curious about compression

[mpt72]

Before I go off and get myself into trouble, I wanted to ask you fine folks here a question. If I was to bump up the compression to 8:5 to 1 from the original 7:8, and kept everything else stock (turbo, cams, etc), what supporting mods would I need to make this work? I'm assuming some type of ignition control and a good tune, but I want your input. Mind you, this is a "what if" question. It would be for a daily driver, and I'm not looking for super Hp or anything.

 

[tektic]

Nothing just be sure to keep good gas in it.

 

[mpt72]

91 is the norm here in california. Thanks for the swift reply!

 

[tektic]

I had a 90 DSM with 2g Pistons. I had no issues without any major mods.

 

[EHmotorsports]

you would want ecmlink and pull timing. 1g dsm and vr4 ecu's run extremely advanced timing and can cause detonation under load.

 

[CutlassJim]

Like said above me the timing tables in a stock ECU are retarded. They jump around to fast and are very aggressive in the high load cells. More compression is a wonderful thing but a good tune is the single most important and noticeable mod you can do to your car. The absolute first thing I would do to any 1G/GVR4 after maintenance is a 2G/3G MAF and DSMLink. A good tune even on an otherwise stock car is very noticeable.