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How to tune for a High Compression Engine
Hi all,
I wanted to buy an off the shelf XPT map for my MY01 WRX. The only trouble is my engine, a EJ208 longblock (9:1 compression ratio, not usual 8:1) (out of a 03 legacy B4 GT ) I can match all the XPT requirements except my higher compression engine. So which tables would i need to modify in the XPT rom to A: create a safe/low performace map, B: create a maximum performance /safe map my GUESS.. is: please correct if i am wrong A (safe ): reduce boost from 18psi to 16psi max, then log knocking and reduce timing in thoes areas B(perforance): As above then.... not sure.... maybe increase boost, increase timing back again and watch for knocking? Would any other tables need to be changed? Any help is great Thanks sam |
Tags |
compression, engine, high, tune |
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