Coil on plug

[toger13]

Hi guys

I am interested in changing my ignition setup to a coil on plug setup

The small denso coils from something like a hayabusa look just the job for the space I have

Would they be suitable for a 1750cc car running 1.5 bar if boost or am I just asking for trouble? I currently run a MSD ford style coil

Cheers
Su

[andyiley]

Surely the bigger issue would be the replacement of the distibutor?

[toger13]

It doesn't run distributor mate it's a wasted spark ztec style at the min

Cheers
Si

[stevesingo]

You will need a 4 channel ign amplifier and the wire the amp triggers up in pairs 1&4, 2&3.

[stevieturbo]

toger13 said:

Hi guys

I am interested in changing my ignition setup to a coil on plug setup

The small denso coils from something like a hayabusa look just the job for the space I have

Would they be suitable for a 1750cc car running 1.5 bar if boost or am I just asking for trouble? I currently run a MSD ford style coil

Cheers
Su

Most COP's are quite powerful, and some companies like AEM resell some with their own stickers on them.
Obviously they come in lots of different shapes and sizes, and some will be simple inductive coils ( ie usually 2 wire ), others will have built in ignitors, usually 3/4 wire.

If 2 wire, then you will need to be sure you have 1 driver per coil. So if the ecu cannot accommodate this directly, you may need to use a 4 channel ignition amp too.

What ecu do you intend using ?


But most such coils, 1.5bar boost shouldnt pose any problems at all.

[toger13]

Hi

Cheers for the replies

I'm running a haltech p1000

Thanks
Si

[stevieturbo]

toger13 said:

Hi

Cheers for the replies

I'm running a haltech p1000

Thanks
Si

It has 4 channels, so should be ok. But if the coils are 2 wire, then you will need an ignition amplifier.

So be easier and neater to use some with internal amps. Usually the ones with internal amps are more powerful anyway

just a case of finding some with the right dimensions to suit.

[fatjon]

I'm running Toyota COPS on my 1.8 turbo MX5 at close to 2 bar without problems. The original Mazda wasted spark coils couldn't cope beyond 1 bar. Of course it may be that they don't fit your engine. Happy to measure one up if it helps.

[poppopbangbang]

Hayabusa coils are very good, we used them as retrofit on our older F1 engines and JUDD use them on their later V10s. No issues at big cylinder pressures and in your application I am sure they'd barely break a sweat.

[Heaveho]

I'm also running a Toyota cop setup on an Evo at 1.85 bar, knowing if the dwell time on your intended setup is the same as what you run now would be useful, and if it isn't, can you adjust it in your ecu?

[toger13]

Ye the ECU is fully adjustable

I can't decide now if I should fabricate a bracket for the hayabusa coils or scrap that idea and run something thing like the LS2 coils as they have built in igniters as these sepetate igniter moduals seam problematic from reading the net

Si

[stevieturbo]

There are plenty of COP's with built in ignitors, it's just finding dimensions might be harder

Bosch and others make amplifiers ( Haltech I'm sure resell some ), so even if the COP's were inductive, there isnt much reason for any problems.

034 sell/resell various stuff, maybe some info there.

http://store.034motorsport.com/products/ignition-s...

[reggid]

Is there often a performance benefit in going to COP compared to wasted spark or even compared to a distributor setup if there are no obvious deficiencies with the ignition system to start with?

[Heaveho]

On turbo cars running high boost, you can enlarge the plug gaps with less risk of blowing the spark out......there's also a lot of talk of smoother running and better starting on the model specific car forum I often frequent, however, I didn't notice any benefit in this regard, mine started well and ran well prior to doing this mod.

Edited to rectify stupidity!

Edited by Heaveho on Sunday 9th March 10:52

[stevieturbo]

reggid said:

Is there often a performance benefit in going to COP compared to wasted spark or even compared to a distributor setup if there are no obvious deficiencies with the ignition system to start with?

Depends how bad the base setup was before changing.

Fully sequential COP potentially offers more dwell time if high rpm's require it. Wasted has limitations there.
And even more so a single coil/dizzy trying to fire X as many times per cycle as opposed to once.

Dizzy's have more wear/tear items whether the dizzy drive, rotor arm, cap etc all of which can be detrimental to performance.