Rx-7Blazin

hey has anyone seen the hood on the red fc in the super street magazine?? if so how can you do this? are there any kits? seems like a pretty usfull way of dispersing heat and it doesnt always have to be up, if you havnt seen it here is a pic of one
http://page.auctions.yahoo.co.jp/jp/auction/54192410

blue90conv.

It's been a while since i read the article but from what i remember i think it was a prototype car and the company that made it was fabricating their own kit that could possibly be available soon.

Just goin off memory though so i might be wrong.

Center of The Universe

I'm sure you could make a manual one that you put up by hand fairly easily..

Looks neat, and definately an awsome idea.

Relisys190

iTrader: (4)

ALOT of Japanese cars have this. as it serves a useful purpose

We all know when air comes in thru the radiator it has no where to go... so it's usually vented out the back of the hood (near windshield) most car companys that do this mod (back of hood slightly raised) so that air (hot air) can be vented more efficiently.

It would be easy to make. look at your stock hood mounts. simply put an extension plate to raise the back of the hood about an inch or so.

I am planning on doing this on my car. very helpful for hot air to escape...

-Markus

poor_red_neck

Ok, this is probably a stupid question....
but how would this help with cooling on the track? AutoX to be exact.....

My local track is VERY curvy.... speed usually never over 100 with a FC. Most of the time its around 40-70. For a 5 or 10 lap race, will this help? or does it need constant high speed to be efficient?

Relisys190

iTrader: (4)

well, it should be pretty easy to make.. go to home depot/lowes whatever. and get a plate of aluminum... maybe 4"x2" you get the idea. Bolt it up to the regular hinges (stock original hinges) than mate it to your hood. It would thus raise the back of the hood 1" - 2" - 3" what ever size you make/buy the plate. just dont raise the back end up to much, than it would look broken/stupid... But... I think this idea would work great for getting rid of unwanted engine bay heat. and, i think it acctually looks great. (just my opinion though. what do you guys think about the pop up hood? START A POLL!! hint hint...

P.S who thinks that car is badd ***!

-Markus

1SlowRX7

All I did was use longer bolts and put some thick washers between the hood and the mount.. More in back, less up front. I also removed the rubber strip the back of the hood rests on. One downfall I've found from that, is when it's colder outside, my windshield fogs up bad and I have no heat or a/c, but when there is ice on the windshield, hell the extra heat helps to melt it quicker.. LOL

Sean_O

This is slightly off topic, but does anyone have any idea as to what kind of rims those are on the yahoo.jp link? Or maybe a suggestion for something similar?

Rx-7Blazin

ill start a poll i just need more pics of theses pop up hoods anyone have any??? and for the rims those are pretty bad id lkine to widen my car like that one, it looks like he got his fenders pulled out a little

SureShot

Wait a minute - has anyone seen the pressure profile on the 2nd gen RX-7?
The cowl area at the base of the windshield is a (high) pressure area at speed.
It will exhaust heat only when standing still, or crawling in traffic.
If you want to exhaust heat - go to the low pressure area about 1 foot behind the leading edge of the hood.

SureShot

Most of the engine heat comes out under the car, which is why a chin air splitter or front air dam helps..

Center of The Universe

Well its not like heat dosen't rise. That if anything will push air out.

SureShot

LoSRx7

http://www.aerodyne.net/RX7.htm

Scroll down a bit

Icemark

Uhhh yeah, right. That is why there is a factory gasket between the hood and the firewall all to prevent the hot air from being forced out of the top of the engine compartment and onto the intake for the A/C and the windsheild...

Its a simple ricer mod, that doesn't help a thing other than make the A/C work harder.

Modern engine compartments are designed to keep the hot engine air away from the windsheild and climate control intake and to force the engine air out under the car to help cool the tranny and rear end.

SureShot

Notice the big vent about 1 foot from the leading edge of the hood? That's the heat outlet when you are at speed.

Here is a simple test.
Set you cabin vents for outside air with the fan off.
Cruise along at >40MPH.
Feel the air comming out the vents?
Now find the ram air inlet. - - See what I'm saying?

Relisys190

iTrader: (4)

i just dont get it. Why would all the jap tuning company's do it? to look rice? I've seen them, Feed, RE, pan speed... almost 40 % of those compay's use that hood configuration on their cars... there has to be some purpose. I dunno, maybe i'll try it, if i dont like it , i'll take it off

-Markus

SureShot

The trade-off is maybe around 35MPH.
Below that hot air can escape at the cowl.
Above that, it becomes a ram air intake.

Relisys190

iTrader: (4)

so.. is it good, or bad.

Ram air. meaning above 35 mph air acctually would enter? that area of the hood? hum.. absolutly strange. Prolly works wonders with a carb set up huh.

SureShot

Next Sunday turn on the NASCAR race and notice where the big $, wind tunnel tested stock cars put their intake.

Scott 89t2

ya all those cowl hoods you see on v8 cars. with the scoops facing backwards are INTAKES... air goes in backwards.

you'ld probably get air comming out the sides of the hood though which would help. and maybe the air entering the back of the hood helps push the other air out the bottom better ? I don't know.

I'm still waiting for my reverse hood scoop arg.. should have been here so long ago.

Relisys190

iTrader: (4)

ok, how about this, i'm an n/a guy, and i'm always looking for more AIR

you know the large 3 foot long plastic intake tube on the n/a's? well, tell me if this would work... or maybe i'm just an idiot. Do the hood mod (pop up back like a cowl induction) than mount the AFM (mass air flor sensor) directly to the throttle body.. (i have removed my charcol canister...cruise control... and cold start assist tank. so theres room for the cone filter in that area. make a metal/aluminum PLATE/shield to go under the filter... to protect from exhaust heat... WOULD THIS WORK? or i ask again, am i an idiot

Let me know what you guys think.
- Markus

I'm being serious. would air get into the filter better?

Center of The Universe

Thats like saying: "Next Sunday go beat your self with a ugly stick."

SureShot

OK OK - But you do see what I mean about ram air pressure at the cowl.

Center of The Universe

Yes.. Yes i do.