As we all know, heat can be a constant battle with these cars as we search for more power.

With that said, I tried a little trick I used on my 99 Si.

I was surprised @ how well it worked, I know this b/c I can monitor my IATS & coolant temps via my trusty AEM serial gauge.

Without further ado, simply remove the weather stripping that lays on the top of the firewall where the back of the hood meets the car.

It has a handful of clips that hold it in place, and if you GENTLY pull it up, you will see them, they are easy to remove. NO tools needed.

This allows the hot air an easy to escape and keep your engine bay a few degrees cooler. OF course it's not as effective as adding a vented hood, but it works better than I had thought and it's FREE..lol.

I've dropped my IATS a fair amount, although your results may very.

Enjoy.

 

DANG i was with you until you said maybe not as well as a vented hood hahaha... every little bit helps i guess...

i did the vented hood mod and cut out the holes in my hood which seems to help alot...

but i may just do this too for added cooling...didnt even think about this...

THANKS!!

 

since you monitor with your serial gauge, what are some before and after temps?

 

It dropped IAT's more than coolant.

Coolant was in the 185 range. now 183-4 Only saw a degree there.

But in the IATs, it dropped a fair amount.

I had the warning set on the IAT @ 120, and it was always setting it off.

Since then, I haven't had it go off once.

Usually around 109 cruising I want to say.

I've been wanting to post this for a few weeks, just kept forgetting.

Then yesterday I was out working on the car and reminded myself to post it today.

 

nice work, i remember reading about this on another forum... a couple of engineers on there said that there will be turbulance created when the air travels over the hood and will acutally curl and suck back in instead of out because of the negative airpressure. so they concluded that heat will escape when the car is at idle but air but will not escape from the engine compartment unless there is an air guide coming in--something like a v mount\vented hood setup... but its hard argue when you have proof it works, thanks for sharing!

 

U can also add washers in the rear to angle the hood to vent more air out.

 

You can, but that looks gay imo.

 

was only talking about this on saturday, my next plan

 

None the less this may or may not be true but i know with my set up at least i heat up most at idle so this would seem to me to be a good option while driving it seems to stay fairly cool.

 

This is an inexpensive way to do what you just said. Works great with cars and motor swaps that are tall as well.

Aluminum Hood Spacer Bushings