black00TA

iTrader: (3)

can a banging fuel line in your engine bay cause knock retard?
-thanks

WILWAXU

iTrader: (6)

Sure it's possible..

But most of the line in our engine bay is rubber..

black00TA

iTrader: (3)

im refering to the banging against the heat shield on the drivers side

glen

iTrader: (1)

Knock sensors are triggered by frequency. It's a very narrow band and todays sensor are designed for the engines they are attached to and there location on the engine. It's not by mistake they are located where they are. That said, it is very unlikely anything other than detonation will set it off. Early sensors picked up everything from piston knock to loose rocker arms to solid lifter cams.

Yelo

The cover on the truck intakes WILL set off fasle knock.....it took me and my tuner 3 hours to figure that one out

black00TA

iTrader: (3)

hmmm, well it retards as much as 3.7 degrees. and it happens around the same RPM that the noise is. a lot of people say there LS1's do this, anyone else care to input??

bigpapi211

iTrader: (4)

my ypipe was banging my torque tunnel mount and ended up pulling 15 degrees of timing. so yea anything is possible

9000th01ss

iTrader: (10)

I once (recently) posted five videos of me running my car with HPTuners connected, doing various things like tapping on the top corner of the cylinder head, denting the **** out of the Y pipe with an air hammer right where it hits the floor, and two hard runs shifting through 2nd and 3rd with the Y beating the **** out of the floor, also one low rpm high load test to show KR on the screen. Both the screen and my tests were in view at the same time and nothing caused KR (except for the low rpm high load test, which was 5th gear and increased throttle enough to get one degree)

So....I don't think the Y banging causes KR, and a fuel line sure as hell isn't going to cause it.

bigpapi211

iTrader: (4)

send me these videos

9000th01ss

iTrader: (10)

I had them on youtube, took them down.

What I figure is if you're making enough power to twist the engine up to where the exhaust bangs the floor, the KR is more likely coming from being under high engine load. Or it's torque management pulling it. 15* is a lot for a pipe banging. Pretty much a common number when TM kicks in.

TheSilverOne

iTrader: (22)

yeah i was looking for your thread 9000th and couldn't find it

9000th01ss

iTrader: (10)

Well it's going to take a while to put the stuff back on youtube.
(upload time)
anything specific that would convince someone banging stuff doesn't cause KR?
I'll put that vid up first or make one.
If someone has an idea and wants me to make a video I'll do it. I originally wanted to put one camera under the car to show the pipe hitting (out of my curiosity)
I have five videos, I might be able to do something Monday, going out of town for a week tuesday.
I'll prove a banging Y pipe isn't causing anyones KR.