Fuel problem for SBKS - xBhp.com : The Global Indian Biking Community

sudipta_roy · 08-10-2010, 11:13 AM

It's been all most 5 months that we are not getting 97 octane fuel for our Super bikes,so as of now we are forced to use IOC extra premium fuel. I have talked with the higher officials of BP but they also don't have any idea if speed 97 will be available in the near future so theirs no 2nd choice and it's tough to run bikes with octane booster every time,So the problems we are facing now is.

1)Lots of knocking in the lower rpms and in the time of sudden acceleration.

2)Some time starting problems.

what you think friends,will these cause any major problem to the engine in the long run? what would be the effect on the injectors and in the throttle bodies? Is there any solution ?

I know in lower compression bikes this won't be a problem even for GSX1300R my friend is not facing any such problem but owners like us who have R1 or 1000RR are facing lots of problem.

sunilg · 08-10-2010, 01:40 PM

Topic approved.

atul_chang · 08-10-2010, 02:57 PM

Quote:

Originally Posted by sudipta_roy

I have talked with the higher officials of BP but they also don't have any idea if speed 97 will be available in the near future

Speak to Shravakumar of BPCL - 09987148001. He has been able to help me in the past in Mumbai.

I have gone down to putting normal petrol - Power / Speed 91, but I have not faced any issues. but then I dont have a sports bike, mine is just a cruiser.

n_aditya · 08-10-2010, 03:08 PM

Quote:

Originally Posted by sudipta_roy

1)Lots of knocking in the lower rpms and in the time of sudden acceleration.

2)Some time starting problems.

what you think friends,will these cause any major problem to the engine in the long run? what would be the effect on the injectors and in the throttle bodies? Is there any solution ?

Knocking is bad for the engine. Do not ride in this condition for long or you'll have blown valves, gaskets, head, etc.

TenHut · 08-10-2010, 03:26 PM

Quote:

Originally Posted by sudipta_roy

I know in lower compression bikes this won't be a problem even for GSX1300R my friend is not facing any such problem but owners like us who have R1 or 1000RR are facing lots of problem.

1000RR or 600RR face no problem. Infact octane 97 is a waste on these bikes.
I have never faced any knocking whatsoever with shell super. Recommended octane level is 91 not 97.
Gixxer(not busa) and R1 do face this problem yeah. But it aint gonna damage the bikes in any way...u just end up gettng reduced performance !
R1 compression ratio = 12.7 : 1 very high -> will need higher octane
Gixxer compression ratio = 12.8 : 1 very high -> will need higher octane
Fireblade compression ratio = 12.3 :1 not high -> speed, power, extra premium, shell super..

fireblah · 08-10-2010, 03:47 PM

The sticker on tank says minimum 95 octane. I wish shell was available in Kolkata. I remember, I used to go 10 kms extra sometimes on my pulsar, just to get fuel from shell ! and the difference was noticeable.
Blade does knock with speed 91, and R1 knocks like crazy !

jd666 · 08-10-2010, 03:58 PM

what about octane boosters?? wont they work??

TenHut · 08-10-2010, 04:36 PM

Quote:

Originally Posted by fireblah

The sticker on tank says minimum 95 octane. I wish shell was available in Kolkata. I remember, I used to go 10 kms extra sometimes on my pulsar, just to get fuel from shell ! and the difference was noticeable.
Blade does knock with speed 91, and R1 knocks like crazy !

dude how can that be ? It says 91 on my sticker

Shell super is pure unadulterated fuel yeah. Pune has about 5 to 6 of them in every direction so getting it isnt a problem.

speed is not 91 octane at all..IMHO....

what is surprising me however is how why the octane figure on our stickers are varying ?

atul_chang · 08-10-2010, 05:05 PM

Quote:

Originally Posted by TenHut

R1 compression ratio = 12.7 : 1 very high -> will need higher octane
Gixxer compression ratio = 12.8 : 1 very high -> will need higher octane
Fireblade compression ratio = 12.3 :1 not high -> speed, power, extra premium, shell super..

Quote:

Originally Posted by TenHut

what is surprising me however is how why the octane figure on our stickers are varying ?

My sticker says 95 octane or above; but the compression ratio is just 10.5:1 which is not even high. Any comments?

TenHut · 08-10-2010, 06:05 PM

from Wiki
"Higher compression ratios will however make gasoline engines subject to engine knocking if lower octane rated fuel is used, also known as detonation. This can reduce efficiency or damage the engine if knock sensors are not present to retard the timing."

Another reason why the blade shouldnt knock is that its got a sensor which senses knocking and changes its ignition timing. I remember reading that somewhere !
I dont know if other bikes have that too...

Octane rating of 95 for a 10.5:1 compression ratio is a joke

Have u tried normal fuel ?

We need someone who really udnerstand this to post here. Anyone ?

08-10-2010, 11:13 AM	#1 (permalink)
sudipta_roy Senior Member Join Date: Jul 2004 Location: kolkata Posts: 197	Fuel problem for SBKS It's been all most 5 months that we are not getting 97 octane fuel for our Super bikes,so as of now we are forced to use IOC extra premium fuel. I have talked with the higher officials of BP but they also don't have any idea if speed 97 will be available in the near future so theirs no 2nd choice and it's tough to run bikes with octane booster every time,So the problems we are facing now is. 1)Lots of knocking in the lower rpms and in the time of sudden acceleration. 2)Some time starting problems. what you think friends,will these cause any major problem to the engine in the long run? what would be the effect on the injectors and in the throttle bodies? Is there any solution ? I know in lower compression bikes this won't be a problem even for GSX1300R my friend is not facing any such problem but owners like us who have R1 or 1000RR are facing lots of problem. __________________ http://www.youtube.com/watch?v=myfWv...eature=related

08-10-2010, 01:40 PM	#2 (permalink)
sunilg Super Moderator Join Date: Apr 2004 Location: Ghaziabad, UP, India. Posts: 5,075	Topic approved. __________________ (Been There Done That) x 3.25 Join xBhp On

08-10-2010, 03:47 PM	#6 (permalink)
fireblah Senior Member Join Date: Mar 2009 Location: Kolkata Posts: 753	The sticker on tank says minimum 95 octane. I wish shell was available in Kolkata. I remember, I used to go 10 kms extra sometimes on my pulsar, just to get fuel from shell ! and the difference was noticeable. Blade does knock with speed 91, and R1 knocks like crazy ! __________________ May the torque be with you.. My first F1 @ Sepang

08-10-2010, 03:58 PM	#7 (permalink)
jd666 Senior Member Join Date: Sep 2009 Location: Gurgaon/Faridabad Posts: 3,390	what about octane boosters?? wont they work?? __________________ My offerings to the gods of speed - - KTM Duke 200 - Yamaha RXZ 5 speed

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