Had a fairly interesting conversation with a gentlemen today about putting my car on the rolling road. It turns out he won't go near anything with a compression ratio higher than 10:1 on the grounds that any engine [Datsun A-Series in this context] running above that is excessive and certain to fail.
My motor is pressing a 12.5:1 ratio and going by this blokes commentary earlier on today, I won't be able to find a tuner......
Can anyone shed any light on this? Particularly someone who actually runs a high comp ratio successfully on HO Pump Fuel.