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 Post subject: Re: radiators
PostPosted: Sun Jul 04, 2010 5:10 pm 
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Location: sacramento ca.
Took it out for a little ride today on dirt, i got my temp down to 205 to 207.

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 Post subject: Re: radiators
PostPosted: Sun Jul 04, 2010 10:39 pm 
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I blocked off the barb because I noticed that my buddy's BMS buggy doesn't use that barb. I jetted his buggy the same as mine, it ran cooler than my Joyner, and it's just as heavy. Bottom line the Joyner's getting a bigger radiator, it has never ran cool in the summer, according to the gauge. The Dune runs much cooler, and I think it's more about the amount of weight pulling hills.

Greg

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 Post subject: Re: radiators
PostPosted: Mon Jul 05, 2010 2:07 pm 
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Location: sacramento ca.
Gman, what temps are you running with your bbk. Thanks Shannon

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 Post subject: Re: radiators
PostPosted: Mon Jul 05, 2010 4:29 pm 
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Joined: Wed May 26, 2010 2:19 pm
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Location: arizona
With the 250cc roketas, the radiator almost needs to be replaced no matter what, they are so small. Mine runs around 200 degrees when I am running it to try to get it working as it should, I am thinking of getting a jeep cherokee radiator, like this one "http://cgi.ebay.com/ebaymotors/JEEP-CHEROKEE-87-88-89-90-4-0-L6-ALL-ALUMINUM-RADIATOR-_W0QQcmdZViewItemQQhashZitem3a5784ca00QQitemZ250576423424QQptZMotorsQ5fCarQ5fTruckQ5fPartsQ5fAccessories#ht_3843wt_1161" but used, in my town, theres a local one for $45. I think it would be a good fit.


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 Post subject: Re: radiators
PostPosted: Mon Jul 05, 2010 4:45 pm 
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dd827 wrote:
Gman, what temps are you running with your bbk. Thanks Shannon


The Joyner cooling system seem to cycle between 180-205, reaching 212 degrees once. This was giving it a steady diet of hills. My main goal was see how hard I could push it after fixing the overflow tank and blocking off the barbs. It did run much cooler than my previous outing, whne that carb line was building pressue and leaking antifreeze all over the place. Btw I must add that I was running closer to lean than rich, that wa by design.

As for the Dune I do not have a temp gauge, (woring on it). The Dune was running hot prior to the radiator mod. Currently I have a Honda del sol radiator with 12" fan, and no t-stat. Prior to this set up the Dune was runnig hot, so hot I pulled the t-stat while riding, prior to the radiator mod. I have not put the t-stat back in because I want to install a temp gauge and do comparisons. However the Dune ran very cool (by feeling the hoses) compared to the Joyner.

Fyi, I hoping to find a temp gauge that I put the sensor in the radiator drain hole, get a sensor for the t-stat housing. Hope some of this informantion helps, let me know what direction you go, and the results.

Greg

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 Post subject: Re: radiators
PostPosted: Mon Jul 05, 2010 4:46 pm 
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Silent Wolf where are you located?

Here's the del sol radiator on the Dune.

Greg


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 Post subject: Re: radiators
PostPosted: Mon Jul 05, 2010 5:13 pm 
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Location: arizona
Arizona, just put it in profile. I called a local radiator shop, and they gave me tha price.


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 Post subject: Re: radiators
PostPosted: Mon Jul 05, 2010 5:30 pm 
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Great, I've been accused of smoking something by my east coast brothers (what's up Digger). That's okay I still dig these guys. They just got to understand, trying to ride a vehicle in the summer's desert heat, will expose any flaw in your colling system.

Greg

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 Post subject: Re: radiators
PostPosted: Mon Jul 05, 2010 8:11 pm 
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ChuckOrlando wrote:
Gman I also bypassed the carb. But I ran the return line from the carb to the rad, up to the overflow on the can. That way it always flows back to the rad instead of dropping on the dirt.


If your talking about the Joyner, did you put a "tee" in the line, or did you use the overflow drain? Another thing, how much coolant is in the overflow, maybe 1/4 full?

Greg

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