I was looking at this for someone and figured it as handy to share more widely. I will have to scan in some graphs for the complete picture but here's a summary.
With 12V across the fuel pump terminals for exactly 15 seconds...
The S2 (3B and ABY) fuel pump should deliver 650cc of fuel. Something in the area of 2.2 liters per minute is needed for ~400bhp remembering that we will something like 1.5-1.6bar boost in play for a rail pressure of up to 5.6bar. This might be a stretch for a tired old S2 fuel pump - especially if the fuel filter is old and congested.
What is the max power anyone has ran reliably on the S2 fuel pump I wonder ?
Sorry if this has been done to death before but I couldn't find it...
The RS2 pump is rated for 750cc which equates to 3 liters per minute which gives some more headroom.
The next level up is the Bosch 044 motorsport pumps which provide even higher flow capacity - there is a very high specification one capable of flowing well with a lairy 8bar fuel rail, but the normal choice is nominally rated at 5bar.
With 12V across the fuel pump terminals for exactly 15 seconds...
The S2 (3B and ABY) fuel pump should deliver 650cc of fuel. Something in the area of 2.2 liters per minute is needed for ~400bhp remembering that we will something like 1.5-1.6bar boost in play for a rail pressure of up to 5.6bar. This might be a stretch for a tired old S2 fuel pump - especially if the fuel filter is old and congested.
What is the max power anyone has ran reliably on the S2 fuel pump I wonder ?
Sorry if this has been done to death before but I couldn't find it...
The RS2 pump is rated for 750cc which equates to 3 liters per minute which gives some more headroom.
The next level up is the Bosch 044 motorsport pumps which provide even higher flow capacity - there is a very high specification one capable of flowing well with a lairy 8bar fuel rail, but the normal choice is nominally rated at 5bar.
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