Does it matter which coilpack you use from a Ford???

 

no.

Aslong as you get the corresponding coilpack plug.

 

by corresponding do you just mean one with the correct multiplug connection that fits

 

yes as there is a couple of variations.

Obviously some coilpack are better that other, giving better Volts and shorter charging times

 

ahhh. in that case, from what model is the best ones???

 

Think the norm is the Standard mk2 Zetec Engine.

Think there about Ł45-50 from Fords New.

Or you can get the motorsport version

 

What this then??? How much and where from???

Do you know how it is better than the standard???

 

Unsure if there still available from Fords.

Charge time is 2ms i think compared to 4ms of a standard pack.

And i think voltage increase is about 20,000v over a standard pack.

Unsure of price

 

From my experience, the electrical differences between the coilpacks are generally irrelivant
as they all provide superior spark over a dizzi system.

Your biggest problem will be getting a suitable connector and plug leads to fit
or you will have to modify your existing leads.

 

Cheers Fella's

 

As simon Said i think the increase of a standard pack is enough unless you wish to run an aggresive spark and massive plug gaps.

 

Ive just seen a picture of a Zetec Fiesta Coilpack, and it uses the normal Coil leads and not the clip on type...any problems with that???

I guess it would mean you could use the standard BERU leads....

 

Do any of you fella's have a part number or a specific ford model to get one of the coilpacks from???

I'd have to visit a breakers, and wouldn't want to come home with a crap coilpack....

Cheers

 

i have 2 coil packs and sets of leads off zetec engines.

they were working fine.

Ł15 delivered

 

You will want to ensure that the dwel time for the coils is not too long or short.
If too long the coil saturates and will take longer to move back into the linear region. (Lay mans terms: less voltage at the plugs)

Darren

 

not sure what you mean here?? you NEED to saturate the coil to get the maximum energy out of it.. ok you only NEED to JUST saturate it with sufficient on time, but a longer on-time which runs the coil into saturation won't reduce the coil energy. Extended on-time beyond the saturation point will put extra heat into the coil driver (amplifier) and potentially the coil though, with no gain in output energy.

 

Interesting responses....which i knew exactly what you were talking about....

Still unsure though, whether all this means there are any major differences between the coilpacks on modern Fords or not...

If so, i want to get the best one i can....

 

Never said it will reduce energy,
Saturation will produce max energy, not max volatge as the coil take a longer time to move down the hystersis loop.
So the peak voltage is lower even though more power is given.
Richard from omex was telling me how thay had the same problem, they were using 1ms dwel and getting plenty of power from that. Wish i could remeber which coil pak they wer using.
A coil pack from a turbo engine (not limited to ford models) will probally be designed to have more voltage.


Darren

 

Best not to saturate (as close as poss though), there is a linear region which the coils can operate in.
Darren

 

Darren, any more info you can find/recall on this will be very interesting.. I can't see how "fully saturated" can differ from "just saturated" in those terms, as the magnetics are already at the top of the B-H curve by being 'just' in saturation..

 

There is a linear (relativly) portion then there is a non linear portion, then saturation.
If you are within the linear range the most voltage will be produced.

I did some work transformers for my project at uni, been some time so i cannot remember everything, but can remeber that saturation caused some very weird effects.

As i said omex found this out through actual experimentation so i`m not spouting theory here (i was beside them at the detling kit car show).

When saturated more energy will be released just over a much longer time hence the lower peak volatge.

Darren

 

I'm not disputing what you are saying Darren if that's how it seems.. more trying to understand WHY..
Transformers certainly want to operate on the linear portion of the B-H curve, but that's to maximise efficiency more than anything else..
I'd like to understand how the coil output VOLTAGE (I'm assuming we're talking 'aiming voltage' here) is reduced by operating the coil INTO saturation rather than AT saturation.

 

I`m trying to think of a good example, one of wich are fuel injectors.
If you run a low impeadance injector with constant high crurrent instead of the high current opening, lower holding current, it will take longer to close.
As the magnetic field colapses it has more "momentum" stored which need to overcome.

The volatage is rate of change of magnetic flux. When saturated this rate of change is not as fast so the voltage is less.

Darren

 

Regarding saturation time,

Most ignition amplifiers automatically find the saturation point for all operating conditions
by measuring the current drawn and averaging it over a few sparks.
This maintains the most efficient coil charge dwell time all the time.

However, most ecu's that have INTERNAL ignition amps have fixed or variable dwell times
that need mapping or cannot be adjusted to provide the same
job - then coil type can be an issue to worry about.

IMO, External amplifiers are always supperior for this reason and because also
less heat is generated in the ecu and electrical noise is confined within the engine bay.

 

very interesting thread this one!

 

The coil pack we use on our esc wrc is ford part no. 6503280

Don't know the spec i'm sure one of these nice chaps will tell you....

Regards

Ian

 

Sibster that coilpack is off a 1.4 or 1.6 CVH EFI Engine.

Cheers

Ryan

 

As an example to you all..........


I run a CITROEN coil pack on my car from a BX 1.4 litre.

(Found this coil on sale in halfords in a bargain bin for Ł5)

I run 1.0 millimeter plug gaps and peak 36 psi. Had the same set of plugs in the
car for over 1 year without ANY signs of missfires. !!!!

PLUGS: BCP7RES
LEADS: Using original ford/beru leads modified to suit coil pack.

 

are you serious about that plug Simon, or just testing us ? seems a very soft plug for the grief you are giving them?

 

hmmm that is a very hot running plug for a cosworth engine simon

 

I got the part number SLIGHTLY wrong BCPR7ES

Have done many track days and no problems.

Havent had a melt down for over 2 years now (after dynoing the engine properly
for once)

These plugs were fitted and recomended by an EXPERT !! (not me)

I am NO expert on plug types but lower numbers are cooler ??

 

opposite way round on NGK m8

 

in NGK terms, HIGHER numbers are cooler (harder), but '7' is a coolish grade for a normal road car usually, in the 'standard' plug range I've understood '8' to be a minimum for these sort of applications, BCPR8ES often quoted ok for stage1 max...

 

markk, and Richm,

Worried now as I know how critical plug choice is on biggish power engines !!

If they are wrong, a VERY famous tuner has fooked up big time !!!

Will chuck a set of C57's in later till I am sure (hate champion plugs )

 

that would be even worse - i would rather park my car up than EVER put champion spark plugs in , just keep the NGK's in and take it easy, but , if youve used it hard for so long then there cant really be a problem can there

 

just for a small comparison , std road cars that ive worked on in the past just n/a motors gen tend to run in the heat range of 6, so youronly one step up from them, and iirc the car cam out of the factory (well the sierra did) with 8's in

 

markk, Your right. Better safe than sorry.

Will have a word with that "TUNER"

 

Simon..deffo the wrong plug choice ..A 9 in your application (NGK) or a 7 (701) in Motorcraft

Plus your gap is toooooooo big...wasted energy?...no more than 0.75mm surely???

 

ImaRacing 700,

Coil packs allow bigger gaps and better idle/mid range quality running.

Did try smaller gaps - Idle was shit and on boost was a bit hesitant !

Anything is better that a dizzi

 

Shove some 071's in pal, il fire some across tomorrow to be with you Thursday, PM me your address.