For 1990-1999 Mitsubishi Eclipse, Eagle Talon, Plymouth Laser, and Galant VR-4 Owners. This is where the DSM platform history is documented and archived. Log in to help us in our mission, and to remove most ads from the browsing experience.
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Is this about the Spyder listed in your profile, or...?
..And if you do have a gst spyder, why don't you stick with that?
Ok, the "norm" for boosting set-ups is 8.8. Our stock ratio is 9.6 comp. Using 8.8 comp gives you a bit more of a cushion for tuning problems. I'm a big proponent of using higher comp pistons (say 10.5) with turbo apps because it gives you a little more pop down low and the boost reacts better (like more power on the same amount of boost) with higher comp. But that requires that you watch your tune a little better. But these cars are not all that sensitive to knock (with my turbo set-up I was not knock limited until I got around 400whp with a 10.5 comp set-up).
After driving around on my first motor(8.8:1) and driving around on my last (10.5:1) the low compression motor sucks balls out of boost. Deff go with the higher compression, even if its just stock compression.
