Overheating

Jp23

Member
I get 8-10 good laps on stock appearing can’t run methanol after 10 laps it get hot and starts breaking up and popping any help on keeping it cool would be great!
 
How many cc's in chamber, what timing , what jet , how much tape , which oil?
Free the chassis up . Sounds lean or running outta fuel.
 
Not sure head milled 050 37 jet at the time no tape and thinnest royal purple I could get chassis is loose and handles like I drive and could be running lean I’m not great at adjusting these carbs
 
How hot was hot? How many minutes of run time, is the rod seizing ?
Jet 37 is a stocker smallish size . oil need heavier , colder plug .
any aluminum specs on the plug or erosion indicating detonation ?
Shorter fater pipe .
 
DO you have a Mychron or other device to measure temp? I'd go up in jets in increments of 2 to see if it it helps. If that doesn't then look at the coil, it may be getting hot and shutting down.
 
If you are running alcohol a 37 jet is to small. You also need a carb that was built for alcohol. You can't run a stock carb with a ,37 jet when running alcohol. That is your problem. If you want an alcohol carb I have s couple or you can have someone around you build one for ya
 
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