here and i was stuck riding a moped to school 10 miles away that i had to buy on my own instead of use the city bus and make 3 transfers.

 

Don't worry he still probably will need to get a bus pass since there's no guarantee it will even run after 6 years of work

 

THAT IS THE TRUTH FOR SURE, ESPECIALLY IF I WORK ON IT

 

Ahem.

 

hey now I used to do that and live near seattle.....
only had 1 issue from the hood scoup and it wasn't rain , a small seed/thing from a tree went through the scoup, and landed between the throttle stop and made the car idle get stuck at 4K lol

 

You couldn't make that happen again if you tried! I hope you bought some lotto tickets after that.

 

verts have aluminum hoods, well all but mine.

 

The NA Rx7 has proven itself to be a pretty reliable daily driver. Although a scoop dumping water and dirt on your alternator has potential to change that.

 

then yours was changed with a non vert one

 

Not necessarily, Mazda built these cars in small runs, and was known to use whatever was on hand. Therefore, some NA cars (besides the GTUs) got aluminum hoods, and some verts and turbos that should have got aluminum hoods got steel ones.

The weight savings of aluminum is often exaggerated - I've weighed both, the difference was 12lbs. That's 12lbs that's worth saving, and it feels like a tonne raising and lowering the hood, but it's less than is commonly bandied about.

I had a turbo hood on my NA for 10 years - I don't care about the "fake turbo", I wanted weight reduction, and as an added bonus the cool air hits the plenum, and the NA likes cool intake air, and it generally keeps underhood temps quite a bit cooler, even just from convective cooling after shutdown - which I figure is valuable for preserving the vacuum lines and electrical. I drove lots in the rain, and never had problems with wet electronics, the air/water comes in too far back to hit anything important. No real issues with extra dirt either.

The only reason I removed the TII hood was it got pummelled with hail last summer and looks awful. I'd like to replace it with an aluminum hood, NA or turbo, and would frankly prefer TII, for the cooling benefits, but I have a steel NA hood that matches the car, so that's what's gone on it for now.

 

take the steel hood off..get an aluminum hood.Steel hood make great Sleds behind snowmobiles..hold about 6 kids at 60 mph..until you skid into a tree!
Take the exhaust off..don't need it.Mufflers catch bodies when ya run over people!
Put your fat *** on a diet,.,don't need that fat ***..Then your *** will go fast..no turbo..lol!
Spoiler alert...park benches can be stolen around 2am as long as you roll the homeless guy off them without waking them up!

I like the scoop and spoiler look though..ONLY if the eventual intent or the reality of an engine to support that "fast lookin machine" is there,.
Otherwise,just a spoiler..heh,heh!

 

All rotary engine power depends from airflow equal turbo or na, so what's the problem.
Sometimes to support Na monster bridge port engine, heh,heh!

 

I have a vert with a steel hood too. Thought I was the only one.

 

the airflow benefits of the turbo hood in this thread are BS and highly exaggerated.

 

99% of the time to support a sub 180whp grocery getter, making less difference than what the driver ate for breakfast.

 

seem to me the only thing that the hood would do is feed the top mount intercooler on the Turbo engine.
If the car was N/A then Personally I am thinking that the air would just enter and make it's way to the Firewall...Slam..and out the bottom of the car.

Then again If I sit here all day thinking of the air flow of a TII hood I should be delving into the theory of evolution..To that I say "screw it..pass the cheetos"...and then post a thread to ask why there are orange handprints on my GF's bum....

 

Unless it was somehow ducted into the intake, but I think that would be a lot of work to properly implement and provide zero tangible gains.

 

There are a lot of easier ways to deal with the intake than a hood scoop.

 

No, underhood temps stay very noticeably cooler when I had the TII hood on it the NA - when in grid at autocrosses, I used to routinely sit with the hood up, or else the intake would get too hot to touch, and power fell off noticeably in later runs. This was not so with the TII hood - the intake might get warm but never uncomfortable to touch, and power didn't fall off after multiple runs, even if I left the hood down in grid. It was a dramatic difference. Before the turbo hood, I'd put ice and cold water on the plenum and TB to keep it cooler, and I stopped bothering, because it didn't make any noticeable difference after.

Now, on a TII with the original top mount, I can see there being little to no cooling benefit, because the big hole in the hood is plugged with the intercooler, but on an NA, that's a hole that pushes air in while in motion, and lets it out while stopped. Again, not that my main purpose in putting a turbo hood on was cooling, it was weight reduction. But it made a difference in engine bay temps, though not coolant temp.

 

What you describe here is passive cooling, the turbo vent is just allowing the hot air to rise up and exit the bay. You could achieve the same, if not better, results with some strategically placed holes in the standard hood.
The question in my mind is, what does the turbo vent doing when the car is moving and there's positive airflow in the engine compartment?

 

or by doing the ricer mod of jacking up the back of the hood, which does vent the heat much like the TII's stove pipe.

 

I can see that working at rest but that area is high pressure at speed and at some point, it probably hurts you.

 

i can't see it working much worse than the stock TII hood, we did it and noticed some of the same effects rx7racerca mentioned. oh and that was with a TII hood, because it was still heat soaking. but we're talking about a 500whp turbo car, not a 150whp n/a.

 

You mean speed holes?

 

Yup.