TheSamba.com :: View topic

Sun Jul 05, 2020 9:57 am

Hi
I'm planing to add a remote oil cooler to the 1600cc Ghia 71' and wondered which oil cooler design is prefered
1. the plate design? e.g. 96 plate

2. the pass design? e.g. 16 pass

or you have some other suggestion?

thanks for your help
Avi

Sun Jul 05, 2020 10:57 am

What are your oil temps? A 1600 should not need an auxillary oil cooler unless maybe your road racing.

Sun Jul 05, 2020 11:42 am

If your 1971 has doghouse cooling as 1971 USA ones had, I'd stick with that.

My pre-doghouse 1835cc engine has used an 8-pass cooler since back in 1976, in Arizona.

Sun Jul 05, 2020 12:18 pm

Neither of the ones you posted.

https://www.thesamba.com/vw/forum/viewtopic.php?p=9398746&highlight=#9398746

Sun Jul 05, 2020 10:32 pm

vwracerdave wrote: What are your oil temps? A 1600 should not need an auxillary oil cooler unless maybe your road racing.

I'm planing to add supercharger so the engine will generate more heat, right?
I dont know what will be the temp with the charger

so I would like to understand the advantage and disadvantage of these designs?
I recall that in the past I had sport bike with the plate design (R750 92'), so is it better for heat dissipation? or the tube design?

thanks
Avi

Mon Jul 06, 2020 5:46 am

Cusser wrote:
My pre-doghouse 1835cc engine has used an 8-pass cooler since back in 1976, in Arizona.

I read somewhere that's not the best location as it sucks in already heated air. I had one too back in the 'pre-doghouse' days too. My stock doghouse works great and I haven't seen a need to supplement it.

Mon Jul 06, 2020 7:34 am

runamoc wrote: Cusser wrote:
My pre-doghouse 1835cc engine has used an 8-pass cooler since back in 1976, in Arizona.

I read somewhere that's not the best location as it sucks in already heated air. I had one too back in the 'pre-doghouse' days too. My stock doghouse works great and I haven't seen a need to supplement it.

Back in the 1970s, when doghouse stuff was expensive and dealer only, this setup remedied the #3 and #4 side getting way hotter than the right side. Yes, I've used such setup since 1976, and also use the similarly-dreaded 1835cc engine, and had dealer-installed AC on my 1970 as well, plus Arizona desert. I use a Mazi2 pump/filter and lid standoffs.

I do not recommend this setup with today's technology, but 44 years with it and I'm OK with it.

Mon Jul 06, 2020 10:23 am

I killed a 100 hp 1680 engine using that set up back in ´90. (With a closed lid) What has kept your engine alive is the deck lid stand offs.

The mesh or Setrab style cooler is the most efficient. but if the cooler has a certain size in relation to the need I do not think it matters that much

Mon Jul 06, 2020 10:28 am

thanks for everyone's for replaying

so what is the differences between the coolers approach?
the first one is lots of plates in parallel and the second one is spiral long tube?

Mon Jul 06, 2020 11:40 am

Quote: what is the differences between the coolers approach?
More exposed surface area = greater cooling efficiency.

Mon Jul 06, 2020 11:58 am

Given they both have many thin fins which are close together the coolers are probably about the same if they are the same total surface area and you flow the same amount of oil and air through them.

If they are exposed to high oil pressures or stone impact, the tubing is going to be more robust in the tube based coolers. The plates are welded together , so are more vulnerable to stones. But even my EMPI plate style cooler is rated to 500 psi and sits in a scoop under my bus. I have only cracked the aluminium on one with a good heave on a pipe connection..

Mon Jul 06, 2020 1:54 pm

thanks a lot
I'll consider that in my searching

Mon Jul 06, 2020 6:08 pm

How about considering a different method- adapt a Type 4 oil cooler to your (hopefully) dog house fan shroud. It has 2 more rows of cooling fins than a Type 1, and is MUCH easier to install than those separate coolers. You don't need to run any additional feed and return hoses, since the Type 4 attaches to the same intermediate adapter as the Type 1 DH cooler. I realize that the Type 4 cooler has nowhere near the cooling benefit of those separate ones, but it would be your easiest start. Gallery photo; Type 1 on top, Type 4 on bottom.

Mon Jul 06, 2020 8:00 pm

I’ve been eyeing this one. I’m gonna mock up some cardboard and see if it’ll fit somewhere on my 72 https://www.summitracing.com/parts/der-15660

Wed Jul 08, 2020 7:37 pm

ok, absolutely no room for that one. Going with a 96 plate under the trans with no fan. I forgot how little room there is with IRS.

Sat Jul 11, 2020 11:47 am

I've measured min of 4" (in some area even more) above the gear, so I plan to place this on
https://www.ebay.com/itm/Derale-15830-6-Pass-Econo...2749.l2649

actually there are several lengths for this cooler, the total thickness is 3 3/4

Sat Jul 11, 2020 12:13 pm

I would like to consult with the exert regarding the external oil cooler installation, what will be the prefered setup?

1. oil pump with in/outlet

2. then oil filter bracket

3. then thermostat

4. and then the cooler

2+3. or to add the sandwich thermostat with the barckert instead and then the cooler?

or some other prefered setup?

Appreciate your comments
Avi

Sat Jul 11, 2020 12:36 pm

or to use this setup instead?

Sat Jul 11, 2020 12:38 pm

I like a quality cooler like the Setrab. I assumed i'd need it for my 2180 but oil temps are usually 210*F and never go over 230*F, so I never installed it.

Sat Jul 11, 2020 3:00 pm

Nice looking piston 8)

Glenn wrote: