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DIY twin pumps on the quick and cheap

 
Old 02-04-2008, 05:23 AM
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Man, I wish FFS vettes were this easy and cheap.

Nice writeup
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Old 02-06-2008, 12:28 AM
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so to confirm from 2 posts up, when using walbro 340's, you do not need to run a one way check valve if running off a hobbs switch, correct? I think I'll do this on my vette!
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Old 02-06-2008, 01:29 AM
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Correct, the walbro's don't bleed pressure off fast enough to need one. However, if you wanted to you could.
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Old 02-06-2008, 06:42 AM
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they have a built in check just like the factory pump because thats is what they are for.
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Old 02-06-2008, 10:09 AM
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what did you do for fuel filters?
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Old 02-06-2008, 10:45 AM
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factory filter and new socks on the pumps that came with them
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Old 02-07-2008, 07:12 PM
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once Nice write up David!!!
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Old 02-11-2008, 03:10 PM
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You can only run a hobbs switch if you are running boost right? I was going to install my new fuel system before I get my blower in. I was gonna pay about $500 for a dual intake set up but I see you can save a nice coin doing it yourself. So I just need the pumps, clamps, wires, connectors, heat sinks and a relay? What kind of relay? What about the first pump, I know the stock wiring isn't good enough so should I buy a hot wire kit for that one or should I just run my own and ignore the stock wiring? I figure I could just run one main power wire back there (maybe 12 gauge) and split it to each pump. Would that work or am I talking stupid?
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Old 02-11-2008, 10:52 PM
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Good write-up. I have done this same thing on Call 911's car and will be doing this on my car also as my build progresses.

Question: You mentioned "goop" to seal up the hole drilled in the top of the cover. What exactly did you use? I wouldn't think RTV would hold up that well.
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Old 02-11-2008, 11:03 PM
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Originally Posted by [email protected] View Post
and just to make this thread useful for every year f body here is what to do if you have a 99-02 car.

After step 8 add these quick steps in for your bucket:

Cut out the bottom and sides of the bucket:




Then place both pumps together and run -6an line from each pump to the stock barb fitting, in this case i used a T-fitting because a large Y block like MM used will not fit in the 99-02 bucket.



In the end the bucket should look close to this with the fuel pump filters not sticking all the way out of the bottom of the bucket, if they do the feeds will be directly against the floor of the tank and pick up debris and hinder flow:

Very simular to mine Josh although I did use a Y block don't remember who's, but I screwed it right into the #8 90 that I used right out the top of the fuel bucket top and MM is right the stuff called GOOP is great and fuel resistant I ran two 50 amp relays for mine with a single 10 gauge wire and used the factory supply as my +12 on the relays so they opperate the same as stock etc... Great write up guys!
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Old 02-12-2008, 12:34 AM
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great write up, this should be a sticky. I will be doing this shortly.
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Old 02-12-2008, 06:03 AM
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goop is the brand name. i dunno whats in it, but its very good and fuel tolorant.
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Old 02-12-2008, 11:04 AM
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Originally Posted by MIGHTYMOUSE View Post
goop is the brand name. i dunno whats in it, but its very good and fuel tolorant.
Thank you sir, that's what I needed. For what it's worth, I've searched high and low for a low profile 90* bulkhead electrical connector like the stock piece is, with no luck. That would obviously be the best way to go, but yours is the most practical in the current state of not having a connector source.
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Old 02-12-2008, 08:38 PM
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very nice writeup.....
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Old 02-13-2008, 09:19 PM
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Nice write up guys, just a heads up. When you cut out the plastic bucket on a street car, I wouldn't cut out the sides. Just pop a hole in the bottom (3/4 inch will be plenty) and don't hog out the entire bottom of the fuel bucket. The stock gas plastic tank isn't baffled right for this, so just having a hole in the bottom keeps the bucket full of fuel so the pump remains completely submerged when you are low on fuel and you make a few turns. And when you are running a little low on gas, when fuel sloshes around the pumps can briefly run dry which can cause sputtering etc. I speak from experience ...
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Old 02-19-2008, 03:36 PM
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will this work on a 1995? It used to be a v6 and is in the process of being a turbo 6.0L (truck motor) Should I put bigger fuel lines on too? Or will stock be okay? thanks
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Old 02-19-2008, 11:18 PM
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should bea sticky with the single walbro install.
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Old 02-19-2008, 11:47 PM
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Originally Posted by melon07 View Post
will this work on a 1995? It used to be a v6 and is in the process of being a turbo 6.0L (truck motor) Should I put bigger fuel lines on too? Or will stock be okay? thanks
Yes it will work on a 95.
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Old 02-21-2008, 10:37 PM
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wow I never paid attention to this thread until now. good stuff man!
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Old 02-25-2008, 12:35 AM
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I have an '00. Could I use two of the Racetronix's Plus Systems? Run the second harness to the second pump and then run both harnesses per the instructions? They say these pumps are pretty drop in and go. So, my system should not need any other modifications correct? This would probably be a good time to go to a bigger feed line as well? -8?
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