![]() You'll need a boost gauge and pyro as a minimum before doing boost/fuel mods. Pump timing should be though of more as a "fine" tuning. Have you increased fueling and boost? much better result than dicking with pump timing. The effect on emissions is significant the NOx level increases dramatically past just a couple of degrees of advance and brake specific fuel consumption drops off quickly as well. ![]() It also increases cylinder pressures (which obviously won't show on a boost gauge but cause significant stress increases) Off boost performance increases however you will have increased turbo lag. Increasing the timing results in increased cylinder pressures and higher peak flame temperatures which leads to a more complete burn of the fuel injected. Unfortunately you can't have both.ĭecreasing timing will result in better emissions and fuel economy at the expense of power. For the power and the fuel economy, you know.įirst of all, you have to choose what you want: performance or economy.
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