Thread: hood spacers anyone doing this

i have a koyo radiator,nismo thermostat, aftermarket rad cap,flexalite dual fans, you are right all the fancy stuff doesnt actually do anything to keep the heatsoak down and vent the hot air out. i am not really putting much thought into it, where as alot of ppl say it messes up the lines of the car and all that, i have driven my car to work a few times, its a 45 min drive, i do a few little boost runs here and there, and when i get to my work, my valve cover and hood and bay are barely hot, nowhere near as hot as it used to get, so for me its here nor there as long as it works

this will do NOTHING. go to nissan and buy brand new hood bump stops. these are the rubber things in the front corners of your hood (that you likely dont have any more via old age/rubber rotted)

jen36 had this problem and i made him come to my dealer and buy them and i installed them. they screw in and you adjust them untill the rattle stops.

yes do that^^^ the 15 bucks was worth it!

We can

I would need to see it again. But we are trying to get a group buy detail gig set up somewhere in florida. We are gonna drive out to where the most cars are and spend a day detailing them. I think we can make it alot better. PM me if your interested

I was lurking on Hybrid Z and struck gold:

Undertrays, Spoilers & Bonnet Vents, Part 1

Undertrays, Spoilers & Bonnet Vents, Part 2

Undertrays, Spoilers & Bonnet Vents, Part 3

Nice find.... but did they use washers? HA!

They don't get into hood spacers, but based on their findings, the back of the hood is a high pressure area. The whole article is about maximizing high pressure/ low pressure differential to get air to flow the way you want.

The engine bay is supposed to be a low pressure area, so the high pressure air at the front of the car (radiator, intercooler, etc) wants to go into the bay. So if the back of the hood is a high pressure area, and the engine bay is a low pressure area... I wouldn't be at all surprised if air was actually flowing into the engine bay when the car is at speed.

I'm sure that would help cool the intake manifold, piping, and anything else in the engine bay... but it would raise the air pressure inside the bay, reducing the pressure differential through the radiator/ intercooler. In other words, it may cool the engine bay itself, but reduce the airflow through the radiator/intercooler. Even if you're losing rad/IC efficiency, you may still run cooler by keeping bay temps down, but that's likely how the air is actually flowing.

The most effective setup they found, was a good undertray (a splitter would be even more effective), coupled with a vent as close to the front of the hood as possible (like an Evo vent).

Great find Swiss!

i have always done this to my hondas, and i like the looks on it, and have done it to my b13 as well, soo its F*** Y** Haters LOL

I've seen this waaaay back when my dad had his Datsun.. I hang out with lots of classic, and hot rods guys here by work, and i've asked around about this, and it works. i'm going to prop mine up.. I rather have hood prop than a vent/scoop.. I don't want water in my engine with a vent or scoop, or look ricer, rather look umm hot roddish..