A question of power
Registered User
Joined: Dec 2002
Posts: 1,527
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From: North London
Originally posted by fluffyninja
No problems...............spent 4 years at uni learning this stuff. Nice to be able to put it to use
No problems...............spent 4 years at uni learning this stuff. Nice to be able to put it to use
Joined: May 2001
Posts: 3,332
Likes: 2
From: On a fencepost
Originally posted by Colin Killick
Bloody hell, mind blowing stuff. Is there an argument for using these octane boosters then if you cant get hold of 98? Do they have anything in that can damage the engine?
Bloody hell, mind blowing stuff. Is there an argument for using these octane boosters then if you cant get hold of 98? Do they have anything in that can damage the engine?
Registered User
Joined: Apr 2003
Posts: 14,273
Likes: 2
From: Chester
[QUOTE]Originally posted by bmarshall
[B]
Some partial information here. The F20C ECU does not advance the ignition until it senses knock. It works off the base maps and retards (in a big way) when it senses knock.
Knock, left unchecked, can damage your engine. Once it's retarded because of seeing knock, the F20C ECU will gradually advance ignition until reaches the base map values. But if knock starts again, the ECU just advances till it senses the knock, then retards again. So you end up in a loop of advance a bit, then back off as you start knocking again. There are other effects - the fueling is also setup for high octane fuel. Running lower octane affects the coolant temp and other aspects of the engine behaviour as well.
I'm not trying to pick a fight here, your post has a lot of good info into. But the question was about an S2000 - and the map's/ECU behaviour aren't
[B]
Some partial information here. The F20C ECU does not advance the ignition until it senses knock. It works off the base maps and retards (in a big way) when it senses knock.
Knock, left unchecked, can damage your engine. Once it's retarded because of seeing knock, the F20C ECU will gradually advance ignition until reaches the base map values. But if knock starts again, the ECU just advances till it senses the knock, then retards again. So you end up in a loop of advance a bit, then back off as you start knocking again. There are other effects - the fueling is also setup for high octane fuel. Running lower octane affects the coolant temp and other aspects of the engine behaviour as well.
I'm not trying to pick a fight here, your post has a lot of good info into. But the question was about an S2000 - and the map's/ECU behaviour aren't
Joined: May 2001
Posts: 3,332
Likes: 2
From: On a fencepost
[QUOTE]Originally posted by fluffyninja
[B]
Just for my own understanding though, isn't this essentially what I stated with regards to adjusting timing, the knock sensor adjusts the ignition depending on what it detects (to protect the engine) therefore lower quality fuel would just have performance loss?
[B]
Just for my own understanding though, isn't this essentially what I stated with regards to adjusting timing, the knock sensor adjusts the ignition depending on what it detects (to protect the engine) therefore lower quality fuel would just have performance loss?
