Jump to content
SAU Community

Recommended Posts

I'm pretty sure that NGK sell both .8mm gapped and 1.1mm gapped plugs. I think say for example BCPRE6E or what ever it is is gapped to .8mm and if the same BCPRE6E-11 or somthing is gapped at 1.1mm

I'm pretty sure but don't quote me Check NGK's WWW site there is a legend to tell you exactly what every letter and number means in the code.

Anyway I'm running or I will be soon the NGK's V Groove Coppers gapped to .8mm and they are 1 range cooler than normal plugs as I am running 14psi, it supposivly prevents detonation as there is less heat in turn you can run more advance with the higher boost levels.

Until I get the mods finished then I will slap a set of platiniums in.

Note with the heat range cooler apparently they can cause a little bit of a grumbly idle. I will find out i guess.

Originally posted by ONARUN

wow. so when i changed my plugs a few weeks back, the platinums i threw out were in there for 7 years!?

You had your 'Line for 7 years? wow!

Anyway I've asked around and the NGK Iridium plugs are the best. They last 100,000kms and come in gaps of .8, .9 and 1.1mm. The model number for the RB25DET is BKR5EIX so I'll be picking up a set of these tomorrow for $18.50 a plug. I hope they go well...

You're kidding yourself if you think platinums will last 100,000kms! I've gone through 2 sets since I've had my car, and i've only had it 2 years. If your car is like every other skyline out there and runs rich, you're not going to get any more than 20-30,000kms out of em before they start to lose their efficiency.

For $2.50-$3 each for copper ngk's, I know what I'll be using. Not sure how that works out to be $30 bucks!

My cars running 1.2-1.4 bar of boost, and I've had no problems with spark.

matt

Originally posted by -Joel-

The difference is i guess that plats last up to 100,000kays for approx $100 for set where as for coppers they only last 10,000-20,000 kays for around $30 bucks a set.  

Plus fiddling with those dodgy coils, I'd rather change every 100,000kays. :P

Should search around on SDU first as this question has been answered many times before in the past.

Basically as matlowth said, they do get fouled easily b/c of the fuel mixture, so coppers are the way to go...

The more expensive plugs dont give more power, but do last longer and use better conductors, so a copper plug needs a smaller gap so the spark can jump.

Higher boost also means you need a smaller gap, as does a colder heat rating spark.

If you dont have a heavily modded car, then the plug you want is NGK BCPR6ES.

They are gapped to .8 mm and will do the job well. Dont bother getting a colder plug BCPR7ES as I did. Because my car is stock (besides exhaust and boost), the colder heat rating dont work as well...

Zahos

Well I went with the Iridiums that cost me $111 for the set. I decided on the iridiums simply cos I'm running a SAFC to fix the richness problem plus I'm running higher boost. I got the 0.9mm gapped plugs with a temp rating of 6. I'll probably end up taking them out every 20,000kms to clean them anyway so perhaps the coppers are the way to go...

i use ngk coppers... only 24 bux for a set of 6 and thats all you need! i read somewhere though that you gotta replace coppers every 10thou k's so. compared to the iridiums that i had (damn $80 too) its very good. one i use are NGK's BKR7E:- pre-gapped to 0.8 and one heat range colder.

I'm running NGK iriway 7's and they are awesome. I paid $18 each. They are not like the normal iridiums IX they come gapped at 0.6mm and come in colder heat ranges 7,8,9. NGK state that you shouldn't regap iridiums. If anyone wants a set of NGK IRIWAY, IRITOP, IRIMAC spark plugs drop me an email and i will hook you guys up. BTW I am not selling them i just know a guy who imports them. Also www.onautos.com.au sell the iridium IX plugs for $14.50 each anyone who pays more than that is getting ripped.

Originally posted by uLa32

i use ngk coppers... only 24 bux for a set of 6 and thats all you need! i read somewhere though that you gotta replace coppers every 10thou k's so. .

yeah you have to replace them every 10K's but at least you get to have new plugs every year as opposed to them sitting in there for five years and possibly going foul sooner than you might have planned due to a rich problem or oil getting in there.

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...