this maight sound stupid but i was just wondering.

i love rx-7 and planing to get one. but i need reliable car with good engine and milage so i was thinking if i take out turbos out of FD and increase gas milage the engine will be much reliable. i know...., i know.......(stupid me) but i'm guy that goes for the look not speed. it feels good to kick @ss but some 180-200hp will kill most of the cars in my area especially if i put nos.

i'm traveling to college every day that is the reason

is it possible to take out turbos and lower economy???

thanks

 

turbos increase the efficiency of the engine, therefor giving better gas milage.

 

i heard that turbos are trsty
that may be true but turbos shorten life of the engine
therefore there are less problems with engine which means less money that is proven fact from previous gen

 

Wait a minute.
Your going to seriously think about taking off the turbos for reliability and gas mileage. But then you say you are going to put nitrous on it. You are essentilly taking off one evil to put on another...nitrous will **** up a motor also(thus there goes your reliability)..especialy if it isn't done right.

now if you were kidding then nevermind.

In your second post you said turbos are trsty...i guess you were trying to say trusty. But i am not sure. But fom the rest of that post you are right anything that is force fed (turboed, supercharged, and nitrous) is going to have a short life span..especially if used to its potential. If you get a FD you could just keep your foot out of it...then that would be like not having turbos and be easier than taking them off. I have a feeling though that if you drive it and dont take them off you will become a boost junky and wont be able to quit.

Oh and before i wrap this up i dont even know if it is possible to take the turbos off a FD...I am going to say if i had to guess..they can be.
well
later

 

OH ...................... MY ....................... GOD.

Looks like another victim of the North Carolina public school system. Where in NC are you? You need to learn a lot and maybe I can help. You would CREAM your gas mileage by taking the turbos off. Someone brought this same topic up several weeks ago and I "mouthed off" and said that turbos actually improve gas mileage from an economical standpoint (not if you're lead-footed ... not in a "performance" scenario) and most everyone thought that I was nuts until I and someone else explained it. Now it's a subscribed belief among people here. Anyways, taking the turbo off and running a turbo motor (low compression) without the additional "compression" provided by the turbo is just going to make you dump fuel. The majority of the reason that the FD is so bad on gas in city driving is powering the rotary from stops without boost. You're wanting a car that's without boost entirely.

You want an "economical" car that's just for show? Get an NA JZA80 Supra or an NA Z32.

 

Actually having Turbos is alot more economical. Just floor it for a while until you pick up momentum, then stick it in neutral and coast your way over to your next destination.

 

This works, I do it all the time in my neighborhood..

You should just by a N/A 2nd gen or go with a honda for gas mileage..

 

For best fuel ecomomy and reliability on an FD.......sell it and buy a civic! I can't believe you are asking this. Yes they are NA FD Amemiya has a NA 20B that has something like 500hp but that is a race car.

If you are that worried about the car you should sell it and let someone who will take care of it like an FD shoud be.

 

If you're so worried about reliability then why get an FD?? You need a Civic or Golf. Take the turbos out? - Have you seen the difference in gas mileage between a 300Z n/a and 300Z TT - 18/24 and 18/24 - ?????? They are the same. If you are so worried about reliability then have the turbos switched to non-sequential and it becomes much less prone to problems. You need your head checked.

 

Agreed....

I hate to rain on your parade, but if you are even THINKING about doing this in the name of fuel economy... you are shopping for the entirely wrong car.

Get a nice Civic, and enjoy your 30 mpg. When you are ready to support a FD financially, then pick one up.

Regards,
Brian

 

sorry about the pun, but I think u be smokin too much of dat refa

 

I don't see any need to bash on anyone...that is what the Supra forum is for. It may seem like a silly question to some of us...almost all of us. I'd say that we all were pretty turbo and rotary ignorant at some point.

Whether they seem "dumb" or not keep the question coming.

These guys are all bark...they do actually care about the FD and will help you when you need it.

 

I don't see any huge challenge in removing the turbos. Just get a header and re-work the intake pipes a bit (no need for an intercooler w/o a turbo, etc.). The stock engine control system should work fine with no boost.

However, one of the things you trade off is replacing an engineered OEM system with your own homebuilt or simply unique combination of aftermarket parts. It *seems* like it should all work okay, but you'll probably go through a few refinements before everything is really "right". Also, the car will be a lot louder without the turbos. The sequential turbo system is the best "active muffler" system ever -- super quiet at idle and then it roars when the second turbo comes online.

There are NA third gens racing out west. I think they may even have 12As, but they are full race cars with third gen bodies, not just converted street cars.

Someone posted that the upcoming NA RENESIS motor from the RX-8 might be hard to swap into a third gen. Your money would probably be better spent maintaining the stock system.

-Max

 

I understand that piston engines designed to be used with a turbo have lower compression ratios to accomodate the increase in fuel-air that gets shoved into the combustion chamber. I think this is to prevent detonation of the mix before the spark plug fires.

I have assumed that the fd engine is also lower in compression ratio than rotary engines that don't use turbos. Since my fd has about no power under 2000rpm, if figured this was the cause.

This is only an assumption, but if correct, the fd engine would be pretty tame/boring without the turbos. A detuned non-turbo motor, not just a non-turbo motor.

 

I don't know everything, but the way I would think is without the turbos hooked up and running on a stock ECU your car would still run rich and eat gas because the ECU is programmed to give your car enough fuel to mix with the high amount of air that the turbos push through the engine. I don't think the ECU cares whether or not you have turbos on the motor, it is programmed to think so, so it does right?? I just think with the stock ECU the car will run rich because there will be alot of unburnt fuel injected into the motor. But maybe I am wrong. And in my opinion this would still cost a little $$$ to fabricate, money that would be better spent saved for the extra gas that you will use with the turbos. And don't forget with doing this, if you ever want to get rid of the car, you will have a hard time selling it.

 

thanks guys
i wasnt gonna do that. that sounds stupid like i said i was just gonna see what other people thinks about it. it was just an idea. some people told me to buy honda well u try to compare honda with rx7 in the look and everything else. this question just pup up in my head couple days ago but it was just a question. i didnt mean to pissed u off. i just thought if i take turbos and lower economy if possible the seals might last longer. but that would cost a lot of money.
obviously no one didnt like this idea (i bet u would kill me if u could) and thanks again for the answer.

refa

 

If you did a full NA conversion, including a new standalone ecu like a Haltch or something to tune it right you could make it more fuel efficient and reliable. The only problem is you would spend so much money on it that you could buy a civic or something to daily drive to school and save you 7 for going out.

You'd be better of getting a 7, converting it to non sequential. Have it dyno tuned by someone who knows what they are doing then run low boost like 7psi.

You could go NA with the stock ecu but it wont change the economy because the ecu will still supply the same amount of fuel as it always does.

Non Sequential would be a good reliable car if its all done right and it'll prob be cheaper than going NA.

Good Luck,

 

that is what i will do

thanks for advise