anti-det. device query. . .
#1
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anti-det. device query. . .
i was just thinking about the new release of this anti-det. device thingy/plug.
lets put aside all the lies/rumor/b.s. that we as knowledgable people have had to deal with for the past several months regarding the development and mystery of this "glorious" product. i was talking to a good friend of mine (who happens to be very knowledgable with rx-7s and most anything automotive) about how this might work. he said, "when 1st gens were the racers choice (meaning, what was available as far as rx7s go), running ONLY leading sparkplugs was ideal because of the use of carburetors and the difference in the generations altogether." he had heard that by taking the trailing plugs away from a 3rd gen you would lose "25% peak horsepower". this lead him to believe that there was some kind of a design change in the engine as well as a change in the use of the trailing plugs. yes, they do help with emissions, but they mustve developed some sort of use for the trailing plugs due to the oddly shaped combustion chamber. . . the way the rotor moves. . . and that leads to the way the flame front moves. its obvious that there is SOME reason we have two plugs per rotor on all of our generations in the states.
our conversation developed into me telling him what this product does. i told him that it allows more boost to be introduced, lower octane levels on fuels to be ingested, and lower afrs. i also told him that there MAY be consequences for this product. . . which are. . . HEAT!!!! THE MAIN KILLER OF ROTARY ENGINES. . . most everyone knows this. its not detonation. . . why??? cause the tuners have FIGURED OUT how to get around that. heat is why most turbo rotary owners know about turbo efficiency levels, radiator upgrades, radiator hose upgrades, coolant temp gauges, fan mods, new fans, evans npg, radiator ducting, etc. . . just to name a few. this raised my question of WORTH of this product. why on earth would anybody want to perform a mod that would SIGNIFICANTLY RAISE temperature levels inside their rotary engine? the obvious answer that they have given us is that you can run more boost with this mod. well, to any average joe schmoe that means more horsepower!!!! WOOHOO!!!!! evidently, this is wrong. the cars with this product are having to run more boost to reach the horsepower that they were prior to having the mod (if they were tuned correctly at that time).
so what IS the advantage to running this mod? so far i know that i can run lower octane (big whoop), higher boost levels, and lower AFR's. . . and the GRAND PRIZE for doing so is. . . the greater chance of squashing rotorfaces and overheating the engine. . . it sounds to me like this devices name needs to be changed from the "anti-detonation device" to the "glorified engine replacement" mod.
so. . . to the makers. . . WHAT IS THE GAIN? there is too much hoopla about a product that has no proof of worth to the "betterment" of the rotary community. i dont see why i would care to install something on my car that is gonna FORCE me to run my car harder to reach the level of performance it was at PRIOR to the mod?
again, WHAT. . . IS. . . THE. . . GAIN?
paul
p.s. does anybody else feel cheated?
lets put aside all the lies/rumor/b.s. that we as knowledgable people have had to deal with for the past several months regarding the development and mystery of this "glorious" product. i was talking to a good friend of mine (who happens to be very knowledgable with rx-7s and most anything automotive) about how this might work. he said, "when 1st gens were the racers choice (meaning, what was available as far as rx7s go), running ONLY leading sparkplugs was ideal because of the use of carburetors and the difference in the generations altogether." he had heard that by taking the trailing plugs away from a 3rd gen you would lose "25% peak horsepower". this lead him to believe that there was some kind of a design change in the engine as well as a change in the use of the trailing plugs. yes, they do help with emissions, but they mustve developed some sort of use for the trailing plugs due to the oddly shaped combustion chamber. . . the way the rotor moves. . . and that leads to the way the flame front moves. its obvious that there is SOME reason we have two plugs per rotor on all of our generations in the states.
our conversation developed into me telling him what this product does. i told him that it allows more boost to be introduced, lower octane levels on fuels to be ingested, and lower afrs. i also told him that there MAY be consequences for this product. . . which are. . . HEAT!!!! THE MAIN KILLER OF ROTARY ENGINES. . . most everyone knows this. its not detonation. . . why??? cause the tuners have FIGURED OUT how to get around that. heat is why most turbo rotary owners know about turbo efficiency levels, radiator upgrades, radiator hose upgrades, coolant temp gauges, fan mods, new fans, evans npg, radiator ducting, etc. . . just to name a few. this raised my question of WORTH of this product. why on earth would anybody want to perform a mod that would SIGNIFICANTLY RAISE temperature levels inside their rotary engine? the obvious answer that they have given us is that you can run more boost with this mod. well, to any average joe schmoe that means more horsepower!!!! WOOHOO!!!!! evidently, this is wrong. the cars with this product are having to run more boost to reach the horsepower that they were prior to having the mod (if they were tuned correctly at that time).
so what IS the advantage to running this mod? so far i know that i can run lower octane (big whoop), higher boost levels, and lower AFR's. . . and the GRAND PRIZE for doing so is. . . the greater chance of squashing rotorfaces and overheating the engine. . . it sounds to me like this devices name needs to be changed from the "anti-detonation device" to the "glorified engine replacement" mod.
so. . . to the makers. . . WHAT IS THE GAIN? there is too much hoopla about a product that has no proof of worth to the "betterment" of the rotary community. i dont see why i would care to install something on my car that is gonna FORCE me to run my car harder to reach the level of performance it was at PRIOR to the mod?
again, WHAT. . . IS. . . THE. . . GAIN?
paul
p.s. does anybody else feel cheated?
#2
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Well the device its self will not generate more heat it is the lower afr's. I havent figured out if i like the product yet. . Where i live they have em. laws so if this would make me fail i would not buy this product.
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You bring up many good points. After all, how many people suffer blown apex seals vs bad coolant seals? Water injection costs less than the anti-det "device" and lowers combustion temps and reduces the chances of detonation. Hmm.....
Not only that, but consider drivability and fuel mileage decreases. Also, who's tuning the PFC to work with the device.....
Not only that, but consider drivability and fuel mileage decreases. Also, who's tuning the PFC to work with the device.....
#4
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Originally posted by DjRannyKan
Well the device its self will not generate more heat it is the lower afr's. I havent figured out if i like the product yet. . Where i live they have em. laws so if this would make me fail i would not buy this product.
Well the device its self will not generate more heat it is the lower afr's. I havent figured out if i like the product yet. . Where i live they have em. laws so if this would make me fail i would not buy this product.
paul
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Originally posted by rotorbrain
it IS the device. . . the reason: in order to run this device you HAVE to run lower afrs. . . if you didnt. . . it would just flood out the engine. . . not enough spark. this brings me to another point. the reason that they talk about running lower octane fuels is (my own personal reasoning) because of the faster burn of 87 and such. maybe the different type of ignition timing is the reason or the fact that there is only one spark plug doing the work that normally takes two is part of it. maybe by running lower octane fuels they can effectively burn more fuel with this device.
paul
it IS the device. . . the reason: in order to run this device you HAVE to run lower afrs. . . if you didnt. . . it would just flood out the engine. . . not enough spark. this brings me to another point. the reason that they talk about running lower octane fuels is (my own personal reasoning) because of the faster burn of 87 and such. maybe the different type of ignition timing is the reason or the fact that there is only one spark plug doing the work that normally takes two is part of it. maybe by running lower octane fuels they can effectively burn more fuel with this device.
paul
ahh.. i must have missunderstud the device then. it makes more sence now, thats for telling me that about not enought spark and disregard me last post. (spelling is horrable.)
#6
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Originally posted by rynberg
You bring up many good points. After all, how many people suffer blown apex seals vs bad coolant seals? Water injection costs less than the anti-det "device" and lowers combustion temps and reduces the chances of detonation. Hmm.....
Not only that, but consider drivability and fuel mileage decreases. Also, who's tuning the PFC to work with the device.....
You bring up many good points. After all, how many people suffer blown apex seals vs bad coolant seals? Water injection costs less than the anti-det "device" and lowers combustion temps and reduces the chances of detonation. Hmm.....
Not only that, but consider drivability and fuel mileage decreases. Also, who's tuning the PFC to work with the device.....
~Luke
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Luke,
I can't say everything that I may know (oh no, now I sound like Batman ). I strongly suggest you simply unplug your trailing coils -- IT DOES THE EXACT SAME THING. Unplug them as a test for a week and check your drivability, low-end power, and gas mileage. You may find that you don't want to spend $150.
I can't say everything that I may know (oh no, now I sound like Batman ). I strongly suggest you simply unplug your trailing coils -- IT DOES THE EXACT SAME THING. Unplug them as a test for a week and check your drivability, low-end power, and gas mileage. You may find that you don't want to spend $150.
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#8
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Originally posted by rynberg
Luke,
I can't say everything that I may know (oh no, now I sound like Batman ). I strongly suggest you simply unplug your trailing coils -- IT DOES THE EXACT SAME THING. Unplug them as a test for a week and check your drivability, low-end power, and gas mileage. You may find that you don't want to spend $150.
Luke,
I can't say everything that I may know (oh no, now I sound like Batman ). I strongly suggest you simply unplug your trailing coils -- IT DOES THE EXACT SAME THING. Unplug them as a test for a week and check your drivability, low-end power, and gas mileage. You may find that you don't want to spend $150.
Jason
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Originally posted by Jason
Just unplugging stuff is not going to work. If you are running a Power FC there are other changes that need to be made.
Jason
Just unplugging stuff is not going to work. If you are running a Power FC there are other changes that need to be made.
Jason
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steve kan told me the same thing today on the phone in regards to unplugging the trailing coils...he also said we might as well just to run a realllly wide split.
there is no substitute for great tuning...as we all know.
personally, I just went with water injection. Tuning is Friday. I would be smart, I feel, to go with proven methods when I have spent so much money.
as far as avoiding costs for water injection....i think we have all learned that ya get what you pay for and that you cant skimp on doing things right when it comes to this vehicle.
there is no substitute for great tuning...as we all know.
personally, I just went with water injection. Tuning is Friday. I would be smart, I feel, to go with proven methods when I have spent so much money.
as far as avoiding costs for water injection....i think we have all learned that ya get what you pay for and that you cant skimp on doing things right when it comes to this vehicle.
#12
Just an FYI, the speed of the "flame front" is essentially identical in all automotive fuels. Octane is a measure of resistance to preignition, nothing else. What you might be thinking of is the distillation curve, how evenly the fuel evaporates. Race gas tends to have a very smooth curve missing some of the lighter elements, meaning even portions of the fuel tend to evaporate over the total range of evaporation instead of peaky spurts found in cheaper gas.
On a side note I must say how well my lawn mower and snow blower run on VP C16. I had a half full 55gal drum when I last had the car out that I've been burning up in my yard equipment : )
Kevin T. Wyum
On a side note I must say how well my lawn mower and snow blower run on VP C16. I had a half full 55gal drum when I last had the car out that I've been burning up in my yard equipment : )
Kevin T. Wyum
Originally posted by rotorbrain
it IS the device. . . the reason: in order to run this device you HAVE to run lower afrs. . . if you didnt. . . it would just flood out the engine. . . not enough spark. this brings me to another point. the reason that they talk about running lower octane fuels is (my own personal reasoning) because of the faster burn of 87 and such. maybe the different type of ignition timing is the reason or the fact that there is only one spark plug doing the work that normally takes two is part of it. maybe by running lower octane fuels they can effectively burn more fuel with this device.
paul
it IS the device. . . the reason: in order to run this device you HAVE to run lower afrs. . . if you didnt. . . it would just flood out the engine. . . not enough spark. this brings me to another point. the reason that they talk about running lower octane fuels is (my own personal reasoning) because of the faster burn of 87 and such. maybe the different type of ignition timing is the reason or the fact that there is only one spark plug doing the work that normally takes two is part of it. maybe by running lower octane fuels they can effectively burn more fuel with this device.
paul
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It would be great if Steve Kan or someone who has nothing to gain financially from this product would do a technical write up and test of the product. I agree with Paul, all the hype and for what?
Last edited by cpa7man; 06-07-04 at 08:47 PM.
#14
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It seams that detonation is no longer the enemy that it once was when people were first learning how to tune and mod these cars. If someone wants a xxx hp rx7 (within reason), there are time proven mods that can get you there. With the proper tuning there should be little fear of detonation. In terms of my engine failing, I fear coolant seals failing, or just wearing down the apex seals over time much more than detonation.
My point is that this "device" (aka ripoff. I know... don't go there ) will hopefully offer the possibility of more horspower (leaner afr's) and cheaper gas costs at the same level of reliability as the time proven mods we all use. However, as rotorbrain pointed out, it already seams that there may be significant disadvantages (heat, and loss of power from only one plug per housing) that outweigh the "positives" (that have yet to be proved )
My point is that this "device" (aka ripoff. I know... don't go there ) will hopefully offer the possibility of more horspower (leaner afr's) and cheaper gas costs at the same level of reliability as the time proven mods we all use. However, as rotorbrain pointed out, it already seams that there may be significant disadvantages (heat, and loss of power from only one plug per housing) that outweigh the "positives" (that have yet to be proved )
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Originally posted by cpa7man
It would be great if Steve Kan or someone who has nothing to gain financially from this product would do a technical write up and test of the product. I agree with Paul, all the hype and for what?
It would be great if Steve Kan or someone who has nothing to gain financially from this product would do a technical write up and test of the product. I agree with Paul, all the hype and for what?
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Originally posted by rynberg
Steve's too busy working on cars and tuning to test it, you know, actually doing USEFUL things for the FD community....
Steve's too busy working on cars and tuning to test it, you know, actually doing USEFUL things for the FD community....
#18
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Originally posted by rynberg
Yes, unplugging the trailing coils will do the EXACT same thing as installing those plugs. And I'm well aware that changes need to be made in the PFC...but that info isn't being provided. There's a reason KD Rotary charges what they do to install this "device", folks, it's called tuning.
Yes, unplugging the trailing coils will do the EXACT same thing as installing those plugs. And I'm well aware that changes need to be made in the PFC...but that info isn't being provided. There's a reason KD Rotary charges what they do to install this "device", folks, it's called tuning.
Jason
#19
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Originally posted by Kevin T. Wyum
Just an FYI, the speed of the "flame front" is essentially identical in all automotive fuels.
Kevin T. Wyum
Just an FYI, the speed of the "flame front" is essentially identical in all automotive fuels.
Kevin T. Wyum
#20
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Originally posted by Kevin T. Wyum
Octane is a measure of resistance to preignition, nothing else.
Octane is a measure of resistance to preignition, nothing else.
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Originally posted by rynberg
Luke,
I can't say everything that I may know (oh no, now I sound like Batman ). I strongly suggest you simply unplug your trailing coils -- IT DOES THE EXACT SAME THING. Unplug them as a test for a week and check your drivability, low-end power, and gas mileage. You may find that you don't want to spend $150.
Luke,
I can't say everything that I may know (oh no, now I sound like Batman ). I strongly suggest you simply unplug your trailing coils -- IT DOES THE EXACT SAME THING. Unplug them as a test for a week and check your drivability, low-end power, and gas mileage. You may find that you don't want to spend $150.
~Luke
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Originally posted by zkeller
The lower Octane should increase the torque numbers also, and keep the engine cleaner.
The lower Octane should increase the torque numbers also, and keep the engine cleaner.
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Its possible that the egt's are just higher due to all the fuel not burning properly and it burning in the dp. Similar to what would happen is you retarded the crap out of your timing and didnt burn all the fuel.
STEPHEN
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