heat dissapation

[immortal1kon]

hey guys lately in this hot weather when i drive my leggy i realize that the engine bay heats up alot. and i have been doing some R&D on some hood shims which would be installible between the hood and the hinges so that the back of the hood was angled up by .5 of an inch or however much the stock latch assembly would allow.

i am to draw some up using inventor and hopfully find a good way to make them. i believe it will help with alot of small and unoticable things like less heat under the engine, more smoother flow of air over your car, slightly more agressive look.

i guess im just making this to get some feed back on if anyone would be interested in such a thing or if it is even worth doing.


p.s. i know on the gc impreza you they have radiator shroud covers , has anyone attempted to construct one for the bd? if not would anyone have any interest in one ? i am also looking into build one and if successful i will update at a later time.

[Reason]

Zerosports makes them for 2nd gens. If you find somebody who sells them in the states let me know. I have a cusco one but I'm not sure it will work.

[immortal1kon]

risers or a radiator shroud cover?

[Reason]

Radiator shroud

[2.5GT]

how's the radiator shroud directs air flow? it goes right on top of the radiator and sandwiched between the radiator and hood? where's the airflow coming from if everything is block?

[immortal1kon]

this thread was susposed to be more abotu the hood shims.... hahaha any interest in that at all ?

[Mikey97D]

That's an interesting idea immortal1kon. So this will look sorta like a cowl induction but with the entire back of the hood propped up near the windshield? What about the sides of the hood? Will there be a tapered gap running up the edge?

[Huffer]

Hood shims basically just raise the rear edge of the hood.
You can do the same thing with a spacer or washers...

[immortal1kon]

That's an interesting idea immortal1kon. So this will look sorta like a cowl induction but with the entire back of the hood propped up near the windshield? What about the sides of the hood? Will there be a tapered gap running up the edge?

yup basically but not anything insane... just maybe a 1in or 1.25in at most. and yes huffer it is similar to using spacers but i figured making a one piece shim style would be allitle safer than just using shims. plus i was thinking of going with solid abs plastic material and haveing an angle in the shim.... still in development haha

[Huffer]

You could machine a spacer out, cut a triangular wedge piece and then drill a hole through the wider end.
Hit it with some paint and silicone, and you're good to go.

There's a guy in SoCal that's done it, it looks interesting.

I'm still trying to figure out how to make the hood flip up in reverse.

[chuckthefuk]

I had to shim my hood to fit my GC8 GReddy strut bar. I used 3 washers on each side by the hinges. The bolts had enough thread to support the extension, but in any case if your worried just stop at a hardware store and grab longer bolts and some stainless steel washers.

You could find a CNC'd spacer kit but for the price its not really worth it.


Also if you need a bit more air flow you can raise the bump stoppers in the front of your hood. Just turn them counter-clockwise to raise them.

https://sl-i.net/FORUM/
https://sl-i.net/FORUM/
https://sl-i.net/FORUM/

Cheers
-Chuck

[track8]

You will be playing with aerodynamics in ways that are dubious at best if you raise the rear of the hood. The area at the base of the windshield is a high pressure area so air will be inclined to go in through that opening. That is why "Cowl induction" works. So now you've created a higher pressure zone under the hood, and the air wants to go somewhere, either under the car, creating lift and drag, or maybe out through the new gaps between the fender and hood.

You will have more airflow in the engine compartment, but to what end? Are you melting things? It's supposed to get warm under there, that is what engines do.

I vote not to do this, a rear facing vent just above/behind the radiator is more effective and less likely to change high speed aerodynamics in any bad ways. This one http://www.carbontrix.com/store/index.p ... ucts_id=91 (http://www.carbontrix.com/store/index.php?main_page=product_info&cPath=2&products_id=91) has proven popular and effective on road race oriented DSM's and they are notorious for underhood temp's.

[immortal1kon]

i talked to a few more people and alot of what track8 says is right. i talked to a few people who have done it and they explained to me how the design is for the air to go down and that it would just lift the hood if anything and get sucked in instead of my ideal version where it would expell through the extra gap. and the hood scoop that you showed me does it fit on the bd hood? looks kinda cool, would there be cutting involved ? hey atleast i didnt waist too much time on this.

i know this is off topic but would the gc anti lift kits fit on a bd and does it even have a positive effect?

[immortal1kon]

oh and you definately tond want to make the hood open from the front.... thats just pointless because you loose a large area to work on the car. plus why not keep it out of the since you cant utilise the windshield area haha. you should try drilling a hole where you can have a honda style hood. they can be propped all the way stright 90 degrees up and out of the way. it's much better. just my 2 cents

[track8]

I believe that vent is flexible enough to fit a lot of applications, they also make a narrower one. There would definately be cutting involved.

I noticed while watching the Tour De France, the team cars have a huge, ugly vent in that spot, likely since they are moving slowly and in close packs.