(Bit off topic) turbo lag...

[justin ivan]

>What kind of high CR are you planning to use? 9 - 9.5 to 1 is about as high
>as you can get if you use 102 octane race fuel. With 98 unleaded, 8.5 - 8.8
>is probably very high. If you compress more, you'll reach the knock limit
>really early under boost and you'll need to set your spark advance to a
>(much) less than optimal point, negating most of the benefits of
>turbocharging.
>
I have to disagree with the concept of CR and turbos. Yes a lower CR does 
allow you the ability to run higher boost numbers without retarding timing 
too much, but I know of at least 2 (there are plenty more) guys that are 
running 1.8L 4 cyl with a stock static CR of 10.0:1. The key is careful 
tuning and a good programmable system. I know that they don't run higher 
then 102 octane fuel, and they are making some good power #'s. That being 
said it does require very careful tuning. I am building a turbo motor right 
now (2035cc 4 cyl DOHC) and I plan on running a static CR of 9.0~9.2:1 
depending on how the head gasket spacer I am using turns out. Going to run 
this on 92 octane with ~10-14lbs of boost depending on what I can tune it 
too. Of course I am going for a full programmable (in my case an 
aftermarket) EFI system
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