Can someone post a link to the TTS sight please, i'm in the UK and this is the first i've heard of this system.
For some reason i cant find the web site.
Looking forward to learning more about this, as i have read quite a bit about the Thundermax and i am a bit sceptical about it.
By the way this is for an XR1200 and i'm hoping its gonna do the job, at the minute i have a pair of XIED's fitter i bought from Nightrider.com.
Lofty Bob put me on to this site, i know him from another site i visit.........Be gentle with me, i'm a bit thick.
Thanks for that Ozroder. This is my first injected HD and i am still feeling my way around this injection stuff, all i gotta do now is rob a bank so i can afford to do something about it.
In relation to the TTS what is a VE table? VE rear cyclinder and VE front cyclinder?
I understand most of the other stuff on the Data Master site but not this.
Thanks
Bob
Without wanting to confuse the issue, VE is Volumetric Efficiency and represents what percentage of the air it should take to fill the cylinder with the amount of air that does fill the cylinder..
A 96 cube engine at 100% VE breaths 96 cubic inches of air for every 2 revolutions.
If the VE was 50% it would only require 48 cubic inches of air for every 2 revolutions.
This table tells the ECU how much air is entering the engine and from that a fuel calculation can be made based on the required AFR. Narrowband oxygen sensors only work over a narrow range and as such a lot required AFR's are calculated not measured.
I am working without the TTS tables in front of me but:
1. You are travelling at 3000 rpm and 60KPA manifold pressure so the ECU looks at the AFR table and sees a required AFR of 13.8.
2. It checks the VE table which tells it 3000rpm and 30% throttle (note this is different) is a VE of 95%. The ecu then calculates the volume of air required for 3000rpm and mulitplies it by 95%. This tells it how much air is present and it can now come up with how much fuel is required for 13.8:1 AFR
3. Injector pulses long enough to supply the calculated fuel.
If you are working without oxygen sensors you would achieve a change in the amount of fuel delivered by altering either table. If you lower the required AFR you get more fuel, if you increase the VE you tell the ECU there is more air (even if there isnt) and get more fuel. As a well respected car efi tuner told me, don't get hung up on the numbers as much as the percentage change of things.
HTH
Surly
Scotty I think you need to come to Perth some time in Jul or Aug this year
I was talking to Scotty yesterday about a ride to WA in August as we both have leave then. Might be a goer, how abot it Aussietrain? make it a 3 bagger ride?????
Next question.
When I order my TTS do I have to order the MasterTune USB Cable?
Or can I use a normal usb cable?
Thanks men.
May or may not be an issue for you PIB but Windows Vista is pretty picky about which USB to serial adapters it will work with.
cheers Surly
