.: XT660.com - The #1 XT660 Resource :. - DNA Stage 1 Versus K&N Stage 1

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- - DNA Stage 1 Versus K&N Stage 1 - THE FACTS ( https://www.xt660.com/showthread.php?t=9848)

:cry[1]: I've just ordered the ruddy K&N filter and DNA 2nd stage lol

Quote:

Originally Posted by Dazzler (Post 89022)

:cry[1]: I've just ordered the ruddy K&N filter and DNA 2nd stage lol

Not all is lost, when you receive the K&N filter, do not open the box and put it up for sale on ebay as new and aim to get your money back then once you sell it, get te DNA one with the proceeds.

Good thinking CaptMoto.
CaptMoto I know Kev isn't available at the mo but does anyone know if the bike will run ok without the fuel increase with the 1st and 2nd stage filters? I was hoping to get the PCv with Autotune but as you know they haven't released it fir the XTX yet.

Has anyone heard how Kev is getting on?

Not heard from Kev, hopefully all is well.

As for the filters, you might need to increase the Co2 level but the best way to check your bike without a Dynometer is to inspect the spark plug say after a good 20 min ride, if its too dry and burnt you need more fuel go up 10 on the dash if its too wet (unilkely it will be) then take it down 5 until your spark plug is a clean tan colour.

Eventually the best way is to go the Power Commander way and all should be ok.

I have known however of a lot of our members who have run both filters with just a tiny Co2 adjustment and no power commander in their bikes at all still obtaining top performance.

Kev is back, quicker then he thought, now a left handed mouse operator & a bit slow on the typing.

The testing I did on the dyno showed that the bike will run lean with both filters on standard mapping. So far I do not know of any XT that has had it's motor damaged running just the filters without correcting the fuel mappimng.

I would always recommend one to fit a Power Commander or similar fuel device to get the most out of the mod. The extra fuel & air will really wake your bike up.

Thanks for the info guys, I'll check the plug after a short blast around and see how it looks. Once DynoJet starts selling the PCv I'll get that and see how she goes then.
Great to see you back Kev.

Quote:

Originally Posted by JMo (Post 88878)

Yes, thank you for those results Dino - impressive!

Will you be doing a similar comparison test regarding the drum type filter for the XT660Z Tenere?

xxx

Hi JMo,
Thank you for your kind comments.
We could do the same comparison tests for the XTZ if nessesary or post all the data for the DNA XTZ 660 stage 1 & stage 2 cover that we have already done.
When we designed the DNA XTZ 660 stage 1 & stage 2 cover we used the same procedure and software, so the results are guaranteed, there is no reason to worry.. trust us!
Regards
Dino

Quote:

Originally Posted by andressen (Post 88950)

and with the BMC filter? it is possible to know?

Hi Andresen,
Yes we can do the tests with the BMC if you can provide the filter.
Let me know and I will send you our address, so you can send the filter.
Best regards,
Dino

Quote:

Originally Posted by DNA (Post 88848)

Hi Guys,
Following your request I have finally put together a presentation of the DNA P-Y6E04-01 Stage 1 filter compared back to back with the K&N YA-6604 Stage 1 filter, a nd more useful information that will help you tune the XT 660 R /X.

The results are very impressive and enlightening.
All the air flow tests took place the same day on DNA’s Rotronics Computerized FlowBench, the test pressure was 1,5” inches of water and the results corrected to 25� celcius.
1. Presentation of the air filters:

a) Stock Yamaha air filter, single layer paper non-reusable air filter
b) K&N YA-6604 air filter, 4 layer cotton oil impregnated reusable air filter
c) DNA P-Y6E04-01 air filter, 4 layer cotton oil impregnated reusable air filter

2. Air Filter Design (see attached files)

a) The K&N YA-6604 air filter:
Media material 4 layers of K&N cotton
Number of pleats 11
Pleat Height 21 mm
Active Pleat length 115mm*
Pleat Pitch 6,36mm*
Oil volume 7ml
Total active filtering surface 53.130�mm*
� * as measured from the K&N sample filter we purchased.

b) The DNA P-Y6E04-01 air filter:
Media material 4 layers of DNA cotton
Number of pleats 9
Pleat Height 31 mm
Active Pleat length 124mm
Pleat Pitch 10mm
Oil volume 16,3ml
Total active filtering surface 69.192�mm

As we can see the DNA filter has larger pleat height 31mm(K&N 21mm), the pleat pitch is 10mm(K&N 6.36mm), the amount of oil DNA uses is more than double, and the most important +30.23% more active filtering surface..! for the same application.

At this point I must explain that the pitch of the DNA material is calculated taking under consideration many different variables; we use a specially developed algorithm and the final design varies from application to application. Even 0.1 of a mm can make a very big difference in airflow, speed of the air stream at the surface of the filter, turbulence and many more details that we can’t mention for obvious reasons.

So already from the start we have 2 very different air filters!

Let’s continue with the tests.

3. Absolute AIR FLOW tests: the filters are tested out of the air box on a custom made plenum; nothing causes turbulence or restrictions to the air flow
(see attachments).
The result is solely what the filter can give.

a) Stock Yamaha Paper Air filter
70.42 CFM @ 1.5” of H�O

b) K&N YA-6604
92.18 CFM @ 1.5” of H�O
+30.9% over stock

c) DNA P-Y6E04-01
122.4 CFM @ 1.5” of H�O
+73.81% over stock
+32.78% over K&N…?

4. Air Box AIR FLOW tests: the filters are tested inside the stock Yamaha air box,
To eliminate the losses (restriction) that the stock throttle body could cause we used a 48.6mm throttle body without the butterfly; the absolute largest that could be connected to the XT 660 Rubber trumpet.
Air box restrictions, shape, resonance, position of the air filter, if the design of the air filter suits the design of the air box and many more variables play an important role now.
Also I have added the Volumetric Efficiency (VE), of the XT 660 Engine, that occurs for every configuration, if the tuner takes 100% advantage of the extra flow.

a) Test 1:
Air box & std filter & snorkel
46.53 CFM (1318 lit/min) VE=0.539

b) Test 2:
Air box & K&N filter & snorkel
52.51 CFM (1486 lit/min) VE=0.608

c) Test 3:
Air box & DNA filter & snorkel
57.19 CFM (1619 lit/min) VE=0.663

d) Test 4:
Air box & DNA filter & Without snorkel
59.52 CFM (1685 lit/min) VE=0.690

e) Test 5:
Air box & DNA filter & DNA Stage 2 filter & snorkel
79.19 CFM (2242 lit/min) VE=0.918

f) Test 6:
Air box & DNA filter & DNA Stage 2 filter Without snorkel
79.89 CFM (2262 lit/min) VE=0.926

g) Test 7:
Air box all open Without filters, side cover, snorkel
(this test is for reference only the bike can’t be used on the road in this state)
88.6 CFM (2509 lit/min) VE=1.027

Finishing our detailed tests clearly the conclusion is That the DNA stage 1 filter is NOT the same filter as the K&N as the overall difference is Massive.

Also you can see why the fueling must be adjusted when going stage 2 and why you can get away with it, when removing only the snorkel.

I would like to thank to all the forum members for their attention, I hope everyone will enjoy the above info.

looking forward to hear your comments and start a discussion.
Best regards

Dino Nikolaidis

Love the tests, great work Dino. I must have missed these results yesterday when I posted. What I did like is you used a 4.6mm bigger throttle body then the standard XT 44mm, which would really show the future potential of your filters when modding a motor.

I did similar tests on the Dyno on what HP do you get with each mod http://www.xt660.com/showthread.php?t=4509

Quote:

Originally Posted by Kev (Post 89194)

Love the tests, great work Dino. I must have missed these results yesterday when I posted.

I did simular tests on the Dyno on what HP do you get with each mod http://www.xt660.com/showthread.php?t=4509

Just to give you some info the Raptor boys are flowing 130CFM with their +2mm valves, big bore, high lift cams & strocked +3mm throttle bodies, motors producing over 80HP, thats nearly double our 45HP & air flow of a standard XT.

So when I see we only have max 88CFM left in the air box, this tells me for bigger builds we need a newly designed airbox.
:YouRock: