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High Volume Fuel Pump Conversion for the SL6 *PIC*
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Author:  Doctor Dodge (Doug Dutra) [ Fri Oct 26, 2001 8:47 pm ]
Post subject:  High Volume Fuel Pump Conversion for the SL6 *PIC*
Tim K had a question on converting a Big Block Mopar fuel Pump for use on the SL6. Below is a pic of a pump I converted a while back. This Carter fuel pump has big passages and 2 inlet valves. (stock units have a single valve)

One thing I did was rotate the inlet body and added some hard line fittings so I would get better access to the ports.

You need to swap the arm out of the stock Carter SL6 pump into the BB unit. I used a shim between the arm and the pump's plunger rod. This took-up some "free play" at the end of the pump's stroke which resulted in a lot of clearance between the cam eccentric and the arm's contact pad, when it was on the back-side of the eccentric. ( it will still work without doing this but you will get less total pump stroke)

I also did some passage "deburring" (porting) while I had the pump apart and added a flair fitting to the vent hole if I ever need to apply boost pressure to the backside of the diaphram.

This pump delivers 7 lbs of pressure at low / part throttle speeds and drops to 3-4 lbs at the end of a quarter mile full throttle blast.
DD


Image
Author:  Tim_K [ Mon Oct 29, 2001 4:27 pm ]
Post subject:  Re: High Volume Fuel Pump Conversion for the SL6
Quote:
: Tim K had a question on converting a Big Block
: Mopar fuel Pump for use on the SL6. Below is
: a pic of a pump I converted a while back.
: This Carter fuel pump has big passages and 2
: inlet valves. (stock units have a single
: valve)
:
: One thing I did was rotate the inlet body and
: added some hard line fittings so I would get
: better access to the ports.
:
: You need to swap the arm out of the stock
: Carter SL6 pump into the BB unit. I used a
: shim between the arm and the pump's plunger
: rod. This took-up some "free play"
: at the end of the pump's stroke which
: resulted in a lot of clearance between the
: cam eccentric and the arm's contact pad,
: when it was on the back-side of the
: eccentric. ( it will still work without
: doing this but you will get less total pump
: stroke)
:
: I also did some passage "deburring"
: (porting) while I had the pump apart and
: added a flair fitting to the vent hole if I
: ever need to apply boost pressure to the
: backside of the diaphram.
:
: This pump delivers 7 lbs of pressure at low /
: part throttle speeds and drops to 3-4 lbs at
: the end of a quarter mile full throttle
: blast.
: DD


I picked up my new pump today. It's a Carter pump, and I specified the high volume high pressure model. It doesn't look like the one in this picture. The body halves are crimped together. It was a $24.00 pump. I've gotten the information about switching the operating arm, but no one bothered to mention that the pump will now be upside down! Now I have to re-bend my fuel lines to make it work. I'll work on it tomorrow. I'll have to Dremel grind out the crimps holding the shaft in place. Then recrimp it with a high tech hammer and screwdriver. Or maybe a chisel.
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