Dual oil coolers

[notarheli]

FLHTCI 2006
Currently have the HD horizontal cooler installed and will add the Jagg 10 row vertical cooler.  What's the open on oil flow....horizontal to vertical or vertical to horizontal?  And, why (one's logic).

[IBARider]

It all depends on how you want to dice and slice your hoses.  otherwise there is no difference that I can tell.  Each cooler is going to have whatever temp drop it has regardless of where in the system.  Kinda like wiring in series... does it matter where you start......

[iclick]

FLHTCI 2006
Currently have the HD horizontal cooler installed and will add the Jagg 10 row vertical cooler.  What's the open on oil flow....horizontal to vertical or vertical to horizontal?  And, why (one's logic).

Jagg recommended that I not do this since the drag on the oil flow would tax the pump.  They had everything to gain by talking me into it, so I took the advise as gospel.

[djl]

Don't think it matters but adapter to vertical, vertical to horizontal, horizontal to adapter works for me; both are Jagg.

[barny7655]

I do agree with Jagg, but if you have the Jagg adapter with thermostat that opens when oil is hot and you use the right viscosity oil i cant see the drop in pressure with the use of two , or a restriction in flow, may be some one else has done this ,one can check both, by removing one cooler and checking pressures, interesting topic, it would be like having one cooler but twice the size, it would look good one each side though, this is only my thoughts , with temps down here in Victoria, Australia , we have had over two weeks of  over 40 C  highest been 44C  convert that to F , and yet a not a lot of us use coolers ,i have one on mine ,so in all of that id run one if the temps are not so hot all yr round, Jagg make both products ? and there advice seems right ,may be some thing in there thinking , to do with after market oil pumps, been used as well, as cam plates, Baisly springs etc, putting increased oil pressure on the system,and having a cooler restricting it to cool the oil , good thread ,Barny

[HDDOC]

IIRC, Don from Deweys Heads ran to coolers in series. Hope he hopps in. Thinking of doing this myself.   Doc

[moose]

I run two on my 02 fatboy for the last 25,000 miles with no problems what so ever.

[HD/Wrench]

You can buy a small cooler for a transmission along with the thermostat from Summit or Jegs and make your own brackets and save a ton of money. I have done several for customers that wanted twin oil coolers.  Even did one with a small fan for one customer???  it really worked well, Bagger with a trailer pulling the mountians. More than one way to get the job done.

[ICANTD55]

FWIW Woods has been doing this with two virtical coolers.

http://www.woodcarbs.com/oil_coolers.htm

[HD/Wrench]

Thats correct I have had customer tell me about the UG/ woods kit they bought that needed 3.37 gearing twin oil coolers to run correctly. Those kits tended to have  CCP  in the 225-235 range. 

[iclick]

I do agree with Jagg, but if you have the Jagg adapter with thermostat that opens when oil is hot and you use the right viscosity oil i cant see the drop in pressure with the use of two , or a restriction in flow....

I have the HD with thermostat now, which works very well, and the Jagg rep said that these are more restrictive than Jagg at the filter-adapter/t'stat.  BTW Jagg no longer makes HD coolers.  I would still like to do it but wouldn't if it taxed the pump in any way, and I'm not sure how you would know.  Adding a small vertical Jagg to my existing cooler in series would be a simple job, maybe 15 minutes.

[apes]

I suspect that there is always the option to run a Jagg in tandem with an adapter / cooler that runs the oil through the crash bar, I suspect you wouldn't have the back pressure of 2 Jaggs and it might fit on the bike better...

[HDDOC]

Dave Brode gave me his info on the engine guard cooler and it worked out great never saw temps higher than 220*. I have a 110" now and am in the process of trying to work it into the bike.  Doc

[maintainin]

Engine guard oil cooler. Very interesting. Is there a set of instructions somewhere on how to perform this?

[Ed Y]

Ken R, who posts on here, runs 2 JAGG coolers on his 02 EG, mounted on each of the front downtubes.

[Ken R]

As Ed stated, I have been running two Jagg vertical coolers on my Ultra for about 2 years.  I only removed them this winter; not because of any problems but instead because I wanted to re-install my lower fairings.  They simply won't work on touring bikes with lower fairings. 

I ran my coolers in parallel; not in series.  In series, the restriction and resultant static pressure would be double a single cooler. 

In parallel, the restriction would be half that of a single cooler.  Of course, in parallel the oil would spend more time in the coolers.  I see that as a good thing (or at least equal to the cooling effect in series).  More time in the coolers, the more cooling effect without the penalty of excessive static pressure.

The result?  There was huge cooling effect!  Much more than with my single horizontal HD cooler that I'm now running.  The most evident effect was the quick cooling of the oil when finally freed from traffic jams or long stoplights. 

I did a several-hour study with a two-input digital thermometer under all kinds of riding conditions with an ambient temperature of 103 degrees.  Published it on the old HTT forum.  I guess it's gone now.  But it was very telling (the effect of oil coolers on our motorcycles)

Ken

 

[Faast Ed]

Jagg recommended that I not do this since the drag on the oil flow would tax the pump.  They had everything to gain by talking me into it, so I took the advise as gospel.

Sounded logical until I read this one:

In parallel, the restriction would be half that of a single cooler.  Of course, in parallel the oil would spend more time in the coolers.  I see that as a good thing (or at least equal to the cooling effect in series).  More time in the coolers, the more cooling effect without the penalty of excessive static pressure.

The benefit of HTT is priceless! 

[PosseRider]

Engine guard oil cooler. Very interesting. Is there a set of instructions somewhere on how to perform this?

I have the instructions here somewhere. PM me your email & I will find them & send them to you. I have used this now for over 40,000 miles & it works good. I did put on the Jagg offset oil filter mount with thermostat. Got it off ebay for $110. and around $15 for hoses & fittings.  No more coolers hanging around!!!     

[HDDOC]

Had a hole tread on the engine guard cooler on the old site, but can not find it now.  Doc

[HDDOC]

Ken R  would you happen to have a drawing of how you plumbed the duel coolers.  Thanks Doc

[iclick]

Jagg recommended that I not do this since the drag on the oil flow would tax the pump.  They had everything to gain by talking me into it, so I took the advise as gospel.

Sounded logical until I read this one:

In parallel, the restriction would be half that of a single cooler.  Of course, in parallel the oil would spend more time in the coolers.  I see that as a good thing (or at least equal to the cooling effect in series).  More time in the coolers, the more cooling effect without the penalty of excessive static pressure.

The benefit of HTT is priceless! 

Jagg also told me a parallel arrangement wasn't good because the oil would flow mostly through the cooler of least resistance.  They weren't big on the dual-cooler concept in general, especially with one cooler being an HD Premium.  Even with two Jaggs they said it would be overkill. 

[Ken R]

The parallel cooler concept worked just fine.  There may have been a difference in resistance between the two, but the combined resistance is still well under half-that of a single cooler.  I took temperature drops measurements across each cooler and there was no difference (to the tenth of a degree using a Fluke dual-input digital thermometer instrument with "grain of wheat" sensors).  So if one cooler flowed less oil than the other, it wasn't significant. 

Consider if one cooler was totally restricted.  The alledged downside is that all of the oil would flow through the other cooler. That is an illogical hypothetical worst case senario; . . . .. and the outcome is the same as if you had just one cooler.   So there really is no downside. 

Ken

Jagg recommended that I not do this since the drag on the oil flow would tax the pump.  They had everything to gain by talking me into it, so I took the advise as gospel.

Sounded logical until I read this one:

In parallel, the restriction would be half that of a single cooler.  Of course, in parallel the oil would spend more time in the coolers.  I see that as a good thing (or at least equal to the cooling effect in series).  More time in the coolers, the more cooling effect without the penalty of excessive static pressure.

The benefit of HTT is priceless! 

Jagg also told me a parallel arrangement wasn't good because the oil would flow mostly through the cooler of least resistance.  They weren't big on the dual-cooler concept in general, especially with one cooler being an HD Premium.  Even with two Jaggs they said it would be overkill. 

[ederdelyi]

FWIW, just about every hipo application I've seen with regard to multiple coolers uses the parallel configuration. Several benefits, IMO. Series is more common in some industrial applications and for tranny coolers or engine oil coolers used on water cooled vehicles. They use the aux cooler in series with the built in cooler on the vehicles radiator ... keeps it from running too cold without the use of an additional thermostat or bypass valve.

[PanHeadRed]

> Jagg vertical coolers on my Ultra   They simply won't work on touring bikes with lower fairings.<

I know of one that does. 

[Ken R]

> Jagg vertical coolers on my Ultra   They simply won't work on touring bikes with lower fairings.<

I know of one that does. 

Man, I'd like to see how.  I've been considering selling my vertical coolers and adapter in favor of the HD Deluxe cooler I now have installed. 

I tried just about everything to make the vertical coolers clear the lower fairings.  They can be angled to give clearance, but 10 minutes on the road and they angle themselves back against the fairings.   I even tried tying them in the angled position; only to discover that the front fender would jam against my nylon tie-wrap that I used to hold the coolers at an angle when I applied the brakes.   So, I finally gave up and took the vertical coolers off.

Ken