Jump to content
SAU Community

Recommended Posts

I have been chasing a set of replacement copper plugs to try with the E85 im about to be running, Apparently the iridium plugs can glow causing pre-ignition. I found the STI's are running similar plugs and they had this list on their forum.

LFR6AP-9 OEM nm35 Stagea (Platinum)

IKH22 5345 Denso equiv. (Im running these at the moment.)

STI List:

NGK IFLR6B (Iridium)--Subaru STI OEM Plug

NGK PLFR6-11 (Platinum)

NGK LFR6AIX-11 (Iridium IX)

NGK LFR7AIX-11 (Iridium IX)--"one step colder"

NGK LFR6A-11 (Copper)

Denso IKH20 (Iridium)

Denso IKH22 (Iridium)--"one step colder"

I still havent worked out what heat range I should be going for, colder if there is pre-ignition, hotter if I have cold start problems from what I have read. Any plug experts around?

Edited by scotty nm35
Link to comment
https://www.sau.com.au/forums/topic/311431-m35-plug-replacement/
Share on other sites

I still havent worked out what heat range I should be going for, colder if there is pre-ignition, hotter if I have cold start problems from what I have read. Any plug experts around?

thats basically it. something else to think about, if your using too cold of a plug they will foul up quickly. the plugs have a kind of "self clean", to help with soot build up on the electrode. this process wont work as good if a plug that is too cold for your application is used.

i have no idea about what is required for E85, have you looked in the FI section, i've seen a few topics come up about E85?

i've only really used NGK plugs, and can help you out with their part numbers. i have a chart i use that i found on the breakdown of the part numbers you may be interested in. its a few post down in this thread LINK

  • 4 years later...

Hi, I know this is an old thread but I wanted put these plugs out there to see if anyone has tried them.

Brisk ER14YS

They use a silver electrode and are rated for 45k kms, and the 14 is the same as a 7 heat range for the NGK plugs or 22 for the Denso's. And they seem to be popular with the EVO IX crowd.

Thanks,

Grant.

I had a lot of issues running the Denso's, to the extent they completely melted in 10,000k's (although I am pushing things hard.) The stainless threads also seize up in the thread easily without some antisieze on them. They are rated to 160,000 but obviously aren't that good for turbo applications.

I am sure anything will run fine as the stock coils throw a fair spark, but I stick to the NGK's these days, LFR7AIX, due to them lasting so much longer. For $15 a plug it just isn't worth changing them any more often than you have to.

The Evo crowd isn't the smartest... I know this well, as I have a 7. :P

  • Like 1

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now


  • Similar Content

  • Latest Posts

    • Surely somebody has one in VIC. Have you asked at any shops?  Is this the yearly inspection or did you get a canary?
    • This is where I share pain with you, @Duncan. The move to change so many cooling system pieces to plastic is a killer! Plastic end tanks and a few plastic hose flanges on my car's fail after so little time.  Curious about the need for a bigger rad, is that just for long sessions in the summer or because the car generally needs more cooling?
    • So, that is it! It is a pretty expensive process with the ATF costing 50-100 per 5 litres, and a mechanic will probably charge plenty because they don't want to do it. Still, considering how dirty my fluid was at 120,000klm I think it would be worth doing more like every 80,000 to keep the trans happy, they are very expensive to replace. The job is not that hard if you have the specialist tools so you can save a bit of money and do it yourself!
    • OK, onto filling. So I don't really have any pics, but will describe the process as best I can. The USDM workshop manual also covers it from TM-285 onwards. First, make sure the drain plug (17mm) is snug. Not too tight yet because it is coming off again. Note it does have a copper washer that you could replace or anneal (heat up with a blow torch) to seal nicely. Remove the fill plug, which has an inhex (I think it was 6mm but didn't check). Then, screw in the fill fitting, making sure it has a suitable o-ring (mine came without but I think it is meant to be supplied). It is important that you only screw it in hand tight. I didn't get a good pic of it, but the fill plug leads to a tube about 70mm long inside the transmission. This sets the factory level for fluid in the trans (above the join line for the pan!) and will take about 3l to fill. You then need to connect your fluid pump to the fitting via a hose, and pump in whatever amount of fluid you removed (maybe 3 litres, in my case 7 litres). If you put in more than 3l, it will spill out when you remove the fitting, so do quickly and with a drain pan underneath. Once you have pumped in the required amount of clean ATF, you start the engine and run it for 3 minutes to let the fluid circulate. Don't run it longer and if possible check the fluid temp is under 40oC (Ecutek shows Auto Trans Fluid temp now, or you could use an infrared temp gun on the bottom of the pan). The manual stresses the bit about fluid temperature because it expands when hot an might result in an underfil. So from here, the factory manual says to do the "spill and fill" again, and I did. That is, put an oil pan under the drain plug and undo it with a 17mm spanner, then watch your expensive fluid fall back out again, you should get about 3 litres.  Then, put the drain plug back in, pump 3 litres back in through the fill plug with the fitting and pump, disconnect the fill fitting and replace the fill plug, start the car and run for another 3 minutes (making sure the temp is still under 40oC). The manual then asks for a 3rd "spill and fill" just like above. I also did that and so had put 13l in by now.  This time they want you to keep the engine running and run the transmission through R and D (I hope the wheels are still off the ground!) for a while, and allow the trans temp to get to 40oC, then engine off. Finally, back under the car and undo the fill plug to let the overfill drain out; it will stop running when fluid is at the top of the levelling tube. According to the factory, that is job done! Post that, I reconnected the fill fitting and pumped in an extra 0.5l. AMS says 1.5l overfill is safe, but I started with less to see how it goes, I will add another 1.0 litres later if I'm still not happy with the hot shifts.
    • OK, so regardless of whether you did Step 1 - Spill Step 2 - Trans pan removal Step 3 - TCM removal we are on to the clean and refill. First, have a good look at the oil pan. While you might see dirty oil and some carbony build up (I did), what you don't want to see is any metal particles on the magnets, or sparkles in the oil (thankfully not). Give it all a good clean, particularly the magnets, and put the new gasket on if you have one (or, just cross your fingers) Replacement of the Valve body (if you removed it) is the "reverse of assembly". Thread the electrical socket back up through the trans case, hold the valve body up and put in the bolts you removed, with the correct lengths in the correct locations Torque for the bolts in 8Nm only so I hope you have that torque wrench handy (it feels really loose). Plug the output speed sensor back in and clip the wiring into the 2 clips, replace the spring clip on the TCM socket and plug it back into the car loom. For the pan, the workshop manual states the following order: Again, the torque is 8Nm only.
×
×
  • Create New...