82streetracer

iTrader: (1)

My radiator is shot, so I need a new one.

I dont do alot of track driving, but I do a lot of street racing.

By next spring I will be running a streetported motor, with with one of the vented CF hoods one of the members is building,

Should I go 3 core or will the stock rad work,

the stock one is considerably cheaper for me because I work at a mazda dealer,

thanks

CrazyJoe12a

I put the MazdaTrix 3 core in mine and think it was a great investment. Of course mine is used mainly for AutoX and only occasionally driven around town. But even idling in grid for several minute after a run, it stays nice and cool.

Directfreak

iTrader: (2)

Isn't the 79-83 & GSL-SE ones all 3 core? I think the only 2 core ones are 84/85 12A models.

Check at work, I want to confirm this myself.

diabolical1

iTrader: (3)

I thought the 79-82 rads were the 3-core (short and thick) and all 83-85 were 2-core (tall and thin) , or am I WAAAAY off?

jeremy

iTrader: (1)

that sounds closer. i know the radiators for the 79-80 were shorter and 3 row for the oil cooler to mount under it. this was the best setup mazda released on the 1st gens.

Keaponlaffen

woot... I finally got the good end of some deal.... i just got a rad for my car outta an '80 with 75,000 kms on it This came after mine blew up in the middle of nowhere in 104 degree farenheit weather

Too bad she rusted out (the parts car at the wreckers)

Jeff

MIKE-P-28

iTrader: (1)

My stock radiator was a 1 row on the 85.

RotorMotorDriver

iTrader: (1)

Weird, mines a two row/core/whatever on my 85 GSL

~T.J.

moremazda

iTrader: (4)

All stock radiators for first gen are 2 core!! The end tanks on the 79-82 are capapble of being streched over a radiator core the has 3-rows. By design the 84-85 (including the SE) can not be stretch over a three row core. That is why Mazdatrix only sells a 3-core for the 79-82. IMPO the larger surface area of the 84-85 has a greater cooling capacity than the three core, and is therefor the better option/upgrade.

Ryan

Directfreak

iTrader: (2)

Can somebody post the link to the right radiator from Mazdatrix? I couldn't find it. I looked on their site and found only hoses and such.

MIKE-P-28

iTrader: (1)

I swear mine was a 1 row, and I couldnt imagine an aftermarket place making a raditor that was a 1 row, so it had top be a factory radiator. Ask mwpayne he has my old radiator...

85RX7GS

iTrader: (1)

Go with the stock one if it's more economical for you and use the money saved for a nice electric fan or something.

diabolical1

iTrader: (3)

hey directfreak ~

i might be out of the loop or something, but aren't you running a Cosmo 13B engine or something? or do you have another Rx-7 that you need a radiator for?

i'm asking because i think i read somewhere that the stock radiators are good only up to the 175-200 HP range, and i'm assuming that your motor is pushing more than that. just don't want to see you cook it - that's all.


http://www.mazdatrix.com/b8.htm

our radiators are at the bottom of the Gen II list - don't ask me


on a side note, my brother adapated a Gen II radiator to his 83 GSL, but i honestly, don't know the mounting details. i can tell you that it looked a little ghetto, but i don't see any reason why you couldn't clean up the install with a little time. i'm telling you this because i was wondering if maybe you'd want to consider running a T2 radiator.

Directfreak

iTrader: (2)

Thanks for the Info Diabolical. A stock GSL-SE radiator is fine for my application. That's what all the guys down here use on their daily drivers. Even that 10 second 12A I posted earlier. My car should not run hot at all.
I have a black magic (2800cfm) fan, Water Wetter, and the correct 75%/25% mix of the orange coolant and green coolant. No water at all in the system.

I was asking because I either want to get mine cleaned out and re-cored (to be safe), get a new one altogether, or look into an upgraded (bolt-on) one.

Again, Thanks for the Link, I felt stupid.

Directfreak

iTrader: (2)

On the same subject..

Does anybody have any experience with Radiators.com

They list my radiator for only $119.00 and it is supposedly the stock replacement. I just don't feel comfortable that when I select1985 RX-7,
I only get the 1.3L (fuel injected 13B) option,
(what about 12A people?) and that they list
this picture as a 1985 Mazda RX-7.



My guess is they may just sell the upgraded GSL-SE Radiator to everyone with a First Gen.

So - does anybody know anything about them?

Thanks.

jeremy

iTrader: (1)

can someone tell me where to purchase that '85?

moremazda- the 79-80 are thicker. whether its 1 core vs 2, or 2 vs 3 i don't know but the 79-80 is thicker.

82streetracer

iTrader: (1)

I think im just going to get a stock replacement from my dealer, along with a new thermostat and a 2nd gen alternator.

Keaponlaffen

Why doesn't mine look like that?

By the way... I find my radiator to work great, and I have a '79 with an '80 rad in it. Hot days (102+ farenheit, 40+ celsius) are nothing for my stock clutch fan to keep the engine cool... Maybe I'm just lucky?

Jeff

MIKE-P-28

iTrader: (1)

Over at RC Bratcher's where I got my radiator there book listed a 85 Rx-7 Turbo! I swear it said Japan only But listed it, I said Um Ill take that one LOL

diabolical1

iTrader: (3)

i may stand corrected, but i don't think the radiators were different between 12A and 13B for the 84-85 cars. i think there is just a difference in the upper hose because the water pumps were different. i don't know where to confirm or dispel this, but i think they are the same.

Directfreak

iTrader: (2)

Well according to the parts diagram that I have,
They are both the same part number.

HOWEVER, it definately shows the GSL-SE one to be different because it mounts on top of the oil cooler, the other does not.

diabolical1

iTrader: (3)

shwing ... and it's a pop fly to center field ...
directfreak makes the catch ... and the diabolical1 is OUT!

thanks ...

jeremy

iTrader: (1)

i thought the cooler mounted in front of the se radiator. i'm pretty sure the one i tore down was like that and mazdatrix or some website had the same thing.

Directfreak

iTrader: (2)

See page 52 of This Parts Diagram PDF File. To see the 84/85 12A Cooling system.

See Page 53 for the GSL-SE Cooling system.
See the radiators and Oil Cooler mounting.

BTW, you may have to click, "Save As."

82streetracer

iTrader: (1)

I cant get a rad, from my dealer so Im going to go with the Mazdatrix 3 core. That should supply enough cooling for any mods I install in the future.