Dyno results
 

pistons 102mm , cam stage 1 raptor , filtro K&N , Snorkel remove , Dna Stage 2 , Arrow

http://img253.imageshack.us/img253/7...simohpkgaf.jpg

Maxx abbiamo prove concrete che il filtro stage 1 K&N produce meno HP (almeno 1.5) del DNA quindi ti suggerirei al piu' presto di comprare un filtro DNA stage 1, infatti guardati un poco queste prove:

http://xt660.com/showthread.php?t=9848

ciao CaptMoto cio� al posto del filtro K&N devo mettere il DNA ?

Si!! :sbike:

Nice work but how did he adjust the fuelling?

You do not say you have a PCIII or other fuel device, but I can see from the A/F ratio on the dyno sheet it has been altered. You would have got some more HP & Torque if you ran it richer in the lower revs around A/F ratio of 12.8:1 2000/4000 rpm.

I agree with Kev.

There is a very noticable power dip below 4000 RPM.

The low end RPM range is getting way to little fuel. Fix that and you will pick up a lot more torque at the low RPM ranges.

The gains at the low end might even carry over and give you another HP or so at the top end.

What altitude is this dyno?

With the mods you have in there, the HP is a bit low.

It migth be becuase you used a knobbly tyre.

If you did the dyno with slicks, then the HP output is actually very low. It should be around the 55HP mark easy with slicks and the mods you run.

I didn't did the test with the slick tyres but with the knobbly tyres and the pressure was controled. I too was a little worried about the low HP but the meccanical told me that in Italy we use the Fatt. Corr. EEC (like you can see at the graphic), this parametre correction change sensibly the results of the test.

I run nearly the same setup.


I changed my dyno run to the same correction factor that you used: EEC, 5.

http://i201.photobucket.com/albums/a...evxtx/2-25.jpg


Now this is the normal correction factor that I use. STD, 5.


http://i201.photobucket.com/albums/a...evxtx/3-20.jpg

grazie Kev

:sad5:

I do think you can get more power if you go richer from 2000 to 4000rpm & running a road tyre when on the dyno will produce a higher result.

vediamo se capmoto pu� aiutarmi ..
comunque c'e qualcosa che non va
possono essere le valvole di aspirazione maggiorate ?
io ho anche fatto lucidare i condotti e mi sono state aumentate le valvole di aspirazione di 1mm :013:


google
however there is something wrong
may be the increased intake valves?
I also polish the pipes and I have increased the intake valves of 1mm

with these mods you should have been about 55 on the wheel,the valves intake should increase with the cam so its not wrong.My bike has stage 3 megacycle cam without piston or head ported and it was dynoed at 53 on the wheel with almost destroyed tyres,you have increased the intake valves have you also increased the output valves?

Again you have not given us all the information. We need to know all the mods installed to the bike, so we can decipher dyno sheet readings

With +1mm inlet valves you should be using a stage 2 cam at the very least, I would even go to a stage 3 with a +2mm throttle body to get the full gains of your mod.

I still stand with my statement your bike will produce more power lower down if it is run richer.

I think Kev understood what you meant maxx3. All this talk of intake valves and stuff is a bit above my head no matter what language, sorry.

grazie per le risposte..
non � semplice spiegare tutto in una lingua che non conosco
praticamente mi hanno fatto un ported head (chiamato da off-the-road) in aggiunta c'e la maggiorazione delle valvole di aspirazione di 1mm




thanks for the answers ..
it is not easy to explain everything in a language that I do not know
I practically did a ported head (called off-the-road) in addition there is the increase of the intake valves of 1mm

No probelms Max, I would be no good at Italian.:sbike:

Marcel got a Off The Road head & cam job with standard valves.

http://www.xt660.com/showthread.php?t=7810.

http://www.xt660.com/attachment.php?...8&d=1231278005

I've read the topic of Marcel :headbang:
I was thinking that I would be at the same level..
I've increased the intake valves and the pipes of about 1 mm, but I couldn't increase the output valves because there was not enough space, so I've increased only the output pipes and the valves seat.
what should I do now?
Thank for all!

Your HP well might be up there & the Dyno is under reading. That is why I always do a before & after dyno runs to see the gain after the mod.

I would try a different dyno to see if the results are simular. Does the bike feel more power full.

You will not get the same results as Marcels with a stage 1 cam.

grazie ancora...

capmoto dove trovo sto DNA stage 1, ho fatto una ricerca ma non ho trovato nessuno che lo vende

Bene maxx3, avrai fatto una ricerca molto superficiale perche' se io metto DNA Filters Ltd su google mi esce la fonte originale sulla quale ci si puo' ordinare i loro filtri

Stage 1 = http://www.e-dnafilters.com/Product.asp?ID=555
Stage 2 = http://www.e-dnafilters.com/Product.asp?ID=665

Buona fortuna

grazie come sempre ..
heheh io lo cercavo in italia :toothy11:

stiamo lavorando sul corpo farfalla il massimo sono +2mm ?

Ora chiediamo a Kev. (I'll ask Kev)

Kev,

maxx3 is saying that they are reboring the throttle body up to 2mm and he is asking what is the maximum that these can be rebored to?

Thanks

3mm max, with a new spindle & throttle plate. Be careful the hole is not straight through, the throttle body is bored off centre & at an angle either side of the throttle plate. If boring to 3mm you will need a big cam to get all the gains from the extra air flow.

Thanks Kev,

Maxx3 puoi andare fino a 3mm pero' dovrai cambiare sia la farfalla che il pignoncino che la sopporta.

---------------------

Kev can you please give maxx3 a link where he can find the spindle and throttle plate? Thanks.

grazie mille...
invece portandolo a +2mm non serve cambiare il pignoncino ?

apparentemente sembra di no

visto che devo tornare sul banco
se non ho capito male il rapporto aria/benzina fino a 4000giri deve essere di 12,8 sopra i 4000giri di 13,5 esatto ?

sostituito il filtro k&n con il DNA

come sempre grazie

google

because I go back on the bench
unless I misunderstood the A/F ratio to 4000giri should be of 12.8 over 4000giri 13.5 right?

replaced the air filter k & n with the DNA

as always thanks

Correct & make sure you block off the AIS before the dyno run.