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2/3 HP to the Paws
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1,519 Posts
adjuster said:
Also if they want more than 20.00, just buy a Walbro, the extra 70.00 is worth it to have a new pump, and one that flows more than the Mk4 pump too.
The Mk4 pump is only good up to about 450rwhp from what I've read.
You read wrong. The Denso Supra TT pump is a 260lph unit which flows more than the Walbro 255, especially at lower voltages.

You can swap the MkIV pump in relatively easily. Just disconnect the feed and return lines, unbolt the plate, and pull it out. It will more or less drop into the mkIII tank with little modification.

You'll also want to wire the pump directly to the battery via a relay switched with the old fuel pump power source, which will give you maximum power and flow out of the pump.
 
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