Bosch Fusion plugs
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Bosch Fusion plugs
Hello everyone i just changed my plugs last week and a half,and i have to say its the best spark plugs so far.The car feels like it has 30% more power.We tested on four cars 3 different makers-2Mercedes,Nissan,Porsche.Everyone agreed on the result.Please let me know what you guys think.Thanks
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Hi Ryan,
Do share on the GTS plugs.
Roger
Do share on the GTS plugs.
Roger
__________________
Does it have the "Do It Yourself" manual transmission, or the superior "Fully Equipped by Porsche" Automatic Transmission? George Layton March 2014
928 Owners are ".....a secret sect of quietly assured Porsche pragmatists who in near anonymity appreciate the prodigious, easy going prowess of the 928."
Does it have the "Do It Yourself" manual transmission, or the superior "Fully Equipped by Porsche" Automatic Transmission? George Layton March 2014
928 Owners are ".....a secret sect of quietly assured Porsche pragmatists who in near anonymity appreciate the prodigious, easy going prowess of the 928."
#6
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30% more power? Um....you do realize that is 90hp on most 928's.
Bosch Fusion = Platinum + iridium all in one plug. Since I will never run a plug of either material, mixing them together doesn't seam any better.
I use WR7DC, I'm not sure what the "T" is for.....edit - ah, triple electrode otherwise the same. I'm not a fan of multi electrode plugs since it's tricky to gap them.
Unless you spend a lot of time sitting stopped in traffic - go with the 6's.
The colder the plug, less chance of detonation. Hotter plugs are only necessary for emissions.
Spark plug rule of thumb - run the coldest plug you can without fouling. I've been running 6's in my 81 for three years now (stock is 8). No issues. I'll be installing 5's very soon (or a different racing plug)
Platinum plugs have one advantage over copper, longevity (same for multi point). So if changing your plugs every 10,000 or so miles is real hassle, go with the platinum.
I've "fixed" quite a few cars by throwing away the "fancy" plugs in exchange for good old copper.
The plugs I might install next are non-projected electrode NGK plugs (still copper). The 4-banger turbo crowd swears by these plugs (700+whp out of 2.2 liters in a street car) Here is a comparison pic, Todd has been running these in his motor for a few years:
Bosch Fusion = Platinum + iridium all in one plug. Since I will never run a plug of either material, mixing them together doesn't seam any better.
Unless you spend a lot of time sitting stopped in traffic - go with the 6's.
The colder the plug, less chance of detonation. Hotter plugs are only necessary for emissions.
Spark plug rule of thumb - run the coldest plug you can without fouling. I've been running 6's in my 81 for three years now (stock is 8). No issues. I'll be installing 5's very soon (or a different racing plug)
Platinum plugs have one advantage over copper, longevity (same for multi point). So if changing your plugs every 10,000 or so miles is real hassle, go with the platinum.
I've "fixed" quite a few cars by throwing away the "fancy" plugs in exchange for good old copper.
The plugs I might install next are non-projected electrode NGK plugs (still copper). The 4-banger turbo crowd swears by these plugs (700+whp out of 2.2 liters in a street car) Here is a comparison pic, Todd has been running these in his motor for a few years:
Last edited by hacker-pschorr; 04-12-2008 at 06:10 AM.
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#9
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Unless you spend a lot of time sitting stopped in traffic - go with the 6's.
The colder the plug, less chance of detonation. Hotter plugs are only necessary for emissions.
Spark plug rule of thumb - run the coldest plug you can without fouling. I've been running 6's in my 81 for three years now (stock is 8). No issues. I'll be installing 5's very soon
The colder the plug, less chance of detonation. Hotter plugs are only necessary for emissions.
Spark plug rule of thumb - run the coldest plug you can without fouling. I've been running 6's in my 81 for three years now (stock is 8). No issues. I'll be installing 5's very soon
Even with a colder thermostat, my 5's are always clean in my '86. I have 6's in my '81.
Fouling is a non-issue with electronic fuel injection systems which have an oxygen sensor. On engines with a knock sensor, you'll lose less power from knock retard with a colder plug.
#10
The only thing that seems important is to make sure its a spark plug with an un-obstructed spark arc - meaning the spark goes across, laterally instead of the usual manner
#11
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IMHO, any 32V can run 5's (WR5DC) and stay clean, unless there is a sensor/fuel injector problem.
Even with a colder thermostat, my 5's are always clean in my '86. I have 6's in my '81.
Fouling is a non-issue with electronic fuel injection systems which have an oxygen sensor. On engines with a knock sensor, you'll lose less power from knock retard with a colder plug.
Even with a colder thermostat, my 5's are always clean in my '86. I have 6's in my '81.
Fouling is a non-issue with electronic fuel injection systems which have an oxygen sensor. On engines with a knock sensor, you'll lose less power from knock retard with a colder plug.
I guess if you are caught in grid lock on a regular basis with your 928 on cold days, it could become an issue.
6's were installed in Shane's new car, I'm sure you will swap in some 5's
#12
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Non-projected tip might be a different story. WR5DC is the coldest Bosch projected. The next step is WR5C = non-projected. They say the projected tip is better for spark kernal placement, but they say a lot of things that don't really turn out to be true.
Once the engine is up to temp, the combustion chamber doesn't know if it's cold outside. Sitting in traffic, air is normally being pulled in after passing over (through) the radiator, and the intake is nice and warm.
Shane's car will obviously need some PK'ing to reach it's full potential.
Once the engine is up to temp, the combustion chamber doesn't know if it's cold outside. Sitting in traffic, air is normally being pulled in after passing over (through) the radiator, and the intake is nice and warm.
Shane's car will obviously need some PK'ing to reach it's full potential.
#13
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Wait until you see the custom one-off (so far) intercooler Todd made
#14
has anyone ever tried silver plugs?
In theory, these seem to have superior potential. Properties of metals for both electrical conductivity and heat are, from best to next are: Silver, Copper, Gold, Aluminum, Platinum. Platinum is actually not a very good conductor of electricity but it resists corrosion and heat well.
_Allen in Allentown, PA
In theory, these seem to have superior potential. Properties of metals for both electrical conductivity and heat are, from best to next are: Silver, Copper, Gold, Aluminum, Platinum. Platinum is actually not a very good conductor of electricity but it resists corrosion and heat well.
_Allen in Allentown, PA
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Bosch fusion plugs
I had bosch plat4-before the changed-they looked clean,several looked brownish.Then i read the thread using ngk v-plugs-the ngk made the car works harder-pressing the gas pedal more.Had them in 2 weeks yanked them out to try the bosch plat4 fusion- the power band is instant at every level going to turn at 60mph to 80mph effortless without floring the darn pedal as before.At straight away the car runs without feeling sluggish.Race a Nissan 300z the other night doing 130+ as he was 3 or 4 car lenght back trying to catch up.I hope one member try them out and see.