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-   -   cheap mod's for any car.... rumors, myths, tell them all (https://www.rx7club.com/race-car-tech-103/cheap-mods-any-car-rumors-myths-tell-them-all-643587/)

j9fd3s 04-22-07 12:01 PM


Originally Posted by peejay
Boy, glad you told me that it's a myth, given that I discovered it accidentally and later scientifically verified that it works and all. So, when the needle is pointing at the oh-shit line 2/3rds of the way up, and then when I pop the hood and it drops down to about 1/4 up, that means it is running hotter?

There is a high pressure area in the center, however the edges and the corners are definitely in a low pressure area. On my '80 you could watch this on the highway, over 75mph the corners of the hood would lift a half inch!

yeah at highway speeds the 1st gen hoods sometimes life up and flutter in the air, its kinda scary when you're 17!

j9fd3s 04-22-07 12:02 PM


Originally Posted by scathcart
And when you get in a front-end collosion, the hood comes through the windshield and decapitates you. Instant 10 lb weight reduction.

and its up high too!

JG7032 04-22-07 01:55 PM


Originally Posted by speedturn
Fill your tires with Helium and make your car lighter :rlaugh:

hey man, I ride bmx and this is an old trick when trying to out jump your buddies at the trails. it's good for about 1.6-1.8 lbs on a bmx bike. As far as heat cycles and such on a car, hmmmmm, yeah that wouldn't be too good. :iwstupid:

speedturn 04-23-07 11:48 AM

peejay is right. When the hood is unlatched, it raises up about 6 inches, and it changes the airflow across the hood and across the windshield. Pressure graphs of an FC with the hood closed does not apply to an SA or FB with the hood unlatched.

On a stock SA or FB, their is a lot of air pressure in the engine compartment and the hood will raise up if unlatched, AND drag will decrease and top speed will increase about 3 to 5 mph.

On an SA or FB with a full ground hugging race airdam, there is less air pressure under the car and more air pressure on top of the hood than a stock bodied car.

DamonB 04-23-07 12:33 PM


Originally Posted by speedturn
On a stock SA or FB, their is a lot of air pressure in the engine compartment and the hood will raise up if unlatched

The rear raises up because it's hinged at the front. High speed air over the top of the hood creates a low pressure area above the hood. Hood rises up. Same reason airplanes can fly.


Originally Posted by peejay
On my '80 you could watch this on the highway, over 75mph the corners of the hood would lift a half inch!

I would guess because the latch isn't in the corners but in the middle...

w33n 04-23-07 05:55 PM


Originally Posted by speedturn
:lol: Put High octane racing gas in your naturally aspirated rotary makes it go faster

Yea and put a plastic electrical supercharger on it.

ZenkiFcKin 04-24-07 06:07 PM

and one of the velosity tornado tubes in your intake tubing too.. lol.


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