COP vs CNP

[chimpvalet]

Hello,

Adding an aftermarket fuel/spark ECU to a distributor equipped 4 banger with intent to go sequential direct-fire ignition, deleting the dizzy. How do COP igniters compare for reliability versus CNP? It's a normally aspirated street engine so either set-up will spark it sufficiently.

Thanks
Steve

[BOOT]

Where are the plugs located in relation to the exhaust?

[chimpvalet]

This is a Lotus 900 series engine, 45 deg slant four, DOHC with plugs between cam carriers.

[Orr89rocz]

Well cnp lsx stuff is very reliable. Hundreds of thousands of miles and going lol and they work well for alot of high performance stuff

[Cubic_Cleveland]

I would go CNP with LS coils as well. More freedom/easier to mount, plus availability that’s hard to beat most anywhere in the world.

[digger]

seems better to have CNP if you have the space, they probably get less heat and vibration which is probably a good thing.

[Belgian1979]

CNP works fine. Pretty much indestructable.

[Protech Racing]

I'm moving away from the LS coils. Big, heavy and use a lot of juice for NA engines. The VW 4 post coil works fine. makes the same power and uses less juice. I have both tho .

[chimpvalet]

Thanks, gents. I agree on the CNP type likely being better in regard to vibration and heat issues. Does that VW 4 post coil pack work full sequential or is it wasted spark only?

[Protech Racing]

Waste . No power change or running change. So far, I have not seen a reason to go sequential for fuel or ignition.
The 907 wont care. IMHO. anything is an improvement over the OE.

[Belgian1979]

Actually I've seen a difference between sequential and non-sequential and especially in terms of smooth running.

[chimpvalet]

That VW coil pack looks interesting, any info on wiring it up?

[Protech Racing]

I run mine from the Microsquirt .

http://www.msextra.com/doc/pdf/html/Mic ... e-3.4.html