Originally Posted by phunk

If its a stock high compression engine, the Walbro 450 will support 675-750 rwhp E85 (dynojet STD).

Where it ends will depend on:

- how much boost you need to reach your goal. Higher intake manifold pressure means higher fuel rail pressure means reduced pump output.

- how much timing you run, if you push it to where e85 really can go, the same fuel will be worth a lot more power.

- how much pressure drop the stock fuel pipe causes and how you integrate the fuel pump to the module. Generally to put the 450 in, following the CJM Level 2 fuel pump modifications, this means you would have cut out the stock fuel filter and need to put one under the car. To do this generally means removing the stock fuel pipe, giving you an opportunity to upgrade the size, using a high flow filter, reducing pressure drop, and getting the most out of the pump. But I am not sure exactly how you have chosen to install the pump or integrate a filter, etc.