Coil-On-Plug for Aircooled Engines?
 

Does anyone have experience with, or photos of, coil-on-plug setups for the 911-based aircooled engine?

I know the water-cooled cars use these, I wonder whether they are suitable for use next to the high temperature cylinder heads of a 911. Often times you see direct ignition with coil packs and short wires running to Beru-type connectors.

I have checked the websites of most of the shops and haven't seen anything for sale which is why I am curious.

Herr Professor Von Cramer,

We are working on custom valve covers for these cars to accomodate a C-O-P ignition setup.

We have done some of these using Motec Engine Management that works out just fine but the main issue is securing the ignition modules to the upper & lower valve covers properly.

Dr. Ing. Steve,

I was hoping you would chime in. . . I think our man Peter Dawe has done something like this as well. . . hard to find photos out there.

It looks like the Boxster uses a Beru coil with a separate connector to the plug. I wonder what the distance from seated on the plug to the surface of the cover is. . . could one weld a couple studs to the aluminum cover to hold the coil? Hmmm. . . .

http://forums.pelicanparts.com/uploa...1212786148.jpg

I cannot seem to find a good picture of the 996 valve cover design. Tony (911quest) can you help, I know you tore a boxster engine down.

Hi John,

When Bill and I were disussing my build he mentioned that he had done a few and if I were interested. He knew that I like a very clean uncluttered engine bay.

I said no.:D

I am going to do it, I hate spark plug wires, distributors, advance curves, rotors, condensers and all that crap.

I was planning on just modifying the existing valve covers (drill out the holes, put in studs and go from there), but Dr. Steve's stuff may be interesting.

I also have to plug my distributor hole, I have seen Clewett's solution, don't like it all that much and was wondering if a press in aluminium disc with a couple of small retaining screws, all loctited and/or staked in, would look better and still be dry.

My only reservation is that Motec is expensive, but maybe they will make a stripper version for us street guys....

Dennis

They do make a "cheap" version that is VERY good: M48, but it doesn't have sufficient outputs for C-O-P ignitions. One needs M600 to do this and that one is not cheap.

When it comes to Engine Management, you get just what you pay for,...:)

When I built the latest iteration of my motor a few year ago I was all set to do cop ignition, but my funds dried up... so I put a quick waste fire setup together.
I think the coils were almost $100 ea then.. I couldn't swing $1200 for coils then.

Bill and I were talking the other day, and we are going to do COP on his monsters powerplant... Also Dawe has a few out there running COP

I believe Musante Motorsports and Rudtners are among the few who have attempted this with success. I have only good things to say about both of them, and I personally own a car that was converted to EFI by Bill Rudtner.

I was going through the Jeg's catalog the other the other day, thinking the same thing. Maybe there are U.S. COP that are lower cost? I know the Ford DOHC engines have a pretty deep recess for the spark plugs similar to Porsches.

John - try this site for dimensions of the module - looks like type PT

Ignition coils at Bosch Motorsport

Regards
John

That is a nice dimensioned drawing that I can use to see where the coil would sit on the valve cover-- thanks.

http://www.bosch-motorsport.de/pdf/components/ignition_coils/Single_PT.pdf

sorry to bump an old thread, but I currently have 6 beru coils wired up to a 3.2L motor that I'm trying to get running with Megasquirt. I was curious if anybody has made progress with modifying the valve covers? I was going to make a bracket, but the valve cover idea sounds like a cleaner solution.

Thanks,
-Ed

While the coilover setup is desireable I find the Crane CDI unit to be the best solution when considering cost vs performance.

there are several threads on this. some have used zx7 cops or audi cops effectively on 911 motors using an ems .

I'm using the Audi/VW coil-on-plug. I drove at least 4000 miles this summer, both street and track, with coils from the scrapyard. No problems at al.

COP Valve cover
 

This is a new setup developed by Rothsport in Oregon. You can call Jeff Gamroth for details. 503 885 9626

http://forums.pelicanparts.com/uploa...1257903978.jpg

Seems to me it would be cheaper to just fabricate an adapter ficture for existing valve covers that bolt to the existing fasteners. Billet = BIG BUCKS.

Billet does not need to equal big bucks for something as simple as a valve cover. With the right equipment valve covers can be made pretty inexpensively....

Cheers

I was just over at Pro Technik in Houston and they have a 3.2 based race motor that uses Motech EFI and Toyota Tundra COP. This is a single plug motor running 10.5 :1 compression making 325 RWHP! They just welded a stud to the valve cover and bolted the coil to it. Very clean! Call Sam and he'll share the details.

I don't use any extra fasteners... Haven't fallen of yet.

http://forums.pelicanparts.com/uploa...1243546343.jpg

But the Rothsport solution is beautiful!