in SD using low octane, how does this effect KR?

Reply Subscribe

Thread Tools

Search this Thread

Apr 12, 2005 | 08:05 PM

WS6FirebirdTA00

Thread Starter

TECH Senior Member

iTrader: (33)

Joined: Mar 2003

Posts: 8,319

Likes: 1

From: North Carolina

in SD using low octane, how does this effect KR?

so if i have the low and high octane tables the same and keep the car in SD the high and low are the same. so how does the car pull any KR? and the right amount?

Apr 12, 2005 | 09:20 PM

Another_User

TECH Addict

Joined: Feb 2004

Posts: 2,826

Likes: 0

Quote:

Originally Posted by WS6FirebirdTA00

so if i have the low and high octane tables the same and keep the car in SD the high and low are the same. so how does the car pull any KR? and the right amount?

It still pulls timing based on the KR tables, just none of the timing "sticks" because as the PCM shifts towards the low octane table as the knock value for shifting between tables changes, both tables are the same, so there is no effect. So, yes, timing gets pulled, but none of the timing changes stay after the knock goes away. It is fine as long as you are not seeing significant amounts of real knock.