Quick question on RB radiator

Discuss the RB20, RB25 and RB26 series engines.
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Aznboi64
Posts: 122
Joined: Fri Nov 29, 2002 8:33 pm

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I used the search button but I couldn't find any info on it. Is everyone using their stock RB radiator? If so what would I need to do to make it work in my s13? Will the SR20det afermarket radiators work with the RB?


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NISMO_RB25
Posts: 1066
Joined: Thu Nov 06, 2003 4:40 am
Car: 1992 240SX with RB25DET, 1987 RX-7 TII

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The 240 radiator has the outlets on the correct side (the SR is different). You can use the stock 240 radiator, with different hoses. (I spent about an hour in Autozone and found what I needed)You can use the RB radiator, but I believe you need to do a little bit of modifications.You can also use any radiator for the KA 240. I am using a Koyo for a 240.

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Project240
Posts: 773
Joined: Fri Mar 21, 2003 5:42 pm

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My RB20 radiator bolted right into my S13 with no mods whatsoever.

SeVa-S13
Posts: 8478
Joined: Thu Jan 23, 2003 9:11 pm
Car: '05 GTO 6spd

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I'm using the stock R32 radiator, it's a bit tall but fits fine. Although once I added dual pushers, the shroud bit extended just beyond the top tank's lip thing so it doesn't sit flush again't my radiator support. (It leans slightly forward)

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Aznboi64
Posts: 122
Joined: Fri Nov 29, 2002 8:33 pm

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Thanks guys for giving me your info. Now about the electric fans. I can get them pretty cheap, but am I looking for dual fans or will one just do? Also what cfm am I looking for? Oh and I'm getting the RB20 motor to clear up any miscommunications.

Project240 - Do you have a RB20?

NISMO_RB25 - What mods would I have to do to make the RB20 radiator fit? I hope its not cutting and welding.

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Project240
Posts: 773
Joined: Fri Mar 21, 2003 5:42 pm

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Yep, I have an RB20 in my S13. I'm running the stock RB20 radiator, and one FAL 12" electric pusher fan, 1200 cfm. No overheating problems, but I also have a 1.3 bar rad cap, a bottle of water wetter in the coolant, and a fresh Z32 thermostat.

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BoostFab
Posts: 3529
Joined: Wed Dec 03, 2003 8:23 am
Car: S13cp, S13fb, S14z
Location: Nismo Land
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i'm using the stock rb20 radiator on my s13. it fit just fine with two 12" slim pusher fans.

blk90s13
Posts: 679
Joined: Tue Dec 31, 2002 10:53 am

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i had a rb rad then a s13 stock rad now i have a s14 stock rad on the car

going for a koyo in a week tho

now will i have to use a mount kit to clear the koyo ? or will it fit with the stock r-32 mounts and cross member ?

NightKids2
Posts: 231
Joined: Mon Oct 18, 2004 5:25 pm

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When I got my clip my radiator didnt have a cap on it and it looks a little rusted on the inside, so I think Ill keep the KA if its not going to strain it

theXfiend
Posts: 27
Joined: Sun Oct 24, 2004 7:47 am
Car: 1992 240sx coupe SE w/ rb25det

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the SR20 radiators will not worth without some really weird piping to go to them

the upper radiator inlet is on the opposite side of the engine, and because of how the coolant hose comes out of the RB it would have to make an S just to get to the radiator.

a Koyo KA radiator will work fine


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