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.: XT660.com - The #1 XT660 Resource :. ( https://www.xt660.com/index.php)
-   Performance Modifications & Enhancements ( https://www.xt660.com/forumdisplay.php?f=52)
-   -   AIS Removal ( https://www.xt660.com/showthread.php?t=52)

stevej 31-12-07 21:05
tps
 
After thinking about what i just put in last message and reading through info on tps adjustment i think by setting the tps back a tad may reduce the run on.

mnb 19-08-08 23:13
Quote:
Originally Posted by Kev (Post 42015)
The verdict

There is no gain in power by disconnection the AIS, it may help with poping back of the exhaust on over run when using after market pipes by 99% less poping. It will help with the burning of hydrocarbon emissions if connected. It will effect the results of a fuel map if you are running your bike on a dyno setting up your Air/Fuel ratio & the AIS is just unpluged at the electrical connector & not blocked off at the air intake.
could you please explain will it (and why not if not) effect A/F ratio if I only block pipe leading to AIS ? why is it diffrent than just disconnecting electrical plug from AIS? maybe I understand somthing wrong.
I have the same setting: xtr, 07, acraps. and all I want is to reduce poping back of the exhaust.

Kev 19-08-08 23:43
If you unplug the AIS electrical connector the valve will remain open all the time passing air into the exhaust, which will cause the popping noise.

That is why you block the intake hose to the AIS & leave the connector connected. The valve will then work as normal but will not allow any air into the exhaust system.

If the bike is on the dyno & the AIS is still connected it will effect the readings on the dyno's CO reader, it will say it is leaner then it really is & a incorrect fuel map will be made by the dyno tuner.

Gravityfreak 20-08-08 01:51
Quote:
Originally Posted by Kev (Post 65313)
If you unplug the AIS electrical connector the valve will remain open all the time passing air into the exhaust, which will cause the popping noise.

That is why you block the intake hose to the AIS & leave the connector connected. The valve will then work as normal but will not allow any air into the exhaust system.

If the bike is on the dyno & the AIS is still connected it will effect the readings on the dyno's CO reader, it will say it is leaner then it really is & a incorrect fuel map will be made by the dyno tuner.
Kev - this last paragraph is confusing to me. If the AIS is left connected (electronically) but blocked off (mechanically) - will this be ok as far readings on the dyno is concerned?

Kev 20-08-08 02:07
Quote:
Originally Posted by Gravityfreak (Post 65319)
Kev - this last paragraph is confusing to me. If the AIS is left connected (electronically) but blocked off (mechanically) - will this be ok as far readings on the dyno is concerned?
That is correct.

You can unplug the connector if you want but is not necessary. Once the intake pipe is blocked off the air flow is stopped & having the connector on or off does not make any difference to the air flow.

mnb 20-08-08 11:19
Quote:
Originally Posted by Kev (Post 65313)
If you unplug the AIS electrical connector the valve will remain open all the time passing air into the exhaust, which will cause the popping noise.

That is why you block the intake hose to the AIS & leave the connector connected. The valve will then work as normal but will not allow any air into the exhaust system.

If the bike is on the dyno & the AIS is still connected it will effect the readings on the dyno's CO reader, it will say it is leaner then it really is & a incorrect fuel map will be made by the dyno tuner.
ok, tnx, now I understand little bit more.
my last question: like AIS confuse dyno, will blocked AIS confuse ECU by false reading of lambda sensor ?

btw, are there any instuctional pictures for blocking AIS ?
can I just block them with duck tape ?

Kev 20-08-08 13:08
Quote:
Originally Posted by mnb (Post 65333)
ok, tnx, now I understand little bit more.
my last question: like AIS confuse dyno, will blocked AIS confuse ECU by false reading of lambda sensor ?

btw, are there any instuctional pictures for blocking AIS ?
can I just block them with duck tape ?
The AIS would normaly run when the O2 sensor is in the open loop circuit, so would not effect the fuel mixture.

Have a look in the mod section under 6/ AIS removal.

http://www.xt660.com/showthread.php?t=630

colros 20-08-08 14:04
Quote:
Originally Posted by mnb (Post 65333)
btw, are there any instuctional pictures for blocking AIS ?
can I just block them with duck tape ?
I would not use Duck tape there it looses its sticky especially arround oil, Kev's mod is far better. :sunny:

mnb 20-08-08 22:29
just another thought: what if i disconnect ais hose from airbox, than wrap plastic exit pipe on airbox with tape and put hose back on that wrapped plastic pipe ?

Kev 20-08-08 23:21
Quote:
Originally Posted by mnb (Post 65370)
just another thought: what if i disconnect ais hose from airbox, than wrap plastic exit pipe on airbox with tape and put hose back on that wrapped plastic pipe ?
I would not do that, you could go down to the local hardware shop & get a plastic bung, the ones that are used to cover the ends of chair legs or pipes.

You could then fit one on the air box exit & then push the AIS pipe over it.


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