Red Rx-7 FD
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DJ wrote:
Lets just clear the air, I have had the motor replaced once and the tranny replaced once also. The motor was replaced cuz of a faulty "side seal" it’s the seal that goes between the coolant chamber and the combustion chamber, it’s just like a head gasket. Marty (the rotary mechanic at Lunde) pushed to have the engine replaced cuz he just wanted to see a new motor in the car. Same deal with the tranny it didn’t necessarily need to be replaced but it was, cuz on the tranny the bearing on the output shaft in the tranny housing went out. That’s and ez fix, but he wanted to see the car get a new tranny, and it all was covered under warranty so why not, right? But Chuck is right you have to keep em cool or they will shit on you. If you let them overheat even once you are just askin for trouble. See that’s the problem with 3rd party information, even if she was my girlfriend she still don’t know shit about my car, just like if you don’t even own a FD. As for the turbos going out early, never herd of it.Yeah they don’t hold up as WELL they hold up better, what other motor do you know that comes from the factory with a 9k redline, not very many. The race motors sit at 15k and above for most of a race.
What redline the engine can reach doesn't reflect how well an engine is made. -
94NDTA wrote:
What redline the engine can reach doesn't reflect how well an engine is made.
If you know anything about engines you would know that in order for one to rev that high it has to be built to precision. I would like to see ur LT-1 rev to 9k at the track for a whole day with no problems, where my car can do it, to what? you say only 60k miles? I didnt come in here to get into a flame war with you Sean, i just came to clear the air. -
DJ wrote:
I would like to see ur LT-1 rev to 9k at the track for a whole day with no problems, where my car can do it, to what? you say only 60k miles?
Electric motors spin to 70,000 + rpms just fine, does that mean both our engines are weak? I'm just saying there are different factors that play into reliability. Also, it's LT1, the LT-1 is a carburated 350 fom the 60's 70's. -
94NDTA wrote:
What redline the engine can reach doesn't reflect how well an engine is made.Actually, it sort of does. It means your engine design is inherently well balanced (as a result of thought out engineering). The problem with rotaries is they don't like to sit. Unlike piston engines, they do like to be revved, instead of being babied.
2005 Mercedes-Benz C240 4Matic
1993 Mazda Rx-7 Twin Turbo (sold)
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i agree needs more motor.
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AcesHigh wrote:
Actually, it sort of does. It means your engine design is inherently well balanced (as a result of thought out engineering). The problem with rotaries is they don't like to sit. Unlike piston engines, they do like to be revved, instead of being babied.
Or that your internal parts are smaller/lighter so you don't need to fork out big bucks on as high quality materials as an engine with larger/heavier internals.How high your engine revs does not directly reflect how well built your engine is.
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94NDTA wrote:
Or that your internal parts are smaller/lighter so you don't need to fork out big bucks on as high quality materials as an engine with larger/heavier internals.How high your engine revs does not directly reflect how well built your engine is.
ok look a rotary has 80% less moving parts than a conventional 4 cylinder which might not have anything to do with this argument, but since it has less parts, it is easier to balance wich makes it balanced more evenly than your v-8.quote from my automotive engines teacher. Also like any other motor they have problems and things brake or just get worn out. It isnt just from beating on it like you seem to make it sound.....oh and tell me how often have you seen a rotor get scored? so heavier components, yes, but mor expensive, no. oh ya it only takes two people to lift a rotary.... how many people does it take to lift yours?
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AcesHigh wrote:
That must be why F1 and Indy engines all rev to 10k and beyond...And why RE-Amemia engines can rev to 13-15k..... I'm not claiming to be a rotary specialist, but it seems that people like to give them such a bad shake when it comes to reliability when they very little knowledge/appreciation of the genius masterpiece that is a rotary. If every motor company made a rotary, I guarantee that they'd be more reliable than they currently are. When only one manufacturer makes a rotary (and for only one car in their line-up at a time) there is really nothing to push the technology forward at the rate that piston motors are progressing.
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AcesHigh wrote:
That must be why F1 and Indy engines all rev to 10k and beyond...
If you are trying to argue with me, this isn't helping your arguement. There is nothing saying an engine with heavier components can't rev high, it just takes more technology and money to do so. -
94NDTA wrote:
If you are trying to argue with me, this isn't helping your arguement. There is nothing saying an engine with heavier components can't rev high, it just takes more technology and money to do so.Ok then, name an engine with heavier components that is being used in motorsports that is high revving (above 10K). Maybe there is one, but I'm not aware of it. The reason they go with light components is two fold: 1 they want to rev high and 2 they want to reach high RPM's faster.
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kswissondubs wrote:
ok look a rotary has 80% less moving parts than a conventional 4 cylinder which might not have anything to do with this argument, but since it has less parts, it is easier to balance wich makes it balanced more evenly than your v-8.quote from my automotive engines teacher. Also like any other motor they have problems and things brake or just get worn out. It isnt just from beating on it like you seem to make it sound.....oh and tell me how often have you seen a rotor get scored? so heavier components, yes, but mor expensive, no. oh ya it only takes two people to lift a rotary.... how many people does it take to lift yours?
You just agreed with me. Lighter components (or less moving components, I.E. Less mass being moved) will be able to rev higher than a larger (more moving mass) engine with parts manufactured at the same quality level.All I said, is how high your engine revs does not reflect how well built your engine is. There are are different factors other than how high it revs that determine that!
It's a simple fact. It's not that in depth.
Also, his engine was DESINGED to spin that high. If it FAILS to do so, to me that isn't as hihg of quality as I would have expected. If my car failed when it spun to 6,000 rpms, I would be dissapointed too. The technology in that car simply isn't far enough along yet to have it be as reliable as a piston engine.
Also, what does lifting it out of the car have to do with anything?
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DJ wrote:
Lets just clear the air, I have had the motor replaced once and the tranny replaced once also. The motor was replaced cuz of a faulty "side seal" it’s the seal that goes between the coolant chamber and the combustion chamber, it’s just like a head gasket. Marty (the rotary mechanic at Lunde) pushed to have the engine replaced cuz he just wanted to see a new motor in the car. Same deal with the tranny it didn’t necessarily need to be replaced but it was, cuz on the tranny the bearing on the output shaft in the tranny housing went out. That’s and ez fix, but he wanted to see the car get a new tranny, and it all was covered under warranty so why not, right?.I question your statement on why the engine and tranny were replaced....I was the one who ordered both of them for your car and I know the history of your visit at the dealership
POWERD BY
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tjamz wrote:
Ok then, name an engine with heavier components that is being used in motorsports that is high revving (above 10K). Maybe there is one, but I'm not aware of it. The reason they go with light components is two fold: 1 they want to rev high and 2 they want to reach high RPM's faster.
I when I said heavier, I meant heavier than a piston made out of the same material only smaller.Such as 4 pistons from a 2.0L I4 would be lighter than 8 pistons from a 6.0L V8, simply because it is larger, even if they were made out of the same material.
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