knock count
Thread Starter
Racer
Joined: Aug 2004
Posts: 410
Likes: 8
From: San Antonio TX
I'v read some of your other posts and you seem very knowledgeable on the subject of tuning. I'm using TTS Datamaster for datalogging on my 91 ZR-1. The timing always reflects a 6 degrees deficit from the advance tables. The car runs much better if I put in 6 degrees across the board but I pick up a knock here and there, but not bad..just single knocks at low rpm under load and a single knock during higher rpm under acceleration. The car just feels better with the timing pushed by 6 degrees.
What is your take on this?
Thanks
What is your take on this?
Thanks
Le Mans Master
Joined: Jan 2003
Posts: 8,596
Likes: 19
From: Portland Oregon
Originally Posted by zr1-2go
I'v read some of your other posts and you seem very knowledgeable on the subject of tuning. I'm using TTS Datamaster for datalogging on my 91 ZR-1. The timing always reflects a 6 degrees deficit from the advance tables. The car runs much better if I put in 6 degrees across the board but I pick up a knock here and there, but not bad..just single knocks at low rpm under load and a single knock during higher rpm under acceleration. The car just feels better with the timing pushed by 6 degrees.
What is your take on this?
Thanks
What is your take on this?
Thanks
If you are seeing knock counts but not any actual knock retard, I wouldn't worry about it. If you have headers, that seems to have some affect on KR in they way it makes the engine more susceptable to KR. I have not personally seen this, but it was mentioned by a ZR1 tuner far more experienced than myself.
Drifting
Joined: Mar 2005
Posts: 1,923
Likes: 0
From: GA
If you are only getting a knock here and there and the ECM isn't pulling timing then you are probably ok. The thing to do next is to log during some 1/4 mile runs while making small timng adjustments and see how it affects your times. Once you find the "perfect" advance there, make sure it hasn't affected your part throttle knock counts.
