231 RX-8 with can't rev pass 6.900 RPMS in 6 gear
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231 RX-8 with can't rev pass 6.900 RPMS in 6 gear
Hi, I've an RX-8 but this problem is actually of a friend of mine on the spanish club (he isn't registered here). As I've said in the subject his RX-8 (231 HP version) can't rev pass 6.900 RPMS in sixth gear. He has tried to accelerate un fifth gear and it goes until the speed of 135 MPH, then it changes to sixth gear (during the change the speed drops to about 125MPH "as if it had a parachute" in his words) and accelerate again, sloooooooooooooooooooowly, until 135, and then the car doesn't grow more speed, even in a slight slope down.
My car can get without much problems to 150MPH at 7.XXX RPMS. My friend car has it's motor replaced at 28.000 miles because of an oil and coolant leak and the clutch has to be replaced at 38.000 miles. His closest Mazda garage doesn't seem to have a clue
What do you think could be the problem? Broken cat? Fixed motor problem? ???
Thanks!
My car can get without much problems to 150MPH at 7.XXX RPMS. My friend car has it's motor replaced at 28.000 miles because of an oil and coolant leak and the clutch has to be replaced at 38.000 miles. His closest Mazda garage doesn't seem to have a clue
What do you think could be the problem? Broken cat? Fixed motor problem? ???
Thanks!
#3
Alright, i'm on earth again. Most cars are government top speed limited, what makes your friend think his RX-8 isn't? That's like.. common sense, how is this a problem anyway - why would he be going 135 in the first place..
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It isn't limited because in spain cars are not mechanichally or electronically limited. The question is not why he wants to go to over 135 but why his car can't
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6th gear is an overdrive gear- it has no power. he will not reach top speed in 6th gear as it does not have power enough to overcome wind resistance. he will reach top speed in 5th gear. at what rpm is it when it is going 135mph in 5th gear (yes people i could do the math i dont want to)
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Yes, that is what I told him but the fact is that my car and other cars here can rev up to 7.XXX in 6th and speed until 14.X-150 in 6 gear but him doesn't, so there is a clear difference.
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Anyway he keeps telling me that the max speed his car can get in fifth gear is 137 MPH (I've asked him to tell me at what RPMS, but I guess that's at about 8200RPM, while mine easily get 145 in fifth gear at about 8700 RPMS as proven by this photo of my car in fifth gear (232 = 144):
#10
Originally Posted by juanjux
Anyway he keeps telling me that the max speed his car can get in fifth gear is 137 MPH (I've asked him to tell me at what RPMS, but I guess that's at about 8200RPM, while mine easily get 145 in fifth gear at about 8700 RPMS as proven by this photo of my car in fifth gear (232 = 144):
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Originally Posted by two rotors
easy on a rolling road !
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#18
Rotary Wanker
Now I know this sounds lame, but when they replaced his engine they did put the high ouput motor in it? The top speed and rpms quoted seem pretty close to the automatic version.
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Originally Posted by juanjux
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Originally Posted by Ericok
Now I know this sounds lame, but when they replaced his engine they did put the high ouput motor in it? The top speed and rpms quoted seem pretty close to the automatic version.
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yes, but this is not the problem, as you say 6th gear has "no power", but is in 6th when you can reach top speed. I mean, in 5th gear you reach 235km/h (146mph) more or less, but you insert 6th gear and you can go perfectly to 240km/h (149mph) and then more slowly reach 255km/h (155mph), so in 5th gear you can not obtani top speed.
I think it can be intake o cat problems... or maybe ECU problem, I don't know if they changed the ECU when the engine was changed... I say this because the performance of his car is similar as it was with the first engine.... strange...
I think it can be intake o cat problems... or maybe ECU problem, I don't know if they changed the ECU when the engine was changed... I say this because the performance of his car is similar as it was with the first engine.... strange...
Originally Posted by zoom44
6th gear is an overdrive gear- it has no power. he will not reach top speed in 6th gear as it does not have power enough to overcome wind resistance. he will reach top speed in 5th gear. at what rpm is it when it is going 135mph in 5th gear (yes people i could do the math i dont want to)
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