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| Extended reach peanut plug? https://www.slantsix.org/forum/viewtopic.php?t=46795 |
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| Author: | 87D100 [ Wed Oct 26, 2011 2:33 pm ] |
| Post subject: | Extended reach peanut plug? |
Today, at work, amidst the daily grind of fixing modern sh**boxes, I came upon this:  sorry for the blurry cell phone pic. they are tapered seat. Champion number: RE16MC Application: 2004 Chrysler PT Cruiser, 2.4L Turbo. I was wondering if someone who knows more about plug numbers and heat ranges than me could tell if these are a viable option for an extended reach plug for peanut plug heads. Maybe I'm just dreaming, thought it might be of some help. Kevin :shrug: |
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| Author: | Aggressive Ted [ Wed Oct 26, 2011 2:39 pm ] |
| Post subject: | |
Looks like it would make a good piston stop! On NGK heat ranges a UR4 is colder than a UR6. UR6 is the stock plug for peanut plug heads. |
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| Author: | 87D100 [ Wed Oct 26, 2011 2:43 pm ] |
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OK, so I am just nuts  I thought I remembered u guys with early heads running jeep 4.0 plugs and if memory serves me right, those are a very long plug like these with a gasket seat. Oh well, it was worth a shot.Kevin |
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| Author: | SlantSixDan [ Wed Oct 26, 2011 2:58 pm ] |
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Quote: Looks like it would make a good piston stop!
Yup, it's wayyyy too longQuote: On NGK heat ranges a UR4 is colder than a UR6.
No. Other way round. In NGK numbers, higher number = colder plug, lower number = hotter plug.Quote: UR6 is the stock plug for peanut plug heads.
UR4 or UR5 depending on year. With today's clean-burning fuel, UR4 is unnecessarily hot, UR5 is a sound choice, and UR6 will buy some ping-resistance on an engine in good condition.
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| Author: | 87D100 [ Wed Oct 26, 2011 3:21 pm ] |
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well, that resolves that, sorry for the waste of space  Kevin |
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| Author: | Eric W [ Wed Oct 26, 2011 4:59 pm ] |
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Nothing wrong with your post. At least your always thinking of the slant, thats not bad! 
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| Author: | olafla [ Wed Oct 26, 2011 5:04 pm ] |
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Here is a link to a site for identifying the codes used on NGK, Denso and Bosch spark plugs: carsparkplugs.com. Olaf. |
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| Author: | Reed [ Wed Oct 26, 2011 5:07 pm ] |
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Every day, in every way, we are all making slants better and better! It's a group effort to replace the Chrysler R&D department and keep slant six development moving forward. New ideas are welcomed. That way they can be evaluated and approved or discarded or sent back for further research. |
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| Author: | 87D100 [ Wed Oct 26, 2011 5:19 pm ] |
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What is the maximum reach that would work, or more importantly, be of any benefit in a peanut plug head? I was on the Champion website, and the stock plugs are 5/8" reach, the ones i showed the pic of are 1" reach. Just curious so I can keep my eyes out for something that might work. Kevin |
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| Author: | Aggressive Ted [ Wed Oct 26, 2011 6:21 pm ] |
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Sorry about that folks.....bad multi-tasking and brain fade..... Thanks Dan! |
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| Author: | olafla [ Wed Oct 26, 2011 10:13 pm ] |
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The stock plugs for 'peanut' heads has a 0.460" reach, the Champion catalog's 5/8" (0.625") must be incorrect. Olaf. |
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| Author: | SlantSixDan [ Wed Oct 26, 2011 11:59 pm ] |
| Post subject: | |
You must use a plug of the correct reach. Longer or shorter is not okeh. "Reach" refers only to the length of threads as measured starting at the seat plane -- it does not include the length of the electrodes. There's some variance on reach spec depending on source. In 1981, Chrysler said the reach on the Champion RBL16YC taper-seat spark plug for the 225 engine is 3/8" (0.375"). That plug appears to still be available in the U.K. product lineup (see here, showing in stock) with a stated reach of 0.42". In the US lineup, that plug has been replaced by the RV15YC4, which has a stated reach of 0.46". NGK say the plug for this application (UR4) has a reach of 0.625". Which spec is right? Maybe all of them; remember we're dealing with a tapered seating plane, so there is probably some variation in where the reach is measured from. (also take note the plugs above -- Champion 16s and NGK 4s -- are at least one heat range hotter than is probably optimal with today's fuels) |
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| Author: | olafla [ Thu Oct 27, 2011 7:31 am ] |
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Quote: NGK say the plug for this application (UR4) has a reach of 0.625 . Not correct. If you have been on ngk.com site, you will see in the side bar on the left side that the text layout is so bad, that it is very easy to read the 5/8" as Reach, when in fact it is the number on the line above that describes the reach. I have both UR4 and UR45IX plugs here, they both have a .460 reach. Olaf. |
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| Author: | SlantSixDan [ Thu Oct 27, 2011 8:49 am ] |
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Good catch; I misread the NGK presentation on that plug on that site. |
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