LS2 coils are in and running!

[FirstFives Dictator]

As part of the new revision MS2 Sequencer testing (see The Monkey's excellent writeup) I've installed LS2 coils on the e12. They are monsters!

Yesterday we achieved full sequential operation.


Will post pics later today; if you are on Facebook, just look for PFTuning.com

[George]

noice

[cvillebimmer]

[Coldswede]

So you mean you have a smooth idle now? Oh wait you have a "Cam" in there don't you.

[George]

So you mean you have a smooth idle now? Oh wait you have a "Cam" in there don't you.

I think Peter's e12 is pretty close to stock on the motor.

[Duke]

They are monsters!

How are they different than any other coils?

[FirstFives Dictator]

They are monsters!

How are they different than any other coils?

I believe there is around 40ma of current, same as LS1 but probably a lot more than stock BMW ignition system.

LS2 Truck coils are much higher but I don't need that amount of current.

Opened up the plug gaps to .035" and never looked back.

Cam is very stock b34 cam. Car runs much smother with sequential fuel.

[Shadow]

Are these better then the big 3 chevy coil packs that everyone uses?

[Jeremy]

Did the idle improve as well, Peter? How did you get cam timing? Checking your Facebook page now ...

[FirstFives Dictator]

Did the idle improve as well, Peter? How did you get cam timing? Checking your Facebook page now ...

I used distributor (I'll do something different with Jeff's)
Idle is better and I can idle at stoich and it's pretty smooth

With the old log runner setup, I probably have a bunch of tiny vacuum leaks, so this is even more impressive. Plus motor must have 300k on it by now.

I'm not sure if these are hotter than wasted spark GM coils but I had no choice. MS2 Sequencer only supports individual spark and fuel outputs (it can run then wasted if you don't get cam sync)

[winfred]

what are you running for exhaust at the head? manifolds or headers? i remember your autocross videos where it was very raspy like my shark, i just went from b35 manifolds and head pipes to stahl headers and the difference is unbelievable (i think in raw flow the b35 manifolds may be bigger) the rest of the exhaust is unchanged went from 2" e34 head pipes chopped just forward of the converter behind the o2 sensor where it splits back into 2 pipes, from there into a magnaflow crossover muffler and then into a e24/28 stainless muffler of some kind (once thought to be a stebro but unsure now) with the headers the rasp is completely gone and it even sounds better at idle, on the interstate its more quiet at pretty much any speed, with the manifold system it had a zone around 75 mph where it would loose a few DB and then it would come back up to the normal sound level at a higher speed (like it had found its resonance)

to cut this long winded prattle to the point i suspect the rasp was the out of tune system fighting with itself, i don't smell unburnt fuel in the exhaust or get pop and burble on deceleration (if you cracked the throttle to get the injectors back on it would fart and pop) anymore. it may of lost a touch below 2k if anything but pulls like a mother all of the way to 6500. something to think of if your rasp is like mine

couple shots of the system pre headers
i chopped the head pipes just forward of the stock e34 merge and connected there, smallest pipe in the old system is 2" od the collectors on the headers are 1.75" od

[FirstFives Dictator]

Just euro e12 manifolds and Bav downpipes.

I have a header to go on at some point but probably not on this 300K engine

Agreed, my exhaust is not well engineered. It is a little lighter than stock though

[SamSpade]

What's dwell time did you find best for the .035" plug gaps?

[FirstFives Dictator]

What's dwell time did you find best for the .035" plug gaps?

Just run the standard dwell of 5.0-5.5 msec