FA20 Engine Oiling, Bearings, and Starvation

[Element Tuning]

Originally Posted by Nigelr32

A little off topic, but I need to know something please.. With the uprated valve springs in place are you experiencing any excessive rocker wear. I checked my stock springs, and they are around 45lbs at fitted height and 135lbs at 11mm.
Kelford springs run at 68lbs and 166lbs respectively. This seems a big jump for those little rocker assemblies??


Love the thread Phil, great video's too!!

We are not seeing wear with the rockers (we use Ferrea in our builds FYI) but the rockers themselves can fail. I'm not going to share specifics about our engine build specs but when we do the big valve heads the install height can effect the seat pressure so you have to double check and adjust that stuff.

Given we do Rev to 9k rpm with our engine the oem rockers cannot be trusted and we do see the axle pins fail. We do address this as part of our engine builds but people have also had pin failures with oem, NA engines. Search posts started by "Element Tuning" and there is a thread specific to the rocker failures we've encountered. Poor manufacturing quality control is pretty much what you can chalk it up to.

[Slowmotion]

First off, I really like this thread, it has a lot of good info in it.

But, I have a question for you Phil. If using an oil cooler helps but doesn't bring down your temperatures enough to ensure proper viscosity to float the crank and connecting rods, has anyone thought of the idea of using AC to cool the oil? Yes you will lose 5 or so hp when running and tax your AC system, A LOT, but I think you would get the oil away from 260F+ temperatures using AC.

[Luckrider]

Originally Posted by Slowmotion

First off, I really like this thread, it has a lot of good info in it.

But, I have a question for you Phil. If using an oil cooler helps but doesn't bring down your temperatures enough to ensure proper viscosity to float the crank and connecting rods, has anyone thought of the idea of using AC to cool the oil? Yes you will lose 5 or so hp when running and tax your AC system, A LOT, but I think you would get the oil away from 260F+ temperatures using AC.

I know I run the AC on the cooldown lap and when the car is sitting after coming off track until the oil hits below ~200.

[dave-]

Originally Posted by Luckrider

I know I run the AC on the cooldown lap and when the car is sitting after coming off track until the oil hits below ~200.

I do this also, turn on AC, low rpm but keep speed up and stay off the brakes as much as possible on the cool down. Don't shut the car off until temps are the same. The coolant temps would be quite high also so the cooldown process would benefit that also.

[Luckrider]

Originally Posted by dave-

I do this also, turn on AC, low rpm but keep speed up and stay off the brakes as much as possible on the cool down. Don't shut the car off until temps are the same. The coolant temps would be quite high also so the cooldown process would benefit that also.

I've never been above about 205 water temp on track.

[Captain Snooze]

Originally Posted by Luckrider

I know I run the AC on the cooldown lap and when the car is sitting after coming off track until the oil hits below ~200.

What purpose does this serve? I've not seen this procedure before.

[Element Tuning]

Running your AC won't cool your oil just your body

They make AC coolers which is what I believe has been suggested. Some are using AC based intercooler and there is some success there. The problem is that running the AC creates a ton of heat in the condenser which is then pumped onto your radiator.

[Wayno]

Originally Posted by Slowmotion

First off, I really like this thread, it has a lot of good info in it.

But, I have a question for you Phil. If using an oil cooler helps but doesn't bring down your temperatures enough to ensure proper viscosity to float the crank and connecting rods, has anyone thought of the idea of using AC to cool the oil? Yes you will lose 5 or so hp when running and tax your AC system, A LOT, but I think you would get the oil away from 260F+ temperatures using AC.

This makes no sense to me.

People might run their AC on cooldown just because the fan activation temp is lower than AC off. Even then it will only come on while stationary and overheating. Better solution is just to modify the fan temps in tune so they come on when going slower than 40mph.

[Koa]

Originally Posted by Element Tuning

Running your AC won't cool your oil just your body

They make AC coolers which is what I believe has been suggested. Some are using AC based intercooler and there is some success there. The problem is that running the AC creates a ton of heat in the condenser which is then pumped onto your radiator.

so how do they circumvent that paradox? would be interesting to see a working system

[Luckrider]

Originally Posted by Captain Snooze

What purpose does this serve? I've not seen this procedure before.

The AC running turns on the secondary fan. I read somewhere that it also blows over the oil pan incidentally.

[Captain Snooze]

Originally Posted by Luckrider

The AC running turns on the secondary fan. I read somewhere that it also blows over the oil pan incidentally.

Let me get this straight. You are heating the air blowing into the radiator to cool your engine?

[dave-]

Originally Posted by Element Tuning

Running your AC won't cool your oil just your body

Correct but once you park the car, the fans run with the a/c on so forces air through the radiator and oil cooler.

[Dipstik-sportech]

Originally Posted by dave-

Correct but once you park the car, the fans run with the a/c on so forces air through the radiator and oil cooler.

Both fans kick on regardless if the ac is on when the engine reaches a certain temp anyways. Turing the ac on then heats up the condensor which it next to the rad causing the fans to draw warmer than ambient air across the rad not ideal.

[D K]

I thought I was being anal by turning on the heater on my cooldown lap...???...