Hood Risers for heat venting (1 Viewer)

[Outsane]

I made some hood risers to help vent some of the engine bay heat.

This is a nice alternative to cutting holes into your hood. Slots are added so you can install by your self a little easier. Bolts are included.

I have had no issues with the hood latch. Credit to Land Cruiser Phil for the suggestion.

FJ80 LX450 FZJ80 Hood Vent Risers

Hood Vent Risers These mount to the hood hinges with provided hardware to allow more air flow to the engine bay. The slots are provided to that a single person can install with out completely detaching the hood, Simply remove on bolt, and replace with the longer provided bolt and thread in...

solvefunction.com

 

[Outsane]

Oh an I went up the grape vine last week mid day, 55mph ac on, fully loaded, temps stayed below 200 deg.

 

[Cruzerman]

Oh an I went up the grape vine last week mid day, 55mph ac on, fully loaded, temps stayed below 200 deg.

What were the temps before the risers?

 

[Outsane]

Usually around 212 on steep long grades, and I would turn off the ac. I do have an upgraded fan clutch

 

[1911garand]

What a simple and effective way to get heat out from under the hood (inexpensive too).

I did some work down in New Orleans in the dead heat of summer a few years back. We drove v6 s-10 chev trucks and used them to survey city streets - slow driving, idling, and load pulling. The direction from the vehicle provider was to simply "pop the hood" to keep the trucks cool. It worked. We just drove around with the hoods on the safety latch feature of the hood latch (not safe for driving at speed).

 

[YotaTrail]

Would it be possible to make it be controllable from the cabin ? For example using a little airbag and inflator.

I would want to be able to control when to have it and close it in a down pour

 

[Outsane]

@YotaTrail yeah that could be done, might be pretty expensive.

I have noticed that my entire engine bay gets wet in the rain before I added the risers from below the engine and from the radiator, so I don't imagine any new issues with the risers.

They can be removed for winter months if you wanted in about ten minutes.

 

[Outsane]

@1911garand nice! New Orleans in the heat sounds a bit uncomfortable.

 

[Railwelder93]

You could find a 1-2in stroke linear actuator for each side. And make a bracket to incorporate it into the hinges. Not something I would ever need to do, just a thought.

Or whatever bolts hold the hood to the hinge could be replaced with longer bolts with springs to pull the hood down unless pushed up by the actuators.

idk just thinking out loud

edit: the actuators could just be mounted to the firewall if you did the longer bolt and springs on the hinges.

 

[Rwhat]

I thought someone did something similar 10+ years ago and didn’t notice a difference in temperature. I could be wrong though. Did you happen to notice any difference in the intake air temperature sitting in traffic?

 

[surfpig]

What a simple and effective way to get heat out from under the hood (inexpensive too).

I did some work down in New Orleans in the dead heat of summer a few years back. We drove v6 s-10 chev trucks and used them to survey city streets - slow driving, idling, and load pulling. The direction from the vehicle provider was to simply "pop the hood" to keep the trucks cool. It worked. We just drove around with the hoods on the safety latch feature of the hood latch (not safe for driving at speed).

I used to wedge rocks under the front of the hood on my old clunker car years ago. Strapped the hood down securely. It kept engine temps cooler on the long grades driving into the desert and the Sierra.

 

[AndrewInf]

In a previous life I restored an early Datsun 240Z and semi-daily drove it in hot central Texas. The hood on the 240Z opens the opposite of normal, lifting forward, so there was little risk of the hood blowing open when it was on the safety latch only even at highway speeds. On some 105+ degree days I'd be stuck in slow moving traffic on I-35 and see the temperature needle climbing, popping the hood to sit on the safety latch and creating a rear gap just like this had a noticeable impact on the temps.

@Outsane are the stock hood bolts long enough for this? How many threads of engagement are left on the hood side? Is that the thickest you can go? I'm surprised the stock hood bolts would be that long.

 

[Outsane]

@Andrewlnf I love all these first hand memories.


The stock bolts are not long enough for these risers, I made these risers 19mm tall as suggested by @LandCruiserPhil Longer bolts are supplied with purchase for installation.

I can go thicker or thinner, would just need to the appropriate bolts.

 

[Bryan Smith]

I was just thinking about this when my EFI relay overheated. Like others I did this on my 88 Prelude. Thanks for making these!

 

[Outsane]

I was just thinking about this when my EFI relay overheated. Like others I did this on my 88 Prelude. Thanks for making these!

With the pop up headlights and rear steering....

Sweet ride!

 

[joxeale]

When you add these is it a little bit "trickier" to make the hood latch on front? I would think the angle might cause an issue (may be super wrong haha). It's a great idea, you guys make really cool stuff

 

[toyofan]

great idea , but I hope you never get into a front end collision...

 

[koifish]

Been looking for something like this @Outsane. Ordered and thanks!

 

[Outsane]

great idea , but I hope you never get into a front end collision...

Me too, but I dont see how this would have an effect on that.

 

[toyofan]

Me too, but I dont see how this would have an effect on that.

I guess it would be possible for the hood to come flying to the windshield on a front end collision... the angle on that picture looks way to creepy to me