Jump to content
SAU Community

Recommended Posts

Good read.

One thing I would like to chuck into the ring is the performance side of things.

I remember when I switched to iridiums in my CBR900. Holy shit. SOP dyno said 5hp right thru the rev range. And it wasn't just the switch from old to new plugs as I had done that 10 times before going iridiums. And throttle response was markedly improved. It help with the throttle hand/rear tyre connection something fierce.

I've been an advocate of iridiums ever since.

Why am I surprised that people don't report better performance with iridiums over copper in their cars?

I picked up some iridiums this week. Will chuck em in with fresh oil next weekend and report back.

  • 3 weeks later...

ok ok very confused after reading all that!

i have brought new coil packs, and i want to change the plugs at the same time and the coils!

my car is r32 with rb25det s2 simple mods fmic, fuel pump, full 3inch exhaust and a hi low boost control 7 and 10psi

i drive mainly on 7psi!

what plugs and what gap?

thanks

ok ok very confused after reading all that!

i have brought new coil packs, and i want to change the plugs at the same time and the coils!

my car is r32 with rb25det s2 simple mods fmic, fuel pump, full 3inch exhaust and a hi low boost control 7 and 10psi

i drive mainly on 7psi!

what plugs and what gap?

thanks

The rule of thump, with those mods you run bcpres6 copper ones and if you boost past 13-14 go 1 colder and get bcpres7

no need for confusion really...

90% of people on here and pretty much every tuner i have spoken to use and reccomned either BCPR7ES gapped @ 0.8 or BCPR6ES gapped @ 0.8

use that and you will be fine

:/

its not that iridiums aren't better also.... its just that in a modified environment they can die just as quickly as coppers and offer no real gains other than the price

Fixed my missfire that i had for 5 months by putting in BCPR6ES at .7 gap, had iridiums in before at at heat range 7 and .7 gap and they were shit, but most likely due to car running really rich for so long.

Put platinum ones in mine about 3 years ago done about 65k still fine checked at each oil change or service

Running light mods and .85 bar boost no problems no miss fire best plugs i've bought so far but a bit expensive

thought id try them after I was surprised they lasted over 160k in my astra 2.2 coupe (holden)

Edited by jjskyline79

I bought a six pack of Bosch Platinums today from Super Cheap. Cost me about $38. They are the FR7DPX ones. Has anyone used these before? They are pre-gapped at 1.1, but keep reading on here folks going for a 0.8 gap. Have read things in this huge thread and will continue to do so. But so far seeing way more references to NGK coppers vs anything Bosch.

yeah, everyone seems to love the nkg's. but when it comes to gapping, if you're pretty stock then 1.1's will prob be ok. it's like oil tho, different for every car, and might take a few changes to get the perfect setup. just listen out for a miss

  • 2 weeks later...

found my cause of misfire, 2 of my coils were missing the spring, and as a result there was some white powder stuff on top of the plug and in the coil at the base.. cleaned out and with new springs and plugs fixed my missfire.

  • 5 weeks later...

was taping up my coilpacks to try to solve a missfire while i save for yellow jackets and had a look at the spark plugs, only to find them very very black. I'm using ngk bkr6es plugs with standard 1.1mm gap and they have about 3500km's on them. do i need a higher heat rating? or is it running rich or something?

car is a stockish r34 gtt with 3.5" catback somehow boosting to 12-13psi (still trying to figure out why that is)

Edited by Galois

If you have dodgy coils try gapping your plugs down to 0.8 til you get new ones. Could possibly explain why they are so black (don't all RBs run rich from stock?) or if you're keen try some NGKBCPR5ES

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

    • Well, that's kinda the point. The calipers might interfere with the inside of the barrels 16" rims are only about 14" inside the barrels, which is ~350mm, and 334mm rotors only leave about 8mm outboard for the caliper before you get to 350, And.... that;s not gunna be enough. If the rims have a larger ID than that, you might sneak it in. I'd be putting a measuring stick inside the wheel and eyeballing the extra required for the caliper outboard of the rotor before committing to bolting it all on.
    • OK, so again it has been a bit of a break but it was around researching what had been done since I didn't have access to Neil's records and not everything is obvious without pulling stuff apart. Happily the guy who assembled the engine had kept reasonable records, so we now know the final spec is: Bottom end: Standard block and crank Ross 86.5mm forgies, 9:1 compression Spool forged rods Standard main bolts Oil pump Spool billet gears in standard housing Aeroflow extended and baffled sump Head Freshly rebuilt standard head with new 80lb valve springs Mild porting/port match Head oil feed restrictor VCT disabled Tighe 805C reground cams (255 duration, 8.93 lift)  Adjustable cam gears on inlet/exhaust Standard head bolts, gasket not confirmed but assumed MLS External 555cc Nismo injectors Z32 AFM Bosch 023 Intank fuel pump Garret 2871 (factory housings and manifold) Hypertune FFP plenum with standard throttle   Time to book in a trip to Unigroup
    • I forgot about my shiny new plates!
    • Well, apparently they do fit, however this wont be a problem if not because the car will be stationary while i do the suspension work. I was just going to use the 16's to roll the old girl around if I needed to. I just need to get the E90 back on the road first. Yes! I'm a believer! 🙌 So, I contacted them because the site kinda sucks and I was really confused about what I'd need. They put together a package for me and because I was spraying all the seat surfaces and not doing spot fixes I decided not to send them a headrest to colour match, I just used their colour on file (and it was spot on).  I got some heavy duty cleaner, 1L of colour, a small bottle of dye hardener and a small bottle of the dye top coat. I also got a spray gun as I needed a larger nozzle than the gun I had and it was only $40 extra. From memory the total was ~$450 ish. Its not cheap but the result is awesome. They did add repair bits and pieces to the quote originally and the cost came down significantly when I said I didn't need any repair products. I did it over a weekend. The only issues I had were my own; I forgot to mix the hardener into the dye two coats but I had enough dye for 2 more coats with the hardener. I also just used up all the dye because why not and i rushed the last coat which gave me some runs. Thankfully the runs are under the headrests. The gun pattern wasn't great, very round and would have been better if it was a line. It made it a little tricky to get consistent coverage and I think having done the extra coats probably helped conceal any coverage issues. I contacted them again a few months later so I could get our X5 done (who the f**k thought white leather was a good idea for a family car?!) and they said they had some training to do in Sydney and I could get a reduced rate on the leather fix in the X5 if I let them demo their product on our car. So I agreed. When I took Bec in the E39 to pick it up, I showed them the job I'd done in my car and they were all (students included) really impressed. Note that they said the runs I created could be fixed easily at the time with a brush or an air compressor gun. So, now with the two cars done I can absolutely recommend Colourlock.  I'll take pics of both interiors and create a new thread.
    • Power is fed to the ECU when the ignition switch is switched to IGN, at terminal 58. That same wire also connects to the ECCS relay to provide both the coil power and the contact side. When the ECU sees power at 58 it switches 16 to earth, which pulls the ECCS relay on, which feeds main power into the ECU and also to a bunch of other things. None of this is directly involved in the fuel pump - it just has to happen first. The ECU will pull terminal 18 to earth when it wants the fuel pump to run. This allows the fuel pump relay to pull in, which switches power on into the rest of the fuel pump control equipment. The fuel pump control regulator is controlled from terminal 104 on the ECU and is switched high or low depending on whether the ECU thinks the pump needs to run high or low. (I don't know which way around that is, and it really doesn't matter right now). The fuel pump control reg is really just a resistor that controls how the power through the pump goes to earth. Either straight to earth, or via the resistor. This part doesn't matter much to us today. The power to the fuel pump relay comes from one of the switched wires from the IGN switch and fusebox that is not shown off to the left of this page. That power runs the fuel pump relay coil and a number of other engine peripherals. Those peripherals don't really matter. All that matters is that there should be power available at the relay when the key is in the right position. At least - I think it's switched. If it's not switched, then power will be there all the time. Either way, if you don't have power there when you need it (ie, key on) then it won't work. The input-output switching side of the relay gains its power from a line similar (but not the same as) the one that feeds the ECU. SO I presume that is switched. Again, if there is not power there when you need it, then you have to look upstream. And... the upshot of all that? There is no "ground" at the fuel pump relay. Where you say: and say that pin 1 Black/Pink is ground, that is not true. The ECU trigger is AF73, is black/pink, and is the "ground". When the ECU says it is. The Blue/White wire is the "constant" 12V to power the relay's coil. And when I say "constant", I mean it may well only be on when the key is on. As I said above. So, when the ECU says not to be running the pump (which is any time after about 3s of switching on, with no crank signal or engine speed yet), then you should see 12V at both 1 and 2. Because the 12V will be all the way up to the ECU terminal 18, waiting to be switched to ground. When the ECU switches the fuel pump on, then AF73 should go to ~0V, having been switched to ground and the voltage drop now occurring over the relay coil. 3 & 5 are easy. 5 is the other "constant" 12V, that may or may not be constant but will very much want to be there when the key is on. Same as above. 3 goes to the pump. There should never be 12V visible at 3 unless the relay is pulled in. As to where the immobiliser might have been spliced into all this.... It will either have to be on wire AF70 or AF71, whichever is most accessible near the alarm. Given that all those wires run from the engine bay fusebox or the ECU, via the driver's area to the rear of the car, it could really be either. AF70 will be the same colour from the appropriate fuse all the way to the pump. If it has been cut and is dangling, you should be able to see that  in that area somewhere. Same with AF71.   You really should be able to force the pump to run. Just jump 12V onto AF72 and it should go. That will prove that the pump itself is willing to go along with you when you sort out the upstream. You really should be able to force the fuel pump relay on. Just short AF73 to earth when the key is on. If the pump runs, then the relay is fine, and all the power up to both inputs on the relay is fine. If it doesn't run (and given that you checked the relay itself actually works) then one or both of AF70 and AF71 are not bringing power to the game.
×
×
  • Create New...