XiKeiyaZI
15+ Year Contributor
- 6,967
- 55
- Dec 28, 2008
-
Goldsboro,
North_Carolina
Okay, so this has been bugging me so I figured I would post it -
The Talon is now up and running and doing so smoothly. I've driven it and it's performed like butter. Even gave it a single half throttle boost-load and was extremely impressed with the power produced as it is untuned. Held 14.4-15.0 AFR the entire time. Only brought it up to 5500rpms.
Anyway, one thing I've noticed is that from 3000rpm - 4200rpm there is a... ticking noise? Coming from the head. At first I was afraid that I didn't flush the engine well enough and that some sort of material from the head had made it's way to the rod bearings - but upon an oil drain I found no flakes, only a little bit of aluminum contamination/glitter from the rebuild as expected with any rebuild/machine work. So I'm now on my third cycle of oil and about 5 miles in, and about 2 hours of run time total. Nothing on the dip stick and no 'knocking' the be heard of. However, driving it, from that RPM range, there is a very quiet but high-pitched ticking. If I manually bump the throttle body while under the hood, it -sometimes- produces the same effect, but again it's hardly noticeable.
I do have Revised lifters. I was afraid that it might be a collapsed lifter but upon trying to depress them I had no luck. I see no shavings of any sort on top of the pistons to indicate valve contact and Pressure across the board is 155. Idles great. Pulls amazing. Now these are BC 272's on Supertech Dual Valve Springs, Titanium Retainers, and 1mm over valves. Is this usual? Can Revised lifters produce 'lifter tick'? Eh? Like I said, it's coming from the head.
Also! When I shut the car off, any time, there is a multiple clicking noise that slows down over a few seconds to nothing coming from the area of the PCV. Again, no idea what this could be. Never encountered it.
Just a bit concerned/curious. I'll try to get a video if possible.
Edit - I did my best to reproduce it for about 20 minutes - couldn't. Will try again tomorrow and see if I can capture it.
The Talon is now up and running and doing so smoothly. I've driven it and it's performed like butter. Even gave it a single half throttle boost-load and was extremely impressed with the power produced as it is untuned. Held 14.4-15.0 AFR the entire time. Only brought it up to 5500rpms.
Anyway, one thing I've noticed is that from 3000rpm - 4200rpm there is a... ticking noise? Coming from the head. At first I was afraid that I didn't flush the engine well enough and that some sort of material from the head had made it's way to the rod bearings - but upon an oil drain I found no flakes, only a little bit of aluminum contamination/glitter from the rebuild as expected with any rebuild/machine work. So I'm now on my third cycle of oil and about 5 miles in, and about 2 hours of run time total. Nothing on the dip stick and no 'knocking' the be heard of. However, driving it, from that RPM range, there is a very quiet but high-pitched ticking. If I manually bump the throttle body while under the hood, it -sometimes- produces the same effect, but again it's hardly noticeable.
I do have Revised lifters. I was afraid that it might be a collapsed lifter but upon trying to depress them I had no luck. I see no shavings of any sort on top of the pistons to indicate valve contact and Pressure across the board is 155. Idles great. Pulls amazing. Now these are BC 272's on Supertech Dual Valve Springs, Titanium Retainers, and 1mm over valves. Is this usual? Can Revised lifters produce 'lifter tick'? Eh? Like I said, it's coming from the head.
Also! When I shut the car off, any time, there is a multiple clicking noise that slows down over a few seconds to nothing coming from the area of the PCV. Again, no idea what this could be. Never encountered it.
Just a bit concerned/curious. I'll try to get a video if possible.
Edit - I did my best to reproduce it for about 20 minutes - couldn't. Will try again tomorrow and see if I can capture it.