Jump to content
SAU Community

Spark PLugs

DREMEN

By DREMEN,
in General Maintenance

 Share

Recommended Posts

Guest Master of Disaster

Guest Master of Disaster

Posted
Posted

dude the power curve looks a bit too much like a roller coaster, did the dyno operator back off the throttle at about 115kms??!

You should be able to iron out all those dips! Doesnt look very linear! How does it drive?

I dunno about the heat ranges, but im using Iridiums, gapped to 0.8, which seems to be accepted as the ideal gap. (from a test done in a mag). My old plugs started missing heaps, i pulled them out and the gap was 1.1, which didnt work at all. 0.8 saw the return of smooth clean power.

Cheers, MASTER

Link to comment
https://www.sau.com.au/forums/topic/14609-spark-plugs/#findComment-296057
Share on other sites
DREMEN Rising Star

DREMEN

Posted
  • Author
Posted
Originally posted by Master of Disaster

dude the power curve looks a bit too much like a roller coaster, did the dyno operator back off the throttle at about 115kms??!

You should be able to iron out all those dips!  Doesnt look very linear!  How does it drive?

I dunno about the heat ranges, but im using Iridiums, gapped to 0.8, which seems to be accepted as the ideal gap. (from a test done in a mag).  My old plugs started missing heaps, i pulled them out and the gap was 1.1, which didnt work at all.  0.8 saw the return of smooth clean power.

Cheers, MASTER

That up and down is the "miss" hopefully just due to the spark plugs.... it seems to drive fine on the road....

I haven't replaced the spark plugs since I got the car from japan and therefore they haven't been regapped to run higher boost...

That is why the curve looks like a coke bottle :):P

Where do I buy good plugs from? I.e HKS or Iridiums?

Link to comment
https://www.sau.com.au/forums/topic/14609-spark-plugs/#findComment-297772
Share on other sites
sileighty Grand Master

sileighty

Posted
Posted

could have a look on the net for some good sights that sell quality spark plugs. or go down to repco, autobarn, ect. tell what you got and shouldnt be a problem.

i am up for a change in timing belt and plugs and stuff. going to try some ones from ngk i think with 4 contacts. see how i go

Link to comment
https://www.sau.com.au/forums/topic/14609-spark-plugs/#findComment-302116
Share on other sites
Zahos Mentor

Zahos

Posted
Posted

Iridiums and platinums do not offer any better spark over copper. In fact, the copper plugs are better conductors and offer a better spark. Only think is they dont last as long, which is a good thing on a tuned high performance car, as you would want new plugs at least every 20,000Km.

The Iridiums and platinums till have a copper core anyhow, but have a thin layer coating the core. They shouldn't be re-gapped b/c their tips can be easily scratched, thus turning them into $20 copper plugs as oppossed to $3 copper plugs.

Try some NGK copper plugs, they will work just as well, if not better for a fraction of the price.

The plug you need depends on your driving habbits....

If you drive like a grandma most of the time, NGK BCPR5E or (BCRP5E-11)

If you take it on the track, or thrash it quite often, go for the same in a 6 heat range, so BCPR6E (-11)

Whatever you end up getting, regap them to 0.7. Then make sure you tuner advances your timing to past the 20degree mark (as long as their is no knocking, if there is then he should retard the timing to a safe level). This should help make that power curve look a little more linear. You will never fully get rid of the problem unless you get aftermarket management, as it is an issue with your ignition timing curve on the stock ECU. Boost + stock ECU + VCT = miss at 5000 rpm!

Zahos

Link to comment
https://www.sau.com.au/forums/topic/14609-spark-plugs/#findComment-303313
Share on other sites
Zahos Mentor

Zahos

Posted
Posted

for a larger turbo, a heat range of 7 is good, but for the satandard turbo, 5 is good, or 6 if u are around the 180kw mark. Anything less on an R33 with standard turbo, and you will definately see problems at the 5000rpm mark.

I had 7's in mine with 12psi boost, and for the 1st 2 weeks it was fine. After that they soon fouled easily, so I went down to 6. Because I drive it to work, and dont often thrash it, they fouled after a while too. I've had 5's in there for 3 months now, and I have had no issues...

In DREMEN's case I wouldn't go past a heat range of 6...

Link to comment
https://www.sau.com.au/forums/topic/14609-spark-plugs/#findComment-303714
Share on other sites

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
 Share
Go to topic listing


  • Similar Content

  • Latest Posts

    • MBS206
      Blue slip

      By MBS206 · Posted

      I have been being VERY quiet about what you're alluding to, as it is something that ticks me off... The number of cars from factory that run coil overs is HUGE! Most of them these days do... The other part that annoys me, is people saying "Well all the incabin adjustable suspension is illegal by blah blah blah"... If that's the case, then why can I buy a car brand new that can do it if, FULL STOP in cabin adjustable suspension is illegal...   Also, I could just chuck some aftermarket shocks in my car, throw the stock springs on, after my blue slip, dump my super low springs back in. Same shock and spring style setup... Hell, they could also be the same colour springs etc.     I'm voting, BlueSlipper didn't want to touch the above car for some reason. Whether it be some sort of bias against the car, the owner, them maybe having previously done dodgy shit and now they're being super careful in case they get slapped in the face by the Gumbyment again... Find a new blueslip place.   And can confirm as you had said, yes there are holy bibles of vehicle heights, and all sorts of other suspension stuff. Heck your run of the mill mechanic, and tyre shop has access to all of that stuff. It's how they do wheel alignments...
    • The Bogan
      NC MX5

      By The Bogan · Posted

      Funny story Heading to Sydney this morning on the HWY there was some slow traffic, so I gave it the beans and midway through my overtaking "power run" I lost all power It seems that I missed a hose clamp,  and the MAF and filter went WiFi To make this more problematic, the little tool kit that lives in the boot, is sitting in the sun room at Goulburn......LOL Luckily for me I found a bit of steel on the side of the road that could be used like a rusty and bent flat head screw driver to tighten it up enough that it got me into Sydney, it is now all tight like a tiger with the aid of a 8mm socket Note to self: Use my brain and double check stuff, and always keep that little tool kit in the car for when I have a brain fart
    • MBS206
      Ethanol Content Sensor - Always at 11%?

      By MBS206 · Posted

      Oh, and as for everyone with their fuel economy changes, I switch between E10 and 98 in the company car. Even do when I had personal cars that could run on E10. You know what changed my fuel economy in any noticeable way? How I drove, and where I drove. Otherwise, say on full tanks of just back and forth from work only (So same trips, same sort of traffic), couldn't notice a difference that I can correlate to the type of fuel in use. In the current vehicle, that's over 42L of USABLE fuel. While 98 is all "more energy dense", it also has higher knock resistance as it takes more energy to get it to ignite too. The longer hydrocarbons, typically more tightly bound. So running the same ignition map, can also produce less power, if there isn't enough time to get it all burnt through properly, as yep, the flame propagation speed is different from lower octane fuel to higher (Higher has a lower flame propagation, due to the more tightly bound and harder to self ignite funs. This is also typically where, a vehicle that is designed purely to run on 91 (Whether it be E10 or normal 91) usually sees absolutely no real world difference in fuel economy for the normal man, woman, or dog.
    • MBS206
      Ethanol Content Sensor - Always at 11%?

      By MBS206 · Posted

      We've got some servos around me that have 91 with E10, 91 (no E10), 95, and 98. At those stations the change from 91 E10 to 91, is typically around 8c/L.   But lets not get started on the price of fuel in Oz. It's ridiculous. All the service stations around me, bar one, the price of fuel has been over the $2 mark per litre for the cheapest, 98 being around $2.45. That one service station is a CostCo, fuel from it comes from the same refineries, and makes no pitstops, it runs great, including the 98. In fact, I've had no issues on CostCo fuel, but plenty of issues at other stations!. The CostCo fuel, was $1.65 roughly this week for 94 with E10. $1.88 for 98. Servos directly across from it, $2.10 for 91 E10, and $2.48 for 98. The part I had to laugh at? If I drive multiple HOURS away from Brisbane, say out near Nanango, or Kingaroy, or even out to Goondiwindi, the price of their fuel, is the same as what it is at the CostCo... Oh, and that BP servo at Goondiwindi is HUGE and goes through epic turnover of fuel, so it's not sitting there for weeks going to shit. And what blows me away, my mate is one of the people who drives the Fuel Tanker all around QLD, delivering to all those places. At the same company his previous role was doing the "local haul" deliveries... Same truck, same driver, same pickup point it all comes from. So you tell me, how the hell it is 60c/L CHEAPER for fuel, when nearly all else is equal, except they require a B-Double to drive half a day out of Brisbane, and half a day back, every second day, compared to the delivery that can be under 30 minutes drive from the fuel pickup point... Not to mention, go five blocks down the road, and Ampol to Ampol will vary 30c/L... And I've had this conversation with my mate... The way it's priced, is just typical, pure and utter rubbish... He also does runs from Brisbane, to all over QLD, down to Newcastle, Sydney, Nowra, Melbourne, Geelong, and even out to parts of the NT depending on the companies needs. His main stuff is all the longer distance away from home for a few days at a time, then when he's back, he loves to just pickup extra shifts wherever he can in whichever truck, hence all the weird different places.   Oh, as for getting E10 into all the fuels in Australia... It was very quickly highlighted, that we don't have enough biomass available to use to make E10 sustainably like they require, and it would dramatically cut into our, and the worlds food chain supply...   I vote we all just start running on liquid methane gas... Plenty of that just getting tapped off at tips from underground decay... (Note, this is pure just stupid commenting. I could very easily highlight the reasons its not a good idea especially on scale...)
    • Murray_Calavera
      Questions on potential new purchase

      By Murray_Calavera · Posted

      Am I correct in assuming that the R35's are getting the classic skyline haircut off the odometer?  Quick search on carsales, there are 33 08 and 09 GTR's for sale, only 2 of them have more then 100,000km's on them (116,075 and 110,000 respectively).  And somehow there are about 25 for sale with around 60,000kms? Looks like the classic skyline haircut to me =/
×
×
  • Create New...