JDM Engines to Swap into a Nissan 240SX – Yahoo Voices – voices.yahoo.com

24 May 2015 | Author: | Comments Off on JDM Engines to Swap into a Nissan 240SX – Yahoo Voices – voices.yahoo.com
Nissan 240SX

JDM Engines to Swap into a Nissan 240SX

JDM Engines to Swap into a 1989-1998 Nissan 240SX – While there are many engines that can be mounted into Nissan 240sx chassis, there are five common JDM swaps. To start, the stock engine is either the KA24E or KA24DE. While the KA engine is stout and capable of producing a lot of horsepower, it is not commonly used as a performance or tuner engine. The five most common engines swapped into a 240sx are as follows:


This was the last version of the CA series engine to be released. It is a 1.8 liter turbocharged and intercooled four cylinder engine with an aluminum 16 valve head. The turbocharger was a Garrett T25 (.48 A/R). The CA18DET produced 166 horsepower and 166 lb-ft of torque in stock form.

Bore and stroke are nearly identical, the bore is 83 mm and the stroke is 83.6 mm. The design of this new CA engine allowed it to turn very high rmps with the redline set at 7600 rpms.

This engine is know for very fast turbo spool, torque production and the high rpm capabilities. There are several records of modified CA’s producing over 500HP.

This version of the CA engine was used in these vehicles:

Nissan Silvia/180SX from 1989-1990

Nissan Bluebird RNU12 from 1987-1989

Nissan Silvia S12 from 1987-1988

Nissan 200SX (Europe) from 1989-1993


The SR20DET is the most common swap and probably the most commonly imported JDM engine. This engine replaced the CA18DET in the Nissan Silvia and 180SX and is also a turbocharged and intercooled four cylinder engine. There are many variations of the SR20DET and it was featured in many Nissan vehicles. While it was featured in many vehicles, the most common are as follows:

Nissan Silvia from 1991-2002

Nissan 180SX from 1991-1997

NIssan Bluebird from 1989-1995

Nissan Pulsar GTI-R from 1990-1994

There are many different variations with stock power ranging from 201 hp to 245 hp and stock torque ranging from 202 lb ft to 210 lb ft. The different variations are generally recognized by the valve covers. The first line of production is commonly called a red top due to the red valve covers. This variation was released in the Nissan S13 Silvia, S13 180SX, Bluebird and Pulsar. Next you have the SR20DET Blacktop.

There are several variations of the blacktop which was first released in the 180SX and S13 Silvia in 1994. The next variation of the blacktop was the S14 blacktop. This model was released in the S14 Silvia and is generally separated from the S13 blacktop model by the angled back of the valve covers. The S14 blacktop has an upgraded Garrett T28 turbo from the previous Garrett T25.

The last variation is the S15 blacktop. The S15 had the highest horsepower rating in stock form at 245 hp. The S15 blacktop kept the Garrett T28 turbo but the boost was raised to 11psi. The next major change was not with the engine but the transmission that was mounted to it. The 5 speed transmission was dropped for a new 6 speed tranny.

The S15 model is very sought after and much higher priced than the other models.

Nissan 240SX

The last three engines are all different variations of the RB series engine most commonly used in the highly sought after Nissan Skyline. The engines I’m referring to are the RB20DET, RB25DET and RB26DETT. All three of these engines are inline 6 cylinder engines with incredible power capabilities and the ability to turn very high rpms.


This is the smallest of the three engines. This variation is a 2.0 liter inline six cylinder with a redline of 7600 rpms. Stock power ratings are 214 hp and 194 lb ft of torque it came with a 5 speed manual transmission and most commonly came in the R32 Skyline.


This variation is a 2.5 liter inline 6 cylinder engine that started production in 1993. They were most commonly used in the R33 Skyline and are very similar to the RB26DETT. The RB26 obviously has much better turbo setup and is .1 liter larger in displacement, however the internals are similar.

There are records of 500+ hp RB25 engines with stock internals. The stock turbo is a Garrett T28, this is a great engine with enormous possibilities however it’s not quite Godzilla (RB26) and it can not rival the ease of dropping an SR20 into a 240SX.


This engine is the obvious kind of the mountain! It is a 2.6 liter inline 6 cylinder with a twin turbo setup. The engine was first released in the 1989 R32 Skyline GT-R and remained the power plant for the R33 GT-R and R34 GT-R. The RB26 had 6 individual throttle bodies as opposed to a single throttle body setup. The stock horsepower rating was 277 hp since the Japanese manufacturers had mad an agreement to keep cars below 280 hp.

Despite this, many people claim that the RB26 produced more than 277 hp. The stock torque rating was 293 lb ft. This engine is known to be able to create above 600 hp without modifying the internals parts, but simply with a larger turbo setup and correct tuning.

There are also several articles and records of this engine creating more than 1000 hp in modified form.


While all of these engines can be dropped into any 240SX, the stock KA engine is perfectly capable of producing enough horsepower for your needs. Unless you are working towards being a dyno queen. The easiest and most commonly known swap is the SR20DET.

It drops in and mounts up directly without offsetting the weight of the 240SX. The main modification necessary to swap an SR20 into your 240SX is to have the wiring harness modified.

In order to swap to any of the RB series engines much more money and custom modifications will be necessary. This article is meant to serve as a general outline to steer you in the right direction if you are interested in performing a swap but are unsure of your options. If you truly want to do the swap it should be done by a professional or someone with adequate mechanical skills. Continue to research and make sure you know what you are getting into.

Many people don’t realize the complexities of performing a swap and get in over their heads and have to sell their projects. Research well and good luck!

Nissan 240SX
Nissan 240SX
Nissan 240SX
Nissan 240SX
Nissan 240SX
Nissan 240SX
Nissan 240SX
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