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Post by unabashedpraise on Apr 30, 2008 9:30:30 GMT -5
I know the subject has been touched on a few times... However, I still have questions.
I was wondering if the size of the oil cooler matters in repect to what bike they were intended for. I have seen oil coolers from 50cc bikes all the way up. Should a cooler of the approximate size be installed, i.e. 650cc, versus a cooler from a bike with 3 times the cc's? Will a small cooler had inadequate efficiency versus a larger one? Will the SR's oil pressure handle a large cooler?
From what I understand the cooler doesn't matter as long as the oil lines match up and/or are changed to fit. Is this correct?
I would love to get the Honda XR400 cooler and it looks great, but the cheap-o's and hand me downs from eBay are much more affordable. I know I don't need something the size of a case of beer, but I also don't want to get something the size of a matchbook either.
Thanks-
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Post by stevec5000 on Apr 30, 2008 10:10:54 GMT -5
Obviously the cooler should be sized to the engine and to a lesser extent to the climate where you intend to drive it. Here in Arizona I have to use a cooler when driving at high speed on the freeway when it's around 140 F out there. My XS1100 didn't have any oil pressure under those conditions so I tired a stock oil cooler but it didn't provide enough cooling so I went to a larger one for a car off a Mitsubishi Starion 2.6 L 4 cyl. Then I used the stock 1100 cooler on my 750 Seca in place of the smaller Seca cooler. I haven't tried a cooler on the SR500 yet because I didn't want to cut into the oil line but it does get pretty hot so I've been thinking about it. They have a nice looking one at the local Harley shop that's just a U shaped piece of tubing with fins on it that should work. It's probably too small for a Harley but should be fine on the SR.
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Post by unabashedpraise on Apr 30, 2008 10:31:59 GMT -5
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Post by stevec5000 on Apr 30, 2008 10:44:56 GMT -5
I don't think any of them will bolt on directly without modification. You will have to come up with a suitable mounting arrangement then modify the oil line to fit the cooler.
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Post by caferacercarl on May 1, 2008 0:05:37 GMT -5
Be carefull, shell bearing engines are low volume/high pressure, SR engines are full roller bearing and low pressure/high volume, so, if your oil pressure backs up because your cooler core is to restrictive your front sprocket oil seal will pop out and spew all your oil over the rear tyre in about 3 seconds....... [ or if the oil used is too thick for the ambient temp] as usual, here to help. Carl. [just buy a lockhart uni cooler]
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Post by StewRoss on May 1, 2008 2:07:30 GMT -5
I have a Lockhart (...that I have yet to fit to the DCM :  ...I like the Honda XR 'horseshoe' ones too...easy to hide away.  ...not fitted it properly yet...still agonising over the position! SR  |
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Post by aero on May 1, 2008 5:04:39 GMT -5
Right where it will get trashed by anything thrown off the front wheel?  Or are you having a belly pan? Seems DCMs are getting popualr, that's the 3rd one I know of being built! |
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Post by StewRoss on May 1, 2008 6:55:29 GMT -5
Hi Aero, Yes I have removed it from there...Ducatis have them there but they do get trashed. It seemed convenient for a while then I changed my mind. This one is more of a re-build. I am changing it a bit...I know of another couple now as well...all in the UK. I came across two in Japan when I was there as well...one that was a copy built in Japan. SR |
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Post by unabashedpraise on May 1, 2008 10:25:48 GMT -5
Be carefull, shell bearing engines are low volume/high pressure, SR engines are full roller bearing and low pressure/high volume, so, if your oil pressure backs up because your cooler core is to restrictive your front sprocket oil seal will pop out and spew all your oil over the rear tyre in about 3 seconds....... [ or if the oil used is too thick for the ambient temp] as usual, here to help. Carl. [just buy a lockhart uni cooler] How do I know if the coolers are designed for low pressure versus high pressure? |
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Post by caferacercarl on May 4, 2008 2:22:57 GMT -5
just by the type of engine its originally off, most engines [bar 1100 kat,Z1000] are shell motors ,but most singles especially if they have roller bearing cam are ball bearing engines. now that the lockardt cooler has been around for some 3 decades you can get them at the wreckers for a very good price, or, an aftermarket auto trans cooler for a car I have seen work well at very cheap price
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Post by aero on May 4, 2008 6:16:19 GMT -5
I'm guessing its to do with flow rate, if you fit a restrictive cooler you will get problems.
I had intended to machine fins into a plain ally bar and bore a hole through it, threaded for standard pipe fittings. Basically it would a straight peice of tube. In the UK I doubt you'd need more then that. I'd need a thermostat to by pass it though, not sure where I'd get one of those yet.
Velocette put a strip of metal on the side of an oil tank and that reduced the oil temp by 7 degrees C
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Post by StewRoss on May 4, 2008 16:56:12 GMT -5
Hi Aero, I was going to make one of those myself...not so sure now...I like the curved XR type at the moment...out of the way and it would probably work well enough...decisions, decisions... SR  |
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Post by aero on May 5, 2008 4:03:39 GMT -5
Tell me about it! You need to shut yourself away in the shed and just get on with making stuff. Looking at what other people have done on the net is the biggest hold up on my project I think!
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Post by StewRoss on May 5, 2008 5:08:46 GMT -5
Heh, heh...but interesting... SR  |
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Post by caferacercarl on May 8, 2008 3:10:10 GMT -5
Andy used an XR400 one on the race bike, in the XR position, I have fitted ones turned up out of straight bar and using air line barb ends, they are great, do it!!!
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...I like the Honda XR 'horseshoe' ones too...easy to hide away.
