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Old 01-02-2015, 03:39 PM   #1
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Default Walbro 255 remap needed?

My car has the standard fuel pump on it at 120,000 miles I'm thinking I might swap in the walbro 255 I have sitting in my garage just to be safe.

If I do this will I need to get my map adjusted?

Car is a 1.8 turbo with megasquirt and 550cc injectors.
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Old 01-02-2015, 03:45 PM   #2
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possibly. the base pressure on your fuel rail will increase so you may just need to lower your req_fuel ever so slightly.
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Old 01-02-2015, 04:31 PM   #3
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Ok I'll see if I can get hold of my mapper and ask him.
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Old 01-02-2015, 06:32 PM   #4
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Quote:
Originally Posted by Braineack View Post
possibly. the base pressure on your fuel rail will increase so you may just need to lower your req_fuel ever so slightly.
I'd expect the base pressure to increase at idle, but not at higher RPM. A retune may be required, IMO.
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Old 01-03-2015, 12:20 PM   #5
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If you can run a proper regulator and set it for the stock base pressure you wont need a re-tune at all. I wouldnt run the wally 255 on the stock regulator. Too many people complain of fluctuating fuel pressure at idle.
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