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Just an update. I went on a short (5 mile) drive from cold. Let it warm for 2 minutes before leaving and as I pulled in my driveway oil temp of 225. Coolant temp 178. Highest RPM reached was 4000 for only a second. Ambient temperature is 57 degrees... probably going to do something.
Update: I did change the oil. Wanted to get tuning and mileage on it since build. Threw in some synthetic instead of conventional to at least help at the higher temps. Will see if that effects temperature.
Also, oil that was in there thinned out a bit. Some fuel dilution from the really fat base tune etc. That may help some too now that the tune is pretty spot on to stoich.
i gather you are not stock. i re read my oil temp saga thread. i had very good results from the kc4. it basically regulates the temp of the oil to within 7 degrees of the coolant.
i never did come back to update that thread after taking it to the track. i never saw over 119C HARD HARD HARD track driving in 30 minite intervals. That was with a cleaned rad, open cat, and kc4. It definitely regulates the oil.
That said, my zr1 with an external cooler ...I NEVER see oil hotter than 95c.
i gather you are not stock. i re read my oil temp saga thread. i had very good results from the kc4. it basically regulates the temp of the oil to within 7 degrees of the coolant.
i never did come back to update that thread after taking it to the track. i never saw over 119C HARD HARD HARD track driving in 30 minite intervals. That was with a cleaned rad, open cat, and kc4. It definitely regulates the oil.
That said, my zr1 with an external cooler ...I NEVER see oil hotter than 95c.
go for the external oil cooler!!!! it will work!
I actually took at rip up and down the parkway and it held 230. Left the rpms around 2700 to try and get some heat in it. Seems the low speed really gets it warm. One thing, the synthetic holds the same pressure hot and cold at idle now so I'm sold lol.
How sure are you that your oil temp gauge is right?
I hit the filter with an ir gun a while back and it was pretty close, like 5 degrees lower. I suppose it could be wrong though. I never verified it after the headers and work.
I have the same issue on my car.
No factory oil cooler, keeping the rpm over say 3600 for an extended period at low speeds during the summer cooks my oil pretty good.
Adding an oversized filter, and sheielding that filter from my headers helps a bit, but the temps can still shoot up and over 260.
I had it hit 294 per the temp gauge one summer, stuck in traffic, and something like 105F outside.
I also have issues with my coolant temp, but i believe my transmission/loose converter is to blame since i still have it running through the radiator.
Soon to be separated.
The only thing i really worry about with an after market cooler, is when it's cold out.
I don't want to over cool, so some sort of temp controlled bypass would be awesome.
Something i have an issue with on my S10, during the winter i like to tape off my transmission cooler so only 25% of it is open.
I would like to see what you figure out, since it's going to be a while before i start messing with it on my car.
ETA: For the thread, I also have a "mild" flat tappet cam.
Exhaust: Same type, headers (ceramic coated inside and out), and 3in exhaust.
I have the same issue on my car.
No factory oil cooler, keeping the rpm over say 3600 for an extended period at low speeds during the summer cooks my oil pretty good.
Adding an oversized filter, and sheielding that filter from my headers helps a bit, but the temps can still shoot up and over 260.
I had it hit 294 per the temp gauge one summer, stuck in traffic, and something like 105F outside.
I also have issues with my coolant temp, but i believe my transmission/loose converter is to blame since i still have it running through the radiator.
Soon to be separated.
The only thing i really worry about with an after market cooler, is when it's cold out.
I don't want to over cool, so some sort of temp controlled bypass would be awesome.
Something i have an issue with on my S10, during the winter i like to tape off my transmission cooler so only 25% of it is open.
I would like to see what you figure out, since it's going to be a while before i start messing with it on my car.
If you do the trans cooler do it in series with the radiator cooler. You'd need a massive air to water cooler to match that. If you do it on the outlet it'll warm quick and stay 30-50 below water temps. I did that on my old truck as just the external cooler could not keep up.
Yeah, that's what i did actually.
My trans cooler is just a single pass, but nearly the size of my radiator.
My trans temps still get up there pretty good, I'm going to add a much higher quality cooler later on.
I have one that i bought to use with my air compressor to help cool and dry the air coming out, but i decided i don't need it.
Yeah, that's what i did actually.
My trans cooler is just a single pass, but nearly the size of my radiator.
My trans temps still get up there pretty good, I'm going to add a much higher quality cooler later on.
I have one that i bought to use with my air compressor to help cool and dry the air coming out, but i decided i don't need it.
the stacked plate ones work wonders especially for the size.
Update: I've curved the oil temp problem at least by a lot. It was in the mid to upper 80s all last weekend and I gave the car a beating. Oil temps stayed in the 215-230 range which is perfectly acceptable compared to the 275 I saw after 1 single rip before. I did the new radiator which keeps my coolant in the 190 range and it definitely helped a ton. So for now its safe and it buys me time to properly plan out the oil cooler as a winter project.
@ChumpVette Curious, is that the 10000 series derale unit? What are you running for hose? AN? I was thinking I may bend tubing and just do short jumps in flex line or just run AN straight through. You notice an oil pressure drop with it? That's what I'm most worried about right now. Was reading a couple guys lost 10psi adding it. (Well not lost, just more losses... you know, head, friction, etc) my warm pressure is 28-35 now so dropping some would put me in the scary range for pressure imo... just curious what your experience was. I'm thinking the 10000 fits the bill though, smaller and multiple pas and will accept -8.
@ChumpVette Curious, is that the 10000 series derale unit? What are you running for hose? AN? I was thinking I may bend tubing and just do short jumps in flex line or just run AN straight through. You notice an oil pressure drop with it? That's what I'm most worried about right now. Was reading a couple guys lost 10psi adding it. (Well not lost, just more losses... you know, head, friction, etc) my warm pressure is 28-35 now so dropping some would put me in the scary range for pressure imo... just curious what your experience was. I'm thinking the 10000 fits the bill though, smaller and multiple pas and will accept -8.
It's a 10000 series. I can't remember the unit number. But running AN braided hose from a sandwich filter housing. I didn't notice a huge pressure loss, but I'm not really at idle other than warm up. As long as you are not adding bend after bend after bend, you should be good. That's what gets a lot of people and use the appropriate size hose. Don't use something that is oversized for the application. -8 will be sufficient. -10 at the most.
It's a 10000 series. I can't remember the unit number. But running AN braided hose from a sandwich filter housing. I didn't notice a huge pressure loss, but I'm not really at idle other than warm up. As long as you are not adding bend after bend after bend, you should be good. That's what gets a lot of people and use the appropriate size hose. Don't use something that is oversized for the application. -8 will be sufficient. -10 at the most.
I was figuring -8 (1/2 inch) because of the oddball accessory drive on the earlier cars I'll have to go out to get around the power steering pump I think then just do a straight shot. I'm going to put it infront of the radiator like you showed. It's only going to help. I didn't think there'd be much of a drop. My cruising pressure is in the 60+ range warm so it's not a wear problem I think either. I'll see what happens.
@ChumpVette Just wanted to say thank you for all the help. I got it installed 2 weeks ago before I went through the suspension. I still can't drive it too far as I don't have my tires and I'm on 30 year old rollers but the little bit of pulling I do do it seems to run pretty much at the coolant temp now or a few degrees warmer. And when the fan comes on it starts dropping quick too. I'll know better once it's warm out but it ran for 2 hours yesterday just idling and doing short first gear bursts up and down the driveway and only went so hot as 197. Flipped the main fan on for 5 minutes or so and it dropped down to 186. So it seems way better.
I was bouncing between a 10 and 16 row and called a friend and we agreed the 16 would be overkill for how I drive the car. Our spitballed numbers based on the supplied BTU data showed this is adequate. Thanks again. Next up... figure out why my air dam is 2 different sizes lol.
Figured I'd update. Yesterday was low to mid 60s. I really leaned into the car hard and about the highest temps I saw were 206 on the oil. It actually seems to help keep the coolant itself cooler as the fans cycled on and off a lot less than I remember them doing... granted I fixed some other things too so I can't be certain that is directly related. Supposed to be low 80s today so I'll have more testing to do but I feel confident it's in a good place. Had it idling after a flogging for 45 minutes and oil temps hovered around the 190 mark where they used to creep up sitting. Overall I'm happy. Worst case is I have to go to the next size up unit. There is enough slack in the AN line to do it. It's just taller. The width is the same otherwise but it seems good at the moment.
I know prior a good hard rip or two to 6700 would bring it from 200 to 230 in short order and now it actually drops off holds instead of climbing.
Figured I'd update this. So it was in the low to mid 90s Tuesday and Wednesday. I ran the car hard. AC max plus pretty hard driving. My temps stayed in the 200-235 range and any steady speed tanked them back to 200. So I'd say it worked out well. But I probably could've went to the next size up and had better performance. But overall I know it helped a lot. And didn't change oil pressure much if any. Cooling fans come on and oil temp goes down as well so overall it's a win in my book.
