Oil Pressure Range

[HRTROB]

@Element Tuning thank you for sharing your findings. I'm glad that I'm not the only one experiencing low oil pressure issues at the track. I'll be sure to follow your thread.
@victorb suggested using a smaller oil filter to help with the pressures. What are your thoughts on this?

[HRTROB]

Originally Posted by Tye300

My oil pressure gauge arrived today. Will install it on Sunday. @Dezoris, I ordered the same mount! Mine has not arrived yet, how is it?

Tye how long did it take for them to ship it when you placed your order? Did you order it from Cravenspeed? I'm thinking of ordering the same thing cause I'm already running out of places to mount my gauges. Lol

[rb6freak]

Originally Posted by Dezoris

I have the oil gallery plug for NBT and Prosport gauge (temp).
Been trying to figure out where I am going to wire it to and how to do the dimmer, I have never really ****ed with that stuff before. What are you plans for that?

Not sure how your illumination works on your gauge, but for AEM Wideband Failsafe I used the illumination signal on the stereo harness.

http://www.ft86club.com/forums/showt...t=28800&page=5

[Tye300]

Originally Posted by Dezoris

I have to say, I like it and I rarely say that about aftermarket parts. I had to tigten the pod with the gauge in it on the dash with the allen key and I was getting super pissed off, because its tedious but I have no patience anymore.

There is nothing else like it aside from the Perrin mount.
Only room for improvement is they need to add some angle (toe) adjust ability to it. Or just curve the bracket a bit. You will see when you get it.

Thanks @Dezoris. I get what you mean. Looks great though. Patience is a virtue, specially when modifiying cars!

[Tye300]

Originally Posted by HRTROB

Tye how long did it take for them to ship it when you placed your order? Did you order it from Cravenspeed? I'm thinking of ordering the same thing cause I'm already running out of places to mount my gauges. Lol

Fairly quick rob. Around 2-3 days. Yes I ordered it direct from cravenspeed. I'll have Autokoz wire the gauge up, then visit you for the install of the galley plug when you're free.

[Element Tuning]

Originally Posted by Dezoris

I think its critical for people like yourself to be sharing data because you are at the extreme end of the limits. Based on what I have seen so far, even with conservative power levels, I just watch how the oil pressure has such a massive swing from high, medium low the hotter that oil gets.

I start seeing 60-65 PSI when oil is hitting 220F near 7200RPM and its worries me. However I have two UOA with zero wear material after track time so I think oil pressure is only one piece of the data.

I am going to try and start posting my stuff this next week.
Thanks for starting thread.

If 60-65 is what people are actually seeing that's safe for probably up to 400 hp. The rod bearings are really narrow on the FA so I don't know exactly the pressure requirements until we are done with our engine R&D but on the EJ motor in the 60s we were skimming bearings at the 500 hp range. 70 psi and up is the target under racing conditions and under street conditions that's closer to 85 psi (We lose 10-15 psi from temperature).

NA guys just shouldn't worry much but it's still not a bad idea to run a high quality synthetic and to also run a cooler if you track the car. I would imagine even 45 psi is safe.

Now for those who are turbocharged or supercharged I found 350 was reliable under racing conditions but I was running 40w Red Line Race oil. This oil is really the best at staying in grade at high temperatures (staying at the rated viscosity) which will help with oil pressure. Supercharged guys may get away with a little more power since power increases linearly with oil pressure and doesn't have the early torque peak you get from a turbocharger.

Plenty of people are spinning bearings even with build motors and I have which is why I'm R&Ding oil pumps etc. Now I was running 400+ hp and 9k RPM with 325 racing slicks so given the data we are seeing it's no surprise to me I spun a bearing. For us to build a reliable race worthy engine we need to see a consistent 85 psi in street conditions and ideally 75 psi under racing conditions. I truly feel based on our engine and racing experience, nothing less will be reliable (at 400+ hp)

Thanks,
Phil Grabow

[fooyc]

Total 5w50.
Stock engine w/ Oil cooler.
Oil temp ~90 to 100c, Oil press(idle) at ~ 1.5 to 2.0bar, On load is ~ 6.0bar
Oil temp ~110 to 120c, Oil press (idle) ~1.2 bar, On load is ~ 5.0bar.
Sensor is located same place as the factory spot.
Local temp noon time is ~ 30 to 34c.

Q? I wonder is we used higher viscosity oil ie 10w50, 15w50 or 10w60 will we have higher oil press... ie 6.0bar+ on load even oil temp reach 120c? Thks

[protpibe]

You're already exceeding the recommended viscosity at 5w30. I would strongly recommend going to anything higher

[fooyc]

yeap... that's just a recommended spec. Over here the weather is damn HOT & Humid all year round. there for I don't follow the factory spec. also our boxer engine crank bearing hv to take more load then an In-line. so need a higher/stable oil press to "hold" up the bearing if for long term use. also this car spend most of the drive time in a track then road used.

anyway.. thks for the feedback.

[Element Tuning]

Originally Posted by fooyc

Total 5w50.
Stock engine w/ Oil cooler.
Oil temp ~90 to 100c, Oil press(idle) at ~ 1.5 to 2.0bar, On load is ~ 6.0bar
Oil temp ~110 to 120c, Oil press (idle) ~1.2 bar, On load is ~ 5.0bar.
Sensor is located same place as the factory spot.
Local temp noon time is ~ 30 to 34c.
bar m
Q? I wonder is we used higher viscosity oil ie 10w50, 15w50 or 10w60 will we have higher oil press... ie 6.0bar+ on load even oil temp reach 120c? Thks

You'll be about 4.3 bar measured at the mains (minus 10 psi). If you can keep your oil temps in the 120C range your pressures are totally fine for NA application so no need to increase the weight anymore. You can increase it and it won't hurt your engine but in NA form you could give up some HP by doing so. Once your oil gets above 100c the recommend oil weight is no longer applicable since that is how the viscosity is determined. So you may have to go to a 30w to get the viscosity you need at 120c and at 140C you may need to go all the way to a 40w.

Thanks,
Phil Grabow

[fooyc]

thks! So far if I rev to 7k rpm from 1st to 5th gear the oil temp stay ~ 120c with 5 hot laps (5.5km/laps) , unless that noon time we have weather temp of >38c.

May be next round will try out the 300v 15w50.... as over here 10w50 seem not available. give up some HP is better sorry then a bad crank bearing.. haha. will try to cover that with better handling.

also I think I read some where.... it said cos' due to our dual AVCS system the engine may have a lower oil press?

thks again!

[Dezoris]

Here was from more testing.
I wont be running longer than 20 minute track sessions anymore thats for sure.

[Element Tuning]

Originally Posted by fooyc

thks! So far if I rev to 7k rpm from 1st to 5th gear the oil temp stay ~ 120c with 5 hot laps (5.5km/laps) , unless that noon time we have weather temp of >38c.

May be next round will try out the 300v 15w50.... as over here 10w50 seem not available. give up some HP is better sorry then a bad crank bearing.. haha. will try to cover that with better handling.

also I think I read some where.... it said cos' due to our dual AVCS system the engine may have a lower oil press?

thks again!

Don't worry you won't hurt a thing going even to a 20w50 which I've resorted to along with internal engine mods and more.

The dual AVCS isn't the direct cause it's due to the design of the oiling system in that it's not a "main priority" engine. Search out my thread in "Engine" if you want to know exactly how the oiling system is designed and why it's a problem. In a nutshell your main bearings do not get oil pressure priority, everything shares the same priority (mostly).

Thanks,
Phil Grabow

[Element Tuning]

@Dezoris That about sums it up. Yes we're good. Ok we're still acceptable. Oh boy this is bad! LOL!