Modded car for daily or weekend?

[6UE5t]

The vandalizing thing is indeed a bad thing especially widely circulated on social media. The more people share this kind of things out, the higher the chances of people who tries to follow, thinking that so many people had done it.

Yeah, sidetracked too far from topic.
...:

But seriously I think people need to see that and learn, so they don't park like d*kheads!

 

[vr2turbo]

When oldie mechanic retires, it will be a hard time to maintain these carbs anymore. But I guess it depends on location as well. In Ipoh, I think there are more carb cars going around than KL. So, knowing how to fix carb in Ipoh is probably like a requirement to be a mechanic.

Looking at these twin weber setups, I really wonder are they that effective until it makes ordinary engines looking like performance engines. I've seen before at YouTube, old Datsun 120Y B310 engine modded with twin carb. I think the 120Y engine probably makes less hp than 4G13 in stock form but it sounded and responded like race engine with twin carb.

My Weber was twin choke. Single down draft using adapter. If side draft change to short inlet manifold with twin carb then sure more power.....lol

 

[RENESIS VIII]

But seriously I think people need to see that and learn, so they don't park like d*kheads!

So, it works two ways I guess. Either it tells people that they should park properly or it influences people to resort to vandalism against others.

My Weber was twin choke. Single down draft using adapter. If side draft change to short inlet manifold with twin carb then sure more power.....lol

Interesting. Just by playing around with air intake can improve that much power.

 

[vr2turbo]

Interesting. Just by playing around with air intake can improve that much power.

Not only air, fuel feed. Single weber twin choke is like normal twin carb. Side draft short inlet means the air fuel goes into combustion camber faster, so response is fast. Twin carb with twin choke like 4 carbs....lol

 

[RENESIS VIII]

Not only air, fuel feed. Single weber twin choke is like normal twin carb. Side draft short inlet means the air fuel goes into combustion camber faster, so response is fast. Twin carb with twin choke like 4 carbs....lol

I din't understand much how does twin choke improves power. From what I have read, choke is there to restrict air flow and reduce pressure in the throat which causes more fuel to be pushed into the engine during cold start. Does choke actually affects the amount of fuel entering the engine? Like fuel injectors in EFI?

As for side draft carburetor, they look like those ITB system found in 4A-GE 20 Valve where the throttle is facing the side? While standard carburetor have their throttle on top?

 

[vr2turbo]

I din't understand much how does twin choke improves power. From what I have read, choke is there to restrict air flow and reduce pressure in the throat which causes more fuel to be pushed into the engine during cold start. Does choke actually affects the amount of fuel entering the engine? Like fuel injectors in EFI?

As for side draft carburetor, they look like those ITB system found in 4A-GE 20 Valve where the throttle is facing the side? While standard carburetor have their throttle on top?

In normal everyday carb, yes the choke is meant as you mentioned. But in Weber they also call choke. To what I know in normal carb the butterfly opens one side and then halfway through the second butterfly opens for more fuel for high speed. In the weber both butterfly opens at the same time, whether low speed or high speed.....lol

 

[RENESIS VIII]

In normal everyday carb, yes the choke is meant as you mentioned. But in Weber they also call choke. To what I know in normal carb the butterfly opens one side and then halfway through the second butterfly opens for more fuel for high speed. In the weber both butterfly opens at the same time, whether low speed or high speed.....lol

In a way, the one in weber allows even more airflow into the engine since both butterfly opens at the same time? Which also means it will drink fuel like crazy.

It looks something like this isn't it?

http://www.mechnol.com/wp-content/uploads/2015/02/carburetor.jpg

 

[vr2turbo]

Hello friend, you want power and then talk about FC......lol

Power comes from displacement, if not, more air/fuel.....

 

[RENESIS VIII]

Hello friend, you want power and then talk about FC......lol

Power comes from displacement, if not, more air/fuel.....

Hahaha, in older tech engines, hard to get high power without influencing FC badly. Unlike some new engines where the FC figures can sound hard to believe due considering the power they produce.

Well high displacement doesn't really equates to high power though most of the time it is. Engines like B16B and B18CR can produce more power than the 2 litre standard K20 engine from Civic FD.

 

[vr2turbo]

Hahaha, in older tech engines, hard to get high power without influencing FC badly. Unlike some new engines where the FC figures can sound hard to believe due considering the power they produce.

Well high displacement doesn't really equates to high power though most of the time it is. Engines like B16B and B18CR can produce more power than the 2 litre standard K20 engine from Civic FD.

Of course there are more to it then just displacement, valves, exhaust flow, etc. etc.....but main thing is still displacement. If you mod a larger CC car is easier to get more power.....lol

 

[6UE5t]

Hahaha, in older tech engines, hard to get high power without influencing FC badly. Unlike some new engines where the FC figures can sound hard to believe due considering the power they produce.

Well high displacement doesn't really equates to high power though most of the time it is. Engines like B16B and B18CR can produce more power than the 2 litre standard K20 engine from Civic FD.

To be more exact, more MAX power at high revs but not necessarily at low-mid range revs (torque). Those Honda R type engines and the S2000 achieve such high max power as they can rev very high but down below they don't produce as much torque, that's why the cars also need to be lighter to be able to go fast. Put those engines in heavier chassis then they will be sluggish despite their high max power.

Big displacement engines (and forced induction) on the other hand can produce big power down on the rev range, that's the main difference that small engines can never achieve/replicate. Forced induction in a way is also like a substitute of displacement as it enables the engine to suck more air so that's why nowadays it can produce good torque in the low-mid range as well.

 

[RENESIS VIII]

Of course there are more to it then just displacement, valves, exhaust flow, etc. etc.....but main thing is still displacement. If you mod a larger CC car is easier to get more power.....lol

True but it depends on the overall design of the engine itself. Some engines are said to be lazy in nature. I've read before VQ35DE from 350Z is said to be lazy due to its high torque and non high revving nature.

But at the end, larger cc = more air fuel to burn in combustion chamber. Less effort and stress to the engine compared to a smaller cc engine provided that both are making the same output.

To be more exact, more MAX power at high revs but not necessarily at low-mid range revs (torque). Those Honda R type engines and the S2000 achieve such high max power as they can rev very high but down below they don't produce as much torque, that's why the cars also need to be lighter to be able to go fast. Put those engines in heavier chassis then they will be sluggish despite their high max power.

Big displacement engines (and forced induction) on the other hand can produce big power down on the rev range, that's the main difference that small engines can never achieve/replicate. Forced induction in a way is also like a substitute of displacement as it enables the engine to suck more air so that's why nowadays it can produce good torque in the low-mid range as well.

If I am not mistaken, to achieve higher revs, the pistons needs to be smaller so that it is easier to rev higher right? Hence that is why those old 1.6 litre 4 cylinder high revving engines like 4A-GE, B16A, 4G92 MIVEC have high revving nature. Which also means, high cc engines like those in F430, Murcielago needs to divide their displacement across more pistons. 4.3 litre V8 and 6.5 litre V12. If they are stuck with 4 or 6 cylinders, I don't think they can achieve such high revs?

 

[6UE5t]

True but it depends on the overall design of the engine itself. Some engines are said to be lazy in nature. I've read before VQ35DE from 350Z is said to be lazy due to its high torque and non high revving nature.

But at the end, larger cc = more air fuel to burn in combustion chamber. Less effort and stress to the engine compared to a smaller cc engine provided that both are making the same output.



If I am not mistaken, to achieve higher revs, the pistons needs to be smaller so that it is easier to rev higher right? Hence that is why those old 1.6 litre 4 cylinder high revving engines like 4A-GE, B16A, 4G92 MIVEC have high revving nature. Which also means, high cc engines like those in F430, Murcielago needs to divide their displacement across more pistons. 4.3 litre V8 and 6.5 litre V12. If they are stuck with 4 or 6 cylinders, I don't think they can achieve such high revs?

Yes of course, the smaller the pistons, the easier to rev higher. If too big pistons then will be like truck engines but got huge torque in the low rpm. The dimensions of the cylinder also plays a part, the more squarish (over square) design (bigger bore & less stroke) the easier to rev.

 

[RENESIS VIII]

Yes of course, the smaller the pistons, the easier to rev higher. If too big pistons then will be like truck engines but got huge torque in the low rpm. The dimensions of the cylinder also plays a part, the more squarish (over square) design (bigger bore & less stroke) the easier to rev.

Which means the piston will look 'fat' in a way? Larger surface area, shorter travelling distance from bottom to top.

 

[vr2turbo]

If I am not mistaken, to achieve higher revs, the pistons needs to be smaller so that it is easier to rev higher right? Hence that is why those old 1.6 litre 4 cylinder high revving engines like 4A-GE, B16A, 4G92 MIVEC have high revving nature. Which also means, high cc engines like those in F430, Murcielago needs to divide their displacement across more pistons. 4.3 litre V8 and 6.5 litre V12. If they are stuck with 4 or 6 cylinders, I don't think they can achieve such high revs?

Big piston with short stroke can high rev also. Depends whether design for torque or power.....

 

[RENESIS VIII]

Big piston with short stroke can high rev also. Depends whether design for torque or power.....

Something that I don't understand about torque vs power relation.

If lets say a car with higher torque but lower hp vs a car with higher hp but lower torque in an acceleration test, which one should be faster? The one with higher hp or torque?

Like people said old VTEC engines like B16A have low torque. So, does it mean that it is actually slower than the new i-VTEC K20 engine despite B16A having higher hp?

 

[vr2turbo]

Something that I don't understand about torque vs power relation.

If lets say a car with higher torque but lower hp vs a car with higher hp but lower torque in an acceleration test, which one should be faster? The one with higher hp or torque?

Like people said old VTEC engines like B16A have low torque. So, does it mean that it is actually slower than the new i-VTEC K20 engine despite B16A having higher hp?

Read more on torque and power loh! Here some layman answers.....
https://www.quora.com/What-is-the-meaning-of-torque-and-power-in-a-car-in-layman-terms

 

[sweelt]

Both my Nissan sentra 1988 and wira 93t for daily drive.


One my fren drop 1jz into old BMW (duno what series).
He complain 1st gear cannot control.
Too much bhp also susah in malaysia road...

 

[RENESIS VIII]

Both my Nissan sentra 1988 and wira 93t for daily drive.


One my fren drop 1jz into old BMW (duno what series).
He complain 1st gear cannot control.
Too much bhp also susah in malaysia road...

Won't your Wira use a lot of fuel? My 4G15 is already doing quite bad compared to newer cars.

I have a friend who bought a 318i E36. He plans to swap 2JZ-GTE and want to push it to 700hp... I told him better dont be too ambitious. Hard to control with that kind of power.

 

[sweelt]

Bro, thats why I still drive sentra.
Public holiday or night shift is my wira day.
Weekdays jammm....oh, my clutch too...lol
Comsumption still manageble.