Holley sniper efi
09-22-2020 | 10:34 AM
#51
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Joined: Mar 2003
Posts: 3,076
Likes: 80
From: Fort Worth, TX
PM’s and email is where conversations go to die for me. My wife can confirm this, lol.
I don’t have any pics but the install is very straight forward and the directions are pretty clear. Loads of info on the holley boards as well.
I went with the Weldon 600A pump as they can lift as well as push.
I was lucky to already have a bung in the fuel tank for the return line. I believe I ran 5/8” fuel lines everywhere.
The DUI has been a great ignition for me. The previous owner just used the OEM 16g wire to power it. When I wired it properly it picked up 500 rpm just like that. I set the base at 18° and 32° all in.
It’s on a fresh 509 that *might* be close to 600hp in dyno trim. 272 Baja Islander.
I don’t have any pics but the install is very straight forward and the directions are pretty clear. Loads of info on the holley boards as well.
I went with the Weldon 600A pump as they can lift as well as push.
I was lucky to already have a bung in the fuel tank for the return line. I believe I ran 5/8” fuel lines everywhere.
The DUI has been a great ignition for me. The previous owner just used the OEM 16g wire to power it. When I wired it properly it picked up 500 rpm just like that. I set the base at 18° and 32° all in.
It’s on a fresh 509 that *might* be close to 600hp in dyno trim. 272 Baja Islander.
09-22-2020 | 11:17 AM
#52
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Joined: Oct 2013
Posts: 2,888
Likes: 148
From: SF Bay Area
09-23-2020 | 03:44 PM
#53
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Joined: Sep 2009
Posts: 419
Likes: 14
From: Lake Winnipesaukee, NH
You have me convinced. I didn't notice the 12 gauge requirement when I put in my DUI.
I just put 12 gauge through a relay today.
Interestingly the tech guy at performance distributors, the source for DUI, thinks the units only draw 3 amps.
Also he thought a fuse was uneeded. Sorry, I fuse things.
A 12 gauge wire can carry up to 20 amps. Electrical wisdom says protect the wires. So I installed a 7.5 amp fuse between the starter link and the relay.
I couldn't buy a relay with 12 gauge leads locally so I swapped the power leads over from 14 to 12 gauge. The notes on the relay box claim it has 30 amps capacity. Hmmm.
I'll carry some fuses I suppose.
It's supposed to be nice tomorrow so I'm planning to go for a ride. I'll see if I get any more rpms.
But I am in the middle of jetting and power valve tweaking too.
I'll have to stay way out in the middle, the lake is down 2 feet from drought.
I just put 12 gauge through a relay today.
Interestingly the tech guy at performance distributors, the source for DUI, thinks the units only draw 3 amps.
Also he thought a fuse was uneeded. Sorry, I fuse things.
A 12 gauge wire can carry up to 20 amps. Electrical wisdom says protect the wires. So I installed a 7.5 amp fuse between the starter link and the relay.
I couldn't buy a relay with 12 gauge leads locally so I swapped the power leads over from 14 to 12 gauge. The notes on the relay box claim it has 30 amps capacity. Hmmm.
I'll carry some fuses I suppose.
It's supposed to be nice tomorrow so I'm planning to go for a ride. I'll see if I get any more rpms.
But I am in the middle of jetting and power valve tweaking too.
I'll have to stay way out in the middle, the lake is down 2 feet from drought.
09-25-2020 | 05:12 PM
#54
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Joined: Sep 2001
Posts: 1,542
Likes: 55
From: Kingsville----lake erie
Kid Turbo made a bunch up for some of us using Holley EFI so we could use a MFD for monitoring. Look him up -- he might have some left out of his last batch...
09-25-2020 | 05:15 PM
#55
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Joined: Sep 2001
Posts: 1,542
Likes: 55
From: Kingsville----lake erie
My bilge is a filthy mess and I haven’t tidied up the rigging yet, but you can see the general layout here with the return line doubling back with the feed line. In the bottom right you can see the filter head mounted as high as possible to help feed some head to the pump to help keep it primed. My return line goes back to the tank. You can plumb it back into filter head but that does heat up the fuel a good deal.
09-25-2020 | 06:31 PM
#56
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Joined: Oct 2013
Posts: 2,888
Likes: 148
From: SF Bay Area
You’ll also notice that I mounted the fuel filter as high as possible so that it always has a fresh head of fuel to prime with. It’s not perfect but has worked so far.
11-25-2020 | 06:49 PM
#57
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Joined: Jun 2004
Posts: 8,219
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From: St-Hyacinthe, quebec, canada
11-26-2020 | 07:22 AM
#58
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Joined: Apr 2007
Posts: 283
Likes: 19
From: Sunrise Beach Mo
Not trying to highjack but I am going through kind of the same thing now. Getting ready to rebuild my 575's and change over to a better fuel injection system. My two choices are the replacement plate style, like Youngs performance, or can I go with Snipers?
11-26-2020 | 01:48 PM
#60
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Joined: Apr 2007
Posts: 283
Likes: 19
From: Sunrise Beach Mo
Well, I like the sound of saving money just fine, but the never getting it right part doesn't sound fun at all. lol. I am looking at a couple of builders at the lake now and am upgrading from the flat tappets to a roller cam and want them dyno tuned and trouble free when I get them back in. I am going to be retired and too old to want to mess with them much any more. This boat has been a long project for me and am finishing the interior as well this winter, I just want to go boating this year!!!
