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Old 4th July 2011, 19:23   #16
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Default Re: Modifying a Honda Jazz

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Originally Posted by adimicra View Post
Step 2- Tuned exhaust. I am not sure about free flows, they give lots of sound which does not necessarily translate into more power
Not sure of your other queries but the tuned exhaust can be made to sound exactly as per your requirements. I have one on my Spark and its a delight every time i start the car. My main requirement was to have a FFE which was not disturbing and loud. The tuners did an amazing job with it.
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Old 18th May 2012, 15:24   #17
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Default Re: Modifying a Honda Jazz

Thanks for bumping me up to this thread @ Selfdrive. I am based out of Ahmedabad and everyone unanimously suggested to take my queries to Neighborhood motors (Mr Tandon). I guess I will be doing that soon. The Jazz by itself has a wonderful silent engine, and gets you the power you need in the upper rev bands. On the flip side, the low end torque literally sucks. My priority is simple. Increase the low-end torque. I really don't need anything else. GTO mentioned a 5 - 7% increase with stage 1 mods. On the road, what does that translate to?
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Old 23rd May 2012, 23:27   #18
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Default Re: Modifying a Honda Jazz

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Originally Posted by sgiitk View Post
Quite often with Honda engines people tend to forget that they develop maximum torque pretty high up the band. So drive enthusiastically, and use the excellent gear shift!
Sorry for asking a very basic question of you. I am new to car-lingo. and googling doesn't yield anything conclusive. Wanted to ask you how is one expected to rev a new Honda engine to overcome the lack of pull at low speeds (what, I think, petrolheads here call lack of low-end torque?). So, when you say 'drive enthusiastically' and use the gear-shift, what am I supposed to be doing?

How does one rev a car? By pressing the clutch and then going after the accelerator?

I am a new driver with a brand new Honda Jazz. Our first servicing is still some time to go so should I try and 'rev' the car rightaway or wait for the run-in to end?
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Old 7th June 2012, 17:07   #19
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Default Re: Modifying a Honda Jazz

I am going in for a CAI as the first step of modification. Cant decide between an Injen CAI and Cosworth CAI. The price difference is huge. I have put up the question on my ownership thread too, but I guess I would get better answers on this one. What do you guys think I should do? Installation in both cases will be done locally in Ahmedabad.
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Old 7th June 2012, 17:17   #20
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Default Re: Modifying a Honda Jazz

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Originally Posted by esskay08 View Post
I am a new driver with a brand new Honda Jazz. Our first servicing is still some time to go so should I try and 'rev' the car rightaway or wait for the run-in to end?
look at the rpms. Try to keep them steadily high. No high revving or sudden accelerating for the first x kms. What is x? I dont remember, just check your manual or ask your service advisor.
I would stay clear of ripping the car in the first 1K kms at least

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I am going in for a CAI as the first step of modification. Cant decide between an Injen CAI and Cosworth CAI. The price difference is huge.
whats the price difference?
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Old 7th June 2012, 17:37   #21
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Quote:
Originally Posted by esskay08

How does one rev a car? By pressing the clutch and then going after the accelerator?
A new car is just isn't a new engine but a lot if complex systems to gel together. Keep the rev in limit as mentioned in your manual.

Never ride the clutch and accelerator should always be used once clutch action is complete else you will be changing the clutch more often. Normal car engines don't like to rev higher in the range but yours does so what our friend meant by revving high was to keep the torque range handsome and handy. You will have a feeling of it soon as you get acquainted with the character of the engine. Enjoy!

Quote:
Originally Posted by selfdrive
look at the rpms. Try to keep them steadily high. No high revving or sudden accelerating for the first x kms. What is x? I dont remember, just check your manual or ask your service advisor.
I would stay clear of ripping the car in the first 1K kms at least
for a new car the RPM should not be steady for a longtime. Keeping it at different range helps the engine bed in better.

Most Honda guys hooked on this thread. Pranav, GTO are experienced campaigners with Honda engines.
To what I know Jazz has 1.5L engine in other countries (the engine in City), and these engines are tuned for mileage in India. Thus nothing much can be done except a complete remap with all the Stage kits that go with it. I am hooked to see your progress.

Cheers!
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Old 7th June 2012, 18:06   #22
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Default Re: Modifying a Honda Jazz

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Originally Posted by esskay08 View Post
Sorry for asking a very basic question of you. I am new to car-lingo. and googling doesn't yield anything conclusive. Wanted to ask you how is one expected to rev a new Honda engine to overcome the lack of pull at low speeds (what, I think, petrolheads here call lack of low-end torque?). So, when you say 'drive enthusiastically' and use the gear-shift, what am I supposed to be doing?

How does one rev a car? By pressing the clutch and then going after the accelerator?

I am a new driver with a brand new Honda Jazz. Our first servicing is still some time to go so should I try and 'rev' the car rightaway or wait for the run-in to end?
You need to shift down to lower gears and that will automatically increased your revs for a given speed. So you need to change gears frequently and it should be a joy on an Honda
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Old 7th June 2012, 23:35   #23
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Default Re: Modifying a Honda Jazz

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Originally Posted by srishiva View Post
You need to shift down to lower gears and that will automatically increased your revs for a given speed. So you need to change gears frequently and it should be a joy on an Honda
Will driving at higher revs result in a lower FE? Should I be upshifting at the earliest opportunity for a higher FE?
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Old 8th June 2012, 08:29   #24
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Default Re: Modifying a Honda Jazz

Hello,
Has anyone done the remapping and modifications of their Jazz as suggested by fellow bhpians in Kochi? If so , please tell me the end result, the cost and where you got it done. Thanks.
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Old 8th June 2012, 11:11   #25
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Default Re: Modifying a Honda Jazz

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Originally Posted by qaqa View Post
Will driving at higher revs result in a lower FE? Should I be upshifting at the earliest opportunity for a higher FE?
Low rpms will yield better FE but then you need to be in the right gear so that you don't lug the engine.

Revving a smaller engine a bit doesn't consume more fuel than a bigger engine, you need to be at the rpm that is efficient for the engine.

If your car has the eco light or the right gear indicator, just follow that.
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Old 9th June 2012, 10:29   #26
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Default Re: Modifying a Honda Jazz

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Originally Posted by selfdrive View Post
look at the rpms. Try to keep them steadily high. No high revving or sudden accelerating for the first x kms. What is x? I dont remember, just check your manual or ask your service advisor.
I would stay clear of ripping the car in the first 1K kms at least
Quote:
Originally Posted by Sn1p3r View Post
...accelerator should always be used once clutch action is complete else you will be changing the clutch more often. Normal car engines don't like to rev higher in the range but yours does so what our friend meant by revving high was to keep the torque range handsome and handy. You will have a feeling of it soon as you get acquainted with the character of the engine...for a new car the RPM should not be steady for a longtime. Keeping it at different range helps the engine bed in better.
Quote:
Originally Posted by srishiva View Post
You need to shift down to lower gears and that will automatically increased your revs for a given speed. So you need to change gears frequently and it should be a joy on an Honda

Thanks to all the three of you Yes, now that I have driven the car around a few times, I am beginning to get what revving is all about. Though, it is a couple of hundred kms shy of covering a 1000km, we have inadvertently punished it a few times. With two drivers in learning mode, there have been times, even if for a few seconds, when the revs have touched the 3000 rpm mark. Hope that the iVtec does not mind as enthusiasts like you believe.

Surprisingly, the manual that came with the Jazz does not have detailed info on rev-speed matches or anything of that sort :(
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Old 9th June 2012, 13:06   #27
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Quote:
Originally Posted by esskay08

Thanks to all the three of you Yes, now that I have driven the car around a few times, I am beginning to get what revving is all about. Though, it is a couple of hundred kms shy of covering a 1000km, we have inadvertently punished it a few times. With two drivers in learning mode, there have been times, even if for a few seconds, when the revs have touched the 3000 rpm mark. Hope that the iVtec does not mind as enthusiasts like you believe.

Surprisingly, the manual that came with the Jazz does not have detailed info on rev-speed matches or anything of that sort :(
It's all about sharing, enjoy the ride. It is good that you have pushed the engine a bit. 3000 is nothing, the car will soon present you to rev it up to 6000 mark. The engine sound post vtec kicks in changes so you will know when you are in the territory.

Honda insist that engines have been tested and then plugged in the cars, no issues with revving it at various rpms. The first 1000km zone is for making sure every other component of the car is also ready.

Enjoy!
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Old 11th June 2012, 11:35   #28
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Default Re: Modifying a Honda Jazz

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Originally Posted by esskay08 View Post
Surprisingly, the manual that came with the Jazz does not have detailed info on rev-speed matches or anything of that sort :(
Though I am not sure if the Fit manual has these details, I would recommend you to search TBHP for the 'Fit manual' pdf. I do have a copy somewhere on my old laptop, but it will take me some time to locate it and put it up here. Mught be quicker for you to look it up here or elsewhere online.
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Old 12th June 2012, 10:49   #29
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Default Re: Modifying a Honda Jazz

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Originally Posted by Sn1p3r View Post
3000 is nothing, the car will soon present you to rev it up to 6000 mark. The engine sound post vtec kicks in changes so you will know when you are in the territory.Enjoy!
Quote:
Originally Posted by selfdrive View Post
I would recommend you to search TBHP for the 'Fit manual' pdf.
The older Fit manual (2006) with most probably the 1.2 litre engine, says:-

1st to 2nd - 24 km/h
2nd to 3rd - 43 km/h
3rd to 4th - 62 km/h
4th to 5th - 85 km/h

While driving to office today, I tried to keep these in mind (I didn't cross 60 kmph) and drove, and no where did the rpms cross 2k.

However, our driver, who supervises our driving for now, kept getting impatient whenever I was driving a li'l above 20 in the second gear. I even drove in the 4th gear when a li'l below 60 kmph.

Now, I know one can't be too bookish and his experience is years ahead of ours, but for Indian roads and Honda 1.2 engines what are the realistic gear-shift ratios?

Earlier, I used to get an engine sound and automatically used to think that the car was 'racing' (what the driver calls racing is probably revving that is harmful?). That would make me upshift quickly. But today when I was trying to match it according to the chart above, I found that I still got the sound without any drastic increase in rpm or speed. But yes, the driver insisted that I upshift.

Which style should I follow? Because if not changed now, this will become a habit and the way I drive...

Thanks very much
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Old 12th June 2012, 13:44   #30
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Default Re: Modifying a Honda Jazz

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Originally Posted by esskay08 View Post
Now, I know one can't be too bookish and his experience is years ahead of ours, but for Indian roads and Honda 1.2 engines what are the realistic gear-shift ratios?

Which style should I follow? Because if not changed now, this will become a habit and the way I drive...
I am sorry I cannot help much here; I am too moody a driver to rely on for speeds at gearshift.
Most of the times I am a sedate driver, so I would be matching the numbers given in the Fit manual. A majority of these too I shift a bit early, so I am in top gear around 60.

What I do ensure is optimal gear changes; it does help in mileage.

On the odd day that my doppelganger takes over me, all gearshifts are totally irrelevant to vehicle speed and done more out of the Vtec roar. Needless to say mileage goes for a toss but then mileage doesnt always bring a smile
Disclaimer: my Jazz has done 35k + kms.
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