Reading plugs when running Ethanol
05-17-2017, 11:34 AM
#21
Stevie is in the UK I believe. They make an 8 resisted plug there, but it isn’t available in the US (that I can find anyway) and is expensive to import. They also make resisted iridium plugs, but the cost is up on those. Not something I’d tune with. When dialing in a motor you can go through 10 plugs in one cylinder easy, so the cheaper the better IMO. After it’s dialed in an iridium would be fine.
05-17-2017, 01:18 PM
#25
What are the off the shelf resistor plug wire sets people are using for a standard 8 plug (non resistor)? I run low resistance MSD wires with BR7s but want to go to the 8 when I turn it up. Might be easier to swap wires since I am now hearing the plugs dont exist in the US. Seems like we should be able to find them somewhere online.
05-17-2017, 06:39 PM
#33
I'll check around for those resistor ends, but would need another wire set to do so
I'll try a set of plugs for sure, possibly even two sets to get me through this season. I have lost control issue figured out now and this next race will be moderate, but will be looking to turn it up for sure
I'll try a set of plugs for sure, possibly even two sets to get me through this season. I have lost control issue figured out now and this next race will be moderate, but will be looking to turn it up for sure
05-17-2017, 07:04 PM
#34
9 Second Club
Even BKR8EIX's arent that expensive or Denso IK24's etc, although if you're throwing them away after every run, then yes that would be wasteful.
Although they arent a short nose. The Denso's usually have a slightly more chunkier/stronger looking electrode than the NGK's
A quick google of them has a seller in the US with them at around $6 per plug. Again maybe pricey if you're throwing them away or don't like iridiums
https://www.densoproducts.com/product.aspx?zpid=11180
Other than proper racing plugs that are ******* expensive, the BCR8ES is the only very common short nose plug you lot might be interested in that I'm aware of.
There are loads of sellers so I'm sure somewhere would be able to do a bulk order easily enough.
Although they arent a short nose. The Denso's usually have a slightly more chunkier/stronger looking electrode than the NGK's
A quick google of them has a seller in the US with them at around $6 per plug. Again maybe pricey if you're throwing them away or don't like iridiums
https://www.densoproducts.com/product.aspx?zpid=11180
Other than proper racing plugs that are ******* expensive, the BCR8ES is the only very common short nose plug you lot might be interested in that I'm aware of.
There are loads of sellers so I'm sure somewhere would be able to do a bulk order easily enough.
05-17-2017, 07:29 PM
#37
9 Second Club
It's supposed to be much easier to spark to/from the much smaller tips and iridium is supposed to tolerate heat far better.
But yes long life is another factor. And given some builds have plugs that are pretty hard to access...long life maybe not such a bad thing !
https://www.sparkplugs.co.uk/iridium-spark-plugs
http://www.ngk-sparkplugs.jp/english...ium/index.html
http://www.ngk-sparkplugs.jp/english...2_1/index.html
Whether the real world shows any benefits is another matter. LS etc ignition systems are very powerful anyway so would still fire even ***** plugs unless there is a major issue.
It would be interesting to see some of those dyno places who do tests to do some back to back tests of various plugs in a decent motor to see if there are any measurable differences
But yes long life is another factor. And given some builds have plugs that are pretty hard to access...long life maybe not such a bad thing !
https://www.sparkplugs.co.uk/iridium-spark-plugs
http://www.ngk-sparkplugs.jp/english...ium/index.html
http://www.ngk-sparkplugs.jp/english...2_1/index.html
Whether the real world shows any benefits is another matter. LS etc ignition systems are very powerful anyway so would still fire even ***** plugs unless there is a major issue.
It would be interesting to see some of those dyno places who do tests to do some back to back tests of various plugs in a decent motor to see if there are any measurable differences
05-17-2017, 08:18 PM
#38
If you were to use identical geometry plugs (same electrode size, etc) with copper, iridium, and platinum, the copper will out perform both the iridium and the platinum. The electrical conductivity AND the thermal conductivity of copper is much better than iridium and platinum. This would suggest a stronger spark with the copper from the electrical conductivity portion and that you would have lower chances of pre-ignition on concecutive cycles from the thermal conductivity part.
The only off the shelf material used for spark plug electrodes that has a slightly improved electrical and thermal conductivity are silver electrodes. I think both were slightly higher last time I looked.
The main reason to move to the exotic metals is the erosion that occurs from the spark events is drastically reduced compared to copper. But the reason copper works better for all of us, is because of what I said above.
The only off the shelf material used for spark plug electrodes that has a slightly improved electrical and thermal conductivity are silver electrodes. I think both were slightly higher last time I looked.
The main reason to move to the exotic metals is the erosion that occurs from the spark events is drastically reduced compared to copper. But the reason copper works better for all of us, is because of what I said above.
05-18-2017, 03:46 AM
#39
9 Second Club
That would seem to totally contradict what all the plug makers say about them though.
And dont forget it is only the actual discharge tips that are precious metal, all other parts are still the same materials.
And dont forget it is only the actual discharge tips that are precious metal, all other parts are still the same materials.
