Join Date: Oct 2007
Location: Middle VA
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The intent to allow more fuel into the heads. The idea of drilling banjo bolts has been around on other boards for a few years now. Some feel the RR kit is the best solution using -6 up to -8 fuel lines to the heads. Another argument is to just drill out the banjo bolts on the front of the heads.
I was able to locally source banjo bolts with larger openings and no check valve. I just swapped in larger steel lines and the larger banjo bolts to the front of the heads with no real gains. Yes getting to these banjo bolts is difficult but I could do it again easily if I needed to. I don't think you will get more smoke from drilling the bolts.
There is a reality that at WOT the rear injectors are getting starved for fuel. Open up the restrictions and they get feed the fuel they need. Drill the bolts or install a RR kit, it's your choice.
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(In support of Zmann's request)