lukeytheduke

i need to replace my coil, but noticed msd do standard coil, group a coil or closed loop. Is it worth getting group a coil when dizzy cap rotor arm are still standard?i wanna go closed loop but its 400quid

cossie4i+

iTrader: (15)

Coil is worth getting.

Lot of petrol can be had for £400

Steve

COCHYN

Benefits with both, I stuck with a new rotor arm, dizzy and a Group A coil with motorsport leads. Does the job perfectly

But eventually I want to go towards coilpack after everything else is done really

lukeytheduke

so if u had 400quid would u go closed loop straight away?or just group a coil new arm and cap. Or even just standard coil?new arm and cap?

lukeytheduke

Too true steve, i still need my cam belt done by the way, and as soon as she's running i'l be in touch

R4N SS

iTrader: (6)

I'd get the group a coil rather than standard mate.

lukeytheduke

Group a with new rotor arm and cap. Do the leads deteriate over time too?

ajamesc

Get the group a loom aswell i had that before i went autronics. The group a loom puts battery volts to the coil when i did mine i tested the volts at the coil and it was about 10 11 volts after with the loom fitted it was about 13 14 volts at the coil but you can make one your self as its just a switched rely with a battery feed to the coil but worth doing as every little bit helps the spark!

pee vee

closed loop bit hasnt got anythin to do with the coil

you'd need to make sure you have a lambda sensor and somewhere to put it if you got a closed look set up... which is very good by the way!

lukeytheduke

Did u notice much difference with closed loop matey?

stevieturbo

Closed loop is generally for emissions purposes. I can see little benefit to economy over a well tuned ecu.

In fact, on a well tuned ecu you could run a leaner cruise than one targeting stioch most of the time.

Just make sure it's mapped properly, that will save more money on fuel than anything

tabetha

Here's a thought, sit down, get a pen and a piece of paper and write down everything you want, then add it up cost wise, now rubbing the bump on your head after falling off the chair in shock compare it with a aftermarket ecu that does all this and more.
CL came about to protect catalytic convertors, by keeping the mix within a very close range, at the same time as other things like pulse air to keep rich cold engine mixes burning in the exhaust top heat the cat quicker and protect it, NOT for economy.
IF it is mapped correctly it doesn't need CL, I have the option of clicking the CL button on my laptop when connected to ecu, but find it better NOT on CL.
tabetha

Stu @ M Developments

iTrader: (12)

It was one of the reasons, but far from the only reason.

Why didnt the manufacturers just map it properly instead of fitting lambdas etc then?

lukeytheduke

i think u two need to agree to disagree as u have opposite views on ecu's etc. Stu if i got wasted spark kit, what happens to crank and phase sensor?

Stu @ M Developments

iTrader: (12)

Nothing pal, they are retained as they have nothing to do with the ignition system.

stevieturbo

If we couldnt improve on what restraints the OEM are tied to, then the tuning industry would be dead.

They have to meet their stringent emissions targets on vehicles that may run for 200k+, that may rarely be serviced throughout that time, that may be seriously abused, that may drive from extremes of temperature to extremes of altitude and still have to maintain those emissions targets.

Although even then, sometimes they fail miserably. Closed loop is just one of the tools they have to try and maintain those targets.

I cant imagine there are too many users here overly concerned with most of the above. And targetting stioch may be the cleanest burn, which is what they try to achieve, but it isnt always the most fuel efficient etc.

Stu @ M Developments

iTrader: (12)

Whilst what your saying is of course correct, it is for those same reasons also the very best way to ensure that felling is correct throughout not only a multitude of scenarios, but also to give the ECU the ability to compensate for fuel tables that are somewhat too small and of course compensate in real time for the dynamic that is "engine wear"

Whilst the users on here likely don't care about the metric you expressed, and I would agree with you there, they do however modify their vehicles to the extent that the available fuel table in the OE ECU they own does not always have sufficient resolution to keep fueling perfect at all times without closed loop strategies helping them along.

I explained the reasons why in significantly more detail here so wont go on to write another thousand words on this topic, since its not really about closed loop anyway.

lukeytheduke

Did u get my email regarding a group buy?