Expert opinion please... EFI setup

[sethmark]

Anyone have an opinion of this short AN hose and bulkhead connector? It packaged nicely, but for whatever reason bothers me.

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[JimLev]

That short hose didn't come in my kit, did that come with your fuel injection kit?
I've made and purchased plenty of AN3, 4, and 6 hoses, never had a problem with any of them.

[sethmark]

No. I tossed most of their kit and made my own... I opted to run the Corvette filter/regulator and mount everything behind the seat out of the elements. I anticipate that Walbro pump being noisy, so I’ll need to dynamat the inside of the waterfall.

The short hose and bulkhead fitting is my doing.

[FF33rod]

Don't see why it should be a problem. You'll find out soon enough when the system gets pressurized.

[NAZ]

I don't expect you will have any issues with that short length of hose. Very neat installation. If you want to keep everything AN in the future you can go with these style filters with replaceable elements: https://www.summitracing.com/parts/sum-230123r/overview/

[sethmark]

The prefilter is that style. I figured for the filter/ regulator an off the shelf part would make roadside repairs painless.

[TxMike64]

I think it looks great! Just so you have enough slack and it's flexible enough to replace the filter...

[NAZ]

Seth, that small cylindrical item in the suction line looked like a check valve -- a popular item on race cars to keep from emptying your tank in a crash that rips the fuel line loose. If that's a filter I''ll leave you with something to ponder in case you have any fuel system related issues that are hard to troubleshoot. Running a pre-filter in a horizontal attitude tends to trap air in the upper section. That air can cause pump suction issues and cavitation. I've seen this so bad that a pump would loose its prime. Yours is a smaller diameter so may not be an issue, the larger diameter ones trap a lot of air that eventually burps into the suction of the pump. It's a best practice to run pre-filters in the vertical orientation to prevent air entrapment.

[sethmark]

Thank you for the heads up. I will keep it in mind if I run into issues. I’ve use this filter in the past with good success, but not dead level.

[BluePrintEngines]

A good fuel filter of the proper size is crucial. looks like you have an earls on there, so good.

Another thing is that Corvette filter MUST be the GM or a WIX brand. The parts store versions are known to pressure creep.

Few things i have picked up in my experience over the years.

tucked in there that nice, you don't want to have to be changing them anytime soon!

[More Than You Think]

How did you plumb the charcoal canister? It appears to be under the tank in this picture.

[sethmark]

It is under tank. It’s mounted right side up with just enough wiggle to not pinch hose....

[More Than You Think]

Seth
I was asking how you plumbed it. I assume you have no fuel vapor capture system or controls on your engine. How are you going to purge the charcoal when it gets saturated with fuel from the vent?
Thanks

[JimLev]

My LS3 has an electrically operated purge valve that connects to the intake manifold. I ran a line from the charcoal canister up to the valve. The electric part hasn't been connected yet, I'll either have a switch control it or a timer circuit.

[65 Cobra Dude]

Seth, nice work! You will need more than Dynamat to not hear the fuel pump. I see the foam around the pump but think you still need to rubber insulate the fuel pump brackets and filter brackets to the frame. I use material used to seal the bottom of a garage door. Simple, cheap and effective.

Henry

[sethmark]

Seth, nice work! You will need more than Dynamat to not hear the fuel pump. I see the foam around the pump but think you still need to rubber insulate the fuel pump brackets and filter brackets to the frame. I use material used to seal the bottom of a garage door. Simple, cheap and effective.

Henry
Honestly Henry, you can’t hear squat when the cars moving.. I put about 100 miles on it since getting plates, not including the 130 or so miles I put on it before plates. So far so good

[rapidray]

Have to agree with the noise issue. Sometimes I wish I could hear the pump as every time I work underneath the dash I inadvertently hit the darn fuel cutoff switch. I honestly considered removing the annoying thing. Ray

[sethmark]

Have to agree with the noise issue. Sometimes I wish I could hear the pump as every time I work underneath the dash I inadvertently hit the darn fuel cutoff switch. I honestly considered removing the annoying thing. Ray

I ditched it.

[sethmark]

With regard to the canister question, it’s no different than a carbureted vehicle. I use a canister on those two. When it finally saturates, you’ll smell it. Otherwise, I’m not too concerned about it. It’s still better than venting the atmosphere

[sethmark]

Just a quick update on the set up. The pump is freaking noisy. I didn’t really notice it until spending an entire day in the car.

[More Than You Think]

Thanks for the feedback and sharing your experience.

[sethmark]

You bet. I’m pretty sure it wouldn’t be a whole lot quieter in a roadster under the car, but I would help a little I’m sure. With some sound deadening, the irritation will go away. But after 300 miles, it sucks.

[Smoking Joe]

I sent you a PM

[Grusks]

Hi Everyone

Hope everyone is ok whilst whilst avoiding the Covid 19


Im on lockdown in the Uk so time to send on my 33 and also helping with a 10 year old homework

Just about to order my Fuel Line bits as not keen on the FFR pipe work


Am i right in the sizes of AN fitting i need mostly AN6 for the fuel and an4 for the return ( hope its ok to use your pic seth a guide )

[JimLev]

AN6 and 4 are good unless your planning on some mega HP engine.

[peterh226]

Here's what I have. Kept it simple for the filters and pump. I want to be able to fix easily if I have a problem on the road. Vent hose goes to evap canister under the gas tank. The bulkhead fittings go to hard line up to another pair of bulkhead fittings up front.

125335

[Plimpton]

Peter and Seth,
Did you guys use the F5 supplied in-tank fuel sender unit un-altered? I have a Blueprint EFI 306 SBF. I used the Holley fuel plumbing kit as provided by BP, running the 6an hoses for both supply and return to and from the throttle body but, I reduced the fuel return line at the F5 fuel tank sending unit with an Earls 6an to 1/4” SAE quick disconnect fitting and I did not install a drop tube on the inside of the tank. I specifically checked this with F5 and they said this was good. But, I’m currently getting ready for my first engine start and received an updated FAQ/info sheet from Blueprint and it says, “If your fuel pick-up has a 1/4” return, the Sniper kit has a bulkhead fitting that can be used to replace the 1/4” return. DO NOT FORGET the drop tube. With EFI, you want to return fuel below the fuel line”. I really don’t want to drill my tank for the larger return line unless it’s absolutely necessary.

So again, I’m asking what your install is and what your experience has been? I welcome others to offer comments, too.
Thanks

[sethmark]

The return just keeps cool fuel running through the system instead of dead heading at the throttle body/ injector. In my LS setup, the return is in the filter. Look at the first picture I posted. When the fuel dead heads, the pressure bypasses at the filter and returns to tank. I cannot comment on what holley wants with the sniper, as I haven't installed one yet.

[Plimpton]

The return just keeps cool fuel running through the system instead of dead heading at the throttle body/ injector. In my LS setup, the return is in the filter. Look at the first picture I posted. When the fuel dead heads, the pressure bypasses at the filter and returns to tank. I cannot comment on what holley wants with the sniper, as I haven't installed one yet.

Seth, does your return line have a diptube in the fuel tank?

[sethmark]

As built in to the factory sender. The filter asks as the bypass.