Col-GTSX

BTW sorry to sound rude or anything. I had thought of those things... I just thought id put the problem in terms everyone can understand... But my question still is current... (from first post) Who told you to use 6/7's as your plug temp.... Im keen to run a test using 6/7's but i might just use $4 plugs that i got laying round. Im sure the iridium results would be much the same...

Thats amazing........

The S2 R33 has the inbuilt ignightors. Yes true thats what i have also. I re-gapped the plugs to .8 properly with feeler gadges this time and took for a run and what a dream. Problem solved, You see the iridium tip is much smaller than copper plugs. Thus causing a limited firing area. The standard coils were never designed with iridium plugs in mind. The only solution is to re-gap to 0.8mm or to purchase splitfire coils. Re-gapping will reduce the sparks intencity however only take an hour or so. As if you purchase splitfire coils its gonna be 30 minutes labour but $650 for the coils... LOL I had a set of splitfire's in my old line and did notice a smoother more consistent combustion. However look at the hp gains and tell me that $650 is well spent. Yes there is a certain point where you need to go and get a set. But for most of us its a part that is just not needed. I would like to ad that the coil packs are perfect. Have run them on the test bench at work to beyond expected limitations and their all fine. Greg i aggree with what your saying there. However this is not the case on this one. I decided to run a plug on a testing machine. I dialed in the power output an rb25 (in-built ignighter) is capable of. 1st test at 1.1mm 2nd test at 1mm 3rd test 0.9mm 4th test 0.8mm 5th test 0.7mm I will start by saying this plug used in tests had to be thrown out as when i tryed to re-open the gap the tip broke due to many changes in the gap. I will start by saying at 1.1mm the plug performed perfectlly however at a simulation on 13,000rpm the plug started to fail. On the other end of the scale at 0.7mm the plug started to fail at 16,000rpm..... Dial up to the output of a sliptfire and the results were much better. The size of the spark and intencity was amazing and the plug didnt fail at all at 1.1mm (the test machine can only go so fast) Testing 1.1mm at 13000rpm and failing in a controled enviroment could be the same as 5000rpm in a skyline with 150C+ temps around the plug with 10psi of boost inside the chamber... The smaller the gap the higher the plug will go (in test conditions) and id dare to say the longer it will last. So in summary the way to solve this problem as tested is 1 of 2 things 1. Re-gap to 0.8mm or there abouts ($0) 2. Buy a set of splitfire coils ($650ish)

I like the redcliffe idea... As its close to home... But SAU comes first... Sorry

Cyrus does not need to wave... The massive green stripes say "LOOK AT ME" and wave automaticly... LOL

Ok, regapped the plugs to 0.8mm (well as close to this point as possible). Car certainlly ran better, however it still has a slight miss at about 6000rpm to 7000rpm... Ill pull em out again and re-gap them to 0.7 and try again i guess.... Its funny that NGK-R plugs at 4 bucks each dont have these problems....

Saw like 4 skylines today on my way from Chermside to Forestdale (Nice Drive) I waved to all of you and 3 of the cars drivers just stared at me as tho i was weird or something... The other one didnt see me at all....

So can i arrage to pick up a set of stockies????

I just found this handy picture as well from their website... This shows how much energy is needed at what gap on what plug....

Oh well that leaves me out... But my car can come... LOL

I just checked the ngk website.... You can do a search for the right plugs for you and i found this... Your Vehicle: 1993.8 - 1998.5 NISSAN SKYLINE 2500 TURBO RB25DET Spark Plug Part No. Recommended Plug PFR5G-11 Iridium Option BKR5EIX-11 The iridium plugs listed there are the ones a bought and had suggested as the best in my post above.... Any thoughts guys... After reading more posts. I think gapping the plugs is the answer or upgrading to splitfire coil packs.... Gapping is cheaper... LOL

It seems as though most of us have had problems with miss firing at or above 7psi once iridium plugs have been installed. I noticed after searching many threads that people are using 7/6's as their plug temp. I had a very long chat with the NGK sales rep and he said you should use 5's in an rb20/25 motor. I did and had no trouble, however with my new line R33 i am getting miss firing above 8psi.... Runs like a little beatch... I have to say i didnt gap them as it started raining as i put them in so i was in a rush. Do you think the standard gap out of the box is too large and the boost is blowing out the spark??? I believe this to be the case. But i write this wondering who told you to run 7/6's and not 5's???? Autobarn said 5's are the most popular iridium they sell by far. Any ideas guys??? So did most of you find the gap to be the problem??? This is a thread explaining the same issue... http://www.skylinesaustralia.com/forums/sh...t=blowing+spark

I am currentlly having this problem... I put in iridium's last night and what do you know. Everything over 8-9psi it misses like a littch beatch.... How do you guys go... I used 5's as their a colder plug and worked really well in my old rb20 powered line.

Mud is a chump.... LOL WHERE you going man... and WHEN you gonna be there????

Ill put my hand up to say how good these turbos are... I will also add apart from a few little mods to exhaust and piping this is a fun upgrade... This is a real father/son mod and the results are sure to put a smile on your face... Dont forget 24psi is easily done by one of these turbos but your motor wont handle it.... I found out the hard way many skylines ago... But yeah bang for buck this turbo is great. I will also say 1500 bucks is cheap too... Free Bump

QLD... by the photos the car has QLD plates... Are you in Brisbane as i want a stock set of rims for mine... Wanta pick em up if i can....

Did you buy this from ebay??? Cause if you did do you relize their copies....???

Sorry no coil pack left...

Cannot do. Otherwise the motor sale will not go ahead.... Then i stuck with everything else. People i have to call this guy by 3pm... Anyone want it....

Heaps of tyre kickers here... Have an offer on motor for $400... Have said will think about it for 24 hours... Anyone here wanta offer $450 and its yours... Need the space more than ever...

No worries... Always willing to help out a fellow SAU member/user.... I figure pay what its worth. Ill never use it so what do i need...

Engine/Car RB20det (niccs red top)/HR31 Type of failure: CHITTY CHITTY BANG BANG/Fire Factors: Busted AFM with a well used turbo and 32psi of boost State of engine: Heavily Modded Suspension and tyres: Rock Hard and Wide Oil: Motul every 2000-6000km's (i didnt drive it much so 2000km's in 6 months was about average)

BTW im on holidays atm so just name a time and ill pm u my address and you can drop over and get it.... You can have it for a pack of smokes... Hows that....

Yeah i still got like a box full of em.... Cant remember how many turbos i have changed around on my car/s... LOL

yeah its not yellow its "YELLOW"..... LOL Im in the Chermside/Aspley area...