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-   -   COP for high boost (15psi+) (https://www.miataturbo.net/diy-turbo-discussion-14/cop-high-boost-15psi-58462/)

lloydie 06-15-2011 10:46 AM

COP for high boost (15psi+)
 
Searched and searched but nothing concrete. Ive just blown my fourth AEM TwinFire box so enough is enough. Going to ditch the 300M coils and run Toyota COP's with integral ignitors. But what i havent found is anyone running toyota COP's in 300bhp+ cars. Just want clarification that they are out there and work OK. I can vary the dwell and everything with my Motec so should have no issue running them.
Thanks in advance

Braineack 06-15-2011 10:47 AM

it's what many are using. There are other offerings from DIYautotune and Flyin Miata.

Der_Idiot 06-15-2011 11:06 AM

Depending on your ECU you might have to go sequential. COPs are an easy setup though, honestly. Running 14psi and .04 gap with NGK resistorless.

leatherface24 06-15-2011 12:19 PM

I know I was making well over 350rwhp at one point and I was still on the stock MSM coils. The difference was the iridium NGK plugs I was using. I had blow out at 15 psi with the standard BKRE7F's gaped all the way down to 20. After switching to the iridiums, I was able to run 30 psi with a 30 gap with zero issue. Try those first before anything else. Its cheaper for now if they work for you

lloydie 06-15-2011 12:36 PM

Ok, good feedback thanks. Im already running the NGK irridiums due to a misfire at 290bhp that wouldn't go away. Switching to irridiums gave me instant 6bhp, then we got another 5 bhp from fine tuning. Now im fitting a smaller turbo but running more boost, and i want a more reliable solution. Every time the AEM box goes down the car is dead. At least if i run seperate coils with seperate ignitors and i lose one, i stand a fighting chance of limping it home on three cylinders !

leatherface24 06-15-2011 12:43 PM

Ah yeah that sounds like horseshit to deal with. COPS man. Theyll work.

GrahamC 06-15-2011 12:50 PM

I'm getting blow out occasionally under high load (on the track) on BRK7E's.

Do you know the model number you were running leatherface??

Preluding 06-15-2011 01:17 PM

This is interesting to me as well....I'm running toyota cops with AEM (still batch fired)
Would running sequential prevent spark blow out.

I think its blowing out now at about 16psi...

fooger03 06-15-2011 01:35 PM

only if they're misfiring due to not enough time to produce full dwell at high RPM - unless my math is off *which it very well could be* there is approximately 7.5 milliseconds per rotation at 8k rpm. This means your coil is firing once every 7.5 milliseconds in batch fire, or once every 15 milliseconds in sequential. The Toyota COPS run a dwell of around 2.5 milliseconds, which I think means that they charge for 2.5 milliseconds before firing - this would mean that in batch fire, you should still be able to fire the coils three times as often as you would at 8k rpm and still get a full spark

My basic understanding of how this all works might be wrong though.

Preluding 06-15-2011 01:38 PM

Quote:

Originally Posted by fooger03 (Post 737783)
only if they're misfiring due to not enough time to produce full dwell at high RPM

Thanks... I'm using the dwell settings Savington posted up a while back..I'll look into them..

leatherface24 06-15-2011 01:56 PM

Quote:

Originally Posted by GrahamC (Post 737758)
I'm getting blow out occasionally under high load (on the track) on BRK7E's.

Do you know the model number you were running leatherface??

Ill check my binder at home later tonight and ill let you know Graham

lordrigamus 06-15-2011 02:16 PM

I'm running COPs at 20 psi. with a .022 gap at an AFR of 11.5. No blowout. I'm still retuning after my rebuild but I think I should be able to run slightly more gap without pulling fuel. Just haven tried yet because I'm doing my coolant reroute at the moment. Also running BRK7Es.

Just some food for thought.

Preluding 06-15-2011 02:57 PM

Quote:

Originally Posted by lordrigamus (Post 737799)
I'm running COPs at 20 psi. with a .022 gap at an AFR of 11.5. No blowout. I'm still retuning after my rebuild but I think I should be able to run slightly more gap without pulling fuel. Just haven tried yet because I'm doing my coolant reroute at the moment. Also running BRK7Es.

Just some food for thought.

Good to know...when I pull fuel the "blow out" seems to go away.
I'll go back and check my dwell settings...this doesn't make sense.

lordrigamus 06-15-2011 04:37 PM

Quote:

Originally Posted by Preluding (Post 737832)
Good to know...when I pull fuel the "blow out" seems to go away.
I'll go back and check my dwell settings...this doesn't make sense.

Yeah, mine too. After my last experience with detonation, I fattened it up just for safety's sake. A little too lean with too much timing didn't end well.

When I was running 14psi, I had selected the wrong O2 selected accidentally in Tuner Studios and was actually running about a 10.5:1 AFR . I had blowout on a .025 gap with that much fuel also. So it is all relative. I have yet to try more than .022 at 20 psi with an 11.5:1 AFR. Maybe tomorrow if my pipe for the reroute shows up.

Preluding 06-15-2011 04:51 PM

I'm gapped at .022 right now and the car hesitation/blow out goes away if I lean the fuel to almost 13.5-14.0 (thats the reading on the gauge itself & ECU)

Faeflora 06-15-2011 04:52 PM

I have two sets of 01+ semi COPs for sale.

Ben 06-15-2011 05:19 PM

http://www.diyautotune.com/catalog/i...oil-p-394.html

^^As used on the ~17 psi DIYAutoTune.com Miata, 1000 hp 40 psi 4 cylinder Huber Mustang, and lots of other high boost, high power cars (alcohol dragsters and the like). We replaced a brand new Accel coil on a distributor ignition Porsche with an IGN-1A a couple weeks ago. It drew about 50% more current and the car picked up 15 whp.

We recommend custom, factory made plug wires with these coils. Magnecore will set you up for around $80. We do not recommend self made plug wires from kits.

TurboTim 06-15-2011 05:26 PM

What's bad about DIY wire kits?

falcon 06-15-2011 07:32 PM

I vote LS1/LS2 coils. I'm running them with success at 14PSI. Not a single misfire ever, idle is ridiculously smooth.

falcon 06-15-2011 07:33 PM

1 Attachment(s)
Quote:

Originally Posted by Ben (Post 737887)
http://www.diyautotune.com/catalog/i...oil-p-394.html

^^As used on the ~17 psi DIYAutoTune.com Miata, 1000 hp 40 psi 4 cylinder Huber Mustang, and lots of other high boost, high power cars (alcohol dragsters and the like). We replaced a brand new Accel coil on a distributor ignition Porsche with an IGN-1A a couple weeks ago. It drew about 50% more current and the car picked up 15 whp.

We recommend custom, factory made plug wires with these coils. Magnecore will set you up for around $80. We do not recommend self made plug wires from kits.

I made my own wires, and from my experiences with Magnacore/MSD wires... my crimps are better than OTS kits I've had for other cars in the past.

Attachment 188215


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