IW STi Forum banner

Fuel calculator/fuel pump decision

1379 Views 2 Replies 2 Participants Last post by  patwade21
So I've been researching a way to know for sure if my fuel set up is adequate. If my calculations are correct my set up should be just fine, but any input or things I might not have thought of are welcome. I figured sharing might help someone else figure out if their fuel pump set up will be accurate.

So here is my set up

Aeromotive stealth 340 LPH (liters per hour at 40 PSI)
Aeromotive*|*11140 - 340 Stealth Fuel Pump Center Inlet

Injector Dynamics ID1000s

On the Injector dynamics site they show the flow rates of all of their injectors
Injector Dynamics - ID1000

Above is the link to the ID1000s and the Aeromotive 340 flow graph's

So to calculate I simply converted CC's to Liters

Injector dynamics is showing that the ID1000 flow rate is 1015cc/min at 3bar 43.5 PSI

After calculations each injector is capable of 1.015 liters per min

I then times that number by 4 (4 injectors on the engine)

And then times that by 60 (60 min in an hour)


1.015X4= 4.06L

4.06X60=243.6L

So if my calculations are correct I should have a safety net of 96.4 L per hour give or take a little for pressure differences.

Anyone have any input or see holes in what I'm doing?
See less See more
1 - 3 of 3 Posts
Don't forget when you boost, fuel pressure rises and fuel pump's rated flow drops.

The stock fpr is 43 psi. When you boost 20 psi, the fpr raises fuel pressure to 63 psi. I didn't look at the pump's rating, too lazy.
Don't forget when you boost, fuel pressure rises and fuel pump's rated flow drops.

The stock fpr is 43 psi. When you boost 20 psi, the fpr raises fuel pressure to 63 psi. I didn't look at the pump's rating, too lazy.

crap see i knew i had forgotten somthing, thanks for reminding me.. I have a aftermarket regulator on it but ill have to talk to my tuner and see what kind of fuel pressures he wants to run and recalculate.
1 - 3 of 3 Posts
This is an older thread, you may not receive a response, and could be reviving an old thread. Please consider creating a new thread.
Top