08-26-2018, 11:21 PM
Cool, thanks ohiorider, that's true, i've seen the math but did not think of it.
66ft-lb= 89.48398Nm
I have tried K&N on a car (1.8 140HP stock) and couldn't feel a thing appart form the sound (and that that I saved some € on regular maintainance at the cost of cleaning/oiling the K&N
)
More opinions:
http://cb1100forum.com/forum/showthread.php?tid=4115
K&N is well known, yes, but I don't think that makes a difference.
[edit:]
http://cb1100forum.com/forum/showthread....2#pid46942
66ft-lb= 89.48398Nm
(08-26-2018, 11:01 PM)ohiorider_imp Wrote: Check my math, it wasn't my best subject.I think K&N filter or other after market air filter is one of the mod components (Air/Fuel, ignition/spark plug/coil and exhaust), alone, it makes no sense
Calculating torque and hp
If we know an engine's torque in foot pounds, and the rpm at which it was measured, we can calculate hp.
It would seem if we already know engine hp and the rpm at which it was measured, we can calculate torque in foot pounds.
HP Calculation
RPM x Torque (ft/lb)
----------------------- = HP
5252
Torque Calculation
HP
---- X 5252 = Torque (ft/lb)
RPM
I used hypothetical to test hp formula (7000rpm x 66 ft/lb torque divided by 5252)
Answer = 87.96 hp
torque hypothetical (87.96 hp divided by 7000 rpm x 5252) Answer = 65.99 ft/lb torque
(Where are the engine rpm's shown on your Dyno graphs?)
(08-26-2018, 10:02 PM)jtopiso_imp Wrote:(08-26-2018, 08:12 PM)itstuantran_imp Wrote: "How do you know that the K&N performs any better than stock?"
I'm not an expert to explain you on how the K&N perform better than stock but this is what most often a mod and also, it's a recommendation from the dyno tech guy. I believe after market stuff from well known manufacturer such as K&N has its own value over stock, which could be verified or proved by expert only
(08-26-2018, 07:10 PM)jtopiso_imp Wrote:(08-26-2018, 01:56 AM)itstuantran_imp Wrote: Unfortunately the tech guy could not get the signal for torque, i'm also excited to see those too. In fact, i can tell a significant pull from 3k RPM and above compared to stock
(08-26-2018, 12:34 AM)HellFishTat_imp Wrote: did you get torque #'s? I'd be interested in seeing those.
I thought all dynos measured torque, and from it and rpm, they calculated power. So they don't measure power, but calculate it.
I guess this depends on the dyno.
(08-24-2018, 10:45 PM)itstuantran_imp Wrote: Yup, it should be apple to apple for better comparison but i did not have chance to do that. For actual performance, it's quite a clear response in all RPM range as i'm using it to commute daily so the response felt quite clear.
By removing the stock dual exhaust, which weighted 15 kg and replaced by full titanium system with 6 kg, a net save of 9 kg will definitely boost the performance, not mentioning to and free cat header will help boost much better, K&N air filter and TSR air intake, cooped with bazzaz tuning, it really transformed the bike
(08-24-2018, 09:04 PM)jtopiso_imp Wrote:(08-24-2018, 07:11 PM)itstuantran_imp Wrote: As Flyrider mentioned he saw several graphs of stock dynos around 82 - 83Hp.
(08-24-2018, 07:05 PM)jtopiso_imp Wrote: It would be nice to test the bike from stock with no mods. Otherwise, we can only guess!
How do you know your intake performs better than stock?
Yes, but you need to compare apples to apples (same dyno) or you'll be just guessing.
Yes, but you need to compare apples to apples (same dyno) or you'll be just guessing. and the dynoed video
https://youtu.be/5PZmOjAIsoc
How do you know that the K&N performs any better than stock?
I agree that we can tell that a lighter bike will perform better, but the other stuff... I have my doubts. Maybe with the K&N it "feels" different, sounds different, but I remain skeptical
I thought all dynos measured torque, and from it and rpm, they calculated power. So they don't measure power, but calculate it.
I guess this depends on the dyno.
(08-24-2018, 10:45 PM)itstuantran_imp Wrote: Yup, it should be apple to apple for better comparison but i did not have chance to do that. For actual performance, it's quite a clear response in all RPM range as i'm using it to commute daily so the response felt quite clear.
By removing the stock dual exhaust, which weighted 15 kg and replaced by full titanium system with 6 kg, a net save of 9 kg will definitely boost the performance, not mentioning to and free cat header will help boost much better, K&N air filter and TSR air intake, cooped with bazzaz tuning, it really transformed the bike
(08-24-2018, 09:04 PM)jtopiso_imp Wrote:(08-24-2018, 07:11 PM)itstuantran_imp Wrote: As Flyrider mentioned he saw several graphs of stock dynos around 82 - 83Hp.
(08-24-2018, 07:05 PM)jtopiso_imp Wrote: It would be nice to test the bike from stock with no mods. Otherwise, we can only guess!
How do you know your intake performs better than stock?
Yes, but you need to compare apples to apples (same dyno) or you'll be just guessing.
Yes, but you need to compare apples to apples (same dyno) or you'll be just guessing. and the dynoed video
https://youtu.be/5PZmOjAIsoc
How do you know that the K&N performs any better than stock?
I agree that we can tell that a lighter bike will perform better, but the other stuff... I have my doubts. Maybe with the K&N it "feels" different, sounds different, but I remain skeptical
I have tried K&N on a car (1.8 140HP stock) and couldn't feel a thing appart form the sound (and that that I saved some € on regular maintainance at the cost of cleaning/oiling the K&N
More opinions:
http://cb1100forum.com/forum/showthread.php?tid=4115
K&N is well known, yes, but I don't think that makes a difference.
[edit:]
http://cb1100forum.com/forum/showthread....2#pid46942
I have tried K&N on a car (1.8 140HP stock) and couldn't feel a thing appart form the sound (and that that I saved some € on regular maintainance at the cost of cleaning/oiling the K&N
)More opinions:
http://cb1100forum.com/forum/showthread.php?tid=4115
K&N is well known, yes, but I don't think that makes a difference.
[edit:]
http://cb1100forum.com/forum/showthread....2#pid46942