Print

Please login or register.
1 Hour 1 Day 1 Week 1 Month Forever
Login with username, password and session length

[beerman]

poster on the FXSTSSE board a little further down the site mentioned he was very pleased with the improvements a pair of NGK plugs in a 1 step colder range helped his 110 SE motor. I was at a dealer a few days later a ordered a couple pair and tried them last night. Short ride -upper 70's  - but I have to agree. Bike ran better, and sounded a little crisper. My 2Cents. Part # is DCPR8EIX NGK's
Pretty cheap experiment all in all
-Beerman

[Seegarsmkr]

Thnx beerman...will look into it.  I should be united with my baby in 29 days.

Seegarz

[skippy]

I put them in , they seem to help on start up and good throttle response still out on the heat issue rode today in 93 temps my oil temp at the oil tank still around 230 to250  the same temps with the stock plugs.....

[grc]

I put them in , they seem to help on start up and good throttle response still out on the heat issue rode today in 93 temps my oil temp at the oil tank still around 230 to250  the same temps with the stock plugs.....

The spark plug heat range won't have any affect on the engine temp or the oil temp.  It will have an affect on things like preignition and/or fouling; too "hot" can cause preignition, too "cold" can lead to fouling and misfire.  The heat range of a plug refers to how much heat is retained in the electrodes, and that is controlled by design and materials.

Jerry

[Stormer]

do you have a number for an ngk plug for my 2003  "103" i would like to try a cooler plug.
thanks

[beerman]

no, but the NGK website should have it

[grc]

do you have a number for an ngk plug for my 2003  "103" i would like to try a cooler plug.
thanks

All of the Twin Cams (88/96/103/110) call for the same plug.  The standard heat range in an NGK Iridium plug would be their # DCPR7EIX.  The plug mentioned earlier in this thread, DCPR8EIX, is listed as standard for the V-Rod engine.

The answer to your question is, the same plug mentioned here for the 110 will fit your 103.

Jerry

[iski]

All of the Twin Cams (88/96/103/110) call for the same plug.  The standard heat range in an NGK Iridium plug would be their # DCPR7EIX.  The plug mentioned earlier in this thread, DCPR8EIX, is listed as standard for the V-Rod engine.

The answer to your question is, the same plug mentioned here for the 110 will fit your 103.

Jerry

Thanks grc  re: the iridium NGK number.  Had excellent results with them in the past and figure they will work well in my 110.

[Stormer]

thank you, got an email from ngk today with this info thanks again for your response.

[Stormer]

Installed iridium ngks today, went with the cooler plug "dcpr7eix" (replace the 7 with 8 and get original heat range) I do believe it made a difference, not sure why maybe a more controlled burn in the cylinder?. but one thing for sure is between 2500 and 3000 rpm i used to have ping when rolling on, today its gone, same gas etc, smoother idle? seems like it and a better start up. got em through napa, had em overnite. thats all i got today.

[Deuce Bigelow]

Installed iridium ngks today, went with the cooler plug "dcpr7eix" (replace the 7 with 8 and get original heat range) I do believe it made a difference, not sure why maybe a more controlled burn in the cylinder?. but one thing for sure is between 2500 and 3000 rpm i used to have ping when rolling on, today its gone, same gas etc, smoother idle? seems like it and a better start up. got em through napa, had em overnite. thats all i got today.

so the cooler plug number is "DCPR7EIX"?         not DCPR8EIX...

[grc]

so the cooler plug number is "DCPR7EIX"?         not DCPR8EIX...

No, the NGK numbering system uses lower numbers for hotter heat range plugs.  The DCPR7EIX is the standard heat range for a Twin Cam engine.  The -8- would be the cooler heat range plug.

Jerry

[Seegarsmkr]

Thanx Jerry, so what is the better plug for the 07 SEs---7, 8 or something else?   

Seegarz

[grc]

Thanx Jerry, so what is the better plug for the 07 SEs---7, 8 or something else?   

Seegarz

Seegarz,

I seriously doubt that you would notice much difference between the two.  If you've had your bike tuned and the mixture richened up, I would stick with the standard heat range to avoid premature fouling.  The whole heat range thing is an approximation at best, based on an average driving cycle.  If you were to just putt around all the time, the hotter plug would be best, but if you ride like our friend Hoist (WFO)   a cooler plug could be beneficial.  For most of us, the standard heat range is the best compromise.

The real advantage of the Iridium plugs is the very fine wire electrode.  A fine electrode requires less voltage to fire, and the iridium material resists erosion much better than normal materials so the plug lasts much longer.

Jerry

[Seegarsmkr]

Thanx again!!

Seegarz