Max power on single walbro 450 pump?
Apr 20, 2016, 09:54 AM
#31
If your riding on the edge, there are companies that sell voltage boosters for the fuel pump. From what I have heard most fuel pumps really improve from increased voltage. I would think increased voltage would especially help at higher line pressure too. I believe some mfg's publish their flow numbers at higher voltages as well.
Jun 5, 2017, 10:37 AM
#32
I am planning on switching to E85 and I have HTA Green on stock engine. From my understanding I will probably be making less than 500whp.
The car has a 255lph pump right now and I will be replacing it with a 450lph E85 pump. Will it be ok to run the pump without hard wiring it in my case? I am thinking about getting FIC 1650cc hiz injectors.
The car has a 255lph pump right now and I will be replacing it with a 450lph E85 pump. Will it be ok to run the pump without hard wiring it in my case? I am thinking about getting FIC 1650cc hiz injectors.
Jun 5, 2017, 11:08 AM
#33
EvoM Guru
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I would not run the walbro 450 on stock wiring. Follow mrfred's rewire guide to maintain the hi/lo voltage function.
Jun 5, 2017, 01:19 PM
#35
Evolving Member
Please be aware there are reports coming out from some respective evo shops that recent batches of 450s have been failing. There's likely a bad batch out there. I myself have been running one for 2+ years without issues but if you just grabbed one or are thinking of grabbing one it might be safer to go with a bosch044 or something from Fuel Lab's prodigy lineup.
Jun 5, 2017, 01:45 PM
#36
EvoM Guru
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Jul 20, 2017, 07:05 PM
#40
I've had good results with a boost a pump or JMS voltage booster on many cars . My current evo has made 650whp on a red. A boost a pump @14Volts Walbro 450 on id1700s at 90% duty . Stock lines, regulator and radium rail on 85% ethanol content on a Dynojet.
I think a few have made 700whp with correct voltage to a 450 pump on ethanol.
The 450 pump is stout for less then 700whp would be my choice with a voltage or pump controller. A single pump is easy to diagnose compared to dual pumps if fuel flow starts to decrease over time.
I think a few have made 700whp with correct voltage to a 450 pump on ethanol.
The 450 pump is stout for less then 700whp would be my choice with a voltage or pump controller. A single pump is easy to diagnose compared to dual pumps if fuel flow starts to decrease over time.
Last edited by Abacus; Jul 21, 2017 at 07:05 AM.
Jul 21, 2017, 04:07 PM
#42
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I run a 450 with FP Black SS FiTronic E85 2000cc IJD upgraded lines and FPR and I am just hitting barely 600whp. Tuner told me something was up with my fuel system even though I did the proper upgrades for the 450. I feel like I can def go more but I guess im happy with 600whp for now
Mar 12, 2018, 10:30 AM
#44
I followed MrFred's guide to add a hobbs switch for a high current line to my 450, but I seem to be running out of pump around 30psi at 550ish whp dynojet numbers on an FP Red with FIC 1650s. Would the next step be to just do a -6an line from the hardline to rail and drill out the siphon?
Mar 13, 2018, 10:10 AM
#45
EvoM Guru
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Drilling out the siphons helps control regulator over run. It won't make more power. An aftermarket fuel rail and 6an feed line will help.
