Karbonius Race Airbox

[pokeybritches]

You can see live readouts with the BMW programs. We have our own program that records from K-line. STFT is short term fuel trim, and LTFT is long term fuel trim. Each tells a story. The LTFT are applied immediately upon startup, but the STFT aren’t active until after the oxygen sensors are warmed up.

Happy to help!

 

[RedUn]

OK - hope anyone is still following!

Today I trimmed the mouth on the intake - used a Dremel thin cutting wheel, and then sanded. I may trim a little more as it is still tight against the front end. This was work in progress, I sanded back to the edge of the black line, and feathered the curve into the uncut part.

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All in and car started

2024-06-08_14-04-37_238.jpeg

Then an issue - the car would start, I could rev it once, but then not again, it would just tickover. Only fault code on INPA after a clear of historic faults was no MAF reading.

In the end I plugged the MAF back in, and after a couple of coughs, it would rev. This is strange as I am pretty sure I had the car revving with the intake fully off, and nothing plugged in??

Airbox looking good

Mines coming off again to fit the thermal kit, intake temps not as low as I'd like when logging, also getting a custom blanket made for the oil filter to protect the IAT. Will let you know how it goes.

Last job, new knock sensors, got a weird timing pull at 7krpm :|

 

[Justino]

The oil filter blanket sounds interesting idea.

I've always felt that the air doesn't hang around for long enough in the airbox for it to heat up that much?

 

[Justino]

I've diverted to getting the brakes back together today. Rears fully built back up



Fronts ready to be refitted once I have cleaned inside the arch up, then can bleed everything through.



As I am doing a brake fluid flush, I also want to blead the clutch - anyone done that, presuming its an under the car job to get to the bleed nipple?

 

[RedUn]

It's on the slave cylinder, while your at it, ditch the cdv if not already done

 

[Justino]

I've been told it has been removed, but will visually check that is the case. It probably is as I've never noticed any strange clutch experiences.

 

[Justino]

I've been told it has been removed, but will visually check that is the case. It probably is as I've never noticed any strange clutch experiences.

It wasn't! That is annoying as I'd asked the specialist to remove it when the ABS pump was being swapped some time ago. I've probably adapted to the valve, but want it gone as I originally intended. Is it a case of removing and just joining the 2 pipes together that originally screwed into the valve?

 

[RedUn]

I've been told it has been removed, but will visually check that is the case. It probably is as I've never noticed any strange clutch experiences.

It wasn't! That is annoying as I'd asked the specialist to remove it when the ABS pump was being swapped some time ago. I've probably adapted to the valve, but want it gone as I originally intended. Is it a case of removing and just joining the 2 pipes together that originally screwed into the valve?

Yep literally remove it and connect back to the slave cylinder

Difference is huge!

 

[Justino]

Hopefully getting close to having a functioning car! What started as just fitting a new starter motor has turned into a full brake refurb front and rear, Karbonius air box, and a few other minor odds and ends.

Removed the CDV at the weekend and flushed through with new fluid. A bit fiddly with access underneath, I could do with a car creeper to help, on your back, and then getting a 7mm spanner on the bleed nipple. I use a pressure bleeder kit for this and the brakes.

CDV in situ


And removed - didn't take a picture afterwards, but as others have said, once the CDV is removed, the 2 ends of the pipes join straight back up.