[Ownership Thread]: Pulsar 220 DTS-Fi - Page 53 - xBhp.com : The Global Indian Biking Community

need4torque · 11-12-2008, 03:14 PM

Quote:

Originally Posted by pranay

Some interesting info if u want to know about the parabolic and ellipsoidal lamps in 220.

Headlight systems descriptions

What are the names of the 3 different headlight types?

Parabolic: The light source hits a parabolic reflector that will determine the main focus of the beam. Then the front glass will dispurse the ligth more to each side. Ie. Mercedes up until model year 2000.
Free form: Same as parabolic, but front lens is clear. Ie. Volvo V70 below:

Ellipsoidal: Light source hits a parabolic reflector, gets horizontally cut off in the first focal point, then projected back straight again with a curved lens. Ellipsoidals is also known as projector headlights.

What is the difference between a projector and a reflector design?
Efficiency:

Parabolic: 27%
1st Generation Ellipsoidal (found on early 90s BMW): 36%
Free form: 45%
2nd Generation Ellipsoidal (found on late 96+ Audi, late model BMW): 52%

There has been a trend that more and more wehicles go away from the traditional parabolic headlamp. The thick glass that are needed makes it a loser in the game of efficient lighting. It seems like the majority of auto manufacturers select ellipsoidals, but they weren't up to par in the first generation. The lower 180 degrees of the bulb output were practically not getting out of the housing. The second generation is designed with another focal point to increase efficiency.
Beam Cutoff:
Projectors create a much sharper cutoff than reflectors. Although some parabolic reflectors can create pretty decent cutoffs, a projector will always be better. The main advantage of projectors is the fact that they can be aimed higher than reflectors because no stray light (above the cutoff) will exist to cause glare to oncoming drivers. This is especially important with high intensity light sources like HID and the new HIR halogen bulbs.
Universality:
Projectors can be designed to be easily switchable from left drive to right drive beam patterns without loss of light. This usually done by turning the reflector housing in reference to the shield and you get the full 'opposite' beam pattern. UK needs this ability to drive legally on the continental Europe. This is why some cars for the UK market have projectors where the rest of the world do not. With a parabolic reflector, the 'kick up' part of the lens has to be taped up (so you lose the kick up completely).
Versitality:
Projectors are normally not used in combined high/low beam setups, although it iss possible to have a moveable shield and this is just what happens with "bi-xenon projector" setups, but this would be very costly in a economy car with halogen setup. A regular H4 or 9007 application is much more cost effective.
Source: www.hidforum.com

also a wikipedia website:

Headlamp - Wikipedia, the free encyclopedia

Pranay, Thats a very informative post. It would be even better with diagrams explaining the working. I plan to check out the source to see if they have any.

nitrosatya · 11-12-2008, 05:39 PM

The motul 300v has worked wonders! The change is noticeable only when u rip her hard! Now my bike redlines so easily on 2nd and 3rd gear! Also balancer shaft overloading has smoothed her a lot!

pranay · 11-12-2008, 06:16 PM

Quote:

Originally Posted by need4torque

Pranay, Thats a very informative post. It would be even better with diagrams explaining the working. I plan to check out the source to see if they have any.

Thanks, bro and about the working diagrams. If you check out the Wikipedia link I have posted, it has a proper diagrammatic explanation. Anyways, here is the link again:

http://en.wikipedia.org/wiki/Headlam...oidal.29_lamps

PS:-Just Checked in Osram India Bangalore office. The NightBreaker is not available yet.

jigar · 11-12-2008, 09:20 PM

hey guys... my bikes chain had come pretty lose.. the gears were making a loud thud noise and i cud feel drop in power owing to it.. there was a lot of play in it! So, today i got it tightened at my local mechanic, and now its very tight. Doesnt move from its place (up & down) at all. Is such a tight setting ok or shud i ask him to loosen up a bit? Does a tight chain cause problems? Also, after this, chain emits another "zrrrrrrr" sound too which was not there before.. so is something wrong? Pls help me!

And what shud be the ideal tightnes of the chain.. how freely shud it move up & down?

Aryan · 11-12-2008, 09:27 PM

@jigar: As far as I know, too much slackness is bad no doubt, but too much tightening is also bad! It should be just right..

Praful · 11-12-2008, 09:28 PM

Quote:

Originally Posted by jigar

hey guys... my bikes chain had come pretty lose.. the gears were making a loud thud noise and i cud feel drop in power owing to it.. there was a lot of play in it! So, today i got it tightened at my local mechanic, and now its very tight. Doesnt move from its place (up & down) at all. Is such a tight setting ok or shud i ask him to loosen up a bit? Does a tight chain cause problems? Also, after this, chain emits another "zrrrrrrr" sound too which was not there before.. so is something wrong? Pls help me!

And what shud be the ideal tightnes of the chain.. how freely shud it move up & down?

Don't remember off hand, but AFAIK the manual has the optimum slackness listed somewhere in it!

jigar · 11-12-2008, 11:53 PM

Quote:

Originally Posted by Aryan

@jigar: As far as I know, too much slackness is bad no doubt, but too much tightening is also bad! It should be just right..

its also causing tiny vibrations on to lefthand side footrest... feels as if the chain is rubbing against something.... hence the sound & vibes.. its very tight as i can tell you.

chilled_fire · 11-13-2008, 10:33 AM

Quote:

Originally Posted by nitrosatya

The motul 300v has worked wonders! The change is noticeable only when u rip her hard! Now my bike redlines so easily on 2nd and 3rd gear! Also balancer shaft overloading has smoothed her a lot!

well in my case it doesnt rev tat easily on lower gears but on higher gears it does but here also thers a range of 6 to 6.3 whr the engine gets harsh but after tat all smooth.
Donno y ?

@Jigar : bro, u need to do such changes in PBK SC only, slightest here n thr in chain adjustments and whole lota vibrations for sure, but dont worry its not a big deal just get it rectified at SC.

nitrosatya · 11-13-2008, 12:30 PM

Quote:

Originally Posted by jigar

its also causing tiny vibrations on to lefthand side footrest... feels as if the chain is rubbing against something.... hence the sound & vibes.. its very tight as i can tell you.

I experienced this after the first service!

I had even posted a pic.
Now do one thing,lubricate the chain with SAE 90 rated oil.And make sure the chain is smeared in oil. I don't use any spray. And if that doesn't work tell me. I will post another method that i came up with.

Aryan · 11-13-2008, 12:31 PM

Quote:

Originally Posted by nitrosatya

I experienced this after the first service!

I had even posted a pic.
Now do one thing,lubricate the chain with SAE 90 rated oil.And make sure the chain is smeared in oil. I don't use any spray. And if that doesn't work tell me. I will post another method that i came up with.

Could you please suggest any 90-grade oil for the drive chain? I am contemplating on getting one, but not sure which one to get..

Any particular SAE 90 grade oil brand or something that you use/ or would recommend for the chain?

11-12-2008, 09:20 PM	#524 (permalink)
jigar Fuel Injected Join Date: Sep 2008 Location: Vasai, Mumbai Posts: 19	hey guys... my bikes chain had come pretty lose.. the gears were making a loud thud noise and i cud feel drop in power owing to it.. there was a lot of play in it! So, today i got it tightened at my local mechanic, and now its very tight. Doesnt move from its place (up & down) at all. Is such a tight setting ok or shud i ask him to loosen up a bit? Does a tight chain cause problems? Also, after this, chain emits another "zrrrrrrr" sound too which was not there before.. so is something wrong? Pls help me! And what shud be the ideal tightnes of the chain.. how freely shud it move up & down? __________________ Glad that xBHP is back... and glad to be back on xBHP!!! :D

11-12-2008, 09:27 PM	#525 (permalink)
Aryan Senior Member Join Date: Jan 2006 Location: New Delhi/ Shillong Posts: 18,274	@jigar: As far as I know, too much slackness is bad no doubt, but too much tightening is also bad! It should be just right.. __________________ ...in search of that perfect world - My Travel Blog :)

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11-12-2008, 05:39 PM	#522 (permalink)
nitrosatya Senior Member Join Date: Sep 2006 Location: Beijing,China Posts: 1,540	The motul 300v has worked wonders! The change is noticeable only when u rip her hard! Now my bike redlines so easily on 2nd and 3rd gear! Also balancer shaft overloading has smoothed her a lot!

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