Topic: Oil Cooling!

[wannabridin]

did i get more for the price i paid? 

[kghost]

Boy there was a big debate on oil coolers about 2 years ago or so. I've got my opinion but I'll stay out of it. Dry sump systems rule.

I just gotta know - what kind of numbers did the data present?
Can we even dissipate ENOUGH heat to make a meaningful difference?

Opinions - you know what they say about those!     
My .02
It make more sense to cool the oil prior to it's return to the tank.
For any given air flow, the greatest amount of BTUs removable from the cooler will be when the temperature difference (air temp vs. oil temp) is the greatest. Since the hotest oil should be found at the scavage pump discharge (after it has absorbed the engines heat), running it from HERE through the cooler would be most efficient...

Data wise...my cooler dropped the oil temp from 112 C to 90 C as measured with a calibrated J type thermocouple measured in the oil tank.

Yeah I agree scavage cooling would be better but I felt like most....ease of installation and cost won.

Given that your cooling post pump and prior to engine it works pretty well.

I'm in south texas and we have 100 F+ days. Generally a stock bike does ok but take a bunch of metal out of the bores with an 836 kit and bump up the compression = more heat.

I needed a cooler.

[cavebear]

Sent PM

[Phil]

RE - those super old air-cooled Hondas, MVs, etc. were running on castor oil (Castrol R30/ R40, etc.). These oils work best a very high temperatures and no way could the old mineral oils protect those high-revving and very hot engines. If you were prepared to strip and clean engines after every race (which is what MV used to do), the castor oils were not beaten until the synthetics had arrived. By the time they were perfected, water-cooled/ oil-cooled engines had arrived. MV would never say which oil they used. They used to be sponsored by Elf but no-believed they used it! My guess it was Castrol R30! Look at pictures of those MV engines and they were horribly stained by castor oil!

[turboguzzi]

OK,OK guys, im convinced.

just dont want to add more weight than needed so in typical TG style, going to design my own and cast it. will tell you how it works out,

TG

[bwaller]

OK,OK guys, im convinced.

just dont want to add more weight than needed so in typical TG style, going to design my own and cast it. will tell you how it works out,

TG

Well if that's the case TG it better be something special, and mounted where no-one has mounted one before. 

[spiritof67]

Getting back to the original thread, the SOHC4 was designed, as were most engines of the 70's, for a certain kind of riding. That didn't include a Friday night traffic jam on the Cross-Bronx Expressway two up in 90 degree weather in July, believe me. One of the few accessories I ever added to my CB750 that helped it was (bless them) a Lockhart oil cooler, which I immediately updated to the thermostatic model as soon as it came out. I could get on a CB750 and tell you it had been ridden hot in 30 seconds as long as it didn't have a cooler installed back then.

Bear in mind the top-of-the-line motorcycle oil was Castrol 20w-50 at the time. No synthetics. And you couldn't use "viscosity enhancers", i.e. STP, because the SOHC was a wet clutch bike and it'd never stop slipping if you used that stuff.

My '70 SOHC was a whole new motorcycle after the Lockhart. And the next best thing was the spin-on oil filter adapter. I used to change oil that looked almost as golden as what I poured in from the can (oil came in metal and then reinforced paper cans) after the spin on. And the spin-on had about twice the filter area of the standard Honda toy filter which, to its credit, was more than any other standard bike of its day offered. Today I'd like to try the same combination with a heavier oil pressure relief spring; probably the ultimate combination for the street and/or sporting riding.

But I've seen as many high-mileage SOHC's that had no oil cooler and the standard oil filter. Honda made a relly bullet/idiot proof SOHC, no?
And just to be complete: my SOHC started out with a Bill Bowman deep finned oil pan, so I already had the state of the art in SOHC oil cooling BEFORE I added the cooler.

[wannabridin]

Care to elaborate on the heavier oil pressure relief spring?  I've heard of it, but I'm not too knowledgeable on the subject...  Thanks!

[iomtt9]

 I will go with Spirit of 67 on this, my 500/4 which  i raced in the 1981 MGP, did all the practice, the 4 lap newcomers race ,and the 6 lap (226 miles) Senior race all on Duckhams 20/50 with no oil cooler. I also raced this bike another 3 times at the MGP, plus short circuit racing at the time. Later on Duckhams went on to be known as Duckhams Formula Q, for all the older readers who may remember this. So in 1986 this bike was put to bed till 2005 when in early 2005 i decided to get it out the garage, strip the engine, put it back together and go Classic Racing. The engine was perfect and started right away. With new oils available i went for Castrol semi synthetic race oil.  The bike ran great all in my first season back till the last meeting when a big end went.
I think i may have been very lucky with the engine, but i still race it today with out a cooler on a bit like TG.
Col

[azuredesign]

Anybody know the drain plug thread size and pitch? I want to order one of the Daytona oil temp gauges, and the sending unit is built into a drain plug replacement.
http://shindypro.com/catalog/each_q_ptype.key23.html

Thanks for any help!

[Gearheadgreg]

Looking at the pics from Gstarindustries, looks like the same B&M cooler i run on one of my bikes, brought my oil temp down from 220 to 195, also helped eliminate some detonation problems i was having under full boost on a Hot summer day, my 92 911 C2 Carrera Air cooled Oil cooled flat six was dependent on oil for cooling, 3 gallons of oil and a large oil cooler up in the front fender with a 2 speed thermo controlled fan,My view is that if your pushing it to the limit on a non stock bike sheeet happens, if i were drag racing only, i would not consider a cooler.,just my 02 cents.  

[Retro Rocket]

For me it comes down to where you live.  I live where the temp is  between 60 and 120 degrees Fahrenheit and it only gets down to 60 for a few weeks, all summer riding is around 90 degrees+ , so i consider it a little insurance to use an oil cooler....

Mick

[OneWheelDrive]

Question:  The 500 motor I bought had an adapter plate for a remote oil cooler, but the inlet/outlet was plugged with rubber caps.  Should I find the correct metal caps for the threads?  Omit the adapter entirely (do I need a shorter filter bolt)? Find a cooler and rig it up?

[Bill/BentON Racing]

Anybody know the drain plug thread size and pitch? I want to order one of the Daytona oil temp gauges, and the sending unit is built into a drain plug replacement.
http://shindypro.com/catalog/each_q_ptype.key23.html

Thanks for any help!

If I recall correctly,12x1.5mm.

[nokrome]

Anybody know the drain plug thread size and pitch? I want to order one of the Daytona oil temp gauges, and the sending unit is built into a drain plug replacement.
http://shindypro.com/catalog/each_q_ptype.key23.html

Thanks for any help!

  whats the price on that unit? looks interesting

[azuredesign]

Anybody know the drain plug thread size and pitch? I want to order one of the Daytona oil temp gauges, and the sending unit is built into a drain plug replacement.
http://shindypro.com/catalog/each_q_ptype.key23.html

Thanks for any help!

If I recall correctly,12x1.5mm.

Thanks Bill, that's the size that is included with the unit!

[azuredesign]

Anybody know the drain plug thread size and pitch? I want to order one of the Daytona oil temp gauges, and the sending unit is built into a drain plug replacement.
http://shindypro.com/catalog/each_q_ptype.key23.html

Thanks for any help!

  whats the price on that unit? looks interesting

I think around $110. plus shipping. Dennis Kirk sells them. I was also looking at the Jagg thermostat and shut off valves, however the inlet and out connections are simple barbs and not the AN connectors I've purchased for the rest of the unit. I asked mrieck about mixing them, and he hasn't written back, so I guess its not a good idea. At least with the temp gauge, I can see if it makes any sense to shroud the cooler on cool days to keep the temp consistant. What's the consensus on a safe range for oil temp? 180-190f?

[azuredesign]

Here's the Jagg link:
http://www.setrabusa.com/jagg/pages/by-pass.htm