SV650.org - SV650 & Gladius 650 Forum



SV Talk, Tuning & Tweaking Discussion and chat on all topics and technical stuff related to the SV650 and SV1000
Need Help: Try Searching before posting

Reply
 
Thread Tools
Old 17-10-06, 11:45 PM   #11
Stu
Trinity
Mega Poster
 
Stu's Avatar
 
Join Date: Jun 2006
Location: Guildford
Posts: 8,027
Default

Thanks, so it's the starting point you adjust, so it can have an effect throughout the rev range.
Stu is offline   Reply With Quote
Old 18-10-06, 08:53 AM   #12
Baph
Guest
 
Posts: n/a
Default

Quote:
Originally Posted by Stu
Thanks, so it's the starting point you adjust, so it can have an effect throughout the rev range.
Can and will. However, I reckon (having done the TPS adjustment) that this is a very small difference.

Once you make the modification, the throttle moves less to increase (I'm assuming it's an increase, I haven't tested) the resistance given, which drops the current flowing to the ECU.

Obviously if you change how soon this resistance (by removing the null area of throttle play - as far as the FI is concerned), there will be a greater resistance at any given throttle position after the adjustment is made, when comapred to before the adjustment is made.

However, due to the nature of the device used as a TPS (yo-yo resistor), this is likely to be very small.

So yea, an "improvement" at all revs, but the higher the revs go, the less difference is noticed. Or at least, that's my findings.
  Reply With Quote
Old 19-10-06, 10:21 PM   #13
Sid Squid
No, I don't lend tools.
Mega Poster
 
Sid Squid's Avatar
 
Join Date: Jul 2003
Location: Skunk Works, Nth London
Posts: 8,680
Default

Quote:
Originally Posted by Stu
Very now.
The TPS adjustment is adjusting when the line moves from the middle of the screen to the top. Which to me sounds like an on off switch.
What Baph says makes sense, but does not equate to the sensor having 2 positions IMO. Who is right?
Wrong. The TPS is a potentiometer, the display is a voltmeter, the throttle position is indexed as a voltage by the FI/ignition system electronics, the system doesn't 'add more fuel' when the display changes, the throttle position is one of a number of variables the system uses to set injector duration and ignition timing, I suspect the TPS's most noticable effect is ignition, I imagine the timing is set for idle stabilisation.
__________________
If an SV650 has a flat tyre in the forest and no-one is there to blow it up, how long will it be 'til someone posts that the reg/rec is duff and the world will end unless a CBR unit is fitted? A little bit of knowledge = a dangerous thing.

"a deathless anthem of nuclear-strength romantic angst"
Sid Squid is offline   Reply With Quote
Old 19-10-06, 10:47 PM   #14
Baph
Guest
 
Posts: n/a
Default

Quote:
Originally Posted by Sid Squid
Quote:
Originally Posted by Stu
Very now.
The TPS adjustment is adjusting when the line moves from the middle of the screen to the top. Which to me sounds like an on off switch.
What Baph says makes sense, but does not equate to the sensor having 2 positions IMO. Who is right?
Wrong. The TPS is a potentiometer, the display is a voltmeter, the throttle position is indexed as a voltage by the FI/ignition system electronics, the system doesn't 'add more fuel' when the display changes, the throttle position is one of a number of variables the system uses to set injector duration and ignition timing, I suspect the TPS's most noticable effect is ignition, I imagine the timing is set for idle stabilisation.
Potentiometer - technical term for a yo-yo resistor

If it measures current or voltage, it achieves the same purpose.

Whether is increases the fuel squirted by the injectors or not, well, that's internal combustion, not my game. Surely it's a variable in the amount of fuel used though.
  Reply With Quote
Reply


Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Chain adjustment. Gary C SV Talk, Tuning & Tweaking 6 08-06-08 06:20 PM
Chain Adjustment plowsie Bikes - Talk & Issues 14 22-04-08 10:26 AM
TPS adjustment Surly SV Talk, Tuning & Tweaking 18 24-06-07 05:15 PM
Adjustment of value for mileage mastiffmat Bikes - Talk & Issues 7 15-08-06 09:21 AM
chain adjustment wanted sv650 SV Talk, Tuning & Tweaking 8 11-05-06 01:01 PM


All times are GMT. The time now is 07:18 AM.


Powered by vBulletin® - Copyright ©2000 - 2025, Jelsoft Enterprises Ltd.