260 oil temp with 34 row cooler.... help!

andy_meng1024

I have 2*34row coolers in parallel and my max track temp is 240F in the South East Asia crazy weather.

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AlWakRa

Engine oil you are using can affect temps, I had used multiple types, Mobil, Motul, Liqui Moly, Castrol, and oem nissan, mostly 0w40 or 5w40. While I cannot comment on oem, Moly was the worst, the temps rise quicker than others. Mobil wasn't too far. Best luck was with Castrol and Motul.


Also there is another thing in my mind, would fuel affect temps? like if the tune is aggressive for the used fuel, would it affect temps? Last trackday, which was the hottest and most humid day I participated in, I added boostane to my fuel and used the least aggressive map, my temps was climbing the same as when I use the same tune on cooler days, I know I needed to try more aggressive tune same day to confirm my assumption.

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AlWakRa

This cooler holds 0.95 qt., normal series 6 34 rows hold 0.75 qt. so it should have a slight improvement.


Maybe this is what I need to do in my climate or one big 72 row, but will our oil pump support it?!

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redondoaveb

Hotrodz runs a 72 row.

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Rusty

A lean mixture runs hotter than a rich mixture. Advanced timing will run hotter too.

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Rusty

Stock oil pump will support it. But I would stay away from the 8,000 redlines. Even with no cooler.

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Jmatchley86

no issues with the oil pump then? hope i don't have to get crazy like that!

andy_meng1024

With parallel coolers you have the same pressure drop compare to just one cooler. If you run them in series then you lose more oil pressure. Quite a few cars have parallel oil cooler design from factory actually!


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AlWakRa

So my point is valid, I was under the impression that forced induction are more prone to that, a friend has a brz with turbo, he have multiple maps and methanol, when we tried the conservative one (around 260whp) the oil temps was good for two or more laps, but when we switched to the aggressive one (I think 290 or 300whp), it reached the same level of temps within one lap. This lead me to try and see in my car, I know many try to get best power and leave the tune on the edge (I am a culprit as well), which isn't harmful in street as you don't redline the engine too much, but at track, it is a different story.


Yup, in my case I shift earlier unless there is a turn coming or I am trying to have the hotlap of my life, let's say around 7200 my sweet spot (before the little drop in power felt between 7200-7500), and my limiter set at 7700 I think, but yeah the pressure drop will be more felt on high rpms.

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Rusty

Most engines make the most power right at the edge of knock. When I was racing bikes. We used to say lean is mean. How lean could you get it without melting a hole in the pistons.

My redline is set at 8,000. I normally shift at 7,500. The extra 500 rpms I use for those moments when it's best not to up shift and then down shift for the corner coming up.

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Spec Jay

oh I forgot one thing. Make sure you run the biggest lines your cooler can support!

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Girald

Start with racing oil sae5-50 shaffers oil can do the trick...

Hood venting...

SPAL fan on the oil cooler with 200 degree thermo switch


heres my setup though my video sux lol
https://www.youtube.com/watch?v=sJ2DT4QjoB8&t=1s

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ValidusVentus

Bit of a thread "revival" but hood vents will help more than you think. As long as you go with functional ones such as the Trackspec kit. ~10 degrees on my car with 34 row cooler. Although I do have a splitter which will help the generation of a higher pressure zone in front of the cooler; the vents reduce the pressure behind the cooler.


OP did you reach any decision yet?

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SS_Firehawk

I've been running a 72 row since 2011. It has the lowest pressure drop due to high row count and short rows. Running 10 AN fittings with high flow 90 degree bends will help. You can mount the oil cooler directly in line with air flow. I still reached 250+ temps, but the car never pulled power during 30 minute sessions. Another option is Improved Racing. They have extremely efficient oil coolers that hold more oil and are multipass. They also make amazing sandwich plates, adapters, and remote filter plates.

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Rusty

I have the Z1 34 row cooler on mine. I helped JL install his BP turbo. He has the FI 34 row cooler. One thing I noticed. The FI uses AN -8 fittings and hose. My Z1 uses AN -10 fittings and hose. The Z1 stuff is bigger, so more flow.

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