How much detonation?
#1
How much detonation?
Ok let the talk begin. I am relatively new to the FI world. I am running the Pettit kit with their flash. I have been running this car for about 4 yrs---usual mods before now. Many miles on the track
I am learning as this is my 1st rotary car.
So some questions i would like to throw out since i will now be taking my FI rotary onto the track soon.
1- what does detonation sound like in a rotary-- i know pre ignition /detonation in the recip but not the rotary .
2- does the rotary survive episodes of detonation. Or does any mean rebuild time.
3- in recips the higher the rpm the less likely detonation will occur (without some type of malfunction of course)--is this also true for the rotary?
4- Is our knock sensor sensitive enough?
5- what are some of the most common causes of detonation in the rotary? bad coild cause detonation or just misfires?
Easy on me please--I admit i am learning.
oscd
I am learning as this is my 1st rotary car.
So some questions i would like to throw out since i will now be taking my FI rotary onto the track soon.
1- what does detonation sound like in a rotary-- i know pre ignition /detonation in the recip but not the rotary .
2- does the rotary survive episodes of detonation. Or does any mean rebuild time.
3- in recips the higher the rpm the less likely detonation will occur (without some type of malfunction of course)--is this also true for the rotary?
4- Is our knock sensor sensitive enough?
5- what are some of the most common causes of detonation in the rotary? bad coild cause detonation or just misfires?
Easy on me please--I admit i am learning.
oscd
#3
Zoom-Freakin'-Zoom
iTrader: (5)
Ok let the talk begin. I am relatively new to the FI world. I am running the Pettit kit with their flash. I have been running this car for about 4 yrs---usual mods before now. Many miles on the track
I am learning as this is my 1st rotary car.
So some questions i would like to throw out since i will now be taking my FI rotary onto the track soon.
1- what does detonation sound like in a rotary-- i know pre ignition /detonation in the recip but not the rotary .popcorn popping or marbles in a can, sound seems to come from right behind the ashtray
2- does the rotary survive episodes of detonation. Or does any mean rebuild time.
no it does not, not with the pressures you are dealing with
3- in recips the higher the rpm the less likely detonation will occur (without some type of malfunction of course)--is this also true for the rotary?good ?
4- Is our knock sensor sensitive enough?
no it is not
5- what are some of the most common causes of detonation in the rotary? bad coild cause detonation or just misfires?gas quality, not strong enough spark
Easy on me please--I admit i am learning.
oscd
I am learning as this is my 1st rotary car.
So some questions i would like to throw out since i will now be taking my FI rotary onto the track soon.
1- what does detonation sound like in a rotary-- i know pre ignition /detonation in the recip but not the rotary .popcorn popping or marbles in a can, sound seems to come from right behind the ashtray
2- does the rotary survive episodes of detonation. Or does any mean rebuild time.
no it does not, not with the pressures you are dealing with
3- in recips the higher the rpm the less likely detonation will occur (without some type of malfunction of course)--is this also true for the rotary?good ?
4- Is our knock sensor sensitive enough?
no it is not
5- what are some of the most common causes of detonation in the rotary? bad coild cause detonation or just misfires?gas quality, not strong enough spark
Easy on me please--I admit i am learning.
oscd
#7
More like marbles in a can.
Maybe your talking about the "sand in a blender" issue some 8's have at higher RPM's.
http://www.youtube.com/watch?v=bm3NcgTnmRk
#8
13B-RE
iTrader: (1)
Sand in a can? lol
More like marbles in a can.
Maybe your talking about the "sand in a blender" issue some 8's have at higher RPM's.
http://www.youtube.com/watch?v=bm3NcgTnmRk
More like marbles in a can.
Maybe your talking about the "sand in a blender" issue some 8's have at higher RPM's.
http://www.youtube.com/watch?v=bm3NcgTnmRk
Chris
#11
13B-RE
iTrader: (1)
Chris
#16
No means yes
iTrader: (1)
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^ i realize no one would make clips on purpose, but i figured someone might have dyno / tuning video footage where detonation happened to occur...
jeez, pulling no punches tonight
jeez, pulling no punches tonight
#17
Banned
iTrader: (3)
It does become very hard to cause detonation after 7200 RPM.
The knock sensor is completely ineffective.
Really, all you can do is prepare the tune to prevent detonation. Once you experience it, there is nothing you can do about it at that moment. Either you luck out or you don't. Just lift and pray.
Last edited by MazdaManiac; 12-03-2008 at 11:06 AM.
#18
The main issue I think about all the time is my fuel filter clogging ever since I started to premix. The last thing I need is a blown engine.
I have spent many hours reading about the issue and talked with olddragger on the rotary4life forum. It seems I should never let my fuel tank go bellow 1/2 tank and that I should never mix FP60 with premix at the same time.
I really wish our fuel filters could be replaced easily!
I have spent many hours reading about the issue and talked with olddragger on the rotary4life forum. It seems I should never let my fuel tank go bellow 1/2 tank and that I should never mix FP60 with premix at the same time.
I really wish our fuel filters could be replaced easily!
#20
13B-RE
iTrader: (1)
If your coils are bad and one of your leading stops firing while under load, the trailing will fire and you will suffer from a really bad ping(ask me how I know ...). This is the only instance where coils would cause such a thing. Although if this is going to happen you would probably notice the car is misfiring and wouldn't be accelerating it hard anyways....
Chris
Chris
#22
#24
The Professor
My car is pretty loud with just a midpipe, you can really hear the engine coming from the center column. So detonation would be louder than this? How much louder?