Coils

[RobinPZ72]

Has anyone tried motorbike coils not hairdryer's (wee bikes), but superbikes spec?

I'm just asking as these are designed for high revs and harsh environments unlike coils that are made for low rpm applications!!

P.s. I understand this might get mocked, but I'll live!!

Robin

[13Black]

I'm not aware of anyone trying. Fancy being a Guinea pig?

[RobinPZ72]

Would be rude not too, however I'll wait till I get a car that I can kill without being sad!

[13Black]

Have you considered a Juke?

[RobinPZ72]

Was thinking I could maybe get a set of the Ducati Moto GP road spec bike or the R1 crossplain as they've got variable firing!

Robin

Electronics is not a strong point even though I've got a bit of paper saying different, so I'd avoid this area as much as possible!

[PeteH]

Good idea (I was thinking the same..). The thing that put me off is that most bike coils are on-plug designs, I think, and with the RX-8's horizontal plugs I'd expect the weight of the coil would snap them off. Happy to be proved wrong though.

[RobinPZ72]

Yeah I was thinking they might get snapped by knocking against local parts, but if not you could make a block to contain the coils and would just click into place!

[350matt]

interesting idea as we use the honda CBR coil a bit at work on all sorts of things as its proven to be very versatile

and its possible to modify a coil on plug coil to have a remote lead , you end up machining bits of PEEK to support the lead end and glue ti all together

[RobinPZ72]

A that's why if I have a drawing we could simulate its position before making a proto type!!!

Anyhoo it could work!

[warpc0il]

I looked into this in some detail a couple of years ago.

The problem is trying to find the technical specs for any of the oem m/c coils. I did manage to find the specs for some aftermarket upgrade coils for Triumph but those coils were nearly twice the price of D585, while still not offering any theoretical benefits.

Without the specs there's a good chance of either cooking the coils or running them at less than half-charge.

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[RobinPZ72]

I was thinking that, but somehow there spec should be available? Could be a dead end like you say!

[RobinPZ72]

Yamaha R1

Specifications

Primary resistance: 1.2 ohms
Primary inductance: 2.4 mH
Secondary resistance: 12.5K ohms
Secondary inductance: 12.9 H
Test voltage: 13.5V
Dwell time to achieve test current: 1.3ms=5.2A, 2.1ms=7.6A
Secondary available voltage: 25.2Kv @ 5.2A, 42.8Kv @ 7.6A
Secondary peak gap current: 72.4mA @ 5.2A, 105.8mA @ 7.6A
Spark duration: 0.910@ 5.2A, 1.435ms @ 7.6A

[13Black]

Spark duration is a little down on what is currently available... how relevant that is in the grand scheme of things I don't know.

[RobinPZ72]

Possibly a pissing in the wind moment idea, but maybe others out there!

[350matt]

be interesting to see how Carl's latest big boy coils perform

[13Black]

PHIL B8 TO THE OSCILLOMELON

[RobinPZ72]

I've noticed most that compete use the std C rev units, which is surprising!! Has anyone had genuine C Spec fail?

[Ryan Rotary Performance]

I've noticed most that compete use the std C rev units, which is surprising!! Has anyone had genuine C Spec fail?

Yes, I've seen plenty fail which is why we have invested £1000's on a bespoke coil for the Rx8 not only providing more ignition power but OEM fitment as well as a lifetime warranty

_MG_0111.JPG

[Dazza44]

Carl would you say u have seen many rev c coils fail, before the recommended change out at about 25k

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[RobinPZ72]

I see lots of very exciting hands waiting for them too! It's not a easy step you've taken either and might be able to get my hands on a set at some point!

Robin

[AndyBrad]

id be happy to swap my 585-r plus leads for a set of the ryan ones to try out?

[dac69er]

Carl would you say u have seen many rev c coils fail, before the recommended change out at about 25k

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i would like to know the condition of the plugs and leads and general installation throughout the usage of the revc coils that have failed.

lots of people only change them when there is a problem as its not instantly noticeable during normal driving. i would put money on rev c coils lasting as long as the engine IF the rest of the ignition componesnt are kept in good condition and no water ingress is experienced.

[TheManc]

when i first bought an RX8 i got new leads,plugs and coils from MRP they were rev C versions after less than 15k one or more had failed . I opted for a used set of585 initially from RR and those outlasted both my cars and are still running on someone else's

[RobinPZ72]

I honestly think I've got original and at best Rev B as I don't think Rev C was out when I got mine dam it's 9yrs ago!!!! I know I've probably jinks myself now but hey sh*t happens.

47k miles

Robin

https://www.lsxmag.com/tech-stories/ign ... -upgrades/

[RobinPZ72]

Check these bad boys out! Took these off a car that wasn't running well! But but there new I was told!

Nothing on them at all not even an attempt of a stamp.