SR20 Engine Review
Home: SR20 Engine Review
The SR20 is Nissan premiers 4 cylinder production motor. Available in both Turbo and Non-Turbo variants, with the late model versions having variable valve timing. Maintaining current design theories of a 16-valve twin cam motor, the SR20 cheats by only having four lobes on each cam. Each lobe runs an 'A' shaped rocker and thus each lobe activates two valves, this is system can possibly be attributed to the smooth cam grinds that the SR20 uses, this also leads to the SR20 being such a smooth motor. Known for having a linear progression of power, combined with excellent
response and driveability the SR20 is ideal for any conversion whilst
also being substantially lighter than a FJ20 due to the alloy block.
There are a number of different variants of the SR20 depending on
the model of car it came from. Different manifolds, different rocker
size rocker covers, different colour rocker covers that actually
distinguish power, direct fire and distributor versions plus those
with and without variable valve timing. For a huge amount of information
on SR20's in general check out the following site that is dedicated
to SR20's. http://www.lycaeum.com/sr20/sr20de.html
|
Engine |
Model |
Power (kW) |
Torque (N.m) |
Notes |
|
SR20DET |
S13 |
153@6000 |
274@4800 |
180SX, Red cover, direct fire, long curved inlet manifold, RWD |
|
SR20DET |
S13 Late |
Black cover, direct fire, long curved inlet manifold, RWD |
||
|
SR20DET |
S14 |
165@6000 |
274@4800 |
Deep Black sloping cover, direct fire, straight manifold, variable valve timing RWD, Australian 200SX |
|
SR20DET |
N14 GTiR |
Red cover, distributer, quad throttle bodies, 4WD |
||
|
SR20DET |
U13 |
Red cover, distributer, 4WD |
||
|
SR20DET |
U12 |
Red cover, Rally Special - had a factory roll cage!!, 4WD |
||
|
SR20DE |
U14 |
112@6400 |
186@4800 |
FWD Bluebird |
|
SR20DE |
S13 |
105@6400 |
123@6000 |
Silver cover, direct fire, long curved manifold, RWD |
|
SR20DE |
S14 |
120@6400 |
188@4800 |
Silver cover, direct fire, straight manifold, variable valve timing, RWD |
|
SR20DE |
HP10 |
112@6400 |
186@4800 |
Silver cover, distributer, FWD |
|
A modified SR20 is very easy to do in the way of known methods and availability of cams etc. Good power can be made from both naturally aspirated (250hp+) and from turbo variants (600hp+). The SR20 is currently still being used as a racing motor in many production cars, primarily in the UK, USA and Japan. |
The above was an extract from
|
|
© June 2002 Contact Information |