coil packs
 

My workshop mechanic told me the reason for my coil packs and crank sensor failed to work and had to be replaced was that i drive it not often enough. Is this true?

wtfs a crack sencor?

dozer, don't be so critical. You knew what he meant.

gys wessels, I am on here alot. I haven't heard of coil packs or sensors going bad due to lack of use. The coil packs were not the most robust when the car first came out. There has been 3 revisions of these. I don't know what sensor he is referring to, but it must have been one of those things that go bad on a car.
The Firefox browser has a spelling checker built in and will help eliminate the critics that are looking for minutia to complain about.

thanks for your help, sorry for the spelling

thanks for the help, sorry for the spelling

Whats wrong with your car exactly?

Replace your coils with the BHR set, that will solve any coil problems.

coil packs and crank sensor was replaced with original parts from Mazda, running very good now

2004 Mazda Rx 8 , silver , about 1384.00 dollers

Never had a problem with the crank sensor but the coils are like 200 and can be easily done by your self.

He is talking about the eccentric shaft position sensor (in rotary talk). Basically a crank angle sensor. It is located next to the main pulley and can be seen from the bottom of the engine bay with the driver side wheel removed. It is simply bolted on with a harness attached to it. The sensor alone should be less than $150 to replace.

Seriously the Mazda coils suck. Mine wore out in less that 30k. Your engine will thank you. How many miles are on your car? Coils shouldn't fail because your don't drive the car enough. Not saying you didn't need new coils, just saying its a poor excuse from the mechanic.

my car is on 91200km = 57000 miles, I also thought it to be a lame excuse from the mechanic. Crank angle sensor must be the sensor he replaced, thanks for the right terms, this is my first rotary so I am learning all the way! Must say it will not be the last!

Ls2 coils or BHR's Yukon coil will last much longer than the stock coils. Good luck.

My DIY D585 coils. Went with simple bracket that provides better cooling. Not shown are the MSD plug wires. Total cost about $375 with new plugs. Two hour build, but I designed bracket on the fly.

https://www.rx8club.com/album.php?albumid=3965

"Better cooling" than what?

Better cooling than the back of coils mounted directly on a solid metal plate bolted to the motor with very limited air flow. Heat is not good for electronics. It appears all the good coil upgrades have heatsink (MSD and D585.) Just sayin'. Probably does not effect this application, but has to be better than factory.

you do know that the "solid metal plate bolted to the motor" acts as a heat transfer interface right? Correct, heat is not good for electronics, but you successfully removed any thermal transfer properties so now the hotzone of your coils are on the coils themselves rather than being transferred to a larger surface area.

What is the temperature differential between the area of the average RX-8 where the OEM coils are mounted and the average D-585 coil during operation?

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That's the truth truth

Hahaha CRH - 1
Kid zoom - 0

He probably thought that by making his bracket the way he made them, the coils will run 100% cooler.

It's like Im standing right by a live volcano, if I take my shirts and pants off I should feel cooler, right? :lol:

Great question. I really did not mean to create a conversation around "cooler". I will check the temp of the coils on my Yukon and then check the temp on coils on the RX8. That is the best I can do. If any of you all have better access to a more scientific study. Please jump in.

If you have nothing productive to add to this conversation, "Get a life."

Who says that KidZoom doesn't have a better way? There's always room for improvement - or in this a maybe cooler running car, longer lasting equipment. This, of course, is coming from someone who hasn't taken the time to do the RnD like Charles did though :)

If you had access to a Dyno, you could test run your car multiple times and measure the mean temp of 2 sets of runs with an IR gun. 1 without, 1 with, 1 without and 1 with.

I mean really - Whose to say that dumping water in your gas tank doesn't get you 0-100 in 4 seconds without trying? I sure as hell wouldn't try it.

Although most people would scoff at this extreme measures, it's how improvements are made. It's people asking questions which people think don't need to be re-asked and re-evaluated.

ask yourself a question ... why do microprocessors, amps, voltage regulators, and cpu's have heatsinks ? ....

The thing with asking questions is that there is an answer, but that answer in most cases is not the solution, however, that answer can be applied towards reaching a solution, or, confirming that your hypothesis was not correct.

Take a look at the markings on the bottoms of the stock first revision coils on the S1, you will probably notice markings on the bottoms due to thermal conductance and a loss of efficiency from when the coils fire. What CRH/BHR has done with his coils, is use high efficiency coils, as well as couple the coils on a thicker, more efficient thermal interface material (the bracket), thus spreading the heat away from the concentrated hot zone.

I agree that you can't knock the guy for trying, but blindly doing something without understanding the science behind it is as stupid as ... like you said ... pouring water in a gas tank assuming it will help performance.

If one wishes to discuss testing the heat limits of electronics and their viability, I would say 3 years in AZ and 900+ kits sold and shipped to date is about as much data as is practicable. Plus, our new version of the coil we use is being universally praised in our customer satisfaction surveys. My point is that we have already verified the effectiveness of this concept, durability tested the products in question, and have developed one of the most popular products for the RX-8 as a result. Even the idea of a DIY version has been explored and those whom have made that effort have posted their opinions.