engine capacity and horsepower

[richardtan]

Dear SiFus,

For cars with say 2.4 litres, they have, without mods, horsepower usually like 240 hp.
Likewise, a 3 litre engine can produce something like 300hp.

While turbo charged Vios can produce 145 hp, why is Vios 1.5 litres only producing 109hp without mods?


regards
Richard

 

[j_l200s]

keep this theory in mind. Nothing replaces displacement, except more displacement.

2ndly, it depends on the engine spec. vios's engine is 1NZ-FE. Notice the 'F'? F is for fuel economy. I'll show u another example. We take 4A-FE (Local spec) and 4A-GE (Japan spec). Both are 1.6 litres. 4A-FE churns out 113HP (according to WIKI) while the 4A-GE (assuming the 20V Blacktop) churns out 165 HP (on paper).

another theory is, usually bigger CC engines are meant for bigger/heavier cars and vice-versa so that it won't upset the power to weight ratio for that particular car. How come a kancil with a standard daihatsu L200 660cc turbo has just 64ps (63hp)?

above 3 is only from my knowledge la... hopefully it answered your question. if not, other sifus kindly correct me or top up more info... :)

 

[didie]

Sorry but what is exactly ur question? Because as far as im concern, the example u use aren't comparable. Ur comparing a 1.5 N/A and a charged 1.5, and with different displacements? Ofcoz theres different in the power output as the turbo-charged are forced induction. :D

 

[Dayline668]

TS was asking y a vios 1.5 not producing 150hp haha... funny question.. A engine is design for a car, not the other way around. j_l200s was right. Take the 4age 1.6 hav a range of 140 to 165hp.

 

[didie]

TS was asking y a vios 1.5 not producing 150hp haha... funny question.. A engine is design for a car, not the other way around. j_l200s was right. Take the 4age 1.6 hav a range of 140 to 165hp.

Ohh isee. Thanks for the enlightment. Was abit confuse with the question. :p

 

[lkeong88]

2.4 camry dont produce 240hp even with mods

 

[xMika]

camry 2.4 litre around 158hp only ..

 

[meg_omen]

find or use a 'G' spec engine instead of 'F'...
another example is celica/mrs engine...
you can notice it by this - VVTi & VVTLi...:hmmmm:

 

[richardtan]

Thanks dear SiFus,

I now know the diff between FE and ZE and engine code meaning.

Yup, my question was a bit strange. I just wanted to know more about displacement and horsepower. While 2.4 l Camry does not produce 240 hp, what i meant was there are many engines where from the displacement, can tell the hp it can produce. Of course, loosely speaking. There is a pattern.

So, does it mean that the FE engine can have 150 hp if the controlling or limiting by the ECU is removed? So, technically speaking, can I say that the Displacement does correlate to the hp eg. 1.5 litres can get 150 hp. 2.4 litre can get 240 hp assuming the unladen weight is the same . Its just that the power will be lower when the engine is controlled for Fuel Economy eg. FE model?

Nice day yall.

regards
Richard

 

[^pomen_GTR^]

well...thats depend on the manufacturer to design and built the engine according to the need....

like for street use and carry heavy load they put more focus on torque delivery instead of maximum power....while for racing/sports car where they need more HP..then u got high powered engine....

well....now honda i think still holding record for highest hp/liter engine for production car...
Honda S2000 F20c engine with 250hp translate to 125hp/liter....

ferrari i think around 115hp-120hp/liter


both was normally aspirated engine....for turbo engine i not sure who was holding the top status...

 

[YYC]

find or use a 'G' spec engine instead of 'F'...
another example is celica/mrs engine...
you can notice it by this - VVTi & VVTLi...:hmmmm:

F=Fuel economy
G=....?

 

[tonyops]

F=Fuel economy
G=....?

G= Gila Power!!

 

[j_l200s]

F = Economy oriented setup.
G = performance oriented setup.

Most of the G family heads are developed by Yamaha.

 

[Dayline668]

G= Gila Power!!

Haha... nice 1.....

 

[Veloc]

Dear SiFus,

For cars with say 2.4 litres, they have, without mods, horsepower usually like 240 hp.
Likewise, a 3 litre engine can produce something like 300hp.

While turbo charged Vios can produce 145 hp, why is Vios 1.5 litres only producing 109hp without mods?


regards
Richard

I think I know what are you referring to. No, a car that has 2.4 L does not necessarily produces 240 hp. The power and engine capacity is not directly proportionate. The power from an engine depends on a lot of factors i.e the engine design, the tunning/mapping, the materials used.

That is why for a 2.4 L engine, some produce 150 hp, some 160, some 170 hp. That is the standard. We refer to this as "specific output" and it is expressed in power per litre. A normal modern NA engine in a passenger will normally produce around 65 - 80 hp per litre.

Race bred NA engines will have 95 - 125 hp per litre.

Forced induction engines might have 95 - 200 hp per litre.

For the camry 2.4 L you've mention, it produces lower specific output than normal 2.4 L because it runs on atkinson cycle. You can google about that. It gives better fuel economy by sacrificing a little power.

for vios, 1.5 L producing 109 hp, I would say it is healthy for a modern valve-timing engine. It means it has 72.6 hp/litre.

Turbocharged engines will almost always have higher specific output than NA engines because it increases the "effective displacement" of the engine. For example, a vios turbo might have a displacement of 1.5 L. But because of the turbo, its "effective displacement" might actually be 1.8 L (just roughly).

 

[hachiroku clan]

its not cheap to maintain a '100HP per litre' engine as the parts are stressed more than an economically oriented engine, not to mention the fuel consumption..

an easy example, the standard campro, it produces:
110HP, CPS 125HP, and the neo R3 at 145HP..
its not the case of 'how much power can it make' but 'how much power the manufacturers want it to make'..


cost, reliability and efficiency comes to mind..
oh and also the target consumers..

 

[redsider]

G= Gila Power!!

G = GARANG!!!!

 

[D7zul]

4A-G Engine Codes

Every Toyota “engine type” has a code consisting of numbers and letters. An “engine type” may actually be a family of engines spanning several design generations and encompassing different specifications or components.



The first character is always a number followed by one or two letters. The number indicates the generation. The letter(s) indicates the engine family.



Following the engine generation and family codes, there are different combinations of additional letters, each of which represent a specific engine characteristic:



C - Equipped with emissions control systems (note: The “C” is not used if the engine was originally equipped for emissions controls.)(The C notation has been associated with California’s (USA), at that time having stricter emission standards)

U - Equipped with emissions control systems for Japan. (The U notation has been associated with the introduction of Unleaded fuel available in Japan at that time)

E - Electronic fuel injection (EFI)

F - Gear coupled cam drive; dual overhead cam (DOHC) engine: timing belt or chain drives one cam, and “scissors” gear drives the other cam. [Narrow included valve angle]. The split “scissors” gear is a unique way to eliminate gear backlash.

G - Dual overhead cam (DOHC) engine: timing belt or chain drives both cams. [Wide included valve angel]

L - Transversely mounted in vehicle

T - Turbocharged

Z - Supercharged





Examples:



4A - SOHC, 8 valves

4A-C - SOHC, 8-valves, equipped with emissions control system

4A-LC - SOHC, 8-valve, transversely mounted, equipped with emissions control system

4A-GE - DOHC, 16-valve, fuel injected

4A-GEC - DOHC, 16-valve, fuel injected, equipped with emissions control system

4A-GELC - DOHC, 16-valve, fuel injected, transversely mounted, equipped with emissions control system

4A-F - DOHC, 16-valve, gear coupled cam drive, carbureted

4A-FE - DOHC, 16-valve, gear coupled cam drive, fuel injected

4A-ELU - DOHC, 16-valve, gear coupled cam drive, fuel injected, transversely mounted, equipped with emissions control system for Japan.

4A-GZE - DOHC, 16-valve, supercharged and fuel injected

 

[GasPedal]

Engine power greatly rely on torque and engine revolution speed [rpm]. Other factor is camshaft profile and engine head design.
Wiki stated formula…………Power = Torque X Rpm.
There are two ways to increase engine power,

First is to rev higher [4AGE, B16A, B18C]
For simplicity we compare economy engine 4AFE ~110hp (local corolla seg) and performance engine 4AGE ~ 160hp (japan corolla levin/trueno).
Both have same capacity, 1600cc, with almost equal torque.
But why 4AGE have higher power rating?
The answer is 4AGE rev higher than 4AFE. (4AGE redline 8000rpm, 4AFE redline 6400rpm).
Same apply to formula one 2.4L engine, it torque is only 270nm, lancer evo 2.0turbo 380nm is much higher, but why F1 have ~700hp?...........coz it rev to 18000rpm!!!

Other way is to increase torque output = bigger engine cc, turbo, supercharger (4G63, 4G93turbo, 4AGZE)

All come back to formula…………….Power = Torque X Rpm

Hopes this will explain something…..

 

[^pomen_GTR^]

yeah...just look at how much formula one 2.4liter v8 engine making power almost 1000hp at rpm reaching 20 000rev