[s-cars] Question about compression ratios and tuning

[James Bufkin]

Scott,
I do think I have a lower compression 2100cc block. (at least lower than a 
stock 3b)
I will probably pull the head to verify that.

For my case in particular,
I suspect that I have a modified 3B ECU with a 2.5bar transducer.  If the 
CR is around 7:1.   Then I have a deficiency in the ECU.
I will be keeping the alloy sportblock.  I don't see any logic in taking it 
out for some extra HP, I think I'll be happy with the engine's HP running 
in the realm of what its supposed to do..   If I need to raise the boost 
pressure into the stratosphere to do that I will.

Second question.  What normally happens when an ECU that is expecting to 
see an 02 sensor input doesn't have one?

James