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6.5 swap

dually man

dually man

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Sandpoint, Idaho
Ok, here we go, Im getting ready for the 6.5 DB2 swap into my 91 V3500 crewcab (old body style). Truck has a 350 gasser now but is getting a ATS turboed 6.5 in its place. A few questions. First of all, can I use the factory in fuel tank electric fuel pumps, for the gas TBI the tech manual says they produce a pressure of 9 to 15 psi. There is allready return lines so that is solved. Another question is I just pulled the heads for inspection, they look ok, have just a couple of small cracks between the valves, and the precups have cracks on them also, should I use them??? The precups have a square stamped into them, what does this mean? This truck is heavy but it will not see any towing, just getting firewood and daily driver use.
 
The pumps "innards" may not be happy with Diesel fuel vs gasoline, gas specced pumps generally don't hold up well in Diesel.

What is the ID of the line from the tank to the IP, and also what is the ID of the return line back to tank, gasoline sock on end of the pump is prone to blocking it needs a bypass check for really cold days when fuel in tank is "thick".

What is the gph of the gas fuel pump?
 
ok, from the sounds of it Im better off replacing the sending units with diesel ones and adding an inline lift pump. As for picts of the heads thats gonna be kinda hard, I work from sunup to sun down, and my shop has flourescent lighting, well my digital camera wont take a picture under flourescent lighting, it makes waves in the photo ARGGGGGGG
 
dually man said:
............6.5 DB2 swap into my 91 V3500 crewcab (old body style). Truck has a 350 gasser now but is getting a ATS turboed 6.5 in its place. ...................
Click to expand...
that is going to be a great truck when you get the bugs worked out. i would remove the gasser pump, put in a lift pump from a 93, cut the line at the frame, same place the diesel ones are from the factory. connect the pump with rubber lines. connect the OPS to it so there is some safety. you will need an overdrive, probably have 4.10 gear now. if you keep power stock, i would get a 700R4 with a Corvette servo. these hold up to stock power, won't need a computer either. do the precups have a diamond?
 
Hey thanks deejaaa, This truck has the 4l80e transmission, I picked up a compushift controller from a guy that did not install it, I allready have the 4l80e DB2 TPS, I just need a torque converter now. Yes it does have 4.10 gears with 35 inch tires. I have a set of diamond precups but the ones in the heads are square stamped. thanks for the replys
 
unfortunatly the truck is parked in my shop with the flourescent lighting, my stupid camera wont take a ledgible picture in there. pulling out the 350 gasser now
 
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