts →
About this issue
The August 1999 issue of Young Version explores drift setups versus grip tuning through 22 shop demo cars, including S15 Silvias from Mine’s and Kazama Auto. Features cover front-wheel-drive builds taking on high-powered 4WD rivals, choosing a first drift car, and reviving a used AE86 Trueno on a ¥1 million total budget. Suspension fundamentals, engine-oil selection, rotary maintenance, new-parts tests, and reports from Hiroshima and California round out this look at Japan’s late-1990s tuning scene.
242 available scans from Young Version — August 1999, in right-to-left reading order. Japanese OCR and English translation drafts are available throughout. Drafts have not received exhaustive image proofreading; unreadable source remains recorded in the archival data.
Page 69 — English draft translation
Captions and page details
YV RPS13 One-Eighty
The Ultimate S15 Light-Tuning Build Diary: Special Feature
266.4ps!
At 1.2 kg/cm² boost
GPSPORTS
Measured power [PS]
FILE:
ps
Corrected power [PS]
Air-fuel ratio
Power loss [PS]
Corrected torque [kg·m]
3.00
kg/cm
kg/cn
39.2kgm
266.4PS
296.9p9
HAX->
kgm
60
600
20.0
Intake pressure [kg/cm²]
Exhaust pressure [kg/cm²]
2.00
200
17.5
DUNLOP
YOUNCVERSION
1:88
8.88
0
15.0
=1:88
12.5
-200
It’s said that the later S13 models, with the round-taillight body, had fewer variations in engine quality. The S13 SR20DE has a lower compression ratio than the S14 and lacks variable valve timing.
270 Km/h
202
135
68
0
10.0
YV’s representative S13, the One-Eighty, uses stock injectors…
The most basic boost-up setup, using the stock [injectors] and fuel pump.
In terms of power, at 1.2 kg/cm² boost…
…and makes 266 PS. As you can see in the turbo photo at the top of the right-hand page…
As the turbo photos on the right page show, the stock S14/S15 units…
On the chassis-dyno graph above, boost (green line)…
…the stock turbo is clearly smaller than the S14/S15 units.
which appears to be due to insufficient flow from the S13 turbo.
…falls to around 0.8 kg/cm² at high rpm,
YV’s car has an exhaust setup with Yasio Factory’s 80φ front pipe and straight-through muffler…
YV car: main specifications!
（370cc）
Factory original
Injectors
Turbo
Trust front-mount, twin-core intercooler
1/C
Fuel pump
Airflow meter
SARD trigger
Other
Both cars have stock-turbo boost-up setups!
We’ll test what the S15 turbo can really do with these two cars!
Currently at 1.2 kg/cm² boost
Taniguchi’s S14
300.0ps!
Silvia
Measured horsepower [PS]
Power loss [PS]
。
Corrected horsepower [PS]
3.00
kg/cm
kg/cn
38.3kgm
300.0PS
FILE:YASIOS14.DAT
MAX->
PS
kgn
60
600
20.0
Corrected torque [kg·m]
Intake pressure [kg/cm²]
Air-fuel ratio
Exhaust pressure [kg/cm²]
2.00
30
400
17.5
1:88
200
15.0
8.00
12.5
=1:88
217 Kmh
163
108
54
0
-200
10.0
Unlike the lightly modified YV car, Taniguchi’s S14 has 550 cc injectors…
…a GT-R fuel pump and HKS Step 1 cams (IN…
For the muffler, he chose a JIC unit with a 6.3-inch main pipe; the front pipe is an Auto Produce BOSS part.
…(IN 256° / EX 264°), plus an extension pipe…
…and is the ultimate stock-turbo boost-up setup, fitted with a [brand] equal-length exhaust manifold…
…boost-up setup! By the way, before swapping to the S15 turbo…
…power was 300 PS at [boost] (maximum boost 1.2 kg/cm²…
Taniguchi’s car: main specifications!
…at that setting). Whew, Taniguchi…
…car is an early model, but…
550cc
Factory original
Turbo
Injectors
…only the engine has been changed to the later version…
…has been swapped for a later-model unit…
R33GT-R
Factory original
Airflow meter
Fuel pump
…that’s what’s installed.
HKS cams (IN 256° /
Trust front-mount intercooler
1/C
Other
…the turbo performance as much as possible…
To compare the difference, Taniguchi’s car and…
EX 264°), metal head gasket…
HKS EVC…
…socket, QS throttle…
YV’s car before the turbo swap…
Before and after, both cars… with Yasio’s ECU…
…were tuned to the same settings.
71