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Got the final piece of the fuel pump puzzle. Going to have the MS3 GoldBox trigger this at 4-5psi to boost voltage to the pump. Going to turn the voltage back down to very slightly above normal. I want 13.9-14v at hot idle. When triggered this will boost voltage to 17.5v at the pump only. We will see how much it shorten pump life but this is the go to method for some other chassis that have a pump that is near the edge of being not enough.
12v in from Batt on fused(40a) red, good chassis ground on black, direct pass through when off on orange and when triggered orange outputs 17 ish volts. Ground trigger is Brown. DC-DC converter with passthrough.
Andrew what does the fuel pump booster do? Does the increased voltage correlate with increased pump output?
btw, lovin the build.
That is what it does.
I might be answering my own question again, but if the pump output is increased at the same kPa/RPM, then that is something that would require less VE at the same kPa/RPM which means a bit of retuning.
Is the voltage output of the multipler consistent?
Was the choice to go with the pump multiplier instead of larger injectors?
moar volts is betters. if the ecu can handle it, coils hit harder, injectors work faster, pumps pump more.
That last video coming around the Mustang was beautiful!
Sorry if I missed it, but why not leave harder? What stall converter RPM? Traction? trans brake? And I say that because you all pulling all of them on the back half. Once the launch is perfected, you are going to make some people cry looking at your taillights!
Did you verify the timing???
Once the launch is dialed, its gonna be mean at the track./QUOTE]
Yes it will!
That looks so gross man. Haha
Plz get a timing light and dial that in.
Just set in 6 degrees of offset. Both engines had that with the Elgin cam I don't even use a fuel filter with the 450 in the tank. Lol
Lol, pretty doesnt equal fast. It's secure and with how big that filter is, I dont ever see needing to change it out. Ill increase my fuel line size before its dirty at all. I will cut it open when the time comes to change it.
I was trying to find some solid data on a voltage boosted(over 13.5v) walbro 450 and could find nothing on the internet. So I went to the source.
Sent TI Automotive an email asking about data and charts. I received this in return.
He did mention to expect shortened pump life when running these higher voltages. My voltage booster when triggered outputs around 17.5v with 40amps available current at that voltage.
These walbro 450 pumps are monsters when fed the power they need. Zero fuel pressure issues with e85, deka 80's, 15psi, 6800rpm with a 7875 on a 4.8. Should be in the 530-550whp area on a Mustang dyno. Duty cycle tops out at 83% at 15psi which is far better than the 104% I was seeing at 12psi before.
At 73psi of rail pressure the flow increase from 13.5v to 17v is around a 40% increase.