Here, we will investigate the characteristics and characteristics of this engine by referring to the data of the naturally aspirated engine of K10A type installed in Suzuki’s MA64S type Wagon R Solio 1.0S 2002/06 model.
| K10A Engine Specifications | |
| Vehicle model | LA-MA64S type |
|---|---|
| Car name & grade | Wagon R Solio 1.0S |
| Engine model | K10A |
| type | In-line 4-cylinder |
| Displacement | 996cc |
| Inner diameter x stroke | 68.0mm x 68.6mm |
| Bore stroke ratio | 1.01 |
| Single cylinder volume | 249.1cc |
| Compression ratio | 10.0 |
| Intake method | Naturally aspirated |
| Fuel used | Regular gasoline |
| Maximum output | 70PS / 7000rpm |
| Maximum torque | 9.7kgm / 4500rpm |
First of all, as a basic structure, the K10A engine is a long stroke engine with a bore (inner diameter) of 68.0 mm, a stroke (stroke) of 68.6 mm, and a bore stroke ratio of 1.01 (the stroke amount is larger than the piston diameter).
Strictly speaking, if the displacement and the number of cylinders are the same, it is not allowed to call yourself a square type unless the bore and stroke are exactly the same, but if the bore stroke ratio is so close to 1, “Already It’s okay to make it a square type! ”
These engines retain the flavor of short stroke type or long stroke type, but in fact, they have characteristics that are as close as possible to square type.
Among the models registered on this site, the oldest model equipped with the K10A type naturally aspirated engine is the first Wagon R wide [MB61S type | 1998/05] released from 1997/02 , and the newest model is.
It is the 2nd generation Wagon R Solio [MA64S type | 2002/06] released from 2000/12 , and 8 types of NA cars are registered.
Evaluation from the viewpoint of transient characteristics and liter equivalent horsepower
| Image of engine performance curve | |
|---|---|
 | |
| Changes in horsepower | 60.9PS → 70PS |
| Transition of torque | 9.7kgm → 7.2kgm |
| Liter horsepower | 70.28PS / L |
| Litter torque | 9.7kgm / L |
The Wagon R Sorio’s in-line 4-cylinder 996cc engine with a compression ratio of 10.0 and regular gasoline specifications, which is the reference vehicle for this time, produces a maximum output of 70 horsepower at 7,000 rpm and a maximum torque of 9.7 kgm at 7,000 rpm.
If you know the horsepower and the number of revolutions, you can know the torque, and if you know the torque and the number of revolutions, you can know the horsepower. The torque at 7000 rpm is 7.2 kgm.
The horsepower per liter of displacement is 70.28PS / L and the torque is 9.7kgm / L, and the horsepower per cylinder (single cylinder volume 249.1cc) is 17.5PS and the torque is 2.4kgm.
When the K10A naturally aspirated engine is applied to a 10-step evaluation based on deviation values aggregated from all NA vehicles registered on this site, the evaluation is ” standard ” with a converted horsepower of [ 5 ] and a converted torque of [ 6 ]. It is categorized as an engine with a typical output (bottom of the middle).
Displacement increase, compression ratio increase, bore stroke ratio change
| Normal displacement and compression ratio | ||||
|---|---|---|---|---|
| Bore | Stroke | Displacement | Compression ratio | B / S ratio |
| 68.0 | 68.6 | 996cc | 10.0 | 1.01 |
| Displacement expansion by bore up | ||||
| 68.5 | 68.6 | 1011cc | 10.1. | 1.00 |
| 69.0 | 1026cc | 10.3 | 0.99 | |
| 69.5 | 1041cc | 10.4 | 0.99 | |
| 70.0 | 1056cc | 10.5 | 0.98 | |
| 70.5 | 1071cc | 10.7 | 0.97 | |
| 71.0 | 1086cc | 10.8 | 0.97 | |
| Displacement expansion by increasing stroke | ||||
| 68.0 | 69.6 | 1011cc | 10.1. | 1.02 |
| 70.6 | 1026cc | 10.2 | 1.04 | |
| 71.6 | 1040cc | 10.4 | 1.05 | |
| 72.6 | 1055cc | 10.5 | 1.07 | |
| 73.6 | 1069cc | 10.6 | 1.08 | |
There are three factors that determine the engine displacement: the number of cylinders, the bore diameter, and the stroke amount. By increasing or decreasing these, engines with various displacements are created.
Here, regardless of whether it is actually possible, the displacement when the piston diameter is expanded from the genuine 68.0 mm to 71.0 mm in 0.5 mm increments and when the stroke is extended from the genuine 68.6 mm to 73.6 mm in 1 mm increments.
And, the change of the compression ratio when it is assumed that the volume of the combustion chamber does not change is listed.
* It is easy to say stroke up, but if you want to make a long stroke, you need a crankshaft and a compatible connecting rod, and if you can not divert it, you have to make it in one-off, so it is expensive anyway. It is a menu that requires considerable preparedness to put out.
Regarding the compression ratio, in most cases, the uneven capacity of the top surface of the piston changes as the diameter of the piston increases, so the compression ratio values in the list do not match, but the displacement. Please enjoy the atmosphere that the compression ratio will naturally increase as you increase the size.
The B / S ratio is an abbreviation for the bore stroke ratio, and as the bore diameter is widened, the characteristics of the long stroke type, square type, or short stroke type are approached. In the case of K10A type engine, the ratio changes from 1.01 to 0.97 when the bore is increased by +3.0mm from the genuine piston.
Increased displacement with engines with similar piston diameters
There are 12 engines with pistons that are similar in size to the K10A type engine with a piston diameter of 68.0 mm, so let’s calculate the displacement when the piston is diverted and the bore is increased as a sideshow.
| Eg model | Piston diameter | Displacement |
|---|---|---|
| Toyota 1SZ type | 69.0mm [+ 1.0mm] | 1026cc [+ 30cc] |
| Toyota 1KR type | 71.0mm [+ 3.0mm] | 1086cc [+ 90cc] |
| Honda P07A type | 71.0mm [+ 3.0mm] | 1086cc [+ 90cc] |
| Nissan CG13 type | 71.0mm [+ 3.0mm] | 1086cc [+ 90cc] |
| Mitsubishi 4G13 type | 71.0mm [+ 3.0mm] | 1086cc [+ 90cc] |
| Mazda B3 type | 71.0mm [+ 3.0mm] | 1086cc [+ 90cc] |
Engines with similar piston diameters include
- Toyota: 1SZ type 997cc 69.0mm mounted on SCP10 type Vitz,
- Toyota: 1KR type 996cc 71.0mm mounted on M900F type boon,
- Honda: P07A mounted on JB5 type life. 71.0mm of type 658cc,
- Nissan: 71.0mm of CG13 type 1274cc mounted on Z10 type cube,
- Mitsubishi: 71.0mm of 4G13 type 1298cc mounted on CJ1A type Mirage,
- Mazda: B3 type 1323cc mounted on DW3W type Familia 71.0mm etc. is applicable.
(Although the number of people who find pleasure in such a quest has decreased) No matter how close the diameter is, there are factors such as the diameter of the piston pin, the height of the piston, and the convenience of valve recess.
So if possible, the same manufacturer, If possible, if you choose the same fuel and the same intake method, and if possible, the one with a similar displacement, the possibility of genuine diversion may increase.
Average piston speed
|
Next, let’s look at the average piston speed. The average piston speed at 7000 rpm, where an engine with a stroke of 68.6 mm produces maximum output, is 16.0 m / s , which is a piston speed that travels a distance of 16.0 meters per second (57.6 km / h at speed). It means that is moving up and down.
The average speed is 17.3 m / s at 4500 rpm, which generates the maximum torque, and 17.1 m / s when the rev limit is assumed to be 7500 rpm, which is 500 rpm higher than the 7000 rpm where the maximum output is generated.
For reference, I calculated the change in piston speed when a K10A engine with a stroke of 68.6 mm is rotated up to 10000 rpm. Looking at this, it seems that the speed increases by approximately 4.57 m / s as the number of revolutions increases by 2000 revolutions.
Considering only 20.0 m / s, which is a guideline for a general engine assuming mass production, it is mechanical to set the upper limit of high rpm to about 8750 rpm (whether it rotates or not). It seems to be preferred both mentally.
Suzuki K10A turbo engine specifications and performance summary [In-line 4-cylinder 996cc]
Here, we will investigate the characteristics and characteristics of this engine by referring to the data of the K10A type turbo engine installed in Suzuki’s MA63S type Wagon R Plus [XT ｜ 1999/05 model].
| K10A Turbo Engine Specifications | |
| Vehicle model | GF-MA63S type |
|---|---|
| Car name & grade | Wagon R Plus XT |
| Engine model | K10A |
| type | In-line 4-cylinder |
| Displacement | 996cc |
| Inner diameter x stroke | 68.0mm×68.6mm |
| Bore stroke ratio | 1.01 |
| Single cylinder volume | 249.1cc |
| Compression ratio | 8.4 |
| Intake method | turbo |
| use fuel | Regular gasoline |
| Maximum output | 100PS/6500rpm |
| Maximum torque | 12.4kgm/3000rpm |
First of all, as a basic structure, the K10A engine is a long stroke engine with a bore (inner diameter) of 68.0 mm, a stroke (stroke) of 68.6 mm, and a bore stroke ratio of 1.01 (the stroke amount is larger than the piston diameter).
Strictly speaking, if the displacement and the number of cylinders are the same, it is not allowed to call yourself a square type unless the bore and stroke are exactly the same, but if the bore stroke ratio is so close to 1, “Already It’s okay to make it a square type! ”
These engines retain the flavor of short stroke type or long stroke type, but in fact, they have characteristics that are as close as possible to square type.
Among the car models registered on this site, the oldest car model equipped with the K10A type turbo engine is the first Wagon R wide [MB61S type | 1998/05] released from 1997/02 , and the newest car model is 1999. It is the 2nd generation Wagon R Plus [MA63S type | 1999/05] released from / 05 , and 6 types of turbo / SC cars are registered.
Evaluation from the viewpoint of transient characteristics and liter equivalent horsepower
| Image of engine performance curve | |
|---|---|
| |
| Changes in horsepower | 51.9PS → 100PS |
| Transition of torque | 12.4kgm → 11.0kgm |
| Liter horsepower | 100.40PS/L |
| Litter torque | 12.4kgm/L |
Displacement increase, compression ratio increase, bore stroke ratio change
| Normal displacement and compression ratio | ||||
|---|---|---|---|---|
| Bore | Stroke | Displacement | Compression ratio | B/S ratio |
| 68.0 | 68.6 | 996cc | 8.4 | 1.01 |
| Displacement expansion by bore up | ||||
| 68.5 | 68.6 | 1011cc | 8.5 | 1.00 |
| 69.0 | 1026cc | 8.6 | 0.99 | |
| 69.5 | 1041cc | 8.7 | 0.99 | |
| 70.0 | 1056cc | 8.8 | 0.98 | |
| 70.5 | 1071cc | 9.0 | 0.97 | |
| 71.0 | 1086cc | 9.1 | 0.97 | |
| Displacement expansion by increasing stroke | ||||
| 68.0 | 69.6 | 1011cc | 8.5 | 1.02 |
| 70.6 | 1026cc | 8.6 | 1.04 | |
| 71.6 | 1040cc | 8.7 | 1.05 | |
| 72.6 | 1055cc | 8.8 | 1.07 | |
| 73.6 | 1069cc | 8.9 | 1.08 | |
There are three factors that determine the engine displacement: the number of cylinders, the bore diameter, and the stroke amount. By increasing or decreasing these, engines with various displacements are created.
Here, regardless of whether it is actually possible, the displacement when the piston diameter is expanded from the genuine 68.0 mm to 71.0 mm in 0.5 mm increments and when the stroke is extended from the genuine 68.6 mm to 73.6 mm in 1 mm increments.
And, the change of the compression ratio when it is assumed that the volume of the combustion chamber does not change is listed.
* It is easy to say stroke up, but if you want to make a long stroke, you need a crankshaft and a compatible connecting rod, and if you can not divert it, you have to make it in one-off, so it is expensive anyway. It is a menu that requires considerable preparedness to put out.
Regarding the compression ratio, in most cases, the uneven capacity of the top surface of the piston changes as the diameter of the piston increases, so the compression ratio values in the list do not match, but the displacement. Please enjoy the atmosphere that the compression ratio will naturally increase as you increase the size.
The B / S ratio is an abbreviation for the bore stroke ratio, and as the bore diameter is widened, the characteristics of the long stroke type, square type, or short stroke type are approached. In the case of K10A type engine, the ratio changes from 1.01 to 0.97 when the bore is increased by +3.0mm from the genuine piston.
Increased displacement with engines with similar piston diameters
There are two engines with pistons that are similar in size to the K10A type engine with a piston diameter of 68.0 mm, so as a side note, let’s calculate the displacement when the piston is diverted and the bore is increased.
| Eg type | Piston diameter | Displacement |
|---|---|---|
| Toyota 1KR type | 71.0mm [+3.0mm] | 1086cc [+90cc] |
| Honda P07A type | 71.0mm [+3.0mm] | 1086cc [+90cc] |
Engines with similar piston diameters include Toyota: 1KR type 996cc 71.0mm mounted on M900F Rocky, Honda: P07A type 658cc 71.0mm mounted on JB5 Life.
(Although the number of people who find pleasure in such a quest has decreased) No matter how close the diameter is, there are factors such as the diameter of the piston pin, the height of the piston, and the convenience of valve recess.
So if possible, the same manufacturer, If possible, if you choose the same fuel and the same intake method, and if possible, the one with a similar displacement, the possibility of genuine diversion may increase.
Average piston speed
|
Next, let’s look at the average piston speed. The average piston speed at 6500 rpm, where an engine with a stroke of 68.6 mm produces maximum output, is 14.9 m / s , which is a piston traveling a distance of 14.9 meters per second (53.6 km / h at speed). Means that is moving up and down.
The average speed is 16.0 m / s when the rev limit is assumed to be 6.9 m / s at 3000 rpm where the maximum torque is generated, and 7000 rpm which is 500 rpm higher than 6500 rpm where the maximum output is generated.
For reference, I calculated the change in piston speed when a K10A engine with a stroke of 68.6 mm is rotated up to 10000 rpm.
Looking at this, it seems that the speed increases by approximately 4.57 m / s as the number of revolutions increases by 2000 revolutions.
Considering only 20.0 m / s, which is a guideline for a general engine assuming mass production, it is mechanical to set the upper limit of high rpm to about 8750 rpm (whether it rotates or not). It seems to be preferred both mentally.
