13beyahbeatch

i picked up the 7 about a week ago and i love the car, everythings stock, the only thing is when i take it up pass 5 to 6 its starts makin a humming noise and it starts to shake. i was told it could be a series of things like the drive shaft or the tranny mount, now im still new to the whole rotary scene but im very eager to learn everything and anything, now i know it takes time but when your speedometer redlines around 8 something and you can only rev it up to 5 or 6 that really sucks.
please help...

also will i have any problems replacing the stock radiator with an 88 turbo one?
aside from the filler cap being in a different place and it being about 3/4 of an inch longer in lenght...

neu

that could be a lot of different things man, it could even be something as simple as bad tires, front end alignment, wheels out of balance... any of that could cause a shake at higher speeds.

Aaron Cake

iTrader: (1)

So the shake is RPM dependant? Check to see if your fan is chipped or broken.

No problem swapping rads.

13beyahbeatch

the tires and alignment are fine and yes i would say the shake is rpm dependent cuz it shakes on every gear whenever i take it up 5-6.

Aaron Cake

iTrader: (1)

The the first thing you should check for is a damaged fan, bad engine mounts, or bad transmission mounts.

13beyahbeatch

when i attempted to changed my radiator i did notice that the fan is chipped like it had been grinding on something i dont know what. i was told to replace it with a fiero fan which would be far more suitable.

Aaron Cake

iTrader: (1)

The Fiero fan isn't "more suitable", it's just cheaper and easier to find. If you are going to go the electric fan route, please read http://www.aaroncake.net/rx-7/efanmyth.htm and http://www.aaroncake.net/rx-7/efaninstall.htm