How is your flow t the radiator? My son stole a brand new Scirocco radiator from me for his VR4. He has been running it ever since without issue. Has no problem with +90° days, he daily drives it.

do you still have a/c? any ducting? what kind of mix are you running for coolant?

For my scirocco, I have an issue sitting in traffic, but i have an obnoxiously oversized oil cooler that I'm going to move. That said, even with that, I'm able to run ~180-190 even doing pulls with mine so I think there might be more to it.

I know one of the things I'm going to do for my car is blankets for the turbine and manifold, as that seems to make a huge difference. On 362 when Ryan had that, with the blanket on the FP manifold, you could touch the top of the manifold (well, the blanket) after pulling into your driveway when the car was fully at temp.

frankly the scirocco should be more efficient since it's a twin pass, but it does seem extra sensitive to ducting & airflow.

Quoting MellowVR4:

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I think the problem is that the intercooler blocks a lot of the air flow to these smaller radiators. I have the same problem sometimes in the summer with my scirocco radiator. I thought if you use a 1g dsm radiator it'll sit a little farther back for better room.

click

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The T3/T04 wasn't making direct contact with the radiator, but the amount of clearance was so tiny that any work always led to dents, many predating my ownership.

Quoting diambo4life:

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Radiator fan. Which one are you using? Makes the biggest difference in the world. If it is any type of "slim fan" - I don't care whether it is rated at 10,000,000CFM, that is your problem.

-Mike.

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wish I could fit something other than a slim fan

Quoting EfiniX:

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Quoting diambo4life:

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Radiator fan. Which one are you using? Makes the biggest difference in the world. If it is any type of "slim fan" - I don't care whether it is rated at 10,000,000CFM, that is your problem.

-Mike.

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I've got a thin off-brand high-flow puller, and one of the stock fans pushing.

Recommendation?

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This is what I did bro. Made a big difference.
click

Quoting diambo4life:

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Quoting EfiniX:

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Quoting diambo4life:

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Radiator fan. Which one are you using? Makes the biggest difference in the world. If it is any type of "slim fan" - I don't care whether it is rated at 10,000,000CFM, that is your problem.

-Mike.

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I've got a thin off-brand high-flow puller, and one of the stock fans pushing.

Recommendation?

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This is what I did bro. Made a big difference.
click

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What Mike said. I've dicked with a million fan setups, and from my experience the off-brand cheap fans are garbage. That goes for Mishimoto's slim fan line as well. They are no better than the Ebay junk you get for cheaper.

I'm running a SPAL fan just like Mike linked to, and it works amazing: click

If your car is running hot at cruise, a better fan won't help, though. Is that the case? Is there currently any shrouding on the back side of your radiator?

I'd remove any shrouding that's present. Unless it's designed to promote airflow through the core (Like the shroud WaRrIoRs16 linked to) it's hurting your radiator's ability to cool efficiently. I think we talked about this a while back, and it didn't go over well. Bottom line, shrouding has the potential to hurt cooling if not applied in a certain fashion.

Second, ditch the crap fan and get a quality SPAL of FAL fan. You'll never look back, I guarantee it. Pair a good SPAL fan with the stock pusher and you should be good.

If I kick on my A/C at idle and let it run, my 2 fans being constantly on will pull the coolant temp all the way down to what the T-stat is rated at (180*).

I've worked through my fair share of cooling issues, and I feel your pain. I don't think I've seen 216* since I worked out my own cooling issues, so running hot can definitely be corrected if you take the right measures.

Stock temperature is fine.