which spark plugs?

[blingsta]

Guys, can anyone tell me what plugs to use for a 325i turbo? would it still be normal plugs for a 325i?

[e30_Turbo]

You can go colder by a few degree's but there is no evidence so far that it helps. Stock have been fine for me even tho I did run colder for a few months with no ill effects.

Borrowed from e30tech:

Q: What plugs should i use? what should i gap them to?
A: NGK 3923 BPR8ES plugs. Their 3 degrees colder than stock. i gap them to .025". For 1.0 bar or more boost, even colder plugs are recommended (BPR7ES).

[Turbo-Brown]

Awwwww, look at the puny gap they run

[e30_Turbo]

Awwwww, look at the puny gap they run

I know, I'm so looking forward to 0.9!!

I've set mine at .5 for now, maygo back to .2 if everything else checks out. ( I'm going through everything again to trace this bastard earth issue )

Mark.

[carpmart]

I have always found plug gaps to be sensitive on turbo cars and run 0.5 mm on my pinto turbo with no problems. I actually need a heat range in between what is available as the cold plugs foul easily and the warmer ones are not quite right! oh well, the challenges we face!

[blingsta]

i know their expensive, but hows about iridiums ?

[Demlotcrew]

I use iridium plugs and i think they are great! But i dont have a turbo car.

Andrew

[Turbo-Brown]

Nuts to that, more coils is what you need

[blingsta]

Yeah so ive heard, but apparently you lose the rev counter !?

[Turbo-Brown]

Shouldn't do!

The ECU tells the rev counter to work and seperately tells the coils to do their thing

Mine certainly works with three coils generating juicy fat sparks

[blingsta]

Oh. !! i was told that it doesnt work... are you using m/s too? im gonna have to check again with Ant

[Turbo-Brown]

Nay lad, I'm on Emerald. Seems odd that you'd lose the tacho output just because you've added a couple of extra ignition drivers, but then I don't know anything about MS so mabey you do

[Demlotcrew]

You need to keep the motronic in the car to run the tacho if you go MS.

Andrew

[blingsta]

You need to keep the motronic in the car to run the tacho if you go MS.

Andrew

yep, the old motronic is still there !! only to control rev counter, dont think theres any way round this.. yet!!

[gcorky]

think the tach signal is fettled for ms ?


You'll be able to keep everything except the fuel economy gauge. Megasquirt has a tach output pin, which sends a signal that you can directly connect to the ALL BLACK wire that goes to the gauge cluster, it is PIN 6 on the motronic connector. I have the JS1 on the v3 board go to it, and it works perfectly.

[blingsta]

think the tach signal is fettled for ms ?

what does that mean mate?

[Turbo-Brown]

It's just a square wave 5v signal as far as I'm aware.

I can't believe that MS doesn't have an output for a tacho and the 5v thing seems to be pretty standard, either that or the back EMF off the coil that Pug and VW used to use which you need a signal convertor to get from 5v to 300v, but the BMW doesn't need that

[e30_Turbo]

You need to keep the motronic in the car to run the tacho if you go MS.

Andrew

Utter bollox.

MS has a tach output feature, I have it enabled myself, as does Ant, Blingsta, Mattg etc.....

What we don't have is a way to convert MS output to the correct voltage to run the tacho. Alex has cracked it on emerald so now it's MS's turn.
Ant also mentioned that for some reason the swap over to wasted kills the moronic tacho feed anyway, so tach output or nothing!

Some yanks have it working and I'm gonna go see what is what when I have some revs to use
HTH, Mark.

[blingsta]

Im awaiting your findings Marks... bottle of bubbly if you can crack it mate..

[Toby_Unna]

You need to keep the motronic in the car to run the tacho if you go MS.

Andrew

well there's no motronic anywhere in my car and the tacho works fine thanks

[Turbo-Brown]

Pretty sure that the 5v SQ wave signal is just about the most common tacho input there is and as that's what my ECU puts out, and as my tacho works just fine, I reckon that's what the tacho's expecting.

Take it you don't get a tacho tell-tale with the MS?

Mine tells you how naughty you've been if you leave the key in the accessory position by moving the tacho needle to whatever your max revs have been

[Toby_Unna]

no, but i've seen Andy's Emerald 335 touring do so, very cool

back on topic slightly, i have standard bosch plugs in mine and they're gapped to whatever they were when i bought them 2 years ago

seems happy enough at 7psi anyway.