Join Date: Aug 2012
Location: Long Island, NY
Thanked 31 Times in 28 Posts
Seeing more ST knock on stock tune versus diablo tune
Traveled from Long island to Roanoke, VA a couple of days ago; have the Trinity with 93 tune. Normally see no more than 2 degrees of ST knock on the Diablo tune but after getting some gas down here in Roanoke, I noticed the knock go up to around 3 or 4.00.
Started playing around with the fuel settings on the tune to make it richer; didn't help I think it actually made it worse as the knock went upto around 6 at WOT. Then I reflashed back to the stock tune and started watching the knock. It then actually under a WOT 70+ pull the knock went as high as 10.5!! That freaked me out a little bit given it was the stock tune parameters and I was seeing that kind of knock. Could I have gotten bad gas or something? Note I do not have a catch can yet, so maybe after the long trip I could have gotten some oil in the valves?
Another interesting thing is that after seeing what happened on the stock tune I put the 93 tune back on the vehicle but reset the values; so no fuel adjustment, etc. Did a few hard runs where I could and didn't see any ST knock over 1.5 or 2.0. Seems like it was back to normal but just wondering what might have happened or has anyone else seen this?