kantfadedisazn

i just bought a 1990 rx7 gtu, i was wondering is that the model taht came with the 4pot calipers or 2 pot?

Icemark

That can be found in the Standard Features and Options sticky thread found at the top of this section:
https://www.rx7club.com/2nd-generation-specific-1986-1992-17/specifications-what-did-2nd-generation-rx-7-come-w-options-standard-features-249616/

But if you have a 90 GTU, you have a base model with single piston brakes and a solid rear barake rotor.

kantfadedisazn

dam that sucks i dont have the 4pot calipers,i guess ima have to buy them then, they should bolt right up correct?

Icemark

Yes and no.

Whizbang

(youll need the hub assembly as well)

kantfadedisazn

y would i need that gtu are 5 lug so wouldnet that just bolt up ?

kantfadedisazn

and the gtu has the same exact rotor size and everything like the gxl and turbo II only diff. it has the 1pot caliper and not the 4 pot from what im seeing on this link here https://www.rx7club.com/showthread.php?t=249616 but i dunno what to do, everything is the same exact just the calipers are diff. so it should bolt up right, i dunno

kantfadedisazn

ok here are the pics of my car can u tel me what it is cuz im confused, because gtu dont have back seats but mine does i dunno here they are

kantfadedisazn

im confused now this is an article from wikipedia stating that the series 5 came with 4pot calipers? and whats crazy too is that i have rear seats?

Second generation
Series 4 (1986–1988) was available with a naturally aspirated, fuel-injected 13B-VDEI producing 146 hp (108 kW). An optional turbocharged model, known as the Turbo II, had 182 hp (141 kW).
Series 5 (1989–1992) featured updated styling and better engine management, as well as lighter rotors and a higher compression ratio, 9.7:1 for the naturally aspirated model, and 9.0:1 for the turbo model. The Turbo II moniker was dropped, and the turbocharged model was simply dubbed Turbo. The naturally aspirated Series 5 FC made 160 hp (119 kW), while the Series 5 Turbo made 200 hp (147 kW).
The second generation RX-7 ("FC", VIN begins JM1FC3 or JMZFC1), still known as the "Savanna RX-7" in Japan, featured a complete restyling reminiscent of the Porsche 944. While the SA22/FB was a purer sports car, the FC tended toward the softer sport-tourer trends of its day. Handling was much improved, with less of the oversteer tendencies of the FB. Steering was more precise, with rack and pinion steering replacing the old recirculating ball steering of the FB. Disc brakes also became standard, with some models (S4: GXL, GTU, Turbo II, Convertible; S5: GTUs, Turbo, Convertible) offering four-piston front brakes. The revised independent rear suspension incorporated special toe control hubs which were capable of introducing a limited degree of passive rear steering under cornering loads. The rear seats were optional in some models of the FC RX-7, but are not commonly found.

Though about 80 lb heavier and more isolated than its predecessor, the FC continued to win accolades from the press. The FC RX-7 was Motor Trend's Import Car of the Year for 1986, and the Turbo II was on Car and Driver magazine's Ten Best list for a second time in 1987.

In 1988, a convertible version started production in atmospheric and turbocharged form, proving an instant success. Despite production ceasing in October 1991, Mazda built a limited run of 500 convertibles for 1992 as "specials" for the domestic market only. In Japan, the United Kingdom, and other regions outside the US, a turbocharged version of the convertible was available.

In the Japanese market, only the turbo engine was available; the atmospheric version was allowed only as an export. This can be attributed to insurance companies penalising turbo cars (thus restricting potential sales). Overall, the second generation was the most successful for Mazda saleswise, with 86,000 units sold in 1986 for the US alone.

Icemark

Any reason you are not reading the link I posted for you above??? You are not understanding. Tried to make it real simple.. even gave you the link (https://www.rx7club.com/showthread.php?t=249616)

Yes, that is correct.

You don't have a GTUs. You have a GTU.

It says some models then lists the models. Says nothing about a S5 GTU getting 4 piston front brakes and vented rear brake rotors.

adrock3217

But uh..doesn't the GTUs come with a 160mph speedo, unlike the GTU with its 140mph speedo? >.>;

Icemark

I don't know how to make it more simple...

Okay, here goes.

The bolt hole for the single piston brakes is in a different place than for the 4 piston brakes. This requires using a different Hub.

Brake Rotor size is different. (9.8 inches vs 10.9 inches found on the 4 piston brakes)

The soft line is a different length. You might be able to bend the line to fit, but it would not be correct. And wouldn't you worry about a line snapping and leaking???because of the extra tightness and the like.

The Brake booster and master cyl are different. Sure you could use the single piston ones, but again it would not be correct and additional force would be needed to stop, negating the need for the 4 piston brakes in the first place.

I understand the proportioning valve is also different, this would mean that the brake pressure would not be distributed correctly. Again you could probably use the single piston one, but then you may get one wheel or one end locking up before the other end when panic stopping.

13b4me

Didn't all S5's have the 160mph speedo?

Icemark

since no one will look:

89:

and


But wait... 89-90 GTUs not the GTU, but rather the GTUs

Icemark

NO

And

NO and NO

kantfadedisazn

did u see my pics, from those what is ur opinion on what it is, i know im being dumb about this but i dont even know, that is why im asking

Icemark

what are you asking??? yes you have a busted oil pressure and tempature gauge, yes you are missing interior parts, yes your radio is gonna get stolen because its just laying there.

kantfadedisazn

yeah i know that i mean im asking what model is if from what u see

Icemark

You have a S5 GTU. It has a rear seat, and does not have power windows.

stevie1020

dude listen to icemark he is a god on these types of things

13b4me

Well Icemark, there seem to be some inconsistancies here... His pictures clearly show a voltmeter and 160mph speedo! No need to get pissy about it!

Icemark

Not at all...

Your comment was:

On the 89 models (as clearly posted on the first page of this thread) only the Turbo had a 160 mph speedo the rest got 140 mph speedos. It was not until the 90 models (except the 90 GTUs) that all got the 160 mph speedo.

So again No not all S5 models got the 160 MPH speedo.

My5ABaby

iTrader: (7)

Why is his oil pressure and temperature gauge busted? Is it because they're below the bottom marks?

kantfadedisazn

i understand u said they are diff sizes . but why do they state that they are all 10.9 inch in the front from the page u gave me?

and how can i fix the gauges

Icemark

Yep.

Generally the only time they are below the line is when the gauge has been dis-assembled and incorrectly re-assembled.

So even if they move, calibration will be off