A race bmw 316, m10, s14, m20, turbo, na, its been the lot!

[Graham]

Re: A race bmw 316, m10, s14, m20, turbo, na, its been the lot!

although ive done nothing to the car for months i have spent some money, with the OE loom gone and thus factory instrument cluster now useless in most respects i picked up a nos stack dash cheaply, by cheap i meant relatively cheap for a stack, it wasn't actually cheap at all



it came with pressure transducers for oil and fuel, fortunately they fitted in place of the old plastic oil pressure pipe which i never liked and in place of a blanking plug in the fuel pressure reg.







i wasnt so lucky with the coolant temp sender, but got round that by drilling and tapping an 1/8 npt thread in a corsa sump plug which fitted in place of the oe bmw gauge sender. i havnt worked out what im going to do with the oil temp sender yet, theres not enough material for me to fit t to the sump plug

[rallyrob]

Re: A race bmw 316, m10, s14, m20, turbo, na, its been the lot!

Has it got an alley sump? I had my oil temp sender in the side of my RS sump, with a plate tigged to it to thicken it up then tapped into that.

[Matt75]

Re: A race bmw 316, m10, s14, m20, turbo, na, its been the lot!

Graham, I fitted my Stack dash fittings to the oil cooler sandwich plate if you are running one

Cheers

Matt

[Graham]

Re: A race bmw 316, m10, s14, m20, turbo, na, its been the lot!

cheers, the sump is alloy but its a hell of a lot of work to remove it just to weld something to it, it has got a cooler sandwich plate, but its the factory bmw one wish i dont think suitable for drilling, we will see,its not a priority

[rallyrob]

Re: A race bmw 316, m10, s14, m20, turbo, na, its been the lot!

Has it got access to the main oil gallery in the side of the block, if so could you not use an adaptor of some description an put it in there somehow?

[alladdin]

Re: A race bmw 316, m10, s14, m20, turbo, na, its been the lot!

im rather surprised no one has asked weather OMP do bibs

[Graham]

Re: A race bmw 316, m10, s14, m20, turbo, na, its been the lot!

ive sorted fitting the oil temp sensor, i turned up an adapter so it can fit in the sump in place of the redundant oil level sensor.





ive also made enough headway with the new loom that today i realized i only needed make another couple of connections and i would probably be able to start the engine (i left the engine management loom largely intact) it fired up easily



nice to see the dash works, its new but old and i bought it off ebay some time ago, so no comeback if it didnt work. it wil definatly be handy to have a fuel pressure reading and actually be able to be warned of oil pressure/temp issues via an automatic alarm, the car did have an oil temp gauge, but where it was located you'd of never been looking at it during a race, well not unless you wanted to crash!

unfortunately within minutes of running, its clear i still have a missfire issue, this time though it was a low rpm????. Having rewired and replaced practically everything im certain its not a wiring issue.

playing with the wiring with the engine running im now pretty sure its interference between the HT leads and the crank senor wiring, why i dont know, especially given, it not changed from when the previous owner raced it, or i took it to brands. im going to get two sets of 4cylinder leads to try and make up a short set of 6 cyl leads as the current leads are very long, im also going to re route the crank senor wiring, if that doesnt work it might be time ofr a box of matches!

[alladdin]

Re: A race bmw 316, m10, s14, m20, turbo, na, its been the lot!

is the crank sensor wiring sheilded ? (should be) and if so only one end of sheild is earthed.

sorry if granny sucking eggs comes to mind

[Graham]

Re: A race bmw 316, m10, s14, m20, turbo, na, its been the lot!

is the crank sensor wiring sheilded ? (should be)

i didnt do the injection loom, but it wasnt, although used to run just fine like it, ive since shielded it, then fitted new wire, new connectors both ends etc etc etc, so far nothing has worked............

[Graham]

Re: A race bmw 316, m10, s14, m20, turbo, na, its been the lot!

got bored with wires, im on brakes now, ive started re engineering the front brakes, not to gain performance as they work well, but to gain clearance for wheels, i have 4 different sets of wheels for the car, but only one set will fit the front. the big disc conversion (peugoet 406 coupe) uses a very flat disc with next to no offset so it pushes the caliper out a long way.

i bought some universal bells and willwood discs from rally design, the discs are almost the same size, but with the bell i can save a bit of weight and move the caliper to gain some clearance for the wheels.





i had to bore the centre hole and add the stud holes and slim down the bell, it all mounted up quite well a check with a DTI showed i had 0.005 run out on the disc, that was probably ok, but i had another go at anyway, chucking up the bell in the lathe i trued it up in the chuck on a virgin surface ( well one that i had not already machined) i skimmed the face which goes against the hub, and took a lick off the disc mounting face, refitted to the car the run-out had dropped to 0.0015 at the outer edge of just over 300mm dia the discs, i can live with that

[jcccruz]

Re: A race bmw 316, m10, s14, m20, turbo, na, its been the lot!

Graham the original spark plug cables of the E30 have a resistence of 6k ohm maybe that is interfering with the ECU at high rpm. I did have the opposite problem in my BMW E21 when I swapped the original spark cables for one custom made just to find out it didn’t work without the resistors.

[rallyrob]

Re: A race bmw 316, m10, s14, m20, turbo, na, its been the lot!

What grade bolts have you used round those discs and bells please, 8.8 or 10.9's? Look like copper locking nuts, like manifold nuts too?

[Graham]

Re: A race bmw 316, m10, s14, m20, turbo, na, its been the lot!

Graham the original spark plug cables of the E30 have a resistence of 6k ohm maybe that is interfering with the ECU at high rpm. I did have the opposite problem in my BMW E21 when I swapped the original spark cables for one custom made just to find out it didn’t work without the resistors.

ive now changed leads, but it used to work on the old ones so why the sudden change?

[Graham]

Re: A race bmw 316, m10, s14, m20, turbo, na, its been the lot!

What grade bolts have you used round those discs and bells please, 8.8 or 10.9's? Look like copper locking nuts, like manifold nuts too?

not sure, but 8.8s but would be good enough, yes they are manifold nuts, i wanted a lock nut but given teh disc glow red under race conditions i didnt think nyloc was a good idea

[rallyrob]

Re: A race bmw 316, m10, s14, m20, turbo, na, its been the lot!

not sure, but 8.8s but would be good enough, yes they are manifold nuts, i wanted a lock nut but given teh disc glow red under race conditions i didnt think nyloc was a good idea

Ok thanks, yea I get what you mean about the manifold nuts.