You can pick the cheapo ones up off ebay as you only need the housing so you can swap in the sensor from the standard maf.
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You can pick the cheapo ones up off ebay as you only need the housing so you can swap in the sensor from the standard maf.
won't the 850's maf surface area be under size for the housing then, or do you then adjust the scaling to allow for the smaller surface area of the 850's sensor to the diameter of the maf housing, else I could see some massive leaning out is due to happen as the throttle gets opened.. ??
There is a program (available on the M4.4 wikia site) that adjusts the scaling in the ecu to account for the increase in housing size. Basically the stock values are multiplied by 2.24 for the 3.5" MAF
Oooh, it's been a while :)
So I haven't been happy with the fuelling settings of the ecu. After some research it turns out the VXR 470cc injectors aren't 470cc they actually flow the same as the 'big greens' at approx 440cc. The only difference between the two injectors is the greens are 12ohms impedance and the vxr blues are 14.5ohms impedance.
Not that much of a big deal though as they were cheap enough and they flow the same as greens.
Just need to change some settings and hopefully that will sort things out.
Next project is getting the 3.25" MAF to fit (unfortunately it's not a 3.5" like I first thought but still better than standard)
Nice to see an update Dave and I look forward to hearing how you get on with the new MAF.
Also been getting on with the epic that is the 320mm brake conversion.
The calipers and brackets are a bit rusty so I made my own blasting cabinet out of a huge IKEA storage box.
Got one bracket done and sprayed up, now to do the rest...
https://imgur.com/a/o70NKBchttps://i.imgur.com/p4k0iWEl.jpg
Looks good, sand blasted?
I'm using a 20/40 grit Garnet media. Not a perfect finish but gets all the rust off.
Here's my bodged blast cabinet :)
https://i.imgur.com/zR8XBK7l.jpg
Fair do's Dave, looks ok and is a fully functional bit of home made kit, can't be classed as botched in my book, nice work Sir.
This project is all over the place at the moment, need to make a list and start doing one job at a time.
So far I've got one of the brake calipers/bracket ready and have managed to get a set of 320mm discs dirt cheap so I can fabricate an adapter (as I like to do it the hard way). The discs are from a V70 P2 with the 68mm centre bore. This means that they fit without needing to be machined but the offset is 2mm different to the V50 320mm discs which then means an 8mm adapter plate won't work so I have an idea......watch this space.
Also got a pair of XC90 calipers dirt,dirt cheap so may have a look at what I can do with those on my spare hub.
Anyway, on to other bits I've got sorted.
Finally I made the 3.25" MAF adapter with my 3D printer (5.5 hours of printing later) :D :D
https://www.youtube.com/watch?v=5hiKmSwwCMI
And after some cutting of a spare airbox lid, some superglue and 'hot snot', fettling a 90 degree silicone reducer and some aluminium tubing I have this:
https://i.imgur.com/eGdnjAKl.jpg
I modified the ecu binary to account for the increase in size and all is working great :)
So it was time to make the brackets for the 320mm conversion.
Made some templates with different offsets to see which would work the best
https://i.imgur.com/k8h6GsAl.jpg
Chose a 13mm offset and transferred to the 6mm steel plate.
https://i.imgur.com/Wbb5pbwl.jpg
Some drilling, tapping and grinding later
https://i.imgur.com/NvfQpAsl.jpg
The plate is a bit thin so made an outer support with some 8mm steel and a spacer
https://i.imgur.com/RYfFVhNl.jpg
Just need to weld up the spacers and spray the brackets.
In the meantime the spare parts for the compressor have arrived so I can get on with blasting the other caliper to get ready for painting.
Just read through your thread. I like how you’ve made all your bespoke fittings yourself. Very interesting read.
The kit is all ready to go on, just waiting for the weather to get better :(
https://i.imgur.com/1QKi7Gbh.jpg
Finally got some good weather :D
All fitted with new hose (old one too short)
https://i.imgur.com/Ugdk2X4l.jpg
Old vs New
https://i.imgur.com/gbdmavIm.jpghttps://i.imgur.com/HalwMoam.jpg
https://i.imgur.com/JGjGkD8m.jpghttps://i.imgur.com/qgvxv8mm.jpg
Braking is a whole world better :)
Now to move onto the rear brakes.....
Excellent improvement, 320mm disc fills the wheel a whole lot better too!
What's the plan at the rear?
Yeah it did look a bit chavvy before with tiny looking discs inside big rims.
The good thing about them is I can use the 320mm disc off the V70 so I don't have to machine the centre of the disc like when using the 320mm V50 disc.
Also managed to get some brembo pads for £35, though they are not performance pads. Performance pads are quite expensive unfortunately.
The rear discs are solid on mine, so I'm looking at fitting the vented discs and calipers off the XC90 which are also a bit bigger (and fill the wheel better :)).
I take it you couldn't use 330mm discs and calipers from a V70R/S60R?
Unfortunately not, my budget doesn't allow for that kind of spend. Plus the calipers seem quite rare, a quick ebay search found none.
I thought about using the 330mm discs but they are too wide for the calipers at 30mm vs the 25mm of the V50. The V70 ones I'm using are 28mm and fit but I had to shave 1mm off the caliper bracket as I got the offset wrong. .
This was a budget build too, the old calipers were in need of a refurb so I thought I'd 'upgrade' (as it were).
Total costs (for anyone interested): calipers £80, discs £40, pads £35. Brackets and bolts cost around £30 plus the time fabricating them, brake hoses £14. Sandblasting and paint were extra but not 'essential'.