my injection pump is off of a 2670 case and the turbo off of a 4890 case. not for sure how big (mm) the turbo is but i will measure it on thursday. what kind and size bit did you use to drill out the injectors? and what size john deere pump is capable of 800cc?

 

i am not for sure on the tips i will ask and find out, but just about any pump off of a jd can be built to go 800, but it is highly modified and there are only a couple of shops that can make them flow that much.

 

we drilled out the injectors a considerable amount and there was no noticeable power change. the tractor ran smoother at higher rpms but that was it. i guess it will have to stay like this for the rest of the season. i havent pulled it yet like this. the last time it pulled it was only making 185 hp and it spun out in fourth high. now 1st we have a local pull so i guess i will see what is going to happen. im going for broke.