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Fuel pump recommendations

Old 10-22-2018, 12:42 PM
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Thatís what I was thinking too. Doubt Iíd ever need a 450 but was looking at the 340 pumps. Good advice.
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Old 10-22-2018, 01:05 PM
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450 is too much for the stock regulator to keep at 58 psi of fuel so you'd have to retune for the increased fuel pressure (usually around 70psi). 340 will work with the stock regulator and maintain ~58 psi.
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Old 10-22-2018, 06:31 PM
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Originally Posted by ddnspider View Post
450 is too much for the stock regulator to keep at 58 psi of fuel so you'd have to retune for the increased fuel pressure (usually around 70psi). 340 will work with the stock regulator and maintain ~58 psi.
Thanks, that's what I'm gonna look for.
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Old 10-23-2018, 09:54 PM
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Originally Posted by ddnspider View Post
450 is too much for the stock regulator to keep at 58 psi of fuel so you'd have to retune for the increased fuel pressure (usually around 70psi). 340 will work with the stock regulator and maintain ~58 psi.
Would you happen to be running a 340 pump with a stock regulator? WS6's page stated it won't work and I'd have to upgrade to a vette setup which would put me way over budget as the reg kit is 140 bucks.
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Old 10-24-2018, 07:24 AM
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Originally Posted by Dano 00TA View Post
Would you happen to be running a 340 pump with a stock regulator? WS6's page stated it won't work and I'd have to upgrade to a vette setup which would put me way over budget as the reg kit is 140 bucks.
Yes, I'm doing it on 1 of my cars right now with the stock regulator. Fuel pressure at the fuel rail is measured at 58psi. A 255 and a 340 will usually be ok with the stock regulator, but a 450 will push through the regulator and raise the fuel pressure to something around 70psi.
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Old 10-24-2018, 10:28 AM
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So this is the kit I'm gonna go with. Could probably save a few bucks piecing one together but I want it as painless as possible. http://www.ws6project.com/user_stor/...oducts_id=8399
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Old 10-24-2018, 10:50 AM
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looks legit.
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Old 12-13-2018, 01:26 AM
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hmm, that's kit im looking into. Will it fit in factory location with no mods? I have patriot 5.3 l heads, MS3 cam, FAST 90/90 setup and true duals. After I rebuild my trans soon I know I need a new tune bc I have a **** one on there(just bought car) and I know my pump is weak. I don't plan on spray, but if I got brave, no more than 100. Im building trans for 800 hp. Figured this size pump to have more than a need.
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Old 12-13-2018, 11:14 AM
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Originally Posted by DYING BREED View Post
hmm, that's kit im looking into. Will it fit in factory location with no mods? I have patriot 5.3 l heads, MS3 cam, FAST 90/90 setup and true duals. After I rebuild my trans soon I know I need a new tune bc I have a **** one on there(just bought car) and I know my pump is weak. I don't plan on spray, but if I got brave, no more than 100. Im building trans for 800 hp. Figured this size pump to have more than a need.
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Yeah, it'll go right in. Hardest part I had was running the wire down from the top of the tank down to the bottom....make sure you have someone help so they can see the wire poking up and grab it. I got up and down a lot of times till I got it. And I'm no spring chicken. I did have an internal battle on whether to cut the "trap door" as I never was onto cutting on any of my cars but I'm sure glad I did. Do it right and it won't even be noticeable.
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Old 12-14-2018, 12:20 AM
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car isn't cut and wont be, just a preference. so new wires will need to get run thru the top of pump housing? im thinking of just pulling tank when I send the trans out to the shop so no rush to get done. I can push it off lift into the other bay. I just think I would rather go with larger pump and not make it work as hard or worry about running lean on top end, esp if I do more work or add spray. Thanks
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Old 12-14-2018, 02:16 AM
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I never would've cut mine either so I don't blame you there at all, but since I modded it I already basically ruined it as far a re-sell....not that I ever would or will. If you drop the tank, it'll be easy to run the wires. Mine just run along the original ones to the top of the tank. It's only a bit of a pain if you "don't" drop the tank, then you have to lower it some and fish them up in there. And your reasoning is why I went with a 340 over a 255 also. Only issue I'm having is now the pressure is around 65/67lbs instead of 55. I'm sure regulator related but so far it hasn't caused a problem.
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Old 12-14-2018, 11:22 AM
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Trap Doors FTW
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Old 12-14-2018, 02:14 PM
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Originally Posted by Mavn View Post
Trap Doors FTW
Yep, a few years ago I'd never have done it but it did make things so much easier. If done correctly it won't be a problem or noticeable at all.

One issue I forgot to add was once in a while when the car is sitting the pump may come on for a second or so...I notice 20-40lbs on the gauge that was on 0 and hasn't been started? I don't hear it but notice the pressure gain. I haven't figured out why this happens yet.
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Old 12-18-2018, 10:15 AM
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Trap doors make life so much easier! Its a must for sure
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Old 12-18-2018, 11:26 AM
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