How many LC-1 users have experienced sensor overheat ? ..what is the mileage you have put on your LC1`s and how accurate are they after 10k miles or so
have any of you used them on the track ( lapping not drag )
i am considering either making or purchasing a copper plate . such as this one :


is it necessary ?

Mods on car are :
Stock twins
Tuned ECU
13 PSI
Down pipe 3"
exhaust ( high flow cat ) 3"
Intercooler and intakes ...
will tap B4 the 2-3" after the DPipe/MidPipe flange

thx

 

I made a heat sink like that, but even my little 2 liter BMW M10 overheated it. Instead, I got this bung extender for the 7, and it has worked much better:

http://www.034motorsport.com/product...roducts_id=542

you just have to make sure the internal duct is aligned with exhaust flow.

Dave...

 

wow 100 bux again .. damn lc1 kit costed me 2 bills ...

thx

 

I have about 7k on my lc1. It sits in the ASpec downpipe about 6" back from the turbo no heat sink . The turbo is a GT35r with a blanket and the downpipe is ceramic coated. I have had no problems with my wideband.

 

I should have mentioned that my cars are pretty much track-only cars, so they do see higher temps than a DD. You can make one of those heat sinks in about 5 minutes, so it is certainly worth experimenting with before throwing money at the bung extender. Good luck,

Dave...

 

Mine has been in for over a year and a half, no heat sink. Mounted in the end of the downpipe, still accurate and never over heated. Prob 6k on it.

 

I'm on my third sensor. First overheated after about 800 miles. It was located about 24" from the turbo, no heatsink. That heatsink costs more than a sensor so I was kind of reluctant to buy one. The second one I located way in the back of the midpipe area, right before the catback flange. That ran fine for about 1000 miles. Then I put the car down for almost a year and forgot to re calibrate the heater. 600 miles after I put the car back together I fried the second sensor. I'm now on my third in the same location. I still haven't bought the heatsink. It is frickin 90 dollars, and a sensor is $60ish at Carquest.

Note that my exhaust temps I think are pretty damn high with my current setup. I fried both my preturbo EGT probes.

 

wow ... that is hot .. in terms of EGT`s probes...i have about 20,000 km`s on my prosport probe and ... still transmitting .. it`s placed between the 2 turbo exhaust wheels ... b4 the downpipe

i will install it and c what happens ...

thx for all the input ...

 

I have went through 3 sensors in about 5000 miles. The First one was without a sheetmetal heat sink the last one was replace just recently and lasted much longer with the heatsink.

 

It makes you wonder if aftermarket widebands (LC1 especially) have crappy heater control logic compared to OEM. The Rx-8 has a wideband for a front O2 sensor before the cat and they last. I'm sure it still gets plenty hot considering the temperatures I have recorded before when out of boost.

 

The bung extender actually removes the sensor from the direct exhaust flow and uses a duct to move the exhaust past the sensor. Probably adds a little delay to the sensor reading, but it does seem to extend its life significantly - at least for me. For the heat sink to be most effective, it should be in some air flow; easier said than done.