the baPhoon
Active member
So im in my on going fix the knock endevour and i need some info.
What are your normal operating temps (stock radiator stock upper and lower chiller)?
Im getting some audible knock in the truck under boost and boost only. Went for a short, spirited DM run this afternoon and returned home. Checked my DM runs and my engine temp was sitting at 207*.
My intercooler issue i took care of this morning and it is now running like a champ. Highest IAT i recorded was 147*. The thermostat in my garage currently reads 118* so as you can imagine the engine was a little warm.
Now, the audible knock im hearing is comming from the passenger side. I hear the pinging at/around 0 to 4 pounds of boost and it seems to die off soon there after.
The thing bugging me here is the fact that it is audible. Not good. I can standing rev it to the limiter in the garage and get NO knock at all, so i took the intake tube off the turbo and checked the impeller. I noticed a little verticle play in the impeller but through the eyes of my cracked mechanics mirror it doesnt seem to be contacting the housing. The blades are straight as an arrow with no chips or mars to the blades or the housing itself.
Another issue is my AFR and TPS. TPS hasent shown 100% WOT in any of my latest DM runs. At WOT (or 100% throttle 85% plate open heh) under boost im hanging around 10.2 on my new WB AFR. Idle and cruise its bouncing between 14.5 and 15.5 with an occasional split second dip into the lean side of things.
Kinda lost at the moment heh. I know the heat mixed with the richness is definatly causing knock issues.
My knock sensor seems to be a little screwy so im going to replace that as soon as i recoup some of the funds ive spent on upgrades for the truck lately. I did the tap test near the knock sensor and each tap with a 3/8ths inch tube registered hundreds of knock counts.
Im not really frustrated with the truck in any way. Im damned content tracking down and troubleshooting all the issues as im learning a TON from the forum members and literature ive been reading.
I was considering getting some VP Streetblaze 100 from a local shop and seeing if that takes care of some of the kock since the best i can do around goodyear is 91 octane.
If any of you would like to take a crack at my DM files just PM me or leme know and ill post up all of my recent runs.
At the end of todays run my KC's were hovering around the 18,000 mark heh.
What are your normal operating temps (stock radiator stock upper and lower chiller)?
Im getting some audible knock in the truck under boost and boost only. Went for a short, spirited DM run this afternoon and returned home. Checked my DM runs and my engine temp was sitting at 207*.
My intercooler issue i took care of this morning and it is now running like a champ. Highest IAT i recorded was 147*. The thermostat in my garage currently reads 118* so as you can imagine the engine was a little warm.
Now, the audible knock im hearing is comming from the passenger side. I hear the pinging at/around 0 to 4 pounds of boost and it seems to die off soon there after.
The thing bugging me here is the fact that it is audible. Not good. I can standing rev it to the limiter in the garage and get NO knock at all, so i took the intake tube off the turbo and checked the impeller. I noticed a little verticle play in the impeller but through the eyes of my cracked mechanics mirror it doesnt seem to be contacting the housing. The blades are straight as an arrow with no chips or mars to the blades or the housing itself.
Another issue is my AFR and TPS. TPS hasent shown 100% WOT in any of my latest DM runs. At WOT (or 100% throttle 85% plate open heh) under boost im hanging around 10.2 on my new WB AFR. Idle and cruise its bouncing between 14.5 and 15.5 with an occasional split second dip into the lean side of things.
Kinda lost at the moment heh. I know the heat mixed with the richness is definatly causing knock issues.
My knock sensor seems to be a little screwy so im going to replace that as soon as i recoup some of the funds ive spent on upgrades for the truck lately. I did the tap test near the knock sensor and each tap with a 3/8ths inch tube registered hundreds of knock counts.
Im not really frustrated with the truck in any way. Im damned content tracking down and troubleshooting all the issues as im learning a TON from the forum members and literature ive been reading.
I was considering getting some VP Streetblaze 100 from a local shop and seeing if that takes care of some of the kock since the best i can do around goodyear is 91 octane.
If any of you would like to take a crack at my DM files just PM me or leme know and ill post up all of my recent runs.
At the end of todays run my KC's were hovering around the 18,000 mark heh.
) and last by not least i re-routed some of my vac lines to clean up the engine bay a bit. The coolent in the radiator/block was aweful. Nice dark dark green/brown with chuncks of gelled coolent. No doubt its been in the truck since 92. Had a little rust in the lower heat exchanger but other then that everything is goin smoothly.