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Old 26-07-2018, 09:40   #1
Lolo la Torche
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Water Overheating wsith Top Mount

Hi All,



Last Week end we mount and set up a 7670 Top mount Kit instead of my 7163 on my 2 litres forged engine.

Down and manifold were wrapped, Turbo has its own blanket. Car still have AC and runs an Evo 6 OEM water radiator.

Oil rad is a 26 Row Setrab.

Car is now 625HP and 680nm.

We tried the car on the Castellet last saterday. It was 29°C. For the first time, with full boost (2.2B), I have water overheating in 3 laps (114°C). Head Gasket is OK, I Don't loose too much water and if I put down the boost to 1.8B, the car doesn't overheat anymore (so no overpressure)

I know that more power means more heat...I would like to keep AC, so what serious options do I have to solve this?

I was thinking to add a radiator on the cooling of the turbo?
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Old 26-07-2018, 09:53   #2
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Do you have uprated oil coolers?

Also, can you not install an uprated radiator? Does this cause problem with AC location?

Perhaps a high flow water pump?
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Old 26-07-2018, 11:02   #3
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If it's so much boost related, you may suffer headlift issue.
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Old 26-07-2018, 11:10   #4
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Yes the oil cooler is upgraded. As I wrote, it is a 25 row Setrab.

I’m afraid a bigger radiator won’t have enough place to be mount.

Upgrated pump? Too late? Mine is new, it has 150 km including dyno settings ��
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Old 26-07-2018, 11:12   #5
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Yes, it’s boost related, but on the Motec logs, we can see a step by step temp increase. It doesn’t look like water is pushed, and a very little water is missing.
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Old 26-07-2018, 15:07   #6
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Are you still using the OEM radiator and A/C fans, and is radiator fan running a maximum speed?

I don't think adding a turbo "radiator" is worth the effort? It would be worth checking for any airlocks in the turbo plumbing

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Old 26-07-2018, 15:09   #7
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I have the AC OEM radiator, OEM Evo 6 Water Radiator and slim Revotec Comex high perf FAN

What does airlock in the turbo means? better heat extration from turbo?
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Old 26-07-2018, 16:00   #8
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I would first check for traces of exhaust gas in the coolant, just to rule out head lift..
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Old 27-07-2018, 10:25   #9
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I had a similar problem with my RVR, its got a Norris 2.0LR and I'm only running a 9.5T blower but found on a hot summers day the temps rising too much for my personal taste.

So to solve it I had a radiator made with a 1/3rd more capacity, now it runs max 82c with an outside air temp of 30+. In normal weather it runs at 75c.
I also run a OEM E9 Oil cooler and my oil temps dont go above 90 on full tilt.

Oh the rad cost about £400
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Old 27-07-2018, 12:16   #10
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Quote:
Originally Posted by 2+barplease View Post
I had a similar problem with my RVR, its got a Norris 2.0LR and I'm only running a 9.5T blower but found on a hot summers day the temps rising too much for my personal taste.

So to solve it I had a radiator made with a 1/3rd more capacity, now it runs max 82c with an outside air temp of 30+. In normal weather it runs at 75c.
I also run a OEM E9 Oil cooler and my oil temps dont go above 90 on full tilt.

Oh the rad cost about £400
That sounds like a very interesting proposition. Mine runs a Koyo rad but I very often front the temps creeping up, a little too much for my personal taste also.

Who/Where did get the custom rad done? Was it based on an OEM rad?
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Old 27-07-2018, 13:34   #11
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Standard radiators work well providing they are in good condition.

What headstuds are you using?
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Old 27-07-2018, 13:37   #12
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Old 28-07-2018, 10:14   #13
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[QUOTE=Lolo la Torche;6114188]I had a Koyo on my list, but as you can see on the engine bay pic, I'm not sure it can fit with a top mount turbo, there are no space…




2+Bar, do you have AC?

No I had to delete it to fit the fans.

I'll have a measure up on Sunday and give you size, plus I'll dig out the invoice by the firm who made it.

Oh I run 2 x Slimline fans, one pushing one pulling.
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Old 28-07-2018, 10:22   #14
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Originally Posted by strange_days_uk View Post
That sounds like a very interesting proposition. Mine runs a Koyo rad but I very often front the temps creeping up, a little too much for my personal taste also.

Who/Where did get the custom rad done? Was it based on an OEM rad?
It is based on an OEM rad yes, I sent my oem rad to them so the locating pins would be in the correct place and they made me a new one slightly wider and thicker core. Works really well, on the M25 on a hot day 30ish my water temps stay low. in fact i have a pic on my phone of my gauges on the m25 just recently.intake air temp is 36c so hot outside, my water temp 73c oil temp 81c thats at about 80mph.
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Old 29-07-2018, 10:37   #15
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Ok, that sound's interesting but I have no overheating except on track days, so hard use, will more than 2 bar turbo boost.

At a constant 80mph, I have no overheating problem

At high speed, a fan decrease rad efficiency ,it acts like a barier and blocks air flow

Last edited by Lolo la Torche; 29-07-2018 at 10:39..
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