dus any one know ---- about RX7
02-26-2006, 03:11 PM
#63
1.5 BAR
Join Date: Nov 2004
Posts: 1,109
Re: dus any one know ---- about RX7
Originally Posted by Anubis_4_99
you two are useless 
jecu you shouldnt even own an RX-7 if you hate it so much, sell it and do the rotary community a favor and never touch one again
jecu you shouldnt even own an RX-7 if you hate it so much, sell it and do the rotary community a favor and never touch one again
If your so ------- stuck on RX7's and want me to leave the community then why dont you have one and why do you have a pic of a turbo civic in your avatar 
looks like you got tired of them to huh
02-26-2006, 05:15 PM
#65
3.0 BAR
Join Date: Aug 2004
Posts: 2,028
Re: dus any one know ---- about RX7
Originally Posted by random-strike
rx7s are garbage, wankle motors are garbage just get over it
the way you make an rx7 cool is by swapping in a different motor. wankle my yankle
the way you make an rx7 cool is by swapping in a different motor. wankle my yankle
02-26-2006, 05:46 PM
#66
1.5 BAR
Join Date: Feb 2005
Posts: 691
Re: dus any one know ---- about RX7
Originally Posted by kain
yeah, cus a 2mm piece of steel can blast through 1 inch of cast iron. your a fucken ******.
rx7's are cars that are missconcieved. sure the seals tend to break on them from time to time, but besides that, thats it. and then the seals dont break very often. example, they usually tend to bust ( in na form ) is when shitty water thats already hot hits the rar rotor housings, and boom, they bust cus rotaries dont like heat. also, carbon is the wort thing ever on a rotary. carbon will destroy an apex seal.
no back to the topic. rx7's are great cars. sure some and most are pain in the assses cus mazda used a complication means of controlling the entire engine, and if something little breaks or comes loose, then your deemed to be fucked for life. the main thing to look for in a 24 series rx7 ( 86 through 87.5 or 88 i believe ) is the pulsation dampener. get rid of this asap and go for the banjo bolt. if this breaks, it spews gasoline all over the exhaust manifold. and yes, they are 100% gonna break. lol. i replaced mine with a banjo bolt and have been good to go. also what you need to loo for, it to make sure the injector, compression, and oil and coolent are withing spec. i suggest replacing all the fluids. then i also suggest runing 2stroke oil in with the gas because the stock oil injectors dont do too good of a job injecting oil everywhere, thats where the two stroke comes in.
also, the main thing about rx7's is that, they are limited by their power simply by what the mods are. internals arent really that boig of a problem. the stock mazda seals have been known to withstand 600+ whp. if you have the money, its deffinatly woth it. if your really able to have a couple headaches, tyhen its a good fun all around nice car to buy.
rx7's are cars that are missconcieved. sure the seals tend to break on them from time to time, but besides that, thats it. and then the seals dont break very often. example, they usually tend to bust ( in na form ) is when shitty water thats already hot hits the rar rotor housings, and boom, they bust cus rotaries dont like heat. also, carbon is the wort thing ever on a rotary. carbon will destroy an apex seal.
no back to the topic. rx7's are great cars. sure some and most are pain in the assses cus mazda used a complication means of controlling the entire engine, and if something little breaks or comes loose, then your deemed to be fucked for life. the main thing to look for in a 24 series rx7 ( 86 through 87.5 or 88 i believe ) is the pulsation dampener. get rid of this asap and go for the banjo bolt. if this breaks, it spews gasoline all over the exhaust manifold. and yes, they are 100% gonna break. lol. i replaced mine with a banjo bolt and have been good to go. also what you need to loo for, it to make sure the injector, compression, and oil and coolent are withing spec. i suggest replacing all the fluids. then i also suggest runing 2stroke oil in with the gas because the stock oil injectors dont do too good of a job injecting oil everywhere, thats where the two stroke comes in.
also, the main thing about rx7's is that, they are limited by their power simply by what the mods are. internals arent really that boig of a problem. the stock mazda seals have been known to withstand 600+ whp. if you have the money, its deffinatly woth it. if your really able to have a couple headaches, tyhen its a good fun all around nice car to buy.
Here is the test of whether a car is reliable or not: give it to a middle aged woman for 5 years. Sure Mazda's concept was good and they engineered the car to be strong. That, however, only makes it a good platform for a racecar or mechanic, not a person who just wants to drive a cool looking car and go kinda fast. DSMs were overengineered and practically race ready from the factory. 4G63s are ------- bullet proof, but look at why they were discontinued, they are unreliable as ----.
Oh and for the record, 600hp youldnt take you more than 10k miles on stock seals. I've talked to guys who were rebuilding thier rotaries every quarter and they werent 400hp. To them, it was just a hobby car though, not daily drivers by any means.
02-26-2006, 08:46 PM
#68
1.0 BAR
Join Date: Aug 2003
Posts: 489
Re: dus any one know ---- about RX7
Wow, what a bunch of misconceptions about rotary engines! The fact is they are a superior design to piston engines but have not had near the research and development...particularly apex seal materials. Mazda can only do so much with their little budget.
I have two rx7's, an 85 and a 95. The 85 is being turned in to a track car and the engine has been peripheral ported. I'm keeping it carbureted and the little 12a should produce in the neighborhood of 270-290hp.
The 95 was reliable for the 39k I put on it before tearing it down for performance mods (single turbo conversion and fairly extreme porting)
The only issue I've had was a busted coupler where the y-pipe that converges the charges from both turbos connects to another charge pipe before entering the intercooler.
For those of you complaining about starting problems the problem lies in the fuel injectors. When the engines have fairly high miles and the seals become worn even a slightly leaking injector can wash the oil from the housing walls which in turn reduces compression thus preventing combustion. Replacing the injectors or even installing a fuel cut off switch can help, along with using pre-mix in the fuel.
The cats can and have killed more than one engine....mainly on the fd's. The problem is a circumferential perferation of the catalyst material in the precat which is located right off the turbos and is basically a downpipe. The catalyst material comes loose and lodges sideways blocking the exhaust flow choking the engine hopefully before causing massive heat build up and toasting it.
Keep the cooling systems in tip top shape, perform any necessary reliability mods, and if you are going to modify them do so correctly being sure to supply them with plenty of fuel when deviating from stock boost levels, adequate engine management and tuning, intercooler upgrade, etc.
They are good engines and can be made very fast and reliable when treated properly. They aren't for the faint of heart or wallet!
I have two rx7's, an 85 and a 95. The 85 is being turned in to a track car and the engine has been peripheral ported. I'm keeping it carbureted and the little 12a should produce in the neighborhood of 270-290hp.
The 95 was reliable for the 39k I put on it before tearing it down for performance mods (single turbo conversion and fairly extreme porting)
The only issue I've had was a busted coupler where the y-pipe that converges the charges from both turbos connects to another charge pipe before entering the intercooler.
For those of you complaining about starting problems the problem lies in the fuel injectors. When the engines have fairly high miles and the seals become worn even a slightly leaking injector can wash the oil from the housing walls which in turn reduces compression thus preventing combustion. Replacing the injectors or even installing a fuel cut off switch can help, along with using pre-mix in the fuel.
The cats can and have killed more than one engine....mainly on the fd's. The problem is a circumferential perferation of the catalyst material in the precat which is located right off the turbos and is basically a downpipe. The catalyst material comes loose and lodges sideways blocking the exhaust flow choking the engine hopefully before causing massive heat build up and toasting it.
Keep the cooling systems in tip top shape, perform any necessary reliability mods, and if you are going to modify them do so correctly being sure to supply them with plenty of fuel when deviating from stock boost levels, adequate engine management and tuning, intercooler upgrade, etc.
They are good engines and can be made very fast and reliable when treated properly. They aren't for the faint of heart or wallet!
02-26-2006, 09:30 PM
#69
0.0 BAR
Join Date: Dec 2002
Posts: 0
Re: dus any one know ---- about RX7
Originally Posted by Heath
Wow, what a bunch of misconceptions about rotary engines! The fact is they are a superior design to piston engines but have not had near the research and development...particularly apex seal materials. Mazda can only do so much with their little budget.
I have two rx7's, an 85 and a 95. The 85 is being turned in to a track car and the engine has been peripheral ported. I'm keeping it carbureted and the little 12a should produce in the neighborhood of 270-290hp.
The 95 was reliable for the 39k I put on it before tearing it down for performance mods (single turbo conversion and fairly extreme porting)
The only issue I've had was a busted coupler where the y-pipe that converges the charges from both turbos connects to another charge pipe before entering the intercooler.
For those of you complaining about starting problems the problem lies in the fuel injectors. When the engines have fairly high miles and the seals become worn even a slightly leaking injector can wash the oil from the housing walls which in turn reduces compression thus preventing combustion. Replacing the injectors or even installing a fuel cut off switch can help, along with using pre-mix in the fuel.
The cats can and have killed more than one engine....mainly on the fd's. The problem is a circumferential perferation of the catalyst material in the precat which is located right off the turbos and is basically a downpipe. The catalyst material comes loose and lodges sideways blocking the exhaust flow choking the engine hopefully before causing massive heat build up and toasting it.
Keep the cooling systems in tip top shape, perform any necessary reliability mods, and if you are going to modify them do so correctly being sure to supply them with plenty of fuel when deviating from stock boost levels, adequate engine management and tuning, intercooler upgrade, etc.
They are good engines and can be made very fast and reliable when treated properly. They aren't for the faint of heart or wallet!
I have two rx7's, an 85 and a 95. The 85 is being turned in to a track car and the engine has been peripheral ported. I'm keeping it carbureted and the little 12a should produce in the neighborhood of 270-290hp.
The 95 was reliable for the 39k I put on it before tearing it down for performance mods (single turbo conversion and fairly extreme porting)
The only issue I've had was a busted coupler where the y-pipe that converges the charges from both turbos connects to another charge pipe before entering the intercooler.
For those of you complaining about starting problems the problem lies in the fuel injectors. When the engines have fairly high miles and the seals become worn even a slightly leaking injector can wash the oil from the housing walls which in turn reduces compression thus preventing combustion. Replacing the injectors or even installing a fuel cut off switch can help, along with using pre-mix in the fuel.
The cats can and have killed more than one engine....mainly on the fd's. The problem is a circumferential perferation of the catalyst material in the precat which is located right off the turbos and is basically a downpipe. The catalyst material comes loose and lodges sideways blocking the exhaust flow choking the engine hopefully before causing massive heat build up and toasting it.
Keep the cooling systems in tip top shape, perform any necessary reliability mods, and if you are going to modify them do so correctly being sure to supply them with plenty of fuel when deviating from stock boost levels, adequate engine management and tuning, intercooler upgrade, etc.
They are good engines and can be made very fast and reliable when treated properly. They aren't for the faint of heart or wallet!
