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Thread: radiator temps...

  1. #11
    Senior Member TRX_hooty's Avatar
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    It wouldn't hurt to try engine ice or distilled water with Redline water wetter. It could possibly lower you engine temps. As far I know the inline heat diffusers don't work.
    The coolant doesn't have enough time to cool when passing through at the rate of flow IMO.

    Someone else will have to answer what is the max water temp range for the 250R.
    Timothy



  2. #12
    Senior Member Burns350R's Avatar
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    200 should be the hottest you ever run it at. 180-190 is ideal. 220 is runable but not good.. 220+ is no no no no no
    (MX) TRX 363R 02- Laeger Narrow Frame/CR500 Link, Custom Axis Shocks, Roll Design +4, LSR +4 axle, BDT Sphynx 363 +4 Stroker, 40.5 A/S carb,Rath Signature Series,CCP

    (XC) TRX 363R 86- Stock frame(gusseted), LSR swinger, LSR +2 Arms, Axis rear, 450R custom front shocks, +4 LSR Axle, BDT Sphynx 363 +4 Stroker, 38 A/S carb, Rath Signature Series

    (MX) DS 450X MX 09- Custom Axis Shocks, Dominator 2, Rath Monster pegs, 13.6:1 piston, BCS ported/decked/epoxied, Dual exhaust cams,

  3. #13
    Supporting Vendor acecarlos's Avatar
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    Quote Originally Posted by TRX_hooty19596
    It wouldn't hurt to try engine ice or distilled water with Redline water wetter. It could possibly lower you engine temps. As far I know the inline heat diffusers don't work.
    The coolant doesn't have enough time to cool when passing through at the rate of flow IMO.

    Someone else will have to answer what is the max water temp range for the 250R.
    X2.....Distilled water Is your best coolant as far as keeping temps down...

    Quote Originally Posted by Burns350R View Post
    200 should be the hottest you ever run it at. 180-190 is ideal. 220 is runable but not good.. 220+ is no no no no no
    2x....Yup, 220F and above Is a disaster waiting to happen....

    Quote Originally Posted by sky View Post
    Im seeing 200+ on some of my outings. I have a 363 with a trx5 pipe. Got around 210-215 out in Lil Sahara OK but it was 115 degrees ambient temp. Scarring the hell out of me! Let it cool down to 180 on rest stops. What is the extreme danger zone on the high end? Does anyone know if the inline heat diffusers really make a difference? I was thinking of trying some engine ice to see if that lowers the temp compared to 50/50 rad fluid im running now.
    BB tend to run warm in the Sand. Your BDTM 363 ProX will run 180F to 190F normally, and may creap up over 200F in extreme hot weather or extended riding periods. An oversized radiator, straight fins, and pure Distilled Water will help keep the temps down George.

    Carlos
    BDT MOTORSPORTS 909-466-9152 M-F 9:00 AM to 6 PM, Saturday 10 AM to 4:30 PM. Visit our Web Site at WWW.BDTMOTORSPORTS.COM or email: BDTMOTORSPORTS@YAHOO.COM 'SIMPLY THE BEST' BDT MOTORSPORTS'

  4. #14
    Senior Member D Bergstrom's Avatar
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    Quote Originally Posted by sky View Post
    What is the extreme danger zone on the high end?
    I would not be worried with temps in the 200 to 215 range. Figure my truck runs at 200 all the time (195 thermostat) and the 250R is just an internal combustion engine just like the truck, so 200-215 should be fine. Sure, the cooler the better, but I don't feel around 200 would hurt anything. I used to have a Honda CBR600F4I street bike that had a digital temp gauge on it. The fan wouldn't even kick on until 218, and it would get up to around 225 just sitting at stop lights. Never hurt anything, and I figure Honda must think that is safe or they would lower the fan kick on temp. Never checked, but I have heard that the fan on a TRX450R doesn't kick on till around 215 also, and on hot days I see that fan running quite a bit. Never any damage in all the years I have been racing or riding my 450R's. The 450R's do have a temp light though, and if that comes on, I shut the quad off. I guess if I had an absolute high temp, it would probably be around 225 and I would shut the quad off to let it cool. Then again, I don't have a temp gauge on anything, but my 450R's and 700XX's have a light, so I just go by that. My 250R has no light, so I probably wouldn't shut if off until it was to late!

    Doug
    Last edited by D Bergstrom; 07-23-2013 at 01:22 PM.
    2004 TRX450R, 2008 TRX700XX
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  5. #15
    Senior Member Burns350R's Avatar
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    I have ran at 220 for extended time without issue, but i have also locked them up at 230. So its deffinatly danger zone. 210 is okay but not good IMHO.
    (MX) TRX 363R 02- Laeger Narrow Frame/CR500 Link, Custom Axis Shocks, Roll Design +4, LSR +4 axle, BDT Sphynx 363 +4 Stroker, 40.5 A/S carb,Rath Signature Series,CCP

    (XC) TRX 363R 86- Stock frame(gusseted), LSR swinger, LSR +2 Arms, Axis rear, 450R custom front shocks, +4 LSR Axle, BDT Sphynx 363 +4 Stroker, 38 A/S carb, Rath Signature Series

    (MX) DS 450X MX 09- Custom Axis Shocks, Dominator 2, Rath Monster pegs, 13.6:1 piston, BCS ported/decked/epoxied, Dual exhaust cams,

  6. #16
    Senior Member pantera1975's Avatar
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    I run a trail tech digital gauge and Have checked with temp gun my gauge is right on. 91 octane 330 esr motor runs 180-195 reading off the hose from the top of the head.
    1986 ATC 250R built to trail ride!! Billet,chrome completly redone everything and BDT built 330 motor
    1985 ATC 250R restoration under way. PSI Racing pipe and porting stock motor built by BDT motorsports.

  7. #17
    Senior Member Burns350R's Avatar
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    I ran a trail tech on my XC bike untill the temp sensor got so hot it blew apart. Granted the radiator was plugged clear off and i was in a 1.5hour harescramble with a stock radiator and 350cc engine...hahah.
    (MX) TRX 363R 02- Laeger Narrow Frame/CR500 Link, Custom Axis Shocks, Roll Design +4, LSR +4 axle, BDT Sphynx 363 +4 Stroker, 40.5 A/S carb,Rath Signature Series,CCP

    (XC) TRX 363R 86- Stock frame(gusseted), LSR swinger, LSR +2 Arms, Axis rear, 450R custom front shocks, +4 LSR Axle, BDT Sphynx 363 +4 Stroker, 38 A/S carb, Rath Signature Series

    (MX) DS 450X MX 09- Custom Axis Shocks, Dominator 2, Rath Monster pegs, 13.6:1 piston, BCS ported/decked/epoxied, Dual exhaust cams,

  8. #18
    Senior Member grande huevos's Avatar
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    I don't think it makes much diff if the guage is on the top or bottom hose because the temp doesnt change that much with how fast the coolant circulates, I would say only a couple degrees diff max. On my bike ported 330 with trx 5 pipe it would hit 200 within 10 min in 70* weather and I would shut her down. I switched to a Afco radiator with engine ice and I cannot break 175 regardless how hot it is outside. I never broke 170 even in the sand after an hr of continuous hard riding. If you want low temps spend the money on a good radiator, it's the best thing I ever bought for my R hands down. I have a Afco dual pass cross flow. Expensive but well worth it

  9. #19
    Senior Member dham's Avatar
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    My 330 is seeing 215 alot and no signs of problems yet. I agree that 215 is rideable but is'nt the sweet spot(most power) about 185? I'm sure some dyno guys would know best HP temperature.

  10. #20
    Supporting Vendor acecarlos's Avatar
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    Their is a 15 to 20 degree F difference from the top hose to the bottom initially as the engine remains within the radiators cooling capacity. Once the coolant reaches the radiators max ability to cool, both top and bottom hoses measure about the same as grande huevos stated....

    The highest Dyno and HP numbers and output occur with the coldest coolant and engine temperatures. A cold run on a Dyno can inflate HP numbers.

    Carlos
    BDT MOTORSPORTS 909-466-9152 M-F 9:00 AM to 6 PM, Saturday 10 AM to 4:30 PM. Visit our Web Site at WWW.BDTMOTORSPORTS.COM or email: BDTMOTORSPORTS@YAHOO.COM 'SIMPLY THE BEST' BDT MOTORSPORTS'


 

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