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408 Fuel System
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10sec.et
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Joined: 29 Mar 2006
Posts: 3473
Location: Houston,Texas
346658.74 points


1969 Oldsmobile Cutlass

PostPosted: Wed Sep 02, 2015 1:48 pm    Post subject: Reply with quote

Paul, you dont need that much fuel line for EFI. we're running 3/8 feed. ive personally seen 915hp to the ground with 3/8 feed line. many of our builds are 600+hp.
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Paul P
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Joined: 15 Aug 2002
Posts: 2403
Location: Townsend, Mass.
81574.74 points


1971 Chevrolet Chevelle

PostPosted: Wed Sep 02, 2015 3:58 pm    Post subject: Reply with quote

Just a simple thing for me really. I already have a -8AN aluminum main line running up to the front so changing it for $30 is cheap enough. It is what they recommend and I think it will allow the pump to run cooler with a less restrictive line size.
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2001 Focus 2.0 Zetec
stock cams, bolt-ons and tune
15.63@87 MPH 1/4mi

1971 - Chevelle 408 SBC N/A
6.86@102.5 MPH 1/8mi
10.78@122 MPH 1/4mi
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10sec.et
Member


Joined: 29 Mar 2006
Posts: 3473
Location: Houston,Texas
346658.74 points


1969 Oldsmobile Cutlass

PostPosted: Wed Sep 02, 2015 10:45 pm    Post subject: Reply with quote

that's cool. just didn't want you to dump a bunch of money into a new fuel system if you didn't need to.
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Paul P
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Joined: 15 Aug 2002
Posts: 2403
Location: Townsend, Mass.
81574.74 points


1971 Chevrolet Chevelle

PostPosted: Thu Sep 03, 2015 10:21 am    Post subject: Reply with quote

HP EFI manual says I should be fine with the 08AN line so that is likely good to go. See Fuel line sizes section from the manual below.

10.1 Fuel Line sizes

Fuel line size is important with EFI, but there is a tendency to oversize feed lines. A high pressure EFI system does not need the same size lines as a low pressure carbureted engine. A 3/8 diameter line (-6AN) line is adequate for engines to at least 750 HP. This is a conservative number. A 1/2 diameter line (-8AN) line should be used on engines over 750 HP.

The regulator included with this kit includes 8AN inlet fittings. The line used to go from the fuel rail(s) to the regulator should be 8AN
if these fitting are used. If different lines are desired, different fittings for the regulator need to be obtained. It is ok to use 8AN lines to the regulator, but different sized inlet lines to the rails such as a 6AN.

If you need a fitting that has a -6AN inlet for the regulator, purchase Earls PN 985068ERL.

The return fitting on the regulator has a 6AN fitting. Use a 3/8 diameter return line for most applications.

NOTE: On very high horsepower applications (1000+ HP), follow the guidelines given by the fuel pump manufacturer for fuel system design.

_________________
2001 Focus 2.0 Zetec
stock cams, bolt-ons and tune
15.63@87 MPH 1/4mi

1971 - Chevelle 408 SBC N/A
6.86@102.5 MPH 1/8mi
10.78@122 MPH 1/4mi
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10sec.et
Member


Joined: 29 Mar 2006
Posts: 3473
Location: Houston,Texas
346658.74 points


1969 Oldsmobile Cutlass

PostPosted: Thu Sep 03, 2015 1:44 pm    Post subject: Reply with quote

i will admit that, the Camaro that put 915 to the ground, took two high output pumps to keep up. the biggest issue was blowing off the hoses in the tank. proably falls into the "just because it can be done...." category. Wink
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af2 wrote:
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Paul P
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Joined: 15 Aug 2002
Posts: 2403
Location: Townsend, Mass.
81574.74 points


1971 Chevrolet Chevelle

PostPosted: Thu Sep 03, 2015 5:38 pm    Post subject: Reply with quote

Filters and fittings arrived today. I bought the Summit ones and they look fine but I am wondering if they are deep enough to reach the seal point in the filter? They look short. Not sure that the Aeromotives were any longer for double the price.
_________________
2001 Focus 2.0 Zetec
stock cams, bolt-ons and tune
15.63@87 MPH 1/4mi

1971 - Chevelle 408 SBC N/A
6.86@102.5 MPH 1/8mi
10.78@122 MPH 1/4mi
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10sec.et
Member


Joined: 29 Mar 2006
Posts: 3473
Location: Houston,Texas
346658.74 points


1969 Oldsmobile Cutlass

PostPosted: Thu Sep 03, 2015 10:25 pm    Post subject: Reply with quote

not sure i follow. ive used the summit filters and they work well as long as they have the stainless screen.
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af2 wrote:
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Paul P
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Joined: 15 Aug 2002
Posts: 2403
Location: Townsend, Mass.
81574.74 points


1971 Chevrolet Chevelle

PostPosted: Fri Sep 04, 2015 9:05 am    Post subject: Reply with quote

Aeromotive filters and summit fittings. Sorry. Should have clarified a bit more on that. The o ring fittings look but looking at the depth of the 37 degree seat on the filter I am not sure that the fitting is long enough reach that seat with it's 37 degree end.
_________________
2001 Focus 2.0 Zetec
stock cams, bolt-ons and tune
15.63@87 MPH 1/4mi

1971 - Chevelle 408 SBC N/A
6.86@102.5 MPH 1/8mi
10.78@122 MPH 1/4mi
Back to top
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10sec.et
Member


Joined: 29 Mar 2006
Posts: 3473
Location: Houston,Texas
346658.74 points


1969 Oldsmobile Cutlass

PostPosted: Sat Sep 05, 2015 1:35 am    Post subject: Reply with quote

ah, i see. ive had some that were really close to bottoming out but sealed with about .030 to spare. only way to know is to try them.
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af2 wrote:
It seems we can look at our magical Balls and come up with a fix?

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Paul P
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Joined: 15 Aug 2002
Posts: 2403
Location: Townsend, Mass.
81574.74 points


1971 Chevrolet Chevelle

PostPosted: Sat Sep 05, 2015 5:46 pm    Post subject: Reply with quote

Turns out that the filters are setup for O-Rings to seal the fittings. Just have to buy a 10 pak.
_________________
2001 Focus 2.0 Zetec
stock cams, bolt-ons and tune
15.63@87 MPH 1/4mi

1971 - Chevelle 408 SBC N/A
6.86@102.5 MPH 1/8mi
10.78@122 MPH 1/4mi
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Paul P
Member


Joined: 15 Aug 2002
Posts: 2403
Location: Townsend, Mass.
81574.74 points


1971 Chevrolet Chevelle

PostPosted: Thu Sep 17, 2015 12:37 pm    Post subject: Reply with quote

Lots of fittings and injectors are on their way. 66lb/hr 1050HP max should have good margin for this setup.
Very Happy

All in it with the Aeromotive pump and filters about $2750. What I have ordered lists out at about $3277 on summit so I feel like I did pretty good about saving over $500. Very Happy

_________________
2001 Focus 2.0 Zetec
stock cams, bolt-ons and tune
15.63@87 MPH 1/4mi

1971 - Chevelle 408 SBC N/A
6.86@102.5 MPH 1/8mi
10.78@122 MPH 1/4mi
Back to top
View user's profile Send private message
10sec.et
Member


Joined: 29 Mar 2006
Posts: 3473
Location: Houston,Texas
346658.74 points


1969 Oldsmobile Cutlass

PostPosted: Thu Sep 17, 2015 1:56 pm    Post subject: Reply with quote

hell yeah!!!! Cool
_________________
af2 wrote:
It seems we can look at our magical Balls and come up with a fix?

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Paul P
Member


Joined: 15 Aug 2002
Posts: 2403
Location: Townsend, Mass.
81574.74 points


1971 Chevrolet Chevelle

PostPosted: Sat Sep 19, 2015 9:37 am    Post subject: Reply with quote

Parts arrived. Pulled the tank and fitted the new -10AN outlet for the big pump. Never liked the uni-bit in my toolbox for much but it is perfect for enlarging the hole in the plastic hardwood fuel cell. I also enlarged the hole in the trunk floor for the -10 bulkhead with the uni-bit. The problem was upon installing the bulkhead and 90 degree fitting on top of it the fitting was now taller than the outlet on the tank by almost 2 inches! What I'll have to do is put a new hole at the back of the trunk where it is at an angle to keep it low enough. This also allows me to put the connector further to the drivers side which will help fitting lines to this long filter-pump-filter assembly. This thing is big. It's only a minor setback. Working from the tank forward is the way to go. Thinking about isolating the pump on some rubber mounts to lessen the vibration and give me some clearance. Any of you guys with the Aeromotive pump do the same?
_________________
2001 Focus 2.0 Zetec
stock cams, bolt-ons and tune
15.63@87 MPH 1/4mi

1971 - Chevelle 408 SBC N/A
6.86@102.5 MPH 1/8mi
10.78@122 MPH 1/4mi
Back to top
View user's profile Send private message
Paul P
Member


Joined: 15 Aug 2002
Posts: 2403
Location: Townsend, Mass.
81574.74 points


1971 Chevrolet Chevelle

PostPosted: Wed Sep 23, 2015 12:32 pm    Post subject: Reply with quote

Pump mounted and plumbed underneath.
In



Out


Mounted

_________________
2001 Focus 2.0 Zetec
stock cams, bolt-ons and tune
15.63@87 MPH 1/4mi

1971 - Chevelle 408 SBC N/A
6.86@102.5 MPH 1/8mi
10.78@122 MPH 1/4mi
Back to top
View user's profile Send private message
10sec.et
Member


Joined: 29 Mar 2006
Posts: 3473
Location: Houston,Texas
346658.74 points


1969 Oldsmobile Cutlass

PostPosted: Wed Sep 23, 2015 9:55 pm    Post subject: Reply with quote

that's about how i did mine. although, i didn't use the rubber mounts. its still quieter than those Holley pumps WITH rubber mounts. looks good thumbsup
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af2 wrote:
It seems we can look at our magical Balls and come up with a fix?

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