Cdi, Coils And Coil On Plug

[aleks]

I have a 6 channel CDI; M&W Pro 16B and have made up brackets to mount the coils on the intake side of the engine, but I am now re thinking the way I should mount them or to run a coil on plug set up....

Just wonder if anyone has run a coil on plug CDI set up on a RB engine, what CDI coils did you use? Or if you are using CDI how have you mounted the coils?

Might as well mention I could care less if HKS twin power,factory coils, splitfires ... blah blah work fine at XXX hp

Cheers, Alex.

Edited January 18, 2011 by aleks

[Adriano]

Mercury outboard cdi coils, or msd coils can be made to fit under the coil cover.

[T04GTR]

the m and w coils seem to be the go. (modified mercry ones) i personaly use mazda 13b coils.. mounted on a bracket above the loom.

[aleks]

A little bit of indecision because I now fancy the coil on plug idea but I should just stick with what I have got at the moment which are the Mercury CDI coils only problem I can think if I do use them as coil on plug instead of the way I have them mounted in the picture below the wirring from the CDI to the coils will be more than 1 metre...

Edited January 18, 2011 by aleks

[rob82]

No matter how big the spark energy if you fire through the lead your going to get misfires. My preference is still cop xr6t coils as they are high energy for low dwell - 2ms is heaps.

[R32 TT]

Funny you should ask this question today of all days... because I just had my coil-on-plug coils turn up - today! I run Motec CDI and was running an outboard coil with short leads.. It was pretty ugly and as Rob just pointed out, its good to do without the leads. So this is going to be the new config.

These coils are 1.4ohm (0.8ohm available), are specifically suitable for CDI and I ordered them with optional adaptors that screw into them and make them able to fit over standard Spark Plug terminals. I am preferably going to find a spark plug with the removeable terminal so I can screw on these coils directly, but at least both bases are covered.

Mark from WeaponX was very informative and was happy to answer quite a few questions in detail.. hopefully I didn't annoy him too much, but when you find someone who 'will' answer, its good to get all those burning questions asked!

I have been looking for a suitable coil on plug CDI based set up for quite a while (over a 2 years on and off) - getting accurate information on things has been much harder than you would think.

[aleks]

What are those coils worth if you don't mind me asking? Did you just change to clean up the engine bay?

I don't mind too much how it looks but I like the idea of not having to run a lead.

[R32 TT]

What are those coils worth if you don't mind me asking? Did you just change to clean up the engine bay?

I don't mind too much how it looks but I like the idea of not having to run a lead.

About $70US per coil. I will never admit to buying these just to clean up the engine bay.. will never admit it. ever..

ok partly. Lets face it, I had an existing CDI system that was working very well. If there is a performance improvement in these coils over what I had, I doubt 'my' setup would show too much of it. The gains would likely show up on a bigger boost/horsepower car than mine - running methanol, 2bar and so on.

But I expect with less connections, the interesting design they use (see website) that hopefully this is neater and more reliable setup.

http://www.weaponxperformance.com/catalogv137/index.php?main_page=product_info&cPath=37&products_id=111

Edited January 18, 2011 by R32 TT

[DCIEVE]

I have the mercury coils mounted in the stock location with very short leads, looks neat and haven't had a problem with it. You wouldn't know they aren't coil on plug without removing them. I'll dig up a pic.

[T04GTR]

i was looking at up grading. but ive yet to have a missfire with 1.1 plug gap and 30psi.. with my waste spark rx7 coils. bulky and abit messy.

[R32 TT]

i was looking at up grading. but ive yet to have a missfire with 1.1 plug gap and 30psi.. with my waste spark rx7 coils. bulky and abit messy.

Just received a nice bit of CNC'd aluminium to hold the Coils in place. From www.billet.net.au

C'mon Dave. You know you want to...

[aleks]

Thread revival..

On 02/02/2011 at 10:35 PM, R32 TT said:

Just received a nice bit of CNC'd aluminium to hold the Coils in place. From www.billet.net.au

 

How did you go with these coils?

Anyone else tried the Denso CBR cdi coils, I see that billet.net.au are selling M&W kits using the denso coils.

[SiR_RB]

I run that kit making 650kw no issues and I know of afew other big Gtr's pushing over 1000hp with the same kit 

[aleks]

Rubber location as they come from weaponx needs a taller bracket, spacer, and longer fasteners. Makes more sense to reverse the rubbers and move them lower (bottom right coil), going to draw up some brackets in cad,  then print them out.

 

 

Standard Neo coil

[aleks]

 

 

[SiR_RB]

Can't fit coil pack cover on with the weapon x coils as they are much taller then the denso/Honda cbr CDI coils

 

[aleks]

Yeah, I'm not planning on running one plus I am trying to shave off as much weight as I possibly can.

[aleks]

[R32 TT]

Sorry mate, only just saw this today (missed your question back in March!).    Yep - mine worked well.   Had no issues.   WeaponX and Denso's both worked fine.

Recently I did just change over to R35 coils as these had proven to meet the power (beyond the power) I run and it meant I could use less wiring and get rid of the CDI module.  Plus the promise of a longer burning spark to light lean idle mixtures.    In truth no discernible difference between the two though.    I think the CDI would come into its own in really big boost scenarios - but I can't back that up with any real world experience to be honest.

 

 

Edited May 23, 2017 by R32 TT