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Simmo wrote: > > What compression ratios are ppl here running? and what sort of heat do they > run? Can anyone suggest a better ratio to run? > In my 1835 Engine I am running at around 9.0:1. It is connected to a stock tranny, but rear tyres are 205 50 15, so the final drive has changed, also the car is a lot lighter than stock. When driving at 75 / 80 mph on the motorway in a hot english summer the oil temp got to a max of 115 degrees C ( the sensor is in the external filter housing). I have had no problems with this set up on the road or on the drag strip where I have compleated 5 or so 1/4 mile runs straight after each other. The thing only to be aware of is that I use high octane 98 (UK octane) Super unleaded petrol oops, I almost forgot to say that I have fitted a T1 fan setup and use standoffs on the boot lid. Nic Webb 71 fastback Team Roobarb & Custard