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Discussion Starter #1
Since the search function is still down, I gotta make a post for this.

I'm running a BLt67 single kit. What kind of spark plugs are recommanded and what gap should I run them? Thanks.
 

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200+mph
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i use NGK 3330´s. The gap depends on how much boost you are running. Mine are gapped at .028" on pump gas 18 psi
 

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Discussion Starter #4
I'm thinking of running 18psi on pump and i guess around 28psi on race gas. Are the ngk3330's suitable for my applications?

Also, should I replace the plugs more frequently on a single turbo car than my bpu car? Thanks.
 

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Supra Owner Since 1996
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NGK 6097's gapped from .021 to .024 on my 67mm.
 

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Discussion Starter #6
aren't the 6079's for BPU supras? I think that's what im running in my bpu right now.
 

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I'd recommend running Iridium plugs. I ran IK22's on 18 psi all day long no problem. I occasionally ran 22-25psi, and it held fine.

Contact drift tt23 (is that his username?) about obtaining the Denso IK plugs.
 

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I run NGK 3330's. I run a gap for of .026 to .028 for 18 psi or 27 psi.

I always change my spark plugs every oil change (so every 2k milles) ;)
 

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Supra Owner Since 1996
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the 6097 and 3330's are the optimal plug to run in BPU to small APU Supras. (Heat range of 7, one colder then stock.) The amount of gap you run is determined by your boost level, engine managment, and ignition amplification. I run the 6097's because I can't get 3330's locally.

On stock ECU I ran 6097's gapped to .021 to not blow out spark.

Now with AEM, requires a HKS DLI ignition amp if you want to run past 16 psi due to wasted spark. I have the plugs gapped from .022 - .024" Cheap plugs are still the best.
 

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the 6097 and 3330's are the optimal plug to run in BPU to small APU Supras. (Heat range of 7, one colder then stock.) The amount of gap you run is determined by your boost level, engine managment, and ignition amplification. I run the 6097's because I can't get 3330's locally.

On stock ECU I ran 6097's gapped to .021 to not blow out spark.

Now with AEM, requires a HKS DLI ignition amp if you want to run past 16 psi due to wasted spark. I have the plugs gapped from .022 - .024" Cheap plugs are still the best.
You need new coil packs. I run IK27s 0.030 gap on 74-GTS on AEM & DLI @ 28psi with no miss.
 

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Supra Owner Since 1996
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You need new coil packs. I run IK27s 0.030 gap on 74-GTS on AEM & DLI @ 28psi with no miss.
The Iridiums are different. You don't want to gap them due to damaging the electrode. Is this at all boost levels?
 

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this comparison has been around a long time, pointing out the differences between the 3330's and 6097's http://mkiv.com/tmp/6097/ ...though obviously people have made them both work well. I've only used the 6097's at BPU and they worked great for me so I didn't look further. Now that I went single, I've been running on NGK Iridiums BKR7E1X11 for a few months, they work great so far ...but thru Monarch they cost 4X what the 6097's cost.
 

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The Iridiums are different. You don't want to gap them due to damaging the electrode. Is this at all boost levels?
From what I see if you don't plan to run above 30 psi (upto 76-GTS) stick with Iridiums, you don't have to constantly change them and they last. The Denso Iridium IK24s and the NGK Iridium 8s are very good choices.

My friend was running 0.30 gap on the NGK Iridium 8 and was getting spark blow out @ 25psi, so we experimented and I let him borrow my coil packs and he ran 30psi at the same gap and got ZERO spark blow out.

If any of you guys have to gap your plugs below 0.28 under 30psi boost get new coil packs.
 

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I'm running the NGK 3330s on a 61 Turbo and they have been great. Granted I have been running pump gas not going further then 18 or 19psi, still no misfire or hesitation.
 
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