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Old 10-09-2002, 08:08 PM   #1
MattSEG
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Default FC RX-7 questions

I don't know where to ask...so I'll throw it at you guys.

FC GXL 78,000 miles RX-7 auto (blech) non-turbo (blech) a little bit of body work needed (blech) but I can walk away with it for under 1k.

The WRX is making me broke.... and in NM land of little snow or rain, it's not the biggest deal to have awd. (I love the subie, don't get me wrong)

But I was wondering if anyone knew/ knows where I'd look for info (cost) on converting it to stick, and perhaps a built turbo 2 rotor (rebuild current) or jdm 3 rotor cosmo engine.

Any answers for me?


{gonna paint it yellow and put a big REDSUNS on the rear fender.......not really, I'm kidding}
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Old 10-09-2002, 08:26 PM   #2
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dont do it. nice cars, but the motor needs to be rebuilt or replaced every 30k or so, but the motors cost little to nothing i think my friend got his turbo 2 jdm motor for less than a grand. but the electrical for the turbo2 motors are hard to hook up, and labor is expensive around the bay area, but if you can get a good deal on a motor swap it may be worth it. oh yeah if your gonna replace the tranny might as well replace the motor too, saves a bunch of time later.
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Old 10-09-2002, 08:42 PM   #3
dorifto88
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what you just explained is my next project car (after project impact blue
An rx7 with a tri rotor is KILLER
in one of my issues of super street, one was built, and i was in awe of the dayam thing. Looked soo nice and clean.
And everyone talks about the rotart being a week engine. Yes, it can be, but you have to take care of it, to make it last longer. I am no rotary buff, but one of my cousins ownes a rotary shop, and he says a lot of people "abuse" their cars, which is why their engine life isnt too lengthy.

Michael (not a rotary buff by any means, but wants a project S13 and RX7 when he grows up)
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Old 10-09-2002, 08:48 PM   #4
MattSEG
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Ok, so $750 for car + 350 for tranny (saw this posted price) + 900 for engine + 700 roughly for exhaust and electric (sound right?) + another 600 for body work (have friends with shops) + Boost controller (allready own) + 200 other junk for tranny conversion (junkyard).....that's what...$3500....sounds like an ok deal...


...My pops has a welder and cutting torch, I have people that would wrench on it with me for the price of a half a dozen pizzas per engine swap.
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Old 10-09-2002, 08:51 PM   #5
dorifto88
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Quote:
Originally posted by MattSEG
Ok, so $750 for car + 350 for tranny (saw this posted price) + 900 for engine + 700 roughly for exhaust and electric (sound right?) + another 600 for body work (have friends with shops) + Boost controller (allready own) + 200 other junk for tranny conversion (junkyard).....that's what...$3500....sounds like an ok deal...


...My pops has a welder and cutting torch, I have people that would wrench on it with me for the price of a half a dozen pizzas per engine swap.

one problem, er, for me anyway, CARB

nuff said.
Good luck though, and paint it cherry blossom red!!
Oh, and can you take pics of her?? Even when they are all messed up, they look beautiful to me. yeah, im wierd.
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Old 10-09-2002, 09:00 PM   #6
MattSEG
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CARB....HA...I'm in New Mexico...as long as the car is allready here that is easy, i just gotta register it in belen (town about 15 miles south) they have no emissions testing at all......Fugeddaboutit.

means I'd have to drive truck for like 2 months .....oh wait, subies been broken for one month, wouldn't be a big deal.


.....I was supposed to get the wrx back today, but they want to keep it till tomorrow morning...they have had it 4 weeks
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Old 10-09-2002, 09:17 PM   #7
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all I read was someone ignorantly saying rotaries need rebuilding after 60k or whatever. He's wrong.

Non-turbo Rotaries can last a LONG time without rebuild. The engine is probably good. I had one of those cars myself, freakin loved it.

Anyway, speak with ColinL if you can, he told me someone he knows just bought a 3-rotor w/ tranny from Japan for only $2k. Yes, I will be doing the same, just not putting it in an RX-7

And just so you know, the FC engine bay was built specifically to fit a 3 rotor

but if it's in decent shape, and is under a grand, you can't pass that up.
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Old 10-09-2002, 09:19 PM   #8
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Quote:
Originally posted by dorifto88
what you just explained is my next project car (after project impact blue
An rx7 with a tri rotor is KILLER
in one of my issues of super street, one was built, and i was in awe of the dayam thing. Looked soo nice and clean.
And everyone talks about the rotart being a week engine. Yes, it can be, but you have to take care of it, to make it last longer. I am no rotary buff, but one of my cousins ownes a rotary shop, and he says a lot of people "abuse" their cars, which is why their engine life isnt too lengthy.

Michael (not a rotary buff by any means, but wants a project S13 and RX7 when he grows up)
noone realizes that if your rotary overheats, then you're screwed. All people need to do is not tune them so hard, and pay attention to the temp gauge, and their engines would last much much longer.
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Old 10-09-2002, 09:38 PM   #9
skyliner33v
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Drop in a chevy small block in there.

http://members.tripod.com/~grannys/rx7.html

Cheap.


jason
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Old 10-09-2002, 09:44 PM   #10
MattSEG
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I know overheating is a problem, it's a case of not being dumb when tuning it, not beating the piss out of it all the time, and getting a better radiator. I didn't know about the fc being suited for a 3 rotor.....definetly talk to Colin about it.

and where the hell did you see the 20b/tranny for 2k!!!!!

...I'm thinking about this more and more
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Old 10-09-2002, 09:54 PM   #11
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www.rx7club.com - tons of great advice

a word of warning though, rotary motors tend to die around 100,000 miles...it is very possible this one will need new apex seals very soon, not cheap
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Old 10-09-2002, 09:59 PM   #12
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Quote:
Originally posted by MattSEG
and where the hell did you see the 20b/tranny for 2k!!!!!
my guess is he's full of crap, the engine is completely blown with a cracked rotor or two, or it's really just a 13b
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Old 10-09-2002, 10:11 PM   #13
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This picture makes me not want one
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Old 10-09-2002, 10:12 PM   #14
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why? is that what you look like?
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Old 10-09-2002, 10:28 PM   #15
MattSEG
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If he was a 6'2" 190lbs Jew wearing jeans and a cowboy shirt, yeah....but he's not.
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Old 10-10-2002, 09:12 AM   #16
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again, rotaries DO NOT die at 100,000 miles! Did you ever own one? I did.

I bought it with 88,000miles, and sold it at 120,000 miles. I saw it two years later, with 150,000 miles, and all he'd replaced was the exhaust!

If you only know things from hear-say, don't pawn them off as fact.

And Matt, trust me, it was designed to house a 3-rotor, but that idea fell through to the turbo.
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Old 10-10-2002, 09:31 AM   #17
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First, go here: http://www.fc3s.org/

Now, about the rotory and its durability...it's a toss up. Anyone that says a rotory is reliable is in denial. Sure, some lucky guys never have problems, but there is good reason why so many others have. Even if you take the best of care of it, you really never know...especially if you plan on making power (just look at SCC's project FD). Great cars, great fun, but 9 times out of 10 it's a time bomb.

Lastly, don't confuse me as being some kind of rotory hater...I am actually in trying to decide whether or not I should start my own project FC. I know of one 86 FC (n/a) that runs and only needs a clutch that someone will give to me for free. I also have a neighbor w/ a 91 FC (n/a) that will sell me his for $400...but it has a bad engine (lost compression).

Really what I want is an FD...
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Old 10-10-2002, 09:41 AM   #18
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Quote:
Originally posted by Dori Dori


Really what I want is an FD...
who doesn't?

but seriously, the only engines that die (even on the FD's) are the people who beat the crap out of them. There have been plenty of people who have taken care of their engines, changed oil/coolant regularly, not modifed their turbo or air/fuel misture, and the engine lasts well over 100,000.

But with a car like that, who's actually not going to beat on it?
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Old 10-10-2002, 10:57 AM   #19
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I think the rotary started out with a poor reliability reputation from the start because people didn't understand that they are designed to burn oil... It's actually injected into the intake to lubricate the apex seals... So, people think, "hmmm... burning oil, must be a bad engine..." Just my thoughts....
I too, have seen well-maintained N/A rotaries last well over 200,000 miles.

Also, it's easy to kill a rotary (at least an early one...) just changing coolant. If you don't bleed the air out of the top of the engine, you can just get an air pocket that never moves, and it'll eventually warp your housings.
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Old 10-10-2002, 11:05 AM   #20
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My brother in law has a 94, and trust me, they don't respond well to mods. They are very very touchy machines. He's had it rebuilt once already, and it doesn't even have 70k miles on it. He lives in Boston and takes it to PA once a year for a complete overhaul.
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Old 10-10-2002, 11:06 AM   #21
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Quote:
Originally posted by hotsam
My brother in law has a 94, and trust me, they don't respond well to mods. They are very very touchy machines. He's had it rebuilt once already, and it doesn't even have 70k miles on it. He lives in Boston and takes it to PA once a year for a complete overhaul.
he's in Boston? Get him to email me, I want a ride in that car!!!
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Old 10-10-2002, 11:21 AM   #22
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Quote:
he's in Boston? Get him to email me, I want a ride in that car!!!
Dear Brother in Law,

Some guy I don't even know wants a ride in your car. Please contact him and set this up. I don't care if you think this is creepy or weird, just do it!

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Old 10-10-2002, 11:23 AM   #23
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yeah, that sound good! tell him he can drive my Opel
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Old 10-10-2002, 11:29 AM   #24
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rotaries are a unique beast...and a N/A rotary may not have many issues, but matt specifically said he wants to turbo it so we might as well talk about that...and although they produce a ton of power in a small package and are a lot of fun, they are a much bigger headache than a standard engine...i do speak from experience working on my roommate's FD and my neighbor's FD, and their friend's FD
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Old 10-13-2002, 04:57 PM   #25
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I'm thinking of getting the car with the cosmo 20b swap more and more. The cosmo engine is roughly 280hp stock, and minorly modded (exhaust, and perhaps single turbo with same boost conversion) to be good for roughly 350hp.

This, in proportion to a stock fd turbo, sounds like a reasonable amount of power for a 3 rotor as opposed to a 2 rotor. That said as long as I keep plenty of fuel getting to the engine, a good radiator, and run stock boost normally, it should be reasonably reliable. With a cruising power of 350hp, I'd be able to take many many cars, and that would be with a paltry 5psi if not less. So if something worthwhile came by I scramble boost setting up to say 10-15psi (all fuel and whatnot setup to accomadte this) It should be putting out 600+hp which seems like it could kill damn near anything....well considering this car would be lightened a good amount.

If I do indeed go through with this, which is looking increasingly tempting, I would want to do as much of the engine work as possible, so I would certainly need to invest in some reading matierial, but it should be quite do-able.

The notion of 500(ish)hp of rotary fury on a 2800lbs car (lightened) is something I'm certainly drooling over.

-Matt
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