If you read through the modding the injection pump post I put up, it talks about the AFC housing... You can get more fuel if you grind the fuel pin to allow the pin that travels on it to go in further. You can buy them (they are adverstised for the cummins diesel engines), but you can just as easily weld up one side and then grind the other side deeper. Just make sure you have a very smooth polished surface for the pin to ride on when your done.
Jason
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