Valve Piston Clearance Bring Out the Clay!

acotrel said:

Even if I don't increase the rev limit ? - I'm under the impression that the bottom end failures are usually due to over-revvig. !2 to 1 comp. is not ultra high. We have an880 JAP with is on 17 to 1, and a 600cc two-valve Jawa which is on 16 to 1. Methanol tends to save your motor. Petrol is a very nasty fuel to race with.

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And Methanol isn't??????

What Is Methanol And What Hazards Does It Pose?

INGESTION EXPOSURE:

Ingestion of methanol may cause a wide range of adverse health effects:

Neurological: headache, dizziness, agitation, acute mania, amnesia, decreased level of consciousness including coma, https://www.cdc.gov/niosh/ershdb/emergencyresponsecard_29750029.html seizure.

Gastrointestinal: Nausea, vomiting, lack of an appetite (anorexia), severe abdominal pain, gastrointestinal bleeding (hemorrhage), diarrhea, liver function abnormalities, and inflammation of the pancreas (pancreatitis).

Ophthalmologic: visual disturbances, blurred vision, sensitivity to light (photophobia), visual hallucinations (misty vision, skin over the eyes, snowstorm, dancing spots, flashes), partial to total loss of vision, and rarely eye pain. Visual examination may reveal abnormal findings. Fixed dilated pupils are a sign of severe exposure to methanol.

Other: Electrolyte imbalances. Kidney failure, blood in the urine (hematuria), and muscle death at the cellular level (rhabdomyolysis) have been reported in severe poisonings. Fatal cases often present with fast heart rate (tachycardia) or slow heart rate (bradycardia) and an increased rate of respiration. Low blood pressure (hypotension) and respiratory arrest occur when death is imminent.

More information;

https://www.cdc.gov/niosh/ershdb/emergencyresponsecard_29750029.html