I have a 96 Passat TDI that I installed an Upsolute power chip in about 1.5 years ago.
Power improvement is startling and fun. Fuel economy has not improved. I think that can only be accomplished under very controlled driving, perhaps keeping the rpm at 2000 where the torque is the highest and engine the most efficient. The chip increases torque by a huge ammount and horsepower by about 15 to 20%. Theoretically one could get better mileage perhaps but in the real world I would say no, especially because of the enjoyment of increased power tends to lure the driver into using it, which means less fuel economy. I have lost about 3 mpg (from 37 to 34 mpg in the city), more from my driving than because of the chip... but then the chip changed my driving style. If you drive very calmly you should have the same fuel economy and quite possibly better since it requres very little pedal to really get moving at low speeds. Maybe the boxes by speed tuning and Van Aken are adjustable so that one could set them to create better efficiency at common and useful rpm ranges and drive accordingly. A ton of information can be found at http://www.tdiclub.com/ on all the chips and tuning boxes since these guys are diesel enthusiasts and gearheads. Chuck ----- Original Message ----- From: Busyditch To: biofuel@yahoogroups.com Sent: Tuesday, March 23, 2004 8:45 PM Subject: [biofuel] VW TDi chip box Has any member used one of these "smart" boxes, such as Speed Tuning or Van Aaken or such? Was wondering if they really improve mileage and power. Thanks Biofuel at Journey to Forever: http://journeytoforever.org/biofuel.html Biofuels list archives: http://infoarchive.net/sgroup/biofuel/ Please do NOT send Unsubscribe messages to the list address. To unsubscribe, send an email to: [EMAIL PROTECTED] ------------------------------------------------------------------------------ Yahoo! Groups Links a.. To visit your group on the web, go to: http://groups.yahoo.com/group/biofuel/ b.. To unsubscribe from this group, send an email to: [EMAIL PROTECTED] c.. Your use of Yahoo! Groups is subject to the Yahoo! Terms of Service. [Non-text portions of this message have been removed] ------------------------ Yahoo! Groups Sponsor ---------------------~--> Buy Ink Cartridges or Refill Kits for your HP, Epson, Canon or Lexmark Printer at MyInks.com. Free s/h on orders $50 or more to the US & Canada. http://www.c1tracking.com/l.asp?cid=5511 http://us.click.yahoo.com/mOAaAA/3exGAA/qnsNAA/FGYolB/TM ---------------------------------------------------------------------~-> Biofuel at Journey to Forever: http://journeytoforever.org/biofuel.html Biofuels list archives: http://infoarchive.net/sgroup/biofuel/ Please do NOT send Unsubscribe messages to the list address. To unsubscribe, send an email to: [EMAIL PROTECTED] Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/biofuel/ <*> To unsubscribe from this group, send an email to: [EMAIL PROTECTED] <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
