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Post by flames on Jul 18, 2013 19:59:54 GMT 1
remember seeing rdlclazy say that his lc ran at about 1/3 of the way up on the temp guage when he fitted his hi flow impeller.
mine runs about the same (no thermostat fitted),whilst ive been running in.but today i took her out,and sat at between 70-80mph for few miles and the guage went up to halfway which is where it used to sit with standard impeller fitted.does anyone else get this on hot days running the hi flow impeller?or do they usually stay at around 1/3 up even if a hot day? reason i ask,is i think my bike is running a little lean,which im going to be getting on the case with this weekend,i know this can cause an engine to run hot,and am thinking this temp rise coincides with the ruff/weak area.maybe i can use temp to help show if im working in the right direction,and when im getting close to where i need to be.
cheers
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Post by Deleted on Jul 18, 2013 21:08:37 GMT 1
Went out on mine last Friday for first time since accident and mine had gone up to just below half with all the beautiful weather we are having at the mo. mine has a 71 degree thermostat fitted though where yours has none
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Post by wallcraft on Jul 18, 2013 22:23:54 GMT 1
Just fitted high flow impeller, rode it tonight hard temp sat at just below halfway, this is with a 50 degree stat.
Not sure if its an improvement over standard, will try again in normal weather. 4LO bike. Thinking about a bigger rad!!
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Post by Deleted on Jul 18, 2013 22:41:24 GMT 1
Think it would be running hotter without the high gain impeller
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Post by wallcraft on Jul 18, 2013 22:52:33 GMT 1
Rd lazy, was the boost bottle no gain for you?
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Post by Deleted on Jul 18, 2013 23:06:52 GMT 1
No it did nothing when it was on dyno
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Post by marsbar350 on Jul 18, 2013 23:42:38 GMT 1
got a standard yam impeller in mine.it doesnt reach halfway even in this barmy weather  lc rad miles bigger than needed.just look at a pv one! |
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Post by Deleted on Jul 19, 2013 0:08:14 GMT 1
Andy yours will never get hot as you ride like a girl. But agree Lc radiator is a lot bigger than a power valve one
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Post by marsbar350 on Jul 19, 2013 0:11:43 GMT 1
all i will say mick is boost bottle and aftermarket coils expensive replacements that do fook all.dyno proven  |
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Post by Deleted on Jul 19, 2013 0:21:54 GMT 1
Banshee coils do work
Still doesn't get away from fact you ride like girl which group are you going in on Trackdays at cadwell?
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Post by flames on Jul 19, 2013 8:07:51 GMT 1
lmao @ you 2.mine is 4lo with no thermostat,so would think my temp shd b about 1/3 of the way,so prob running hot due to lean condition.this helps narrow it down to being lean in the mid to high range.thanks for your help.sorry for theinteruption,you may now carry on with the bickering.lol
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Post by midlifecrisisrd on Jul 19, 2013 8:54:30 GMT 1
Hi flow impeller is a double edged sword I think. I have one in my ypvs but also fitted a larger rad ( LC one is big already )
The hot weather we are having will not help as the higher the difference in rad and air temperature there is the more efficient it will be.
If the impeller moves the water round faster then it will spend less time in the radiator so will transfer less heat especially when the air temp is high so would need a radiator that was over efficient in the first place to be a benefit.
Some would argue that it takes the heat out the engine faster but others would say as it spent less time in the engine it will absorb less heat.
I only fitted both as I remember back in the day if you got stuck in traffic my old bike would go into the red on a hot day so fitted the hi flow and the bigger rad to be safe with the higher power output.
Think an Lc rad would be enough unless serious cc and power but would think a stat would be needed to stop over cooling in cold weather.
Impellar may be a bit of a gimmick as think most came from the two stroke shop who also promoted the billet valves as a must have when if you are having a decent tune would need matched anyway so no gain over the standard ones.
Steve
PS mine runs around the 1/3 normally but has been sitting just under half in this weather but briefly rises a tad over half if I hold high revs at low speed before returning back again.
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Post by flames on Jul 19, 2013 9:03:30 GMT 1
nice one thankyou.i had no reason for going with the hi flow impeller.original had worn the shaft,n thought if im going for new one,i will try it out.my bike spends most of its life in bits,so prob wont get out much on cold days.and what with the limited tyre choice,i prefer hot roads to aid grip.will get the lean running sorted out and see how it goes from there.just thought i could use the higher temp to help narrow it down when im getting close to correct settings.whilst its getting warm at 75-80,i know not to crack the ton just yet.me and 100mph seem to have a bit of an issue lately.and its always the pistons that loose out.dont intend making the same mistake this time.
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Post by Deleted on Jul 19, 2013 11:34:29 GMT 1
When I did a trackday at cadwell last October with the high gain impeller but no thermostat, I couldn't get the bike warm enough and had to tape just less than half the radiator up, as was scared of cold seizing it
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Post by jessy03 on Jul 20, 2013 6:52:57 GMT 1
I went for ride last weekend - just steady it was 72 degrees when ridding hard it went to 82-4 degrees, I also have the high flow impeller which I think may be a gimmick
What is the ideal running temperature, I assume its around 73 as that's when the thermostat opens??.
Jess
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kevbn2
L plate rider.
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Post by kevbn2 on Jul 20, 2013 15:42:47 GMT 1
I had the same issues so fitted billet impeller but it did not really make a difference so i have now fitted 40mm core billet radiator and it now runs at a third of the way up gauge instead of 2 thirds and it does not move in any condition and looks great too!! but now got to fabricate a new bracket for the rad guard but thats no probs Attachment Deleted |
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Post by wallcraft on Jul 20, 2013 16:54:46 GMT 1
We're did you get the 40mm core rad from? Do they do one for a 4LO? Cheers.
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Post by bare on Jul 20, 2013 17:30:06 GMT 1
I went for ride last weekend - just steady it was 72 degrees when ridding hard it went to 82-4 degrees, I also have the high flow impeller which I think may be a gimmick What is the ideal running temperature, I assume its around 73 as that's when the thermostat opens??. Jess Ideal temp is 50/55 C.. Yep 80 C is overheat. Fit an appropriate Thermostat.. FIRST. |
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Post by Taylormade on Jul 20, 2013 19:20:19 GMT 1
I have a standard impeller in my 4LO and no stat....
In this hot whether while plodding about temp climes to about 1/4 up the gauge..,,. Soon as you thrash it, she cools back down again.
Get stuck in traffic and is very quickly up to 1/2 way on temp gauge...... Summer riding sits on average around a 1/3........ Anything below 12 degrees outside and she don't get warm at all!
But this seems to be normal with no stat.....
I don't see the point in fitting a stat unless you ride in winter. And I see no reason to fit a fast flow impeller either?
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Post by Deleted on Jul 20, 2013 19:25:46 GMT 1
I put a high gain impeller onas my impeller seal and impeller went on my way to norbo's bbq last year and since original and high gain were the same price I thought I would go for high gain one, fitted stat as I wanted bike to warm up quicker
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kevbn2
L plate rider.
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Post by kevbn2 on Jul 20, 2013 20:33:23 GMT 1
Hi
Got the rad from legion motorcycles but if you google it there are a couple of suppliers not sure about 4lo though.
cheers kevin.
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Post by copper99 on Jul 22, 2013 15:16:06 GMT 1
I put a high gain impeller onas my impeller seal and impeller went on my way to norbo's bbq last year and since original and high gain were the same price I thought I would go for high gain one, fitted stat as I wanted bike to warm up quicker I did exactly the same, as my impellor and seal went the same way as well. Didnt bother with a stat but as I understand it, anywhere in the green is OK, she sits just under half way, in this weather , so I think thats OK. |
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Post by flames on Jul 22, 2013 22:13:33 GMT 1
mine sits about half way too in this weather.strange how some sit that high,and others only get 1/3 way up.even some with standard impeller.
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Post by midlifecrisisrd on Jul 22, 2013 22:45:09 GMT 1
I went for ride last weekend - just steady it was 72 degrees when ridding hard it went to 82-4 degrees, I also have the high flow impeller which I think may be a gimmick What is the ideal running temperature, I assume its around 73 as that's when the thermostat opens??. Jess Ideal temp is 50/55 C.. Yep 80 C is overheat. Fit an appropriate Thermostat.. FIRST. thats exactly what tss told me and hence why mine runs a 50 degree stat. fitted the high flow impellar as part of a cooling system upgrade with the larger rad. yes the impellar may be a bit of a gimmick but it is designed for better flow and i would rather have a new billet one than a 30 year old plastic one that the head could come off. 70 degree stat and large rad tended to make my temp see saw a bit during first few warm up miles as rad cooled faster than the stat acted so would heat up fast till the stat opened then plunge as it let the cool water round. would do about 3 cycles of this till fully heated. not good with forged pistons. steve |
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Post by jessy03 on Jul 23, 2013 7:58:06 GMT 1
Hi Steve,
Where did you get the 50 degree stat, looks like i need one.
Thanks
Jess
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Post by nikfubar on Jul 23, 2013 9:36:12 GMT 1
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Post by midlifecrisisrd on Jul 23, 2013 10:50:02 GMT 1
Hi Steve, Where did you get the 50 degree stat, looks like i need one. Thanks Jess it is the snow mobile one in mine. exactly the same other than it not having the sealing ring ( take it off the old one ) and a small by pass hole in it. part number was off the other forum so now gone, will see if i can find it. rgv one will be cheap second hand, the yam ones a bit pricey steve |
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Post by jessy03 on Jul 23, 2013 12:41:19 GMT 1
Thanks for the info, i'll get one sorted.
Jess
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Post by wallcraft on Jul 23, 2013 17:51:10 GMT 1
Here you go , snow mobile stat part no, 82M-12411-00 . Still got the yam box it came in, bought last year I think it was 30-35 quid!!
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Post by midlifecrisisrd on Jul 24, 2013 1:36:16 GMT 1
Here you go , snow mobile stat part no, 82M-12411-00 . Still got the yam box it came in, bought last year I think it was 30-35 quid!! yes that's the one steve |
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