Is the 2-144 single pass?
 

googled and searched the forums but all i can find are the dimensions :( Anyone have a pic of this? Want to know if its single pass, and if the barbs are the facing ones or the side ones.

Thanks, James

Here's a drawing taken from the "Heater Core Cross Reference Look Up".

Thanks for the link, exactly what I was looking for.


Edit---

Anyone know where to get one of these?

have you tried your local auto-parts store? autozone, murray's, pep boys...

That is a dual pass design.

2-342 is a large single pass with the inlet/outlet on the face of the core.

I just answered a question similar to this the other day so I'm just gonna quote myself :D
BTW, in case you didn't know what that 2-144 number is, that's your heater core's Fedco number. I don't know if the GDI # will work at any other store besides autozone so maybe someone else knows.
Hope I helped.

I just bought my heatercore from LordCo. auto parts...
Just bought the core 2-148 but the place themselves used a difrent number system...
atleast they could cross refernce the Fedco number i had..
2 virtualy the same cores but $35 diffrence in price...
so when you go get one have a cople on your list...
bring a tape measure and measure it befor you buy it...
not the sizes listed are for fan area only and do not include the tanks.

are dual pass designs better than single pass designs?

Thanks.

Single pass has a lower pressure drop so more flow which equals better performance in most cases.


Unfortunately the 2-144 is 1/8 of an inch too wide for my case (would have to remove the entire 5 1/4" mounting system).
So Im just going to get the 2-342. I was just hoping for something larger as I can fit 3 120mms easy. And because of how I am going to mount the new HC and how I mounted my old one Im going to have 3 120mm blowholes except one wont be over the HC =\

The autopart link doesn't work any more give me an error whenever i enter a Fedco 2-342. Anyone know the GDI # for the Fedco 2-342?

I just bought one the other day at pepboys, the number is 399090 from a 72 chevy pickup (c10) with ac.

I'd love to see some well performed real-world testing showing this to be the case.

According to my calcs, the effect of a 120.2 dual pass HC on a WC loop that uses either of the high-impedence design water blocks (fins like LRWW or cups like Cascade) is negligable.
Eg: At 6.32 LPM I get a head of 0.116 mH20, versus 1.5mH20 for the block and 0.106 mH20 for the tubing.

Therefor, even if going to a zero resistance HC, the increase in flow is likely to be less than 1 LPM, and hence the impact to the block's performance is going to be less than 0.01 C/W.

Its going to be a different story on rigs that have high flow rates, but a 6 LPM or less its SFA.

holy thread resurection batman.

Eh, yeah single pass in theory is better for flow. Real world results? heck if I know. Ive never bought a single and double pass HC and seen the difference between the two. In the majority of setups Ive looked at doing single pass is easier to route anyways, but thats just me.