How KDR anti-det works, or cheap and easy anti- kaboom for Mazda rotary.
10-10-03, 02:21 PM
#1
How KDR anti-det works, or cheap and easy anti- kaboom for Mazda rotary.
So no one gets mad at anyone- There was no leak, I just read and try to think like everone else kept in the dark.
This post is 100% speculation based on my thoughts
The small KDR "black box" intercepts the leading ignition ignitor signal and can "cut" it when desired or let it pass to the ignitor.
The black box has leads that splice into the trailing coils low voltage side for getting an ions sense signal as the trailing coil fires.
When the ion sense signal indicates detonation possibility it cuts leading ignitor signal.
To get a decent ion sense of the combustion chamber KDR rolls the engine rotor being worked on to TDC and degreases the combustion chamber. They drill out the trailing plug "shrouding" w/ correct speed and pressure for a good "curl" (chips lost in combustion chamber could "wedge" a seal). They debur the edge and re-lube the combustion chamber.
They dyno and tune for a rotary "on the edge of detonation" w/ fewer worries of detonation than from the factory.
For a better ion sense system one would naturally want to use both the leading and trailing spark plugs for sensing to better map the combustion events and go closed loop w/ multiple sequencial senses for advance/ retard. This will cost a lot for the ion sense system and overtax the stock waste spark dual post leading coil as well as eat leading plugs faster. This is the MONEY system.
KDR's system works well enough to make them a buck and still be pretty damn revolutionary!
I think I want to go back to school for some technical training (BA in Asian History wrenching on TII now for a couple of years)- this is fun!!
This post is 100% speculation based on my thoughts
The small KDR "black box" intercepts the leading ignition ignitor signal and can "cut" it when desired or let it pass to the ignitor.
The black box has leads that splice into the trailing coils low voltage side for getting an ions sense signal as the trailing coil fires.
When the ion sense signal indicates detonation possibility it cuts leading ignitor signal.
To get a decent ion sense of the combustion chamber KDR rolls the engine rotor being worked on to TDC and degreases the combustion chamber. They drill out the trailing plug "shrouding" w/ correct speed and pressure for a good "curl" (chips lost in combustion chamber could "wedge" a seal). They debur the edge and re-lube the combustion chamber.
They dyno and tune for a rotary "on the edge of detonation" w/ fewer worries of detonation than from the factory.
For a better ion sense system one would naturally want to use both the leading and trailing spark plugs for sensing to better map the combustion events and go closed loop w/ multiple sequencial senses for advance/ retard. This will cost a lot for the ion sense system and overtax the stock waste spark dual post leading coil as well as eat leading plugs faster. This is the MONEY system.
KDR's system works well enough to make them a buck and still be pretty damn revolutionary!
I think I want to go back to school for some technical training (BA in Asian History wrenching on TII now for a couple of years)- this is fun!!
10-10-03, 05:06 PM
#4
I don't know how KD's device works but I know enough to be pretty sure that that is not what they are doing.
OK, someone tell Skip to start working on "my device" then.
Actually "my device" would be the more sophisticated/ expensive variants of ion sense ignition. It was hard for me to think like a businessperson and come up w/ the way KDR is doing it...
OK, someone tell Skip to start working on "my device" then.
Actually "my device" would be the more sophisticated/ expensive variants of ion sense ignition. It was hard for me to think like a businessperson and come up w/ the way KDR is doing it...
10-10-03, 05:20 PM
#5
Eye In The Sky
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"They drill out the trailing plug "shrouding" "
If they did this the engine would not run. Ever wonder why the shrould hole is about 2 mm. The size of the apex seal to prevent hot gases from the preceding chamber from entering the next. The little blowby with this 2mm hole is safe. Make it bigger and the blowby will ignite the next charge(pre-detonation).
If they did this the engine would not run. Ever wonder why the shrould hole is about 2 mm. The size of the apex seal to prevent hot gases from the preceding chamber from entering the next. The little blowby with this 2mm hole is safe. Make it bigger and the blowby will ignite the next charge(pre-detonation).
10-11-03, 10:54 PM
#6
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this is a little off topic, but if you can run like 15-16lbs of boost on 87 octane with this KDR device ...couldnt u also tune for performance and run like 25lbs of boost on 93 octane?
-Zach
-Zach
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10-13-03, 10:08 AM
#10
Lives on the Forum
Originally posted by cewrx7r1
"They drill out the trailing plug "shrouding" "
If they did this the engine would not run. Ever wonder why the shrould hole is about 2 mm. The size of the apex seal to prevent hot gases from the preceding chamber from entering the next. The little blowby with this 2mm hole is safe. Make it bigger and the blowby will ignite the next charge(pre-detonation).
"They drill out the trailing plug "shrouding" "
If they did this the engine would not run. Ever wonder why the shrould hole is about 2 mm. The size of the apex seal to prevent hot gases from the preceding chamber from entering the next. The little blowby with this 2mm hole is safe. Make it bigger and the blowby will ignite the next charge(pre-detonation).
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