The buzzer is for several things: low coolant (or air stuck on the radiator sensor most likely), low oil pressure, low oil, rev limiter. Air bubbles on the level sensor in the radiator are common and just need bled out with the engine running, radiator cap off and heater maxed out. Rx7club has more info on the buzzer in the FAQ and the FSM. Wiring diagram has everything that uses the buzzer too. Also, Euro-spec FCs had a distributor, as did the prototype USA cars too.
I had THAT rx-7 in white as my first car! not many had the little black rubber wing, loved the torque but it was a rev high;gear low monster and at 80mph she was howling! Mpg sucked and changing the sparkplugs was like preforming surgery. oil top off every weekend. burnt 1/8 off the dippstick between fridays The wiper switch was the greatest ever designed,sold my mazda and bought a '83 944, liked the porsche better but I've heard the turbo on the rx-7 made it the beast it should have been.
The buzzer might be annoying but it's useful. In my FD RX-7 it would be far too easy to over-rev it without the buzzer. The rotary is such a smooth and quiet (stock exhaust) powerplant that you don't realise how high you are revving it. I think it's an endearing feature ;).
@monono954 Yes you can. There is a certain amount of area that is being used for combustion. While they are not the exact same, dimensions are available which is what is used.
@Travelerme1 Measure it with imperial gallons instead of US gallons? It's like another 0.8L per gallon then which means more miles since it's more fuel.
I think the main problem with the RX-7 is that people (as truenofan said) don't take care of them, but that is probably because they think it's just another Japanese car like a Honda (no one takes THAT much care of a Honda) but a Porsche... people respect these cars, because for 1- they're German made (so they're built very well) and 2- they cost more and are worth more down the road. I own an 87' 924S and a 85' 944 and both are running very well :) *excuse me for being somewhat bias. :D 7osh
@TheFastFlo - I chose the 924S and sold it a couple years later because I got tired of getting revved at by every thunderbrick in a souped-up Civic. And I got tired of knowing that if I took them up on their offer, half the time I'd lose. Thing handled like nobody's business though.
That probably means your low-coolant and low-oil pressure buzzer is disabled too (they are one and the same) so you should get that hooked back up asap
@monono954 Compared to a 4 stroke yes a 2 stroke would have more combustion events per crank rotation. The only way to compare apples to oranges is find the common denominator. I never said it was exact, but it puts it into perspective that a rotary is also not a 1.3 liter as the 1.3 liter rating only takes into account one face of the rotor as if it were a 4 stroke engine, which it is not.
0:46 when they said "genuine 130 mile an hour sports cars" i LOLed i got a ticket for doing 135 in my 2000 toyota camry le.. my used to be my grandma's car lol, not tuned. I-5 Seattle to Vancouver, WA
Funny thing the RX-7 is the one that has held its value, and its listed as 2354cc to give a comparable displacement if it were a conventional piston engine.
1:41 check out the dizzy got a bit better spark and all the goodies that come w/ it .more mpg and hp from the coil packs that came equipped on this body style rx7
mine is a turbo at 150k and still runs needs its first rebuild, just keep up on maintenance and should be good and basic rebuild is $500 then master rebuild is $1400
Well, I hear different things from different people, but most of the rotards I talk to say a rotary gets about double the HP to displacement ratio of the same grade of boinger. Hence why a 1.3L in the RX-8's is putting out 250bhp bone stock.
Mazda released an early model of the FC in japan in 85. Im pretty sure that is what he is driving. i had an 86 FC, first official year of the FC, and it had two coil packs. if you also notice the steering wheel is very spartan not really something you would see on a mass production car.
Beutiful...i love the rotary engine...i want one but i want the 1991 gt-x in black or red =D and...when i hace the money and time..mount an 20b twin turbo engine =D
Like them both but rotary is my passion and well i love the rx7 better btw yea i agree that guy was short shifting and needs two people one who knows rx7s and one who knows the porshe then we would see who really wins!!:D
ive driven my 84 944 n/a, and my friends 88 fc rx7 gxl...i prefer the 944, stiffer suspension, roomier inside/laid out better, and more get up and go...just compareing those two.
I test drove a Porsche 944 before I bought my FC. The RX-7 drives much better, imo. Granted my RX-7 has been babied its entire life and is in fantastic shape.
@gtiiiiiiii what your comparing is every combustion on a 4 stroke to every combustion on a rotary engine. there are three explosions per rotation. on a 4 stroke there is only 1 explosion every 4 strokes, so what your saying is that a 2 stroke engine rated at 49cc's is actually displacing 196 cc's compared to a 4 stroke. they can't be compared at least not without speculation.
The displacement of a rotary is misleading, the car would probably be rated as a 2.6L in competition, as it's a completely different type of engine. More to the question is why they didn't test a T2 FB.
Mazda WAS the first company to mass produce the wankle rotary piston less engine in a car. Google it or wiki it, its true. if you look at the mazda rx7, it does resemble it, but its still a different look and its lower in general and CG. and if they went with the turbo version of the porsche, they should go with the turbo version of the rx7 as well.
more efficient fuel wise, doesn't blow rotor tips when abused, cheaper to maintain, easier to find parts and theres no need to take it to a specialist to fix it. though piston engines are heavier and have a worse power to weight ratio... rotary ftw
actually it doesnt really diplace 2354cc but 2.6liter. I mean it is a 1.3liter but from a 4 cycle view its 2.6liter, but if you just want to measure the sweep area its really about 3900cc, each rotor face is 650cc. The most correct way of measuring its displacement is comparing it to a 4 cycle which measures 2.6liter. Im not going to get into why mazda calls it a 1.3 since that is such a long explanation.
The 924 rolls quite a bit doesn't it? The RX7 is surprisingly balanced on the corners. The engine is the older model, only revs to 7k? The NA engine supposed to rev to 8k vs the turbo II 7k wasn't it?
when people dont check the oil, check fluids, and only think its just like any other car the engine doesnt last as long. thats why you dont see any rx-7's really anymore.
@gtiiiiiiii what Is being measured is how much air is displaced in one explosion rather than in a compete rotation. Now, if you were to measure how much it were per rotation then it would be in fact 1800cc's per rotor but that is isn't that case, at one given period the engine will only displace 600cc's not more. displacing more air in less time, but in subtotal it is not equivalent to 1800. now if the rotor faces were combined in one then yes it would be 1800cc's but at once it is 1300cc's
RX-7 for me, no doubt about it. The Porsche IS a good car, but when you look at the history of Porsche and the history of Mazda then, now, and everytime in between you know that the Mazda is something special and the 924 has been long replaced with the Boxster, but, nothing about that generation of Porsche was particularly special or clever. The RX line always had to be special and clever. The FMR layout, the wankel rotary(bonus for turbo), the suspension, etc. RX-7 all the way.
@dvtc8u actually it is more comparable to 2354 cc's since it has 3 faces on the rotor that are being used at once. the 1.3 liter statement is very misleading and not accurate.
They mest up. In the begining they said it was equal to a 2.3L pistion engine. So some how that must of made it's way to the text on the screen at the end and the guy just read the text to do the voice over.
That might be the right CC measurement, but the Porsche is 2.5L compared to the 1.3L Mazda-- the CC measurements listed were near equal which is wrong, Porsche is near double the Mazda.
you dont shift at the warning buzzer thats the cheer leader lol for best shifting into the power band bring it up to 8000 atleast for a s5 with the light weight rotors and the 30hp boost if you shift at 8000 itll bring you to 6000 and it'll keep you in the optimal power band and yes it stops making power at 7500 but the extra 500 is worth it when shifting and staying in the optimal power band ( the more you know )
Rory Fraser you shift at redline in pretty much any car unless it drops power like a brick because the torque multiplier you lose when you shift is greater than the drop in power from a slight downturn on the power curve. Don’t believe me, see it explained on on of Engineering Explained videos that explain it in far greater detail than a comment can give without becoming a giant wall of text.
The buzzer is for several things: low coolant (or air stuck on the radiator sensor most likely), low oil pressure, low oil, rev limiter. Air bubbles on the level sensor in the radiator are common and just need bled out with the engine running, radiator cap off and heater maxed out. Rx7club has more info on the buzzer in the FAQ and the FSM. Wiring diagram has everything that uses the buzzer too. Also, Euro-spec FCs had a distributor, as did the prototype USA cars too.
everytime my friends are in the car i make the buzzer go off and i say, "Thank you very much."
Hahahaa gotta love the shoulder-zippers on that dude's jacket at 2:40 hahaha.... the '80s were awesome.
I had THAT rx-7 in white as my first car! not many had the little black rubber wing, loved the torque but it was a rev high;gear low monster and at 80mph she was howling! Mpg sucked and changing the sparkplugs was like preforming surgery. oil top off every weekend. burnt 1/8 off the dippstick between fridays The wiper switch was the greatest ever designed,sold my mazda and bought a '83 944, liked the porsche better but I've heard the turbo on the rx-7 made it the beast it should have been.
The RX-7 is such a blast to drive.
Thanks for sharing the video by the way, great stuff.
The buzzer might be annoying but it's useful. In my FD RX-7 it would be far too easy to over-rev it without the buzzer. The rotary is such a smooth and quiet (stock exhaust) powerplant that you don't realise how high you are revving it.
I think it's an endearing feature ;).
Both cars are equally great. It all comes down to price and maintenance in the end.
loooove RX-7 FCs! Wish I could buy a clean TII... I'd drive that thing 'till the wheels fell off...
awesome dude...
clearly about to go pop
@monono954 Yes you can. There is a certain amount of area that is being used for combustion. While they are not the exact same, dimensions are available which is what is used.
the porsche has some mad body roll
2:09 I love popup headlights.
@Travelerme1 Measure it with imperial gallons instead of US gallons? It's like another 0.8L per gallon then which means more miles since it's more fuel.
I think the main problem with the RX-7 is that people (as truenofan said) don't take care of them, but that is probably because they think it's just another Japanese car like a Honda (no one takes THAT much care of a Honda) but a Porsche... people respect these cars, because for 1- they're German made (so they're built very well) and 2- they cost more and are worth more down the road. I own an 87' 924S and a 85' 944 and both are running very well :) *excuse me for being somewhat bias. :D
7osh
@TheFastFlo - I chose the 924S and sold it a couple years later because I got tired of getting revved at by every thunderbrick in a souped-up Civic. And I got tired of knowing that if I took them up on their offer, half the time I'd lose. Thing handled like nobody's business though.
That's because they're driving them on a skidpad with /stock/ suspension. That's why it's a /stock/ comparison of the two cars.
3:27 we have 4 wheel steering?
is that guy in the white trousers hammond?
I never even compared the way these cars look until now.. :O
That probably means your low-coolant and low-oil pressure buzzer is disabled too (they are one and the same) so you should get that hooked back up asap
Amen to that
@monono954
Compared to a 4 stroke yes a 2 stroke would have more combustion events per crank rotation. The only way to compare apples to oranges is find the common denominator. I never said it was exact, but it puts it into perspective that a rotary is also not a 1.3 liter as the 1.3 liter rating only takes into account one face of the rotor as if it were a 4 stroke engine, which it is not.
@Markitos203 my coolant buzzer constantly goes off... I'm about to do that myself
0:46 when they said "genuine 130 mile an hour sports cars" i LOLed i got a ticket for doing 135 in my 2000 toyota camry le.. my used to be my grandma's car lol, not tuned. I-5 Seattle to Vancouver, WA
wait...the hatch on the FC is supposed to open by itself?
Funny thing the RX-7 is the one that has held its value, and its listed as 2354cc to give a comparable displacement if it were a conventional piston engine.
god that buzzer in the mazda would drive me mad after a day, I would forever be shifitng early to avoid it.
whats the latest? FC or FD?
topgear has been on for like 30 years, i just took a long break, then clarkson, tiff and quitin took over
They should also then use the 944 Turbo, the 944S2, the 944S or even the lowly, in comparison, 931. :)
1:41 check out the dizzy got a bit better spark and all the goodies that come w/ it .more mpg and hp from the coil packs that came equipped on this body style rx7
mine is a turbo at 150k and still runs needs its first rebuild, just keep up on maintenance and should be good and basic rebuild is $500 then master rebuild is $1400
thank you very much LOL!!!!!!!!!
Well, I hear different things from different people, but most of the rotards I talk to say a rotary gets about double the HP to displacement ratio of the same grade of boinger. Hence why a 1.3L in the RX-8's is putting out 250bhp bone stock.
@sof1map actually, mazda did just the opposite and took the design and pop up headlights from the porsche 924 10 years previous :)
I shift usually at 6k nowadays in mine, and no there's no limiter in it. :D
Mazda released an early model of the FC in japan in 85. Im pretty sure that is what he is driving. i had an 86 FC, first official year of the FC, and it had two coil packs. if you also notice the steering wheel is very spartan not really something you would see on a mass production car.
Beutiful...i love the rotary engine...i want one but i want the 1991 gt-x in black or red =D and...when i hace the money and time..mount an 20b twin turbo engine =D
@HachiZenki the N/a was the only one at the time there is a 1st gen distributor in this video!
Like them both but rotary is my passion and well i love the rx7 better btw yea i agree that guy was short shifting and needs two people one who knows rx7s and one who knows the porshe then we would see who really wins!!:D
13b supposed to be 1.3l but how come in this video it says 2.3l?
As he stands there saying uncanny resemblance, they look nothing alike and the rx7 has smoother lines.
Ooooooo! LEGLESS DWARVES @ 2:17!
ive driven my 84 944 n/a, and my friends 88 fc rx7 gxl...i prefer the 944, stiffer suspension, roomier inside/laid out better, and more get up and go...just compareing those two.
I test drove a Porsche 944 before I bought my FC. The RX-7 drives much better, imo. Granted my RX-7 has been babied its entire life and is in fantastic shape.
hahaha 2:49 "thank you very much."
I would love to know how they got 35MPG out of the Porsche!
I get it.
The Mazda RX7 Toyo Kogyo rotary engine is 1.3 litre !!! [Aussie in BC]
@gtiiiiiiii what your comparing is every combustion on a 4 stroke to every combustion on a rotary engine. there are three explosions per rotation. on a 4 stroke there is only 1 explosion every 4 strokes, so what your saying is that a 2 stroke engine rated at 49cc's is actually displacing 196 cc's compared to a 4 stroke. they can't be compared at least not without speculation.
"...which despite it's compact size is equivalent to a 2.3L piston engine."
Amen. i own one myself :)
Randy this show isnt in the us the tii wasnt offered in 86, but all japanese cars were turbo
The rx7's buzzer doest come on untill 7k rpm on s4 (86-88), and the rev limiter (cuts fuel) at 7800rpm.
russel bay is badass
Fucking buzzer!! I stabbed the little buzzer speaker under the dash with a screw driver until it stopped buzzing! Great move tho
The displacement of a rotary is misleading, the car would probably be rated as a 2.6L in competition, as it's a completely different type of engine.
More to the question is why they didn't test a T2 FB.
Indeed..
I got a 91' convertible rx7 and the guy who had it befor me unhooked the buzzer! I was so pissed lol
Rx-7 definitly... its looks, its seems fun to drift, and no one hardly drives FC's
Mazda WAS the first company to mass produce the wankle rotary piston less engine in a car. Google it or wiki it, its true. if you look at the mazda rx7, it does resemble it, but its still a different look and its lower in general and CG. and if they went with the turbo version of the porsche, they should go with the turbo version of the rx7 as well.
indeed
its 1.308 cc dammit..its not a piston engine
more efficient fuel wise, doesn't blow rotor tips when abused, cheaper to maintain, easier to find parts and theres no need to take it to a specialist to fix it.
though piston engines are heavier and have a worse power to weight ratio... rotary ftw
why would they use the T2 for? plus, the T2 wasn't offered in 86.
i bought my bro a 1986 MAZDA RX-7 GXL FC3S
Mm love my fc.
actually it doesnt really diplace 2354cc but 2.6liter. I mean it is a 1.3liter but from a 4 cycle view its 2.6liter, but if you just want to measure the sweep area its really about 3900cc, each rotor face is 650cc. The most correct way of measuring its displacement is comparing it to a 4 cycle which measures 2.6liter.
Im not going to get into why mazda calls it a 1.3 since that is such a long explanation.
is he saying mazdra?
The 924 rolls quite a bit doesn't it? The RX7 is surprisingly balanced on the corners. The engine is the older model, only revs to 7k? The NA engine supposed to rev to 8k vs the turbo II 7k wasn't it?
don't know what country you all are from? I see them all the time. You live in the States or Europe then im guessing?
when people dont check the oil, check fluids, and only think its just like any other car the engine doesnt last as long. thats why you dont see any rx-7's really anymore.
What car didnt look like that in the 80s supras trans ams etc
@gtiiiiiiii what Is being measured is how much air is displaced in one explosion rather than in a compete rotation. Now, if you were to measure how much it were per rotation then it would be in fact 1800cc's per rotor but that is isn't that case, at one given period the engine will only displace 600cc's not more. displacing more air in less time, but in subtotal it is not equivalent to 1800. now if the rotor faces were combined in one then yes it would be 1800cc's but at once it is 1300cc's
RX-7 for me, no doubt about it. The Porsche IS a good car, but when you look at the history of Porsche and the history of Mazda then, now, and everytime in between you know that the Mazda is something special and the 924 has been long replaced with the Boxster, but, nothing about that generation of Porsche was particularly special or clever. The RX line always had to be special and clever. The FMR layout, the wankel rotary(bonus for turbo), the suspension, etc. RX-7 all the way.
the rx7 engine size wise was 1308cc but it displaced 2354cc
@dvtc8u actually it is more comparable to 2354 cc's since it has 3 faces on the rotor that are being used at once. the 1.3 liter statement is very misleading and not accurate.
Which are back seats that suit legless dwarfs lol
Wish they compared the turbo model to the porsche lol
Britain and emission/fuel economy after the oil embargo, thats why.
well surely the correct way to measure it is to compare it to a 2 stoke engine, seeing as it pretty much is a 2 stroke engine
I noticed they said 2.3liters but thats for the 12b this rx7 has the 13b.
They mest up. In the begining they said it was equal to a 2.3L pistion engine. So some how that must of made it's way to the text on the screen at the end and the guy just read the text to do the voice over.
lol @ the facts at the end. the mazda does not have 2354cc! it has a 1.3L engine.
@dvtc8u that's only one face out of 3, so it's not as simple as that.
That might be the right CC measurement, but the Porsche is 2.5L compared to the 1.3L Mazda-- the CC measurements listed were near equal which is wrong, Porsche is near double the Mazda.
Haha i have an rx7 but tht warning buzzer is gone, i just drove around at 8k in girst gear until it magically dissapeared ;)
It's funny how there are plenty of Porsche 924 944 and 924S's around but you never see an old rx-7. Does this mean they all fell apart?
@Jonathanowns oh i know. when he said the hp i was thinking to myself...ya well check the 89 turbo ii model then start talking
Dude he definitely grinded 3rd gear lolol
i have a 86 rx7 the bitch is fun to drive
um... why did they say the rotary is 2354cc when its obviously 1308cc...
I just bought an 86 FC, looks exactly like the one in the vid. same color, same wheels, same spoiler... except it doesnt run :(
no clue... He just gives a comparison what the equivalent as normal engine size would be like
2354cc????? it's a 1.3 litres oooh my god !!!!
i choose the 924
you dont shift at the warning buzzer thats the cheer leader lol for best shifting into the power band bring it up to 8000 atleast for a s5 with the light weight rotors and the 30hp boost if you shift at 8000 itll bring you to 6000 and it'll keep you in the optimal power band and yes it stops making power at 7500 but the extra 500 is worth it when shifting and staying in the optimal power band ( the more you know )
Rory Fraser you shift at redline in pretty much any car unless it drops power like a brick because the torque multiplier you lose when you shift is greater than the drop in power from a slight downturn on the power curve.
Don’t believe me, see it explained on on of Engineering Explained videos that explain it in far greater detail than a comment can give without becoming a giant wall of text.
He said its equivalent to a 2.3 liter
5:47 the mazda has a 1,308cc engine not a 2,354cc engine its called a 13b
It has 2 power strokes, wich make it a 2.6