04-05-2018, 06:39 PM | #1 |
Junior Member
Join Date: Mar 2011
Location: Fairfield ct.
Posts: 84
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Speedmaster downdraft
Hello is anyone running a speedmaster downdraft injection system.
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04-05-2018, 07:35 PM | #2 |
Account Suspended
Join Date: Jun 2015
Location: No longer here
Posts: 1,000
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Re: Speedmaster downdraft
Its to good looking to have a hood over it covering it up...this injection system belongs on a vehicle that is open in the engine compartment, my opinion only....it sure is pretty......I installed a Holley EFI sniper on my 1972 blazer 4x4, for the money I think I made the right choice....I was not impressed with the HP increase on the speedmaster downdraft injection system but it sure looks great....
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04-05-2018, 07:53 PM | #3 |
Junior Member
Join Date: Mar 2011
Location: Fairfield ct.
Posts: 84
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Re: Speedmaster downdraft
ya I agree it sure has eye appeal and I never liked the way my stock ls intake looked
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04-06-2018, 10:35 AM | #4 |
Registered User
Join Date: Apr 2011
Location: Klein Texas
Posts: 3,852
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Re: Speedmaster downdraft
I bought one for a Ford 302 on close out. I paid about $400. Intake, throttle bodies, stacks, and fuel rails.
While you can't see it there is a common plenum connected via 1/4 holes to the individual throttle openings for a good vacuum signal (MAP) There's also individual vacuum ports on each of the throttle bodies to help balance the throttle openings. I am using a megasquirt/microsquirt for a controller. I planned on installing it in my '50 Ford coupe but other projects keep getting in the way. ooops, it that for an LS? No common plenum for that setup.
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My Classics: '72 K20 Suburban + '65 Dodge Town Wagon '72 Corvette Roadster +'67 Corvette Roadster '73 Z-28 Camaro '63 Ford SWB Uni Pickup '50 Ford Coupe |
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