lmao i forgot the car had an outside....

More than likely an aftermarket electronic speed pickup. It will count the bolts as the driveshaft turns as pulses, which can be then calibrated to relate to wehicle speed.
Whether this is an aftermarket speedometer gauge, or (more likely) an input into the ECU will be stated by John.
Also plausible is this is a simple location for the rear tire speed sensor for traction control. A similar unit would then need to be mounted to one of the front hubs, although simply sourcing stock ABS sensor parts would likely be the simplest method of achieving that secnario.

You, sir are correct!
It's the speed sensor for the ecu, used for launch control and to let the ecu know which gear the car is in (it compares engine rpm with driveshaft rpm). It also allows vehicle speed and gear to be datalogged.



:lol:

Still curious what ECU you're going to run.
Hopefully we know by the end of the year? :D

The pace that you build this car astounds me, considering you have a full time job, as well as spend what appears to be a lot of time racing. Do you not sleep, or are there more hours to a day in the netherlands?

Love the wheels :-)

I actually wish there were more hours in a day :lol:, but yeah I don't sleep a lot :(, the day job takes about 50 - 60 hours a week, and about half of my free 'working on car stuff' time is spend working on other people's stuff :blush:, I'm not the only one around here trying to get their winter projects done before the weather picks up and the rallycross / trackday season starts. So pretty much working around the clock at the moment, but on the upside, I think the coming year will be great! :icon_tup:




Thanks :), BBS RZ394 wheels, 16x8.5J ET13. I believe they came on older BMW 6 series.



Just fitted the pinion snubber and got all the suspension bits bolted up. Had to machine a delrin spacer to space the snubber out. I made the spacer a bit too thick so the snubber is preloaded, the top of the spacer is also made wider to distribute the pushing force evenly onto the chassis.

https://lh4.googleusercontent.com/-D...2/CIMG2996.JPG

Not the prettiest picture ever, but it shows the snubber in there. Together with the extra front diff mount I think it will work. This picture also shows why having spherical bearings in independent camber adjusters is a good idea. You can see one of the camber adjusters on the left, note how the adjusting bolt isn't perpendicular to the mounting bolts.

The next job, building something together out of a big pile of shiny parts that fits in here:

https://lh6.googleusercontent.com/-A...2/CIMG3012.JPG

I feel like a fat kid waiting for his birthday cake. Seriously, we all have blue balls right about now.

Still love it :)

+1

Well put! :icon_tup:

+2! :lol:

i love this build:icon_tup:

The quality of craftsmanship in some of these threads blows my mind. Well done man, amazing dedication!:icon_tup:

I an going to guess that john plans on going with pectel.

Pectel? No way, I'm doing this on a budget remember :nod:
Ah well, I might as well spill the beans, since everyone's so curious about it.

I'm going to use an ignijet 2008 unit made by ignitech, (webpage: IgniTech). It's a programmable ecu specifically made for 4-cil racing motorbikes. Reason I went with that ecu is that I've had great results with their ecu's before. I used to race motorbikes and used their unit for years without any problem whatsoever. I've also installed their ecu's on other people's stuff, always without problem. I've worked with a few other ecu's aswell (megasquirt, adaptronic, dta, kms) but none of them came anywhere close in my opinion.

The ignijet 2008 is an ecu with 4 ignition and 4 injection channels, it can control various servo's (for example drive-by wire throttlebodies, variable intake systems, exhaust flapper valves ect.), and has some nice other features aswell like using a potentiometer for adjusting parameters, using the rpm gauge for showing lambda, programmable ignition cut for sequential gearboxes, gear dependend corrections, control of n2o solenoid, launch control, pit speed control, canbus output for datalogging, external monitor function for monitoring engine parameters during tuning, start limiter ect.

And now for the downside of the ecu, it's not made for a rotary engine, there is no split timing map, so even on a 2-rotor split timing is not possible. (setting a fixed amount of split is possible though). The manufacturer also does not give any rotary related support. I tried buying an ecu for use on a rotary engine and they wouldn't sell one to me. So I actually asked to buy an ecu for a wasted spark v8 to get them to sell one to me. It isn't a big issue for me since I'm not using a turbo, If I end up wanting to run split timing I'll just get a 4-channel ignition box from them, that should let me run 12 spark plugs on a 4-rotor. Their pricing is pretty reasonable too although it went up a lot this year, I think I spended about 650e for everything, ecu, wideband lambda controller with the bosch lsu 4.9 sensor, new ignition coils and pickup sensor, with a basemap configured for the 4-rotor.

Have you tried talking to muythaibxr? His name is Ken Culver, and he's a Megasquirt ECU developer. He may have a good solution for you if you want to run split timing. It's a build-it-yourself ECU, so it should be right up your alley. It's also budget-friendly :)

Love it.

awesome build!

i've built a bunch of cars with everything from the stock ECU to the E6K/X/E11/platinum, and then my P port has a Weber/distributor.

in my experience the split timing doesn't matter much, and in fact on a high output engine you might not want it, it can't crossfire if its not there :).

the thing that does make a huge difference is sequential injection, but you should be able to get close enough to that.

so i dunno, i'd have no problem running that ECU.

Moar

wow! i love it! keep up the great work!

I forgot this was about a car.. Lol

What car?!

I always thought running a motorcycle ecu would be much easier. I have lots of experience tuning my brothers Kawasaki KFX450R with a Dynojet Power Commander. The tuning is so simple as well as the program. I am contemplating building an ITB set up on his Suzuki Samurai and running CBR600RR throttle bodies, ecu, engine wire harness and a power commander to tune it with a wide band. I think you have a great idea about using that ECU and hope you have awesome success, especially since you are going against the grain and using a "non conventional" setup!

How did it go?

Last post was over a month ago... :(

Can't rush perfection, especially when it's only worked on after hours :)