T ii hood or not to tii hood that is the question, just for discussion purposes
03-24-17, 12:03 PM
#28
Senior Member
Thread Starter
03-24-17, 01:29 PM
#30
Unless you're one of the loons who drives a 30 year old sports car daily, and lives in Seattle, I wouldn't worry. I have a Sexy Style hood on my TII, and water has gotten into the huge vents on several occasions.
Not saying things can't and won't happen, but there's not much to be concerned about with the exception of the alternator.
Not saying things can't and won't happen, but there's not much to be concerned about with the exception of the alternator.
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
03-24-17, 02:00 PM
#31
Originally Posted by KompressorLOgic
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
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
I hope you bought some lotto tickets after that.
03-25-17, 04:18 PM
#35
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.
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.
03-26-17, 01:05 AM
#36
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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!
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!
03-26-17, 01:17 AM
#37
Full Member
Sometimes to support Na monster bridge port engine, heh,heh!
03-26-17, 10:15 AM
#40
Originally Posted by Rx7fb spirit r
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!
Sometimes to support Na monster bridge port engine, heh,heh!
Originally Posted by RotaryEvolution
the airflow benefits of the turbo hood in this thread are BS and highly exaggerated.
03-26-17, 12:52 PM
#41
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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....
03-27-17, 03:53 PM
#44
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.
Last edited by rx7racerca; 03-27-17 at 04:13 PM.
03-27-17, 05:37 PM
#45
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?
03-28-17, 12:56 PM
#48
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.
04-03-17, 07:45 PM
#49
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?
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?
You mean speed holes?