91TSI505
20+ Year Contributor
- 256
- 0
- Jan 10, 2003
-
Albuquerque,
New_Mexico
Ok, i just got my car a few days ago with a fresh rebuilt motor. I babied the car on the way home (10 miles) because i though that the was the most common used method when breaking in a new motor. I then read here that some people were having problems with there rings sealing right when they baby there new motor, then i was reading from a wiseman that he liked to drive his car a little hard after a rebuild so he would get good compression within 100 miles on the new motor (More boost but not to much RPM's). So i decide to take it out and put a little boost on it, i made a couple 2nd gear pulls @6psi and at a max of 4,500 rpm's. I went and looked at my log and had 43 counts of knock????!!!!! I am almost positive that its phantom knock beacause i dont see how i could have that much knock with the setup i have, here is my setup:
-.20 over block/Wiesco pistons/Stock 6 bolt rods/Clevite bearings
-ARP everyting/Cometic headgasket
-PTE SCM 50/28x12x3 FMIC
-The rest of my mods are listed
H-fuel trim: 95%
L-Fuel trim:110%
o2's: Bounce around from 0-80
Timing Advace under boost: 15 degree's
I know that the loud lifters will trigger off a knock sensor but mine don't seem that loud at all. I have an open 3" downpipe that is extremely loud but i dont see that triggering the knock sensor, could it possibly be a bad knock sensor? i know the A/F gauge is almost worthless but it reads about stoich under boost. Could my logger be reading it wrong? Also whats good timing advance under boost? Please help me figure this out, Thanks!
-.20 over block/Wiesco pistons/Stock 6 bolt rods/Clevite bearings
-ARP everyting/Cometic headgasket
-PTE SCM 50/28x12x3 FMIC
-The rest of my mods are listed
H-fuel trim: 95%
L-Fuel trim:110%
o2's: Bounce around from 0-80
Timing Advace under boost: 15 degree's
I know that the loud lifters will trigger off a knock sensor but mine don't seem that loud at all. I have an open 3" downpipe that is extremely loud but i dont see that triggering the knock sensor, could it possibly be a bad knock sensor? i know the A/F gauge is almost worthless but it reads about stoich under boost. Could my logger be reading it wrong? Also whats good timing advance under boost? Please help me figure this out, Thanks!