Hi guys.. I'm a bit of an RX7 amature and came here cos I wanna learn more about the great car.. what engines has the RX7 had from past to present? I know the latest one here in England was a 2.6 twin turbo.. thanks for the help guys

 

1.3 Liter twin turbo. The piston "equivalent" would be 2.6 Liter.

 

Thanks for ya help

 

The 1st generation (FB) ran from 1979-1985 and had the 12B 1.2 liter NA engine. The 2nd generation (FC) ran from 1986-1992 and had the 13B 1.3 liter engine and came in NA and turbo. The NA FC had 6 ports (two auxiliary intakes) for better performance. The 3rd generation (FD) ran from 1993-1995 here and through 2002 in Japan, and has the 13B twin turbo motor. Hope this helps.

 

they all have the rotary, in the uk they "double" the displacement for tax reasons, so our 1.3litres engine is your 2.6.

79-85: the rx7 had a carburated 1146cc (2.2l) 12a engine, over here it was rated at 100hp. for 84-85 they added a 1.3l (13b) engine it had fuel injection and "6 ports", they added 2 intake ports and it had valves to open at high load, 135hp

86-88: they all have the 13b, the non turbo was a revised version of the previous one 146hp. they also had the turbo, it was based on a 4 port (like the 12a) and it made 182hp

89-91: again revised versions, the non turbo added a variable intake manfiold 160hp. the turbo got a better turbo 205hp

92-02: the 13b was again revised, with larger ports better bearings etc, it also got the twin sequential turbo system from the cosmo, and 255hp

89-96 cosmo: these engines came in 2 flavors, the 2 rotor 13b, with twin sequential turbos 225hp. it also came in a 3 rotor (20b) form (a 3rd rotor added on) with twin turbo's 300hp

mike

 

So how much potential do the 84-85 13b motors have?? About how fast are they running?? How cheap are they to make fast?? Sorry about the dumb questions but i am new at rx-7's and i am looking for a drag car.

CORY

THANKS FOR THE HELP

 

ultimately, it's all going to come down to what you have in your plans.

the 84-85 13B engines have roughly the same power potential as the newer 13B's - it's just that they have different housings (the water rings) and slightly heavier internals.

 

Pretty much it'll be used as a drag car. (Since I have my sentra as a daily drive.) It needs to be able to run high 13's pretty easy and no so expensive. I would keep going with my sentra but its just to much money to get it under 16's. Thanks for the help again.

CORY

 

if you want a cheap drag car to hit 13s, just buy an old Mustang 5.0 or Camaro Z-28.

 

well, what kind of budget are you working with? getting an Rx-7 to run high 13's is not an issue, but all in all, i REALLY don't think it would cost a lot MORE than getting your sentra to run less than 16's.

so now it comes down to money, and if that's your deciding factor ... as much as i hate to recommend an American car, i'd probably have to agree with rynberg (although i don't know how available the pony cars are over there in Britain)

how much does one of those RS200 Escorts cost? or a Pegueot (sp?) 206?

 

That's US-spec. UK-spec had higher HP from the 12A and they didn't get the GSL-SE, which was a US-only car. There were a couple companies in the UK converting 12A cars to turbo (Elfords is one of them) and I've heard of a few factory '83-85 RX-7 Turbo models floating around too.

Japan wouldn't sell the US the 12A Turbo, so they put the new 13B 6-port in the car instead, just for us. (since we don't know what to do with turbo cars except ruin them )

Also, a 12A works out to 2.3 not 2.2. It's actually the same as a 2.3 Ford.

 

i know we want a 900 year warranty and 1000hp, while not upsetting the neighbors, so we get niether

mike

 

Well, I live in the u.s. in Washington state. Now my question is you said it would take money. About (estimated because i know there is no real #) how much $ would it cost to make a 13b powered rx7 run into the 13's. (starting off in N/A form).

THANKS FOR THE INFORMATION

CORY

 

OOOPS! My bad ... I mixed you up with the guy that started the thread ... sorry, bro'! I just wasn't paying attention when I wrote the last post.

Anyway, estimated costs is still a hard one because I don't know how much of it you can do for yourself. All I can say is this ... get a Gen I car (I believe the 1981 S model was the lightest, though I may stand corrected) and then transfer the transmission, suspension and rear from an SE into it. Then just do a large streetport or a mild-to-mid bridgeport on a 13B motor (concentrate your build-up on reliability, so I would suggest getting hardened gears, and a T2 oil pump, and having everything race-balanced, etc.)

That's the road that I would suggest traveling, obviously, no roads are "cheap", but I believe it to be cheaper and easier than forced induction, and "slightly" less prone to human/driver errors (poor maintenance, or poor tuning, etc.)

This is just my opinion, but I'm sure you'll hear others that are no more/less right than this. Spend some time going through the Gen I and Gen II forum and see what you think suits you better.

Good luck!

 

a decent street port 12A or 13B in a mildly lightened 1st-gen should do 13's easy.

I figured that I'd need 250hp at the flywheel to run in the 12's, a street port (12A or 13B, power is the same just the 12A revs higher) should do 13's easy assuming the engine is tuned right and the combination is sorted and the driver knows what the hell he's doing.

Or, like someone else said, buy a used 5.0 and throw gears and slicks on it and run low 13's/high 12's all day long.

 

Thanks all of you for your help. I am still trying to decide. I dont want my daily driver to get beaten to death. I just got back from the races today and my sentra ran a 16.3. (Just thought i add it

THANKS
CORY

 

So what i think i am hearing is that a base modle rx7 with a 12a motor is the way to go??

 

That'll run high 16's-low 17's in stock form. You need to work at it from there, so just consider that a "Starting Point" and prepare to go on a journey.

 

I found a 1984 mazda rx-7 that is pretty close to were i live. They are asking 650$ for it. They say there is a rebuilt motor with 25,000K on it. New batt. new alt. brakes, master cylinder, and ect. Would this are be a good starting point for me?? THANKS

 

If you want a drag car, best to start with something '83-earlier. '84-85 has a different rear suspension geometry that isn't as good for drag racing.

You're going to replace the engine anyway, for what it's worth, if you seriously want to hit 13's.

 

So if i really want to hit 13's then i should be running a 83 or earlier with a 13b swaped into it?? correct? Thanks peejay you have been so much help with everthing.

CORY

 

you don't need a 13B but you will need either a ported engine or a turbo.

 

SO if i found an 83 or earlier base modle rx7 12a powered and got it ported it would be a good setup?? Jezz i ask alot of questions uh.