those mods. You would be able to achieve that with either the JWT program or our Stage upgrade programming EPROM. The numbers we got on Jeff's car (the dyno shown) were done with conservative tuning; the last and final run was made with my stage5 upgrade EPROM and it made 543RWHP (because the timing is also at 18 degrees). But it made slightly less power because it was running richer (as my programs target 11:1 for pump fuel EPROM programs). His car actually ran about 11.3:1 vs. the 12:1 I was running it while tuning with the ZEM (on race fuel). If I had advanced the timing another 5 degrees (which would have been possible and still within safe bounds on race fuel) it would have added about 20-25HP more.