1st Generation Specific (1979-1985) 1979-1985 Discussion including performance modifications and technical support sections

SA oil cooler vs GSL-SE oil cooler ?

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Old 02-01-10, 02:24 PM
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SA oil cooler vs GSL-SE oil cooler ?

Anyone know what the real differences are in these two FMOC's in size and performance ?

Trying to decide for a T2 swap.
Old 02-01-10, 02:56 PM
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FC too?

Can we add the FC oil cooler to the discussion, too?
Old 02-01-10, 04:33 PM
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For cooling capacity they are all nearly the same. For longevity and less failure rate, go with the FC mod in my writeup.
Old 02-01-10, 04:40 PM
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you should go with a beehive, those are the ****!
Old 02-01-10, 08:09 PM
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Old 02-01-10, 08:12 PM
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Just go with a second gen oil cooler.
Old 02-01-10, 08:16 PM
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the CORE size of the GSL-SE cooler and FC coolers are identical. the FC has bigger endtanks slightly, different mounting and the banjo fittings

the FC cooler is WAY easier to find (3 to 1 in my garage!)

i don't have a 79-82 cooler to compare.
Old 02-01-10, 08:21 PM
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Originally Posted by bad 83
Just go with a second gen oil cooler.
Main reason I am asking is I have a perfectly good 79 rad and oil cooler already
Old 02-01-10, 08:24 PM
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That oil cooler will work fine. I just have had way better luck with second gen oil coolers not leaking. That's all.
Old 02-01-10, 08:41 PM
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even the old REPU oil coolers are almost identical to the FC cooler so i have to assume the 1st gens are the same core as well.

true about the 2nd gen oil coolers though. the bosses on them are way more durable and less susceptible to cracking.
Old 02-01-10, 10:00 PM
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I could be wrong, but I thought the SA OC was made for the 12a and the FB/FC was made for the 13b....

Maybe it's time for a oil temp gauge.
Old 02-01-10, 10:06 PM
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The oil cooler cooling capacities are the same regardless. The temp bypass in the SA oil cooler opens a little earlier than the second gens. That means that the SA oil cooler will let oil flow through it at a lower temp. But if it was me, I would do the bypass mod to the oil cooler to let oil flow through it all the time.
Old 02-01-10, 11:44 PM
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i'm running rx4 rad and oc. i think they're all bout the same size wise. mounting is different tho.
Old 02-02-10, 12:35 AM
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Originally Posted by bad 83
But if it was me, I would do the bypass mod to the oil cooler to let oil flow through it all the time.
Wouldn't that overcool the engine?
Old 02-02-10, 04:59 AM
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the major difference between the SA oil cooler and the SE oil cooler is the spacing and angle of the bungs. the angle is greater for the SE.
Old 02-02-10, 06:28 PM
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subscribed b/c i'm also trying to decide which 1 to use for a t2 swap
the how to "bypass mod to the oil cooler" is it documented/archived?
Old 02-02-10, 07:20 PM
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Maybe someone can answer this. Can I take a S3 FMOC and use my 12a oil lines to connect it to my motor?
Old 02-02-10, 07:33 PM
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By S3 you are referring to the GSL-SE oil cooiler correct?

S1 & S2 Rx7 had FMOC and S3 had Beehives except the GSLE which had a FMOC

If you want to use A GSL-SE FMOC I believe you will need longer oil lines, so I don't believe your 12 oil lines will work.
Old 02-02-10, 08:28 PM
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no they wont work the 12a lines are much shorter
Old 02-02-10, 08:33 PM
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Originally Posted by Whisper
Wouldn't that overcool the engine?
No. It will take a little longer for the oil to warm up. Mazda went as far as using a thermal pellet behind the front e-shaft bolt (on S4 and later) to restrict the oil flow and make the oil warm up quicker. I suppose they were trying to accomidate the bust it off and drop in gear crowd. I always let my 7s warm up before they are driven. But hey, I guess that's just me?
Old 02-02-10, 08:41 PM
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Originally Posted by ©ØÐËߣüË
no they wont work the 12a lines are much shorter
I thought the front GSl-SE 13B line going to the front cover was shorter because the engine sits closer to the front.

I replaced the beehive on my 1985 12A with a GSL-SE FMOC. I ordered the RB GSL-SE 13B stainless steal braided lines and found that they where to short. The GSL-SE bungs are at an angle so I ended making my own lines with -10 stainless steal line and added a 45 degree angle connector to the FMOC to compensate for the angle.
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