What made the S5 n/a have a higher redline?
#26
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I think it was explained in my first post.
Simply put: less wight=higher redline
This isnt a new concept. It has been talked about fairly often. When a newbie comes in and askes why his S5 na has a higher redline people tell him it is because his rotors are lighter.
Why can the rx-8 spin to 9k, it has even lighter rotors then the S5. It all has to with weight and the lack of it. The lighter you can make a rotor the easier it will be able to rev higher. However it can not make it too light(or take away to much material) because then you would start risking the structural integrity of the rotor.
Simply put: less wight=higher redline
This isnt a new concept. It has been talked about fairly often. When a newbie comes in and askes why his S5 na has a higher redline people tell him it is because his rotors are lighter.
Why can the rx-8 spin to 9k, it has even lighter rotors then the S5. It all has to with weight and the lack of it. The lighter you can make a rotor the easier it will be able to rev higher. However it can not make it too light(or take away to much material) because then you would start risking the structural integrity of the rotor.
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Originally posted by Icemark
And the S5 Turbo, used the same weight (and compression) rotors as the S4 non-turbo... so that is why it is stuck at 7K.
And the S5 Turbo, used the same weight (and compression) rotors as the S4 non-turbo... so that is why it is stuck at 7K.
http://www.mazdatrix.com/faq/rotorwgt.htm
#28
I didn't argue that I just wanted some confirmation from other people on the forum. I didn't want to assume too much on my own without support from other members. But the fact is I wasn't asking about price or how to get lightened rotors. I have the RB catalog and have read a lot of the stuff on it. I know the rotors they sell cost both left and right nuts.
Santiago
Santiago
#29
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I posted that, but I have no idea how I got under Bindeezel's user name.
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However,
It really would not have mattered becasue one would not be able to get much more power changing the redline in the S5 with the stock turbo.
#33
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Yes they are not the same. However, adding another 1000k to the redline would not matter on a stock application. The stock engine/turbos would not benefit anything from the additional rpms.
#34
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caugh, caugh, called by a new meber.
id have to say this is the first time you've been off that ive seen.
a commendable record
well you are always way more accurate than me so i geuss i cant give you too much of a hard time.
#36
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Originally posted by 1987RX7guy
One other time he was wrong was in the gph of the stock fuel pump.
One other time he was wrong was in the gph of the stock fuel pump.
i geuss thats why hes a moderator. he accutaly cares about the accuracy of his statements.
#37
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Originally posted by andrew lohaus
caugh, caugh, called by a new meber.
id have to say this is the first time you've been off that ive seen.
caugh, caugh, called by a new meber.
id have to say this is the first time you've been off that ive seen.
#38
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Well, if you increase the size of the apex seals, wouldn't that allow the engine to have a higher redline? Or would you have to increase the side seals as well?
#39
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Originally posted by domesttuner
Well, if you increase the size of the apex seals, wouldn't that allow the engine to have a higher redline? Or would you have to increase the side seals as well?
Well, if you increase the size of the apex seals, wouldn't that allow the engine to have a higher redline? Or would you have to increase the side seals as well?
Basically the "redline" of a rotary engine is determined by the rpm at which the e-shaft flexes enough to allow the rotors to make contact the the side housings. But there are other factors that must be consider as well, such as the stationary gears, bearing clearances, boost pressure (e-shaft flex), and so one.
Last edited by MrBob 86; 02-20-04 at 12:38 AM.
#40
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Yeah, I figured that out when I looked at Mazdatrix.com to prove a point to a drunk ASE mechanic that rotaries are better than his 305 chevy. The carbon seals had a statement that said the same thing you did - sealed well at high speed, sucked at idle or low rpm.
#42
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Originally posted by domesttuner
Well, if you increase the size of the apex seals, wouldn't that allow the engine to have a higher redline? Or would you have to increase the side seals as well?
Well, if you increase the size of the apex seals, wouldn't that allow the engine to have a higher redline? Or would you have to increase the side seals as well?
so the stronger and lighter the driveline is the higher the redline before it breaks.
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