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Re: American Bosch PSB fuel injection pump question

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01-29-2013 04:39:45

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It gave noticeably more power, but increased fuel isn't all you need to do. I'm running the PSB pump, but it has a larger head and you'll need to advance the timing, the injectors were worked, and this engine made its best power around 1800-2000 rpm, although we ran it to 2800 or so. Dad had it on a dyno years ago and was claiming 70 HP.

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01-29-2013 07:36:42

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 Re: American Bosch PSB fuel injection pump question in reply to mightymolinekid, 01-29-2013 04:39:45  
Where did you have your Pump reworked along with the bigger head? I have a GTBD that I put 504 blocks on the 425 motor and I wish it smoked like that. I had my pump redone and I have the slider all the way foreward just like the instructions on here said but it hardly smokes at all even under a heavy load.

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01-29-2013 13:35:58

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 Re: American Bosch PSB fuel injection pump question in reply to M-M, 01-29-2013 07:36:42  
My pump already had the bigger head on it, thanks to my Dad, some 25 years ago. I had Fair Valley Performance in Sauk City, WI go through it and the injectors though. (608) 643-0200. I think (not sure) they can get a bigger head for your 6 cylinder, and if not, your next step is a Roosa-Master, which will need a bigger head that I know for sure they can do. They did one for my G705 diesel, and it now smokes like the UB in the picture. The advantage to the roosa-master is the fuel and timing is adjustable at the pump, rather than having to take a bunch of stuff apart. You will need to find a core pump off of a MM diesel though, due to they are left hand rotation.

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