hello everyone,

I drive an EG hatch with a GSR motor and tran with a precision 6266 turbo setup and i am having a lot of trouble while cruising at highway speeds. My rad keeps getting to 215+ temps.

Ive replaced or added the following:
SPAL fan
new thermostat 150 degree
new water pump
new temp sensor
flushed rad
water wetter + OEM honda coolant
fog light vents
wrapped downpipe
turbo blanket

Nothing seems to be helping. I think it might be an airflow issue but I'm just looking to see what you all would try next. I know my intercooler blocks quite a bit but i have looked at many other builds and they all seem to be very similar to mine.

 

if you have already removed the front crash support beam, you can drill holes in the front bumper to allow air to cool down the radiator.

 

From the picture I can't see a shroud on your radiator. That would mostly affect low speed/idle temps, but still.

Specifically what SPAL fan do you have? 30102029 is the ideal one you want.

Most importantly, making an air dam where your AC condenser is supposed to be will be pretty crucial to direct air into the radiator at highway speeds. If you just have an open gap where the condenser used to be, you'll need to find a way to block it off.

Cooling plate on the top of rad could help a little too.

 

That top mount manifold is what's likely killing you - long runners have tons of surface area from which to radiate all that heat. Here are my suggestions:

• Wrap the manifold
• Use a fan shroud
• If not already done, wire in a relay with 40A fuse and 10 AWG power and ground wires for the fan
• Which EMS are you using? If Hondata, make the fan come on at 180F and stay on up until 90 mph.
• The gap between the core support and radiator looks big - this could be letting air leak around the radiator.
• The lack of AC condenser is also a big low resistance path for the air to go around the radiator. Consider making a block-off plate to help direct air into the side with the radiator

 

looks like the rad support has a little section cut out, creating a large gap between rad and rad support.
get the adhesive foam to seal off the gap, and def need a shroud.

fit a larger radiator. if space is an issue, look into a larger tucked radiator and swirl pot.
also, an electric water pump may be worth looking at

but most def..wrap up the manifold and dp

 

Take off the bumper and drive the car and see if you notice a difference with cooling then u will Know of its a air flow problem

 

Wrapping that manifold will definitely help.

 

As others have put, it seems like there is a gap between the radiator support and your radiator which means the air isn’t directed to go through your radiator, it’s going around your radiator. And you don’t seem to have a fan shroud which means the radiator fan is just blowing air around in all directions.
Solutions could be to fill that gap with a plate between the radiator support and the radiator which would direct air through the radiator. Wrap the manifold to reduce under hood temperatures. Look into getting a fan shroud to pull air through the radiator.

 

Add a hood vent.

Gotta let that heat out. Or make an really good efficient shroud for the radiator.
Wrap or cerakote the hotside parts.

 

These also aren't bad ideas but I'd 100% definitely address the massive hole left by the AC condenser and close the gap on the top of the radiator as well with a plate of some sort. Overheating at highway speeds is definitely a giveaway that he has poor airflow through his radiator.

I like this one - https://www.circuithero.com/products...te-92-00-civic