FE446 first dyno resuls
Senior User
Joined: Jun 2003
Posts: 113
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i also second trying a holley or deomon carb.
used to have a 77 4x4 with a built 429, heads, cam etc.....fell flat on its face after about 3700 rpm with the edlebrock no matter what i tried, it only like the holley 750..........
also i currently have a 65 stang with a built 302 and it doesnt like anything else than a 750 either....everything else it has idle issues...........and it's always ran the strongest with the holley.
i bet you'll notice a big diff with a 750 or bigger......especially in the mid and upper rpm's...........by the way gtex, about whats the redline on that beast you've built???
used to have a 77 4x4 with a built 429, heads, cam etc.....fell flat on its face after about 3700 rpm with the edlebrock no matter what i tried, it only like the holley 750..........
also i currently have a 65 stang with a built 302 and it doesnt like anything else than a 750 either....everything else it has idle issues...........and it's always ran the strongest with the holley.
i bet you'll notice a big diff with a 750 or bigger......especially in the mid and upper rpm's...........by the way gtex, about whats the redline on that beast you've built???
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Lead Driver
Joined: Apr 2001
Posts: 6,175
Likes: 21
From: Texas
this is what I got form their tech dept.
Greg
A 750 Vacuum Secondary Speed Demon P/N 1402010VE, and a dual feed fuel line P/N 140020 should work extremely well on your truck. We'd also recommend using a 1" 4-hole carburetor spacer between the carb, and intake manifold P/N 110019.
Thank you
Tech @ Barry Grant, Inc.
parts are on the way (I did go with the VFE carb to try their Ford Kickdown linkage). I also got an H-Pipe kit. Another $570 dumped into this cash pit....
Greg
A 750 Vacuum Secondary Speed Demon P/N 1402010VE, and a dual feed fuel line P/N 140020 should work extremely well on your truck. We'd also recommend using a 1" 4-hole carburetor spacer between the carb, and intake manifold P/N 110019.
Thank you
Tech @ Barry Grant, Inc.
parts are on the way (I did go with the VFE carb to try their Ford Kickdown linkage). I also got an H-Pipe kit. Another $570 dumped into this cash pit....
Last edited by gtex; Nov 24, 2003 at 12:57 PM.
Post Fiend
Joined: Sep 2000
Posts: 8,238
Likes: 3
From: Oregon
Greg, you might also want to pick up the Demon tuning book by SA design. I think it would really help you out in dialing that in. I think you'll be very pleased, I am very impressed with the Demons. I prefer the mechanical secondaries myself over vacuum but they are definitly more forgiving and easier to dial in. Good luck!
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Lead Driver
Joined: Apr 2001
Posts: 6,175
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From: Texas
Luvfordtrucks,
Software estimates that this motor is done making power at 4500 RPM. The hardware is good for well over 6000 rpm, but that is where the MSD 6AL Rev limit is currently set at.
Software estimates that this motor is done making power at 4500 RPM. The hardware is good for well over 6000 rpm, but that is where the MSD 6AL Rev limit is currently set at.
Senior User
Joined: Jun 2003
Posts: 113
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thats pretty awesome.............i can just see an engine like that boiling the tires with it turning not many rpm's......lol....be interesting to see what it'll do after your carb swap or injection swap...........
Elder User
Joined: Sep 2003
Posts: 794
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From: Portland, OR
Hey there,
Carters have there place and it's anywhere but on a performance engine. On a 446 with a roller cam in a truck that weighs around 4000 lbs I'd go with either a 750 holley dual feed mechanical secondary or an 850 vac. secondary. If you want to combine some technology with tuning your truck and not buy the fuel injection, put O2 sensors in your exhaust and read the voltages with a multimeter.
Carters have there place and it's anywhere but on a performance engine. On a 446 with a roller cam in a truck that weighs around 4000 lbs I'd go with either a 750 holley dual feed mechanical secondary or an 850 vac. secondary. If you want to combine some technology with tuning your truck and not buy the fuel injection, put O2 sensors in your exhaust and read the voltages with a multimeter.
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