16 if you want to do full days and it will be ready for if you do any modifications. 13 is ok for standard but 19 is overkill

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Team SUPERCHARGED

I LIVE FOR THE 306

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That's because it overheats from lack of airflow by the time you manage to shut the bonnet.

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Ive got a 19 row 235 sits at 100 all day long and thats on a turbo car. Plenty airflow to and past is essential. Plus decent oil like royal purple etc.

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Same as that, the max my oil gets on track is 100c, with a 19 row cooler.

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"Supercharged - 454.1bhp/317.5lb/ft"
Peugeot 306 GTi-6
2000 (X), Moonstone

Depends if you're going to actually drive your track car like a track car, or just turn up and tootle around like you're on the school run. Placement and air flow is obviously key but if you're planning on being able to do proper sessions, the minimum with just standard power is a 30 row or 2 linked 16's.

The only reason people can manage with less is by doing short sessions on track (15/20 minutes)/not driving hard consistently through the entirety of their session.

When I first went down the oil cooling route, I opted for 1 x 16 row Mocal and it used to hit 140 incredibly quickly.

Through trial and failure, I opted to run with 2 x 19s linked and find even with them I can get to 115ish but it gets no higher, which is what you want. You want to be able to drive it until the tyres go off! Additionally run good oil. Just my advice, nothing worse than doing a job and then realising it's useless.

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Team Astor Grey Supercharged GTI 6

That's one hell of a statement to make. So I'm going to make one too, just for fun.

Maybe if you got more airflow by going quicker on your Ring lap you wouldn't have needed a 38 row oil cooler.

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China D Turbo HDi daily charger
Black Rallye occassional toy

I do like your car Chris, it generated a tasty show out of the exhaust at Cadwell a few years ago! The flames were huge. Savage under acceleration! Seriuosly though, through 8 years or so of playing with my track car I have no need to lie. Steve also required the same cooling spec when NA on both of his cars when tracked. So over 3 GTI 6's, 30 rows or equivalent were required to cool correctly. Therefore ruling out through the laws of averages one failing cooling system

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Team Astor Grey Supercharged GTI 6

So how come you need 30 and i need 19 and my engine possibly may run alot harder or hotter due to the forced induction??

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But surely once everything is up to temperature and it stays at that temperature then the time spent driving is irrelevant to a point. A 20 min stint should generate enough energy to create its working temperature. That temperature should not vary irrespective of operating time. Christ i got black flagged at knockhill for a 45 min stint.

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There are plenty of factors that will effect the oil temp; air temp, speed, air flow and obviously surface area of the cooler(s). If you're in nice clear cool air on a trackday in February, obviously it's going to assist keeping your temps on the lower side. If you're in traffic up and down the gears constantly, on a track day in August and its 30c - it's going to be a lot harder to keep cool. Also I commuted in a GTI 6 for 3 years. They are notoriously s**t at keeping temps down. For eg at the opposite end, in slow moving traffic for example; mine if I didn't remember to click the fans on by pressing the a/c, the coolant used to reach a zillion degrees and the oil used to rocket within minutes. Obviously if I did forget it does have the auto kick in for the fans but if it was a warm day it used to struggle to come back down for ages. They're s**te at cooling.

Like I said Chris you seemed like a knowledgable bloke at Cadwell. So I'm not going to doubt in your instance, you're able to cool yours with just 1 x 19 row. Be grateful , I wish mine did!

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Team Astor Grey Supercharged GTI 6

And boy does damien rag it lol. Always puts 110% effort in

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Similar to Damien, I only run a 16 row (I think) on the race car and it's fine! If you're running a 38 row oil cooler I think something else is wrong

I guess the type of oil being used also makes a big impact on the temps it'll reach.

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Rallye Race Car