what happened to the thread that was here discussing spark plugs for turbo applications? Did it get deleted for some reason? I thought the discussion was just starting to get informative and some good information was coming of it.
spark plug thread (1 Viewer)
- Thread starter NKP Garage
- Start date
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Looks like it got deleted. It was not moved.
- Thread starter
- #3
That's a shame. Wonder why.
I requested it that is why. The thread was hijacked to hell with all sorts of sloppy speculative circular and confusing arguments, and it was impossible to help the audience targeted which was turbo owners in general and Safari System owners in specific, who actually want to follow the manufacturers' suggestions for pure copper plugs. I suggest we all start something greatly more generic so we can talk to all the assorted considerations (electrode material, shape, sharpness, size, heat range etc.) of special plug selections; that would help everyone here instead of the six or so fine folks who actually have the Safari System. Hopefully no harm done. 
- Thread starter
- #5
Whoah, I think you're taking it too personally instead of being open to others input. I'll stay outta that one 
It was at the request of the OP. Sometimes I do wish for a chance to grab some of the information off the thread though...
That said, my recommendation for Spark Plugs in turbo/SC 80's would be exactly in this order:
NGK BKR6EIX - Iridium
NGK BKR6EGP - Platinum
NGK BPR6ET - Triple Copper
Bosch FR6DTC - Triple Copper
I personally don't recommend the copper applications, and only include the better/updated copper plug application for the benefit of satisfying the apparent Safari 'copper plug opinion/recommendation'.
Note: Since these plugs all have a heat range +/-2, they can be used in a stock truck engine as well. Or for a direct interchange to a stock truck application, you could substitute 5 for the 6 in the NGK numbering, and the 7 for the 6 in the Bosch numbering. IIRC II the part number Dan posted up for the MR2 turbo crosses to the Platinum NGK above.
It would appear there is a lot of misunderstanding of how Spark Plug technologies and benefits have progressed since the BKR5EYA Toyota specified for the 1FZFE engine in 1993. I'll put up a more complete post on Spark Plug Tech in the next few days.
Cheers
Scott J
94 FZJ80 Supercharged
BKR6EIX equipped
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Okay, fresh start for this, hopefully its helpful for a few more folks. Not that it is the only one suggestion to follow but Air Power Systems and Safari Turbo Systems (th 4x4 arm of aps) recommend heat ranges of 7 only for the 1FZFE at sub-twelve pounds psi. AGAIN not that it is the only one suggestion to follow but for the purposes of posting one very successful manufacturer's suggestion ... Hope that Helps (HTH)
I am very interested in a multi-point pure copper plug in the right recommended heat range here so if Scott can find such a situation I'd like to learn of it. Thanks.
Edit: It looks like the last two listed are not resistor plugs, is that right?
I am very interested in a multi-point pure copper plug in the right recommended heat range here so if Scott can find such a situation I'd like to learn of it. Thanks.
Edit: It looks like the last two listed are not resistor plugs, is that right?
Whoah, I think you're taking it too personally instead of being open to others input. I'll stay outta that one
Baktasht, I'm trying not to take it too personally, I really am trying not to. These threads are informational archives and that particular thread was written for only one specific thing from the start. We started getting all sorts of other opinions offered about things that had nothing at all to do with what the thread started as. I tried to re-rail what was de-railed but to absolutely no avail. The thread was only intended to help a handful of folks anyway so hopefully no harm done. Let's all just agree please to have a helpful conversation and create a helpful archive here. No worries whatsoever. I admittedly have never ventured very far from the super strict recommendations that APS makes so I am actually eager to engage in a much more generic conversation with "all plugs on the table" so to speak. Thanks.
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Okay, fresh start for this, hopefully its helpful for a few more folks. Not that it is the only one suggestion to follow but Air Power Systems and Safari Turbo Systems (th 4x4 arm of aps) recommend heat ranges of 7 only for the 1FZFE at sub-twelve pounds psi. AGAIN not that it is the only one suggestion to follow but for the purposes of posting one very successful manufacturer's suggestion ... Hope that Helps (HTH)
I am very interested in a multi-point pure copper plug in the right recommended heat range here so if Scott can find such a situation I'd like to learn of it. Thanks.
Edit: It looks like the last two listed are not resistor plugs, is that right?
Sean, I double checked and corrected the 6 series of copper plug applications to reflect resistor-type and 1 colder than stock, sorry I don't use copper apps much anymore. A 5 series Bosch plug crosses to the 7 series NGK. As a rule, I use 5bosch/7NGK at 15+ psi on 2 valve non-crossflow head design turbo cars, and 20+psi on multivalve crossflow head design turbo cars. Summary, IMO/E a 5BSCH/7NGK is a *really* cold plug for a low boost application. Here's the risk in running it.
Cruising down the highway empty, no boost, cruise control on, (ala stock truck) you are outside the stock engine spark plug heat range (5NGK/7Bosch) - you risk losing the self cleaning properties of the plug nose. You claim Safari is apparently 'recommending' a single top gap copper plug of 7NGK/5Bosch heat range. However, the 6NGK/6Bosch plugs have heat ranges of +/-2 by their improved multiple electrode design, so they will outperform the single ground electrode copper, always.
HTH
Scott J
94 FZJ80 Supercharged
BKR6IEX equipped
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Toyo Boyo
SILVER Star
The plug the guru Cruiserdan recommends is........
I recommend the MR2 Turbo plug, 90919-01180. It is one range colder, is platinum and already comes in the proper gap.
from this thread (post #22) https://forum.ih8mud.com/80-series-tech/88793-turbo-build.html
So, in a nut shell, for a simple country boy (me lol) - which plug is the best for a low boost turbo 1FZ??? (coz at the moment my brain is hurting).
I recommend the MR2 Turbo plug, 90919-01180. It is one range colder, is platinum and already comes in the proper gap.
from this thread (post #22) https://forum.ih8mud.com/80-series-tech/88793-turbo-build.html
So, in a nut shell, for a simple country boy (me lol) - which plug is the best for a low boost turbo 1FZ??? (coz at the moment my brain is hurting).
Tapage
Club 4X4 Panamá
X2 and if it's the same ( asuming yes ) for a SC applications .. ?
Then if I can ask another question .. what happend with those NGK and Bosk plugs in a NA stock 1FZ-FE ( if they are coming with the proper gap ? )
thanks for the thread BTW .. coming from the Turbo Diesel world ..
I just double cked Toyota MR2 part number 90919-01180, and it crosses to NGK 6 heat range platinum plug part number I listed in my previous post. So, in a nutshell, either the NGK BKR6EGP platinum or the BKR6EIX iridium would be the recommended. IMO, boost is boost, it's the same SC or turbo. Since both the platinum and the iridium have high heat range tolerances, they can also be used in a stock normally aspirated truck as well. To go direct from the original equipment 1FZFE BKR5EYA (*stock engine - no boost*) to interchange with an improved plug design
NGK BKR5EIX = Iridium stock plug application
NGK BKR5EGP = Platinum stock plug application
NGK BKR5ET = Triple Copper Plug application
BSCH FR7DTC = Trippe Copper Plug application
HTH
Scott J
94 FZJ80 Supercharged
BKR6EIX equipped
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Toyo Boyo
SILVER Star
I prefer Denso over NGK.
Toyota has used a few NGK plugs in the past (during engine assembly) but Denso is the exclusive replacement plug.
Toyota has used a few NGK plugs in the past (during engine assembly) but Denso is the exclusive replacement plug.
Fellas, just remember that the regular platinum plug Dan is inclined to recommend is gapped at .8 mm and technically with turbos at or above 8psi you should gap down to about .6mm due to the approx 100HP added. I don't know if these platinum plugs can be regapped, if they can its no issue, if they can't it isn't ideal to run them with the full .8mm. That isn't inteded to infer it won't work with .8mm just that it isn't ideal. Maybe Dan can clarify if they indeed are regappable?
Scott, thanks for the clarification on the resistor types and the heat ranges; I knew something was off with your nomenclature.
Thanks. Shaun, spelled, Shaun.
Scott, thanks for the clarification on the resistor types and the heat ranges; I knew something was off with your nomenclature.
Thanks. Shaun, spelled, Shaun.
That's like coke vs pepsi product at the drivethru window, what manufacturer won the contract? Audi, Porsche and Mercedes spec OE as NGK iridiums in their newest turbo/SC cars (previously contracted with Bosch). I find both brands to be good quality, NGK's are much easier to find in the aftermarket (IIRC Autozone BKR6EIX on sale were less than my shop wholesale price). The grooved design of the Denso ground electrode as a claimed "advantage" in their iridium series plugs doesn't impress me much, and I generally find Bosch and Denso have a higher incidence of 'bad' plugs from the box.
SJ
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Fellas, just remember that the regular platinum plug Dan is inclined to recommend is gapped at .8 mm and technically with turbos at or above 8psi you should gap down to about .6mm due to the approx 100HP added. I don't know if these platinum plugs can be regapped, if they can its no issue, if they can't it isn't ideal to run them with the full .8mm. That isn't inteded to infer it won't work with .8mm just that it isn't ideal. Maybe Dan can clarify if they indeed are regappable?
Scott, thanks for the clarification on the resistor types and the heat ranges; I knew something was off with your nomenclature.
Thanks. Shaun, spelled, Shaun.
Shaun
I wouldn't touch a platinum gap or an iridium gap. Run it as it is gapped in the package. The 'old' school of reducing gap went with the copper plug. They aren't designed to be gapped/regapped.
The nomenclature is only confused by the fact that a NGK6=Bosch6. Then NGK goes higher in number to go cooler heat range, and Bosch goes lower in number to go cooler in heat range. I prefer the Bosch method of lower number is cooler, as it seems more intuitive.
SJ
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Yes, I totally get that, let me rephrase ... stock plugs should get gapped down due to the extra power produced from FI ... in the case of the Safari System I gap down to .6mm ... what I'm saying is if platinums aren't supposed to get gapped down is there one that is already at .6mm to accomodate all the extra power produced through the turbo. Or, to rephase what you wrote, are you saying that getting gapped down is only important to the pure copper plugs? Thanks.
I would not disagree, which is why I said "I prefer" as opposed to "Denso is better". It was a declaration of personal preference, not a claim of superiority.
Toyota could possibly prefer Denso because they are partnered in lots of ways all over the world and they have no "interest" in NGK.
Tapage
Club 4X4 Panamá
X2 at least down here Denso plugs are almost imposible to find .. looks like next time I will swap to a bosh to give a try ..
How many miles are recomended on those plugs iridium/platinum/tripple copper ..?
