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I have tested and it confirm works. I side gap a set of copper autolite plugs (they are just normal copper plugs), regap them to 0.03 inches and add 1ml of Castrol 2T oil per 1L of petrol (I believe other brands work as well). Previously using Denso Iridium plugs and no 2T, I get a very consistent 7.5KM/L for my car. Tried those expensive Nology plugs, slightly better to 7.8KM/L. Now with 2T oil and side gapping of copper plugs, I get 8.1KM/L, its a big increase over my iridium plugs considering iridium is supposed to give you better FC. However, do take note that side gapping also requires a higher voltage to fire the spark. My MSD coil misfires at around 3-4K RPM. I modded my Mallory coil to reduce the no. of wounds on the primary coil (to increase secondary:primary ratio) hence producing a slightly higher voltage. It works and misfiring issue is solved.

anybody know where I can get tools to gap my spark plugs? thank you many many

http://www.sr20-forum.com/naturally-aspira...park-plugs.html Check out the 1st post. Its very old skool stuff but its tried and tested and proven. You get free ponies for nothing. Btw, I finally decided to side gap my plugs as well. Its Denso Iridium plugs. I didn't take any pics because pictorial instructions are already widely available. I don't have an electric tool so use a micro file and file down the ground electrode. Told me almost 1 1/2hrs for 4 plugs. Tiring man..... After I file down the electrode. I chamfer and sand all the sharp edges in order to prevent any hot spots. Important esp. for Turbo engines. Don't want any risk of detonation. After that, just regap the plug to 0.35mm. Gapping tool bought from autobacs. What I can say is SHIOK! Idle is smoother. Low end is better and engine vibrate less esp. when you are dragging it. I can now change to 5th gear at 50KM/H. Previously need 60 else no power and engine will vibrate alot. Didn't test much of high end but I don't think I can feel that few extra HP. This mod will certain improve my FC since I can shift gears at lower RPM.

Just wanna share this with you. Works for me and my $2/pc BPR6ES-11. http://performanceunlimited.com/documents/...idegapping.html

I just realized that a set of NGK Iridium spark plugs which I have bought previously had a gapping of 1.1mm. However, according to my ride's manual, the spark plugs which requires had a gapping of only 0.9mm. The question is:- Q1. Can anyone enlighten me about whether Iridium plugs are able to re-gap? Q2. Is the process of re-gapping difficult?or every mechanic should know how to do it? Q3. Is it advisable to continue using spark plugs with a larger gapping, for instance 1.1mm, as compared to the specs of 0.9mm? Any side issues?

OK I had these PZFR6 since my car hit 12,000km. Now I have covered 77,000km. I recently bought a spark plug gap tool from Ariestools courtesy of Yeobh who runs the outfit on eBay.sg I have not gapped these plugs before taking for granted they are pre-gapped as they should be. They are from Vtim and I got them for steal at $4/plug and they are double platinum plugs. Results are as follows: Plug 1: 0.1mm under gapped Plug 2: 0.1mm under gapped Plug 3: 0.1mm over gapped Plug 4: 0.1mm over gapped Corrected them already to my engine's requirement which is 1.1mm gap. Now since these are double platinum plugs, I doubt they have worn so much to be 0.1mm over gapped in plugs 3 and 4 because plugs 1 and 2 are under-gapped. Chances are that they are already over and under gapped when they were installed. My advice to DIYers. Check your plug's gapping before installing them. Even though the ignition systems' of todays cars are powerful sporting COP and DIS, keeping them properly gapped will see better performance. PS: I don't have a picture of the plugs but the sides from the platinum tip has worn off except for the platinum tip. So the tip has a "fine iridium" conical tip look to it now compared to when I first had them with the flat tops.

Could someone enlighten me on the above mentioned. If this is done to save the plugs and extend their lives, why not simply just change new ones at new oil intervals?