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Gooserider 04-20-2004 08:06 PM

Single pass rads, a list! (possible sticky?)
I've seen several discussions where people were looking for different sizes of single pass rads. Airspirit's database never really made clear which rads were Single and which were dual, and now that it is down, the information is even more needed.

I went through the catalog at, and compiled the following list of FedCo numbers based on the pictures. As usual the sizes are for the fin areas ONLY, and don't include the tanks. As a very rough guide, I would add about 1.5" to the 'H' dimension for the tanks, more if the rad has end I/O fittings

A few other notes - The applications are not specific, they are what was listed in the catalog with the pictures.

I made notes on most of the I/O fittings, and define them as follows: (assume you are facing the fins, with the tanks at the top and bottom)

Face: fitting is on the same plane as the fins, pointing at you

Side: fitting is on one end of the tank, pointing to the left or right

End: fittings are on the top and bottom of the tank, pointing up or down.

Same: fittings are on the same corners of the tanks on each end (this is not the best for circulation in theory)

Opp.: fittings are on opposite corners of the tanks

not stated - I didn't make a note, look for yourself ;) but I think most are same

I'm not guaranteeing that this is 100% accurate, it's based on notes that I took a long time ago.

All dimensions in inches. Note that in many cases, especially when the rad has long pipes coming off the fittings, the dimensions for the I/O fittings apply only to the ends of the tubes, the actual pipe coming out of the rad may be smaller.


FedCo #  H      W        T      I          O              App and fitting notes
2-149    7.75  6.125  2    .625    .625    Ford face out / side in
2-208    7.75  6.125  2    .625    .625    Ford side
2-209    9.875 6.125  2    .75      .625    Ford side
2-210    9.875 6.125  2.5  .75      .625    Ford side
2-215    7.75  7.375  2.5  .625    .5        Chrysler side?
2-216    7.75  6.125  2    .625    .625    Ford side
2-217    7.75  6.125  2    .75      .625    Ford side?
2-272    9.875 6.125  2.5    .75    .625    Ford side
2-275    9.5    6.125  2      .75    .625    GM  side
2-284    9.875 6.125  2      .75    .625    Ford side
2-285    7.75  6.125  2      .75    .625    Ford side?
2-317    9.875 6.125  2      .625  .625    Ford side

2-342    9.5    6.125  2      .75    .625    GM  face outs, w long snaky pipes.  .75 end is actually .625 @ rad
                                                                This is possibly the most popular single pass, it is from late 60's
                                                                  Chevy pickups

2-353    9.5    6.125  2      .75    .625      GM side
2-549    5.25  6.375  2.625 .625  .625      Nissan / import  end
2-551    5.25  6.625  2.625 .625  .625      Nissan / import  face out / side in
2-553    6.375 6.125    2      .625  .625      Nissan / import  opp. side
2-611    6.25  6.125    2      .625  .625      Toyota / GM imports Opp corner end outs
2-617    9.875 6.125    2      .625  .625      Ford L 800 / 900 truck Side outs
2-726    7.625 9.75    1.125 .625 .625x2    Ford has odd plumbing, note 2 outs / 1 in
2-766  14.188 3.25    1.625 .625 .625        Renault end
2-770    9.188 6.875  1.625 odd  .625        Winnebego end I/O odd fitting is an o-ring
2-531    20.5    3.125    2      .625 .625        Ford Econoline rear, 75-91 face / side

Hope this is helpful to someone....


Gooserider 04-20-2004 08:08 PM

Sorry about the formatting, it looked good before I submitted it, and the board messed it up.


Administrator 04-20-2004 08:14 PM

yeh the code font doesnt seem to be a fixed width font anymore, I may have to look into tweaking that.

bigben2k 04-20-2004 09:26 PM

Yeah, and that website has since changed its content, drastically... :eek:

Wasn't someone mirroring the info? I used to have a backup of the pics, right now I just have the dims (they're zipped in the sticky, btw).

joemac 04-20-2004 10:57 PM


Originally Posted by Gooserider
Sorry about the formatting, it looked good before I submitted it, and the board messed it up.


Why don’t you take a snapshot of the screen then attach it to the post as a picture.

Gooserider 04-21-2004 07:29 PM

Don't complain Joemac... Took me long enough to type it in,and the data is all there even if it is kind of messy. I think anyone really interested can figure out what they need to. Hopefully if they are able to fix the code font it will straighten itself out.


snowwie 04-21-2004 07:59 PM

hmm, the end fitting cores seem interesting

single passes are popular because they have less head loss than dual passes, these end fitted cores would have very little effect on flow rates i would expect, since there is little to no turns

how to route the tubing within a case is another story altogether

thanks a lot for the compilation


2-210 9.875 6.125 2.5 .75 .625 Ford side

hmmm...i like

joemac 04-21-2004 08:08 PM


Originally Posted by Gooserider
Don't complain Joemac... Took me long enough to type it in,and the data is all there even if it is kind of messy. I think anyone really interested can figure out what they need to. Hopefully if they are able to fix the code font it will straighten itself out.


No complaint just a suggestion :D

Gooserider 04-21-2004 10:17 PM

I wouldn't expect there to be a big difference in head losses from different I/O locations. No matter what the location is, for most of the tubes they will have to make at least two right angle turns at each end; one to flow along the tank, and one to go from the tank down the tubes. An end or face I/O has the same turns. A side I/O does have the advantage of flowing along the tanks so you get rid of one bend.

I am not sure how much restriction the I/O - tank bend actually causes, since it is fairly large radius and the tank is larger than the I/O fitting. I suspect it is only a tiny fraction of the total for the entire rad.

Likewise, the difference between same corner fittings and opposite corner fittings is something I suspect might be mostly theoretical. In an opposite corner design, the distance between the I/O fittings is the same for all tubes, so all should see the exact same flow. In the same corner design, the distance varies from tube to tube, and in theory the shorter distances ought to get more flow. In practice however, I suspect that the tubes are restrictive enough that the difference will probably be negligible since the input tank would be supplying roughly the same amount of overpressure to all the tubes.

All else being equal, an opposite corner, side I/O rad (2-553?) might be best, but one would have to be very careful that the losses from any added plumbing or bends needed to deal with the I/O location doesn't amount to more than the gains. I think one is better off sticking to an I/O location that is easy to plumb, which is why I (and lots of other folks) choose the 2-342 for it's opposite corner face I/O design.


snowwie 04-23-2004 11:20 PM

yeah, I meant that the side I/O placements would be better
and from a glance of the numbers posted, the one I mentioned seems nice, and also easy to plumb since the I/O's are both on the same side according to pics

any disadvantages to having a heatercore thicker than 2 inches?

Blackeagle 05-16-2004 02:13 PM

Nice Gooserider! I went through the old data base once sorting all the single pass rads, wish I'd kept all the data, but didn't.

I can tell you this though, 2-342 is the only single pass rad that offers a finned surface area large enough for dual 120mm fans, face (finned) inlet/outlet & with the inlet/outlet at opposit corrners of the face side.

Gooserider 06-02-2004 07:02 PM

There are problems with thicker heatercores, namely increased airflow resistance and therefore reduced efficiency. As a practical matter, the limiting factor on most setups is more airflow than coolant flow. I've seen some threads that actually say the optimal thickness is actually more like 1-1.5", but we are constrained by what the industry offers us. (Since there really isn't a big enough market to justify creating computer optimised cores at a price competetive with what we can get from the car industry....)

In their original application, air was pushed through a heater core with a centrifugal blower, which can move a higher static pressure at a cost of more noise and lots of space demands. The axial box fans normally used in the PC world are more compact, and can be quieter, but don't make as much pressure, which limits their airflow (I use 50% of the free-air rating as a rough guide) This means that the typical 2" thick rad is actually going to offer more airflow resistance than the ideal, but it's acceptable. I wouldn't suggest going any thicker.


psychofunk 06-03-2004 01:39 AM

Hey you said and when I go there all I get are a bunch of porn pop ups. Can you paste the exact link. Thanks.

BaThMaN 06-22-2004 01:56 AM

how does this dual 120mm tri-row single pass rad w/ built in shroud sound???
(that's a 120mm fan under it)
backside of the rad shown, fronstside pic next time ;)
for sale @ ~$65... sorry only available in the philippines :)...

beerhunter 09-03-2004 07:54 AM

This is a pretty good post thanks.

IMO the only other single pass worth buying is the 2-149 off a 63-65 Ford FAIRLANE pictured below because of inlet/oulet positioning on face. a bit smaller than the 2-342 but it may find a home because of that.

This link below is a pretty cool. Not everyone carries Fedco cores so just enter the number you want and it tells all the compatable cores from different manufactures.

TNT2bluz 09-24-2005 08:18 AM

If these help...

Essentially an update of the current line of the rads. Have fun fellas. :)

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