OEM vented hood
06-15-07, 11:57 PM
#53
toeachisown
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Negative. It's not "colder outside air displacing hot inside air"; it's the fact that the area in front of the windshield is a higher pressure area than the engine bay.
When airflow speeds up over a surface, it creates a lower pressure than an adjacent surface where airflow is slower. In order to flow up over the hood surface, airflow has to speed up to match the airflow speed going underneath the car, which is basically flowing straight. However, once that airflow hits the base of the windshield, it immediately gets slowed down and builds up in front of it, creating a high pressure zone. This is the reason that NASCAR racecars made use of that high pressure zone by positioning ducts to feed the intake from that area. Once the airflow starts flowing over the top of the windshield and over the roof, it begins to speed up again.
When airflow speeds up over a surface, it creates a lower pressure than an adjacent surface where airflow is slower. In order to flow up over the hood surface, airflow has to speed up to match the airflow speed going underneath the car, which is basically flowing straight. However, once that airflow hits the base of the windshield, it immediately gets slowed down and builds up in front of it, creating a high pressure zone. This is the reason that NASCAR racecars made use of that high pressure zone by positioning ducts to feed the intake from that area. Once the airflow starts flowing over the top of the windshield and over the roof, it begins to speed up again.
Interesting.......
06-16-07, 01:42 PM
#54
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i know there is alot involved in temp. change but i did notice somewhat of a difference without the weather strip when driving today. i noticed a quicker drop when cruising. or maybe i'm just ignorant and i'm seeing past the truth of the matter...i'm open to flaming today
06-17-07, 04:02 AM
#56
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FOR THE LAST DAMN TIME, removing the weatherstripping or other retarded practices like propping the rear of the hood up DO NOT WORK. Wargasm even did complete testing using thermosensors in the engine bay....
You wonder why so many of the veterans left this forum over the last few years? This kind of crap is it. People would rather copy some 20-year old morons in their riced-out 240SXs than listen to people who actually know what they're talking about!
Sorry for the rant, but it gets a little old seeing this same **** over and over....
You wonder why so many of the veterans left this forum over the last few years? This kind of crap is it. People would rather copy some 20-year old morons in their riced-out 240SXs than listen to people who actually know what they're talking about!
Sorry for the rant, but it gets a little old seeing this same **** over and over....
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Tim Benton (10-05-18)
06-17-07, 05:34 AM
#57
4 rotor 964 lol
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FOR THE LAST DAMN TIME, removing the weatherstripping or other retarded practices like propping the rear of the hood up DO NOT WORK. Wargasm even did complete testing using thermosensors in the engine bay....
You wonder why so many of the veterans left this forum over the last few years? This kind of crap is it. People would rather copy some 20-year old morons in their riced-out 240SXs than listen to people who actually know what they're talking about!
Sorry for the rant, but it gets a little old seeing this same **** over and over....
You wonder why so many of the veterans left this forum over the last few years? This kind of crap is it. People would rather copy some 20-year old morons in their riced-out 240SXs than listen to people who actually know what they're talking about!
Sorry for the rant, but it gets a little old seeing this same **** over and over....
I was told by a Japanese friend that the Japanese phase of doing this in the mid 90's was stopped once a person got in a front collision with his car,
and the hood actually did not crumple correctly and took a huge chunk out of the guy's face.
And referring to your comment about vet's leaving the forum... I have been debating doing the same, but there really is nowhere else to go in terms of discussion other than here.
lets clean up the idiocracy guys !
06-17-07, 06:09 AM
#58
Banned. I got OWNED!!!
My SP rx7 with OEM vented alloy hood, originaly made for M1020 prototype and RZ rx7's it was further modified by mazda australia with minature carbon fibre *sierra cosworth style vents* in back corners. Works a treat and looks, well as Paris Hilton would say after de-loucing in prison "thats HOT"!
06-17-07, 06:19 AM
#59
Banned. I got OWNED!!!
Some more detailed pics of the hood and carbon vents instaled, CLICK on picture you like to see full size/detail
[QUOTE=RICE RACING;6274375]some more
[URL=http://img182.imageshack.us/my.php?image=rx7spmazda011wa0.jpg][img]quote]
[QUOTE=RICE RACING;6274375]some more
Originally Posted by Craysus
[URL=http://img182.imageshack.us/my.php?image=rx7spmazda011wa0.jpg][img]quote]
06-17-07, 10:53 AM
#61
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FOR THE LAST DAMN TIME, removing the weatherstripping or other retarded practices like propping the rear of the hood up DO NOT WORK. Wargasm even did complete testing using thermosensors in the engine bay....
You wonder why so many of the veterans left this forum over the last few years? This kind of crap is it. People would rather copy some 20-year old morons in their riced-out 240SXs than listen to people who actually know what they're talking about!
Sorry for the rant, but it gets a little old seeing this same **** over and over....
You wonder why so many of the veterans left this forum over the last few years? This kind of crap is it. People would rather copy some 20-year old morons in their riced-out 240SXs than listen to people who actually know what they're talking about!
Sorry for the rant, but it gets a little old seeing this same **** over and over....
thanks... this s**t gets old indeed, along with sythetic oil questions, how long does the rotary last, cost of a 20b, and wheels falling off, ect... ok back on topic. proceed
06-17-07, 10:58 AM
#62
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I remember reading howard coleman thread a few years back... I would like to see that in person and really see what it looks like... If I were to have those vents I would have them welded in and smooth the eges to have it painted the color of the body... I think it would look good and very functional.
06-17-07, 12:16 PM
#63
toeachisown
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FOR THE LAST DAMN TIME, removing the weatherstripping or other retarded practices like propping the rear of the hood up DO NOT WORK. Wargasm even did complete testing using thermosensors in the engine bay....
You wonder why so many of the veterans left this forum over the last few years? This kind of crap is it. People would rather copy some 20-year old morons in their riced-out 240SXs than listen to people who actually know what they're talking about!
Sorry for the rant, but it gets a little old seeing this same **** over and over....
You wonder why so many of the veterans left this forum over the last few years? This kind of crap is it. People would rather copy some 20-year old morons in their riced-out 240SXs than listen to people who actually know what they're talking about!
Sorry for the rant, but it gets a little old seeing this same **** over and over....
hahahha..but as long as there is a forum, you are still gonna see the same **** over and over. i'm sure pretty much everything about the 7 has been covered in here thoughout the years and i'm sure it will be covered over and over again, regardless of the search option. you guys are way too sensitive. some people actually like to experiment for themselves instead of follow everyone elses findings regardless of the superior knowledge of others. i myself happen to be one...don't mean to jam up this thread with "ranting", just want to make my point...
06-17-07, 01:45 PM
#64
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Some of us care that this forum has a high standard for data and info and we try to dispel stupid crap like this.
06-17-07, 01:57 PM
#65
And they are welcome to do so, IF they actually follow a scientific method and provide data. What happens is you get a bunch of people saying "yeah, I removed the weatherstripping and my car runs a little cooler now". It's bullshit. No evidence whatsoever.
Some of us care that this forum has a high standard for data and info and we try to dispel stupid crap like this.
Some of us care that this forum has a high standard for data and info and we try to dispel stupid crap like this.
rynberg = supermod
06-17-07, 02:14 PM
#66
Banned. I got OWNED!!!
You and everyone else :P
With only 19 off the original 25 homologation cars in existance its by far the rarest FD, unquestionably the most exotic, not to mention the only one with a proven race pedigree which handed the worlds best sports car makers their ***'s on a platter .
Back on bonnets, you can buy replica SP "hoods" made from full carbon fibre, PM carbon man of this forum and I am sure he will help you out...... Its the only option nowdays as the factory stamped bonnet cannot be bought at any cost as mazda dont make them anymore and lost the stamp to produce them according to dmrh.
With only 19 off the original 25 homologation cars in existance its by far the rarest FD, unquestionably the most exotic, not to mention the only one with a proven race pedigree which handed the worlds best sports car makers their ***'s on a platter
.Back on bonnets, you can buy replica SP "hoods" made from full carbon fibre, PM carbon man of this forum and I am sure he will help you out...... Its the only option nowdays as the factory stamped bonnet cannot be bought at any cost as mazda dont make them anymore and lost the stamp to produce them according to dmrh.
06-17-07, 04:56 PM
#67
2/4 wheel cornering fiend
06-17-07, 07:58 PM
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i know there is alot involved in temp. change but i did notice somewhat of a difference without the weather strip when driving today. i noticed a quicker drop when cruising. or maybe i'm just ignorant and i'm seeing past the truth of the matter...i'm open to flaming today
06-18-07, 12:17 AM
#69
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hahah..rynberg, get over yourself. i respect you guys for knowing alot and i have learned alot on here. and i think someone in here is kissing rynbergs ***. but seriously, i have learned alot from this forum and i take in what i learn. i think what this forum is really filled with is smart *** comments or "stupid crap" i should say. and i think you are doing SUCH a great job at getting rid of it... keep up the good work rynberg! i'm not here to read this immature ****, i'm here to learn and maybe add a couple comments or so myself. sorry again for diverting from the subject at hand but, this **** is really starting to **** me off...
06-18-07, 08:35 AM
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So I take it...you're not open to flaming anymore?
The only thing rynberg did, was to tell you to NOT do $hit that is PROVEN to be wrong.
If anything, he (and others) advised you NOT to do a mod w/ the potential of chopping your head like a guillotine.
There are other mods that are proven to be wrong. Like the turbonator. http://www.turbonator.com/ Care to do it your way and see for yourself? Or are you going to listen to some people on this forum who know a thing or two?
The only thing rynberg did, was to tell you to NOT do $hit that is PROVEN to be wrong.
If anything, he (and others) advised you NOT to do a mod w/ the potential of chopping your head like a guillotine.
There are other mods that are proven to be wrong. Like the turbonator. http://www.turbonator.com/ Care to do it your way and see for yourself? Or are you going to listen to some people on this forum who know a thing or two?
06-18-07, 09:15 AM
#71
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So I take it...you're not open to flaming anymore?
The only thing rynberg did, was to tell you to NOT do $hit that is PROVEN to be wrong.
If anything, he (and others) advised you NOT to do a mod w/ the potential of chopping your head like a guillotine.
There are other mods that are proven to be wrong. Like the turbonator. http://www.turbonator.com/ Care to do it your way and see for yourself? Or are you going to listen to some people on this forum who know a thing or two?
The only thing rynberg did, was to tell you to NOT do $hit that is PROVEN to be wrong.
If anything, he (and others) advised you NOT to do a mod w/ the potential of chopping your head like a guillotine.
There are other mods that are proven to be wrong. Like the turbonator. http://www.turbonator.com/ Care to do it your way and see for yourself? Or are you going to listen to some people on this forum who know a thing or two?
. That aside, i did not and would NOT prop up the hood with washers because of that story. my curiosity was focused on something as simple as removing the strip, just to make myself feel better; not to provide detailed data for anyone else. just figured i would post a thought on it. but of course i knew that what kento posted about the lower pressure above the hood at the windshield was correct. i never for once doubted that knowledge. just one of those things i had to see for myself. like i said before, i read more than anything else on this forum and very rarely post on topics which provide info. you guys are the knowledgeable ones; it would be ridiculous to push that knowledge aside. sorry if it sounded like i did. i can't tell you how much i've learned on here, the amount of knowledge i've taken in is too great. this topic has pretty much exhausted me now. some of you guys(not naming) look at a couple words a person has posted and then go on to put that person down like he/she has not the slightest clue of what is going on. lets be a little more mature about everything guys.
06-18-07, 10:46 AM
#72
Back to hood vent pics
Okay, so this seems to be the thread now for vented hoods. I really like the Rice Racings SP vented hood. It will be very similar to what I'm doing. I might need to add the back vents like he did.
My progress: the hood vents have now been completed and the hood is painted. The vent mesh material has been shaped:
The fabricator, Asian Motorsports in Dallas TX, tig welded the ends of the mesh to keep everything tidy:
The shaped mesh inserts were then sent out for black powder coating and wwere installed in the hood. The final product:
Not quite so final though for me. I'm just not pleased with the mesh inserts - they don't give the car enough of an OEM feel for me. So, I've asked the fabricators to install a different mesh in the openings, the kind used on the Honda S2000:
I'm going to have them paint the material flat black to give it an OEM contrast to the hood paint and I think I'll then be done with the project. Besides the aesthetics of the hood, I'll be happy to report back to you on if the hood helps to lower engine temps. We have several good data logs of engine temps before the hood modification that we can use for comparison.
My progress: the hood vents have now been completed and the hood is painted. The vent mesh material has been shaped:
The fabricator, Asian Motorsports in Dallas TX, tig welded the ends of the mesh to keep everything tidy:
The shaped mesh inserts were then sent out for black powder coating and wwere installed in the hood. The final product:
Not quite so final though for me. I'm just not pleased with the mesh inserts - they don't give the car enough of an OEM feel for me. So, I've asked the fabricators to install a different mesh in the openings, the kind used on the Honda S2000:
I'm going to have them paint the material flat black to give it an OEM contrast to the hood paint and I think I'll then be done with the project. Besides the aesthetics of the hood, I'll be happy to report back to you on if the hood helps to lower engine temps. We have several good data logs of engine temps before the hood modification that we can use for comparison.
