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| whats the differance between between 0258007123 & 025800 http://gt4dc.co.uk/forum/viewtopic.php?f=13&t=2446 |
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| Author: | datajon [ Fri Jun 13, 2008 12:44 pm ] |
| Post subject: | whats the differance between between 0258007123 & 025800 |
who knowns what the difference is between the bosch 0258 007 057 and the bosch 0258 007 123 wideband sensor.. 
I know the lead is longer on the 0258007123 when compared to the 0258007057 are they the same sensor in all particle sense. the longer lead would be very dandy which i have 2 off,as well as another stuffed 0258007123 adding to the growing collection. cheers |
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| Author: | Kris [ Sat Jun 14, 2008 1:57 pm ] |
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Does Google help? Looking forward to seeing the swathes of datalogging info you are collecting! 
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| Author: | datajon [ Sun Jun 15, 2008 5:29 pm ] |
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google is no use thanks any way. |
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| Author: | datajon [ Sat Jun 21, 2008 2:15 pm ] |
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cheers guys ,,,,,got local mtr factor to supply 63 inc vat bosch ... its typical they fail when you are in the middle of something important. |
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| Author: | Kris [ Sat Jun 21, 2008 7:59 pm ] |
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Did you find a difference between the 2 sensors? |
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| Author: | Diceman [ Sat Jun 21, 2008 9:36 pm ] |
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Seems that finding manufacturers data sheets for wideband sensors is very difficult. I spent an age trying to search for bosch/VAG part numbers for the wideband sensors on my LC-1. I have heard that there is a longer wire version of teh standard sensor and also plenty of sensors out there that have different connectors but "still work" once connector swapped. I can't however provide a concrete response to your question. How are your sensors failing DJ? I also have a wideband graveyard but is normally due to user error. 1) died after 100 miles (forgot to switch it on for a 10 mile journey and heater open after) 2) erghh exited tailpipe stage left at 90 MPH aftera failed attempt at a tailpipe fixing setup. 3) lasted 6K miles and was dead one morning for no apparent reason. |
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| Author: | datajon [ Sun Jun 22, 2008 11:13 am ] |
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HI JP. they fail from using oem narrow band install area, I know i should not, but some installs have no other option, they run toooo hot up top. others failed from running too lean for too long getting to hot, apart from that they seem okay. once pump open error, time to think about replacement, often a full recal will sort but the end is neigh. like having a few spare,like using them over slow narrow band. |
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| Author: | two_OH_five [ Sun Jun 22, 2008 12:29 pm ] |
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Why not knock up some spacers/heatsinks for them Jon |
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| Author: | Kris [ Sun Jun 22, 2008 1:23 pm ] |
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I think Innovate recommend using a heatsink if too close, iirc they sell them aswell 
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| Author: | datajon [ Mon Jun 23, 2008 12:42 pm ] |
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problem is when used too close they are just too close, even using copper heatsink will not stop them from the glowing heat... killing them .. its okay when they are mounted low down , this is not always possible.. spacing would be an option but the tip must remain in mid stream 60 quid a pope is not much of a price to pay, just charge it out.. |
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| Author: | TrackToyFour [ Mon Jun 23, 2008 1:50 pm ] |
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At Race Retro the guys on the Graham Goode/Innovate stand showed us a nice tail pipe clamp for mounting the sensor. Not a permanent solution but fine for road mapping. |
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| Author: | Diceman [ Mon Jun 23, 2008 4:27 pm ] |
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Don, That is ok for full chat mapping but no use for light load/low rpm where you end up measuring some atmospheric air. I can understand killing them if mounted at stock O2 sensor location (don't know how much cooler it is at the bottom of the downpipe though). |
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| Author: | TrackToyFour [ Mon Jun 23, 2008 4:50 pm ] |
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Diceman wrote: Don, That is ok for full chat mapping but no use for light load/low rpm where you end up measuring some atmospheric air.
That surprises me, why would they sell something that doesn't do the full job? The implication from your comment is that it is possible for negative pressure in the tail pipe i.e. for air to flow back UP the tailpipe  . I would have thought that there would be positive pressure at all times even under light load/closed throttle.
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| Author: | Kris [ Mon Jun 23, 2008 6:26 pm ] |
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I agree with JP, tailpipe is not ideal. The temps in the bottom of the DP with a big handful of sustained throttle is max ~500deg C Haven't measured the temp just at the turbine exit |
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| Author: | Diceman [ Mon Jun 23, 2008 8:12 pm ] |
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not necesarily negative pressure - my comment was a little generalised/crap. At idle the lag time from making a change to seeing it at teh tailpipe is considerable. Whilst there will be positive pressure in the exhaust the winds we have here may overcome them and mix if near the tailpipe which combined with the lag time is difficult to get it accurate when mapping. These are my experiences anyway of a reading that is not necesarily accurate/current under light load & low RPM. For full chat it is fine. |
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