Announcement

Collapse
No announcement yet.

Forum Top Advertisment

Collapse

Engine Temperatures

Collapse
X
  • Filter
  • Time
  • Show
Clear All
new posts

  • Engine Temperatures

    Guys those who track your car, what type of coolant and oil temperatures are you seeing at the track on a hot day?
    for Oil please point out where your sensor is located.

    This weekend I ran in Miami. About 80F / 86% Humidity. @ 2:45PM
    https://www.wunderground.com/persona...0170618/mdaily

    Car temps were as follows?

    Engine coolant MAX: 228F
    Engine Oil (Right after pump going into filter) 250.5F

    I have an oil cooler which was cooling the oil down to 205F.

    I am wondering if these are within normal range.
    Thank you

  • #2
    Car is a honda S2000

    Water ranges from 198-201, 201 would be seen on 90+ degree days

    Oil is 235-240, again range is dependent on ambient.

    No oil cooler, but factory water/oil cooler retained and a large radiator.

    Oil temps taken at sandwich adapter, everything is datalogged to AIM so data is actual.

    Comment


    • #3
      I have tracked many cars. I don't worry if water temp is under 220F. If I am racing, I won't back off till 225. Your 228F in a 80F day is worrying.

      I don't worry about oil temp too much. I would shoot for under 250F. But that's not possible on most cars without an oil cooler. But again, I don't worry too much unless it is over 280F. But even then, I don't back off if racing. I believe factory cars don't go to limp mode or set off warning light till past 300F. I would just change oil more often if I see more than 250F.

      Oil temp is almost always at sandwich plate or drain plug.

      Most people will tell you water temp of under 210-220. But There are discrepancies on oil temp, anywhere from 250-300F.
      S1 Supermiata - 220whp
      13 Tesla, ma: no engine !!
      17 GT350R
      03 Miata Club Sport
      96 NSX
      06 EVO MR
      15 Mini Cooper S
      Beck 550 Spyder

      Comment


      • #4
        no one asked, but I thought I would share my oil cooler rant.
        many would disagree with me of letting oil temp go over 280F. But I dislike oil cooler for many reasons:

        1. oil cooler line may come off, sprung a leak. you are creating minimum 4 new points of connections routing through a busy engine bay.
        2. ss line cutting into other components if not routed carefully.
        3. I've seen many would let their oil drain forever during oil change. But they have over 1 quart of old oil sitting in an oil cooler. In most install, you can't get rid off all old oil if you have a cooler.
        4. create oil pressure issue if not done right.
        5. many install oil cooler in front of radiator. making radiator less effective.
        6. oil cooler might sprung a leak from rock hitting it. or from contact. extra point of failure.

        I've seen a ton of engine failure from issues above. but don't think I know of any engine that went kaboom because oil temp was too high.

        I am not against a well installed oil cooler, I have them on most of my race cars too. But unless I know my oil temp will exceed 280F consistently (all turbo cars) and/or need help controlling coolant temp, I would not bother installing an oil cooler. just change oil more often (I only use synthetic).
        S1 Supermiata - 220whp
        13 Tesla, ma: no engine !!
        17 GT350R
        03 Miata Club Sport
        96 NSX
        06 EVO MR
        15 Mini Cooper S
        Beck 550 Spyder

        Comment


        • #5
          Same car here.
          Stock EJ257.
          oil temp is around 200-220 with aftermarket oil cooler+oem water/oil cooler+aftermarket koyo radiator, 90F.
          I'm not a fan of aftermarket oil cooler but my stock engine without oil cooler was overheating about 85F. It's simply unacceptable


          Since FRS doesn't even come with water/oil cooler in stock, I also installed an oil cooler even for 200hp.
          Last edited by jqsti2015; 06-19-2017, 07:10 AM.
          VA(15) STI/FRS

          Comment


          • #6
            Originally posted by bellwilliam View Post
            no one asked, but I thought I would share my oil cooler rant.
            many would disagree with me of letting oil temp go over 280F. But I dislike oil cooler for many reasons:

            1. oil cooler line may come off, sprung a leak. you are creating minimum 4 new points of connections routing through a busy engine bay.
            2. ss line cutting into other components if not routed carefully.
            3. I've seen many would let their oil drain forever during oil change. But they have over 1 quart of old oil sitting in an oil cooler. In most install, you can't get rid off all old oil if you have a cooler.
            4. create oil pressure issue if not done right.
            5. many install oil cooler in front of radiator. making radiator less effective.
            6. oil cooler might sprung a leak from rock hitting it. or from contact. extra point of failure.

            I've seen a ton of engine failure from issues above. but don't think I know of any engine that went kaboom because oil temp was too high.

            I am not against a well installed oil cooler, I have them on most of my race cars too. But unless I know my oil temp will exceed 280F consistently (all turbo cars) and/or need help controlling coolant temp, I would not bother installing an oil cooler. just change oil more often (I only use synthetic).

            All valid points. Often races end due to contact that damages oil coolers tucked behind grilles in the corners of bumper fascias. Porsches come to mind immediately. The contact wasn't severe enough to damage the car to keep it from continuing, but emptying the engine of its oil certainly would. At the very least, the car ends up sitting till a tow truck can pull it back to the pits for repair.

            Extreme temperatures can serve to thin engine oil in the short term and thicken it long term. By using good synthetic, and changing it often, you can avoid trouble. Adding an oil cooler needs to be done properly to keep its benefits from becoming one of the liabilities William mentioned.
            www.TrackHQ.com

            Comment


            • #7
              Oil is the engine’s lifeblood and synthetic or not if you are routinely seeing temperatures North of 275F, you probably really need an oil cooler. If, in the hottest track conditions, you are seeing 250-255F and no trend higher, you are probably OK with just frequent oil changes.

              Oil coolers should normally be placed directly in front of the radiator and be in a position such that it “sees” good air flow. In such a (preferred) position, the engine heat dissipation capacity improvement easily outweighs the small reduction in air flow through the radiator. Secondly, in this position, the vulnerability of the cooler itself in minimized – damage to the oil cooler might also damage the radiator if the oil cooler wasn’t there. Placement should also consider minimizing line lengths and where possible the use of straight and 45-degree connectors for maximum flow.

              High quality lines and fittings should ALWAYS be used and we have a strong preference for braided nylon lines because they are both lightweight and less abrasive when compared to SS weave counterparts.

              I would only use an oil cooler from a supplier that openly publishes their specifications – such a Setrab. As the op points out, good flow is critically important. I would never install a Chinese-imported Mishimoto cooler on a vehicle of mine – EVER.

              Comment


              • #8
                OP: What car, STI?

                The stock '05 I used to have would run water temps around 215-225F nominal in summer months. These cars can quickly overshoot that when charging in a slight draft (235-245F = too hot). They can take a long time to come back down while peddling it. The stock cooling system isn't adequate for more than a few laps at a time on triple digit days.

                Having some intimate knowledge of EJ25's reliability in ways that can't be described as cuddly, I can say your mechanical sympathy isn't misplaced.

                Comment


                • #9
                  My engine's too vintage for 250°. My oil is usually at 205-235 on track. I have two oil coolers and a fan, on a dry-sump 14-quart system. On very hot days, I take out my headlights so air can go directly to those coolers (which are in the front fenders).

                  No water temps, since it's an air-cooled 911.
                  Jack Olsen - 1972 Porsche 911
                  What? An awesome video about me and my car
                  My Corner-By-Corner Guide to Willow Springs
                  My Two-Car Garage's Very Own Website

                  Comment


                  • #10
                    Originally posted by CoolTech View Post
                    Oil is the engine’s lifeblood and synthetic or not if you are routinely seeing temperatures North of 275F, you probably really need an oil cooler. If, in the hottest track conditions, you are seeing 250-255F and no trend higher, you are probably OK with just frequent oil changes.

                    Oil coolers should normally be placed directly in front of the radiator and be in a position such that it “sees” good air flow. In such a (preferred) position, the engine heat dissipation capacity improvement easily outweighs the small reduction in air flow through the radiator. Secondly, in this position, the vulnerability of the cooler itself in minimized – damage to the oil cooler might also damage the radiator if the oil cooler wasn’t there. Placement should also consider minimizing line lengths and where possible the use of straight and 45-degree connectors for maximum flow.

                    High quality lines and fittings should ALWAYS be used and we have a strong preference for braided nylon lines because they are both lightweight and less abrasive when compared to SS weave counterparts.

                    I would only use an oil cooler from a supplier that openly publishes their specifications – such a Setrab. As the op points out, good flow is critically important. I would never install a Chinese-imported Mishimoto cooler on a vehicle of mine – EVER.
                    Well I have to admit that my oil cooler is a Mishimoto - and like I said it is cooling the oil down 35 deg F. according to my dash and logger (Motec).
                    I am not to concerned with the oil temp. Because it coming out at 240F and going back in at 205F. I maybe add a larger oil pan (+1QT capacity) if the oil temps get higher. I looked at my logs and its between 230-240.
                    However my coolant temp did peak at 228.2F. I am running a larger radiator than factory.

                    Yes the car is a WRX STI. it is very possible that I may have ran the car on a higher boost setting at that time.. Need to go back and check.

                    Comment


                    • #11
                      What's your average water temp range?

                      228F peak occasionally on that motor shouldn't be an issue. I'd be more concerned if there are circumstances that might send it soaring higher - such as a hotter day and/or drafting.

                      Comment


                      • #12
                        Originally posted by FoxSTI View Post
                        Well I have to admit that my oil cooler is a Mishimoto - and like I said it is cooling the oil down 35 deg F. according to my dash and logger (Motec).
                        I am not to concerned with the oil temp. Because it coming out at 240F and going back in at 205F. I maybe add a larger oil pan (+1QT capacity) if the oil temps get higher. I looked at my logs and its between 230-240.
                        However my coolant temp did peak at 228.2F. I am running a larger radiator than factory.
                        few things you can try to drop coolant temp:

                        1. oil cooler, which you did to a great effect, I doubt more oil cooling will help coolant temp much in your case.
                        2. most effective mod for coolant temp is to seal around radiator. no air gets into engine bay other than through radiator. see #6
                        3. low pressure in engine bay. which means hood vents (in right location) and a bottom tray. I often see people put a big hole towards air filter, for "cold air intake", not realizing it raises engine bay air pressure. making radiator less effective.
                        4. run more water (ratio) in radiator if you aren't already are.
                        5. cross flow radiator, being more efficient.
                        6. 2nd most effective mod is to build a radiator duct. It doesn't need to be super fancy, some plastic sheet bend to shape will work well.

                        where is your intercooler ? is it in front of the radiator ?
                        Last edited by bellwilliam; 06-19-2017, 11:21 PM.
                        S1 Supermiata - 220whp
                        13 Tesla, ma: no engine !!
                        17 GT350R
                        03 Miata Club Sport
                        96 NSX
                        06 EVO MR
                        15 Mini Cooper S
                        Beck 550 Spyder

                        Comment


                        • #13
                          Well I have to admit that my oil cooler is a Mishimoto
                          Other than size/fitment concerns, the two biggest attributes of a heat exchanger are its BTU (shedding) capability AND its inherent delta pressure drop. When you are choosing Chinese-made components (like Mishimoto), you really have no idea of either specification. Install it and cross your fingers. Not my cup of tea.

                          But, full disclosure - we compete with them in offering oil cooler solutions on a couple of different vehicles. In one such example, the pressure drop across the cooler for our Setrab-based solution is 0.7psi. In comparison, the specific Mishimoto-developed solution saw a measured (by Mishimoto) pressure drop of 7.0 PSI. More telling, Mishimoto engineers posted these results in a thread - yet had no idea that these were absolutely HORRIBLE numbers. In fact, the 7.0psi pressure drop was posted as a positive attribute of their solution. Scary stuff!

                          Comment


                          • #14
                            Originally posted by CoolTech View Post
                            Other than size/fitment concerns, the two biggest attributes of a heat exchanger are its BTU (shedding) capability AND its inherent delta pressure drop. When you are choosing Chinese-made components (like Mishimoto), you really have no idea of either specification. Install it and cross your fingers. Not my cup of tea.

                            But, full disclosure - we compete with them in offering oil cooler solutions on a couple of different vehicles. In one such example, the pressure drop across the cooler for our Setrab-based solution is 0.7psi. In comparison, the specific Mishimoto-developed solution saw a measured (by Mishimoto) pressure drop of 7.0 PSI. More telling, Mishimoto engineers posted these results in a thread - yet had no idea that these were absolutely HORRIBLE numbers. In fact, the 7.0psi pressure drop was posted as a positive attribute of their solution. Scary stuff!
                            Maybe..
                            Why don't you send me one of your coolers to compare. I am going back end of July.

                            Comment


                            • #15
                              Originally posted by SeanB View Post
                              What's your average water temp range?

                              228F peak occasionally on that motor shouldn't be an issue. I'd be more concerned if there are circumstances that might send it soaring higher - such as a hotter day and/or drafting.
                              SeanB I have to check but if I recall if was somewhere between 220 - 201. I don't have access to my logs at the moment.

                              Comment

                              Working...
                              X