just got a 91' convertible with a13b
06-09-03, 09:36 PM
#1
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just got a 91' convertible with a13b
been told this one is a pretty good engine, reliable (no turbo) and that it is the equivalent of a v8..
any further info on this engine?
g.
any further info on this engine?
g.
06-09-03, 09:41 PM
#2
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OK,
Its not equivalent to a V8, infact its hard to compare it to any piston motor, but if you do its more equivalent to a 2.6L piston motor.
Stock the motor has 160hp and around 150lb-fts of torque. Pretty reliable if the oil is changed every 2000 miles and it is well taken care of. Remember it only has 3 moving parts, so theres not a whole lot of stuff that can break.
Intake and exhaust will bring the motor to life, so if you are looking for power do those mods first.
Its not equivalent to a V8, infact its hard to compare it to any piston motor, but if you do its more equivalent to a 2.6L piston motor.
Stock the motor has 160hp and around 150lb-fts of torque. Pretty reliable if the oil is changed every 2000 miles and it is well taken care of. Remember it only has 3 moving parts, so theres not a whole lot of stuff that can break.
Intake and exhaust will bring the motor to life, so if you are looking for power do those mods first.
06-09-03, 09:53 PM
#3
Well, you will soon find out that the car has quite a bit of power after 5500 rpm's. There is not much that will pull away from you once you use your higher rpm's. I have owned 8 different sportscars and the RX-7 is my bang for the buck favorite due to the overall ride comfort and passing gear. I would not compare it to a V8, but after 40 mph, I am not intimidated by V8s! After a downshift into your higher rpm's, you will run with some of the best!!!
06-09-03, 09:59 PM
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Well, you will soon find out that the car has quite a bit of power after 5500 rpm's. There is not much that will pull away from you once you use your higher rpm's. I have owned 8 different sportscars and the RX-7 is my bang for the buck favorite due to the overall ride comfort and passing gear. I would not compare it to a V8, but after 40 mph, I am not intimidated by V8s! After a downshift into your higher rpm's, you will run with some of the best!!!
06-09-03, 10:05 PM
#5
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I don't care for the speed really, I'm more into the reliability side of it..
how is the gas comsumption compared to a regualr engine?
ps..
its is an automatic, not stick...
I travel to vegas from L.A. about once a month to cover boxing fights....
anyone cares for boxing? check out..
www.boxingladiators.com
I know the power is not the same as a v8, but if not, wouldthe power equal more that of a v6?
how is the gas comsumption compared to a regualr engine?
ps..
its is an automatic, not stick...
I travel to vegas from L.A. about once a month to cover boxing fights....
anyone cares for boxing? check out..
www.boxingladiators.com
I know the power is not the same as a v8, but if not, wouldthe power equal more that of a v6?
06-09-03, 10:08 PM
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also...
some guy told me this is one of the most desirable engines..
he said something of this rx7 having a tri-rotary as opposed to a regular rotary..
what is he talking about, if anything?
he said something of this rx7 having a tri-rotary as opposed to a regular rotary..
what is he talking about, if anything?
06-09-03, 10:10 PM
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Gas mileage for a stock n/a is probably around 20-22mpg with an auto. There are many types of V6s with varying displacements and compression ratios, so you cant compare it to something that general. But like I said it has 160hp. And since its an auto its going to be quite slow from a stop.
BTW- I love the boxing plug!!!!
BTW- I love the boxing plug!!!!
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06-09-03, 10:17 PM
#8
Resident Moonwalker
It'll probably do 120ish on the highway without much trouble. Really you shouldn't have gotten the auto, especially if you're going for reliability. They're difficult to work on and very expensive to get fixed.
06-09-03, 10:26 PM
#10
You only have a regular rotary. The tri-rotary is a 20B, and you should only have a 13B, but it still has lots of higher rpm power. However, I did not realize it had an AT, and I am out of my league talking about AT's since I only buy sticks, but generally after 5500 rpm's the car's secondary injectors give the car a second wind that "keeps up" with EVERYTHING I have raced so far...
06-09-03, 10:32 PM
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so that is what that pick up (drops the rpm a bit once I hit around 60 and then picks up again right away on the rpm?
I thought the engine was doing funny things...
hope this is normal, sounds as if it by what you just said...
I thought the engine was doing funny things...
hope this is normal, sounds as if it by what you just said...
06-09-03, 10:37 PM
#12
Resident Moonwalker
Well, as far as removal/installation of the whole transmission goes, it's almost the same as the manual, which is easy. But as far as getting parts for it, and getting those parts installed, it's expensive. One mechanic I talked to said he wouldn't take an RX-7 with an auto for transmission repairs, because he hated how complicated it was.
06-09-03, 10:44 PM
#14
Former Moderator. RIP Icemark.
Originally posted by BDoty311
Pretty reliable if the oil is changed every 2000 miles and it is well taken care of.
Pretty reliable if the oil is changed every 2000 miles and it is well taken care of.
On a N/A you can go easy 5K miles between oil changes unless you are useing crappy oil or you flood it. Any oil changes more than that on a N/A and you are wasteing money.
06-09-03, 11:04 PM
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The convertible with an automatic transmission is the slowest RX-7 made, but as you have probably noticed, it's pretty fast for being a "slow" RX-7, lol. Contrary to what many of the turbo boost-happy teenagers on this forum may think, there is more to a car than speed. Many automotive experts consider the convertible RX-7 one of the best convertible sportscars of all time, so you definitely have a fantastic car. It's too bad you didn't log on the forum earlier, or we would have told you to avoid the automatic transmission. Oh well, everything else is good.
The 13B is an excellent engine. I'm not sure about that "tri-rotary" stuff, but all of the Mazda rotary engines have rotors that look somewhat like triangles, so maybe that's it. There is also a "rotary radial" aircraft engine, which is a particular configuration of a piston engine, so that could also be the distinction. More about the Mazda rotary engine on these sites:
http://travel.howstuffworks.com/rotary-engine.htm
http://www.rotaryengineillustrated.com/RE101.html
The 13B is very reliable, but let's face it, these cars are old now, and things are going to break. It could be a money pit, but once you repair something, it will last for about 100,000 miles before it breaks again. A free online service manual is available on these two sites. Even if you don't work on your car yourself, you should at least look at the maintenance schedule in section A, paying special attention to the oil changes which are vital to the hot-running rotary engine.
http://www.iluvmyrx7.com/
http://fc3s.org/
Good information and lots of OEM parts priced slightly below the dealership here:
http://www.mazdatrix.com/
I don't have info on the convertible, but the EPA rated gas mileage of a new 91 non-turbo coupe with an automatic transmisison was 17 city / 23 highway. Obviously, gas mileage isn't one of the rotary engine's strong points.
The 60mph rpm drop sounds like a transmission issue, but then again I'm not a mechanic.
The 13B is an excellent engine. I'm not sure about that "tri-rotary" stuff, but all of the Mazda rotary engines have rotors that look somewhat like triangles, so maybe that's it. There is also a "rotary radial" aircraft engine, which is a particular configuration of a piston engine, so that could also be the distinction. More about the Mazda rotary engine on these sites:
http://travel.howstuffworks.com/rotary-engine.htm
http://www.rotaryengineillustrated.com/RE101.html
The 13B is very reliable, but let's face it, these cars are old now, and things are going to break. It could be a money pit, but once you repair something, it will last for about 100,000 miles before it breaks again. A free online service manual is available on these two sites. Even if you don't work on your car yourself, you should at least look at the maintenance schedule in section A, paying special attention to the oil changes which are vital to the hot-running rotary engine.
http://www.iluvmyrx7.com/
http://fc3s.org/
Good information and lots of OEM parts priced slightly below the dealership here:
http://www.mazdatrix.com/
I don't have info on the convertible, but the EPA rated gas mileage of a new 91 non-turbo coupe with an automatic transmisison was 17 city / 23 highway. Obviously, gas mileage isn't one of the rotary engine's strong points.
The 60mph rpm drop sounds like a transmission issue, but then again I'm not a mechanic.
06-09-03, 11:18 PM
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The vert is a nice car.. but with an auto, it isn't as fast as a sports car of any denomination should be.
It's heavy.... and what was that about an auto?
J/K It's still a very nice car- great for the highway and county cruising with the top down.
Just don't try to take any Mustang's from a stoplight!
It's heavy.... and what was that about an auto?
J/K It's still a very nice car- great for the highway and county cruising with the top down.
Just don't try to take any Mustang's from a stoplight!
06-09-03, 11:20 PM
#18
Former Moderator. RIP Icemark.
and still one of the best convertibles ever made for any amount of money
and as far as power even the auto 'verts were faster than the first gen Miatas and many of the stock accords and civics.
and as far as power even the auto 'verts were faster than the first gen Miatas and many of the stock accords and civics.
Last edited by Icemark; 06-09-03 at 11:25 PM.
06-09-03, 11:29 PM
#19
Resident Moonwalker
Maybe not a money pit, but definitaly something to be taken care of. If you had talked to us before you got it, you probably wouldn't have gotten an RX-7 at all, auto or manual. I'm sure you'll be happy with it, that is until you see how much it costs to fix the transmission. Be happy. Enjoy your purchase. I think you made a wise decision with it, tho I would have stayed away from the auto.
Be happy. Enjoy your purchase. I think you made a wise decision with it, tho I would have stayed away from the auto.
06-09-03, 11:29 PM
#20
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I don't care for speed, I don't need another speeding ticket, I'm just pissed off now that when this car breaks down, I'm gonna have to shell out a truckload of money just to fix it..same money I could easily spend on a regular enigne car..
damn!!
I knew I should have bouth that 93' eclipse for the same money I spent on this one....
damn!!
I knew I should have bouth that 93' eclipse for the same money I spent on this one....
06-09-03, 11:34 PM
#21
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No comparison between the eclispse and the 7 in terms of fit and finish between the two.
I think the vert 7 is a very high quality car- far ahead of it's time, it has its quirks, but overall is a car that will reward it's driver in divedends.
I think the vert 7 is a very high quality car- far ahead of it's time, it has its quirks, but overall is a car that will reward it's driver in divedends.
06-09-03, 11:46 PM
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well, I did post a thread a week before buying the car in here..
I asked what I was getting myself into..
I only received one response telling me it was a nice car..
although gratefulo someone bothered to answer back, it was of no parctical help at all....
I asked what I was getting myself into..
I only received one response telling me it was a nice car..
although gratefulo someone bothered to answer back, it was of no parctical help at all....
06-09-03, 11:57 PM
#24
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There's always tons of posts like that one here... some people probably just get tired of answering them after a while unfortunately!
Enjoy your car- and this forum is an absolutely UNBEATABLE resource for solving any problems I've had with the car- it's just amazing. Saved me thousands, and allowed me to learn sooo much. Just ignore the kids who get their panties in a bunch arguing about rice and TII vs N/A LOL
A lot of the problems with 7's aren't unique to that car, and odds are that a million people have encountered them before.. so just ask away anytime you have a question!
Enjoy your vert, and definately consider selling it too me dirt cheap so I can put my turbo conversion in it...
Enjoy your car- and this forum is an absolutely UNBEATABLE resource for solving any problems I've had with the car- it's just amazing. Saved me thousands, and allowed me to learn sooo much. Just ignore the kids who get their panties in a bunch arguing about rice and TII vs N/A
LOLA lot of the problems with 7's aren't unique to that car, and odds are that a million people have encountered them before.. so just ask away anytime you have a question!
Enjoy your vert, and definately consider selling it too me dirt cheap so I can put my turbo conversion in it...