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Need Advise on Throttle Body Injection for 426 Crate #2712668
11/04/19 01:01 PM
11/04/19 01:01 PM
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Alberta, Canada eh!
70Cudha Offline OP
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I'm contemplating installing a single Holley Sniper PART# 550-511K (max 650hp) 4 barrel Throttle Body Kit and the Holley Dual Sync Distributor on a bone stock 2010 Mopar Performance World Block 426 Crate Engine.
The car was built for the street and not the track.

Any suggestions from anyone with previous experience setting up a throttle body EFI on one of these engines and as to whether this is a good combo for that engine or not would be greatly appreciated.

Thank You in advance.


1970 EV2 Barracuda Hardtop
1970 FE5 Barracuda Gran Coupe Convertible
1969 B5 Dart GTS 383
1968 TT1 Barracuda Convertible
1997 Ram SS/T
2008 3500 Ram Diesel
Re: Need Advise on Throttle Body Injection for 426 Crate [Re: 70Cudha] #2712700
11/04/19 02:35 PM
11/04/19 02:35 PM
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Spokane Washington
ScottSmith_Harms Offline
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It will work but would likely work better with an equal length individual runner intake. Fuel distribution in a dual plane intake manifold can not be adjusted individually with a throttle body style injection unit like you can by staggering jets in a carburetor. .02

Re: Need Advise on Throttle Body Injection for 426 Crate [Re: 70Cudha] #2712724
11/04/19 03:54 PM
11/04/19 03:54 PM
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Originally Posted by 70Cudha
I'm contemplating installing a single Holley Sniper PART# 550-511K (max 650hp) 4 barrel Throttle Body Kit and the Holley Dual Sync Distributor on a bone stock 2010 Mopar Performance World Block 426 Crate Engine.
The car was built for the street and not the track.

Any suggestions from anyone with previous experience setting up a throttle body EFI on one of these engines and as to whether this is a good combo for that engine or not would be greatly appreciated.

Thank You in advance.


It should work okay. You might need to add a one inch open spacer to help with distribution and/or you might change to a single plane intake down the road but that is a tuning question. You'll be able to watch the plugs over time to see how the fuel distribution is working.

You should use a Hyperspark distributor not the dual sync. You don't need a dual sync for the Sniper and it requires an extra adapter. The Hyperspark should be plug and play.

The Sniper is sensitive to RF noise so you must be very careful with your wiring. You also have to use resistor spark plugs and resistor wires. Keep all of the ignition wires away from any Sniper wires. The Sniper needs 12 volts while cranking and running so you have to reconfigure the stock Mopar ignition wiring. Get rid of the ballast resistor and join the wires together so you have 12 volts cranking and running. There are various ways to do this. I just join the wires together but some people use a relay or even a time delay relay. Just depends what else you have hanging on those circuits.

Re: Need Advise on Throttle Body Injection for 426 Crate [Re: AndyF] #2712725
11/04/19 03:55 PM
11/04/19 03:55 PM
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If there is a EFI gas tank available for you car you should use it rather than buying the kit with the in line fuel pump. Most of the popular cars have an available drop in EFI tank with an internal pump.

Re: Need Advise on Throttle Body Injection for 426 Crate [Re: AndyF] #2712765
11/04/19 05:58 PM
11/04/19 05:58 PM
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Alberta, Canada eh!
70Cudha Offline OP
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Thank You gentlemen..................this is the kind of feedback I was looking for.
Regards


1970 EV2 Barracuda Hardtop
1970 FE5 Barracuda Gran Coupe Convertible
1969 B5 Dart GTS 383
1968 TT1 Barracuda Convertible
1997 Ram SS/T
2008 3500 Ram Diesel
Re: Need Advise on Throttle Body Injection for 426 Crate [Re: 70Cudha] #2712849
11/04/19 10:16 PM
11/04/19 10:16 PM
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If you want to buy everything from a Moparts member you can contact Rich at FAST Man EFI. He is a Holley dealer and an expert on both Hemi engines and EFI.

Re: Need Advise on Throttle Body Injection for 426 Crate [Re: 70Cudha] #2712926
11/05/19 10:01 AM
11/05/19 10:01 AM
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Benton, IL.
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DaveRS23 Offline
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Have you seen the Roadkill episode where they put EFI on a crate Hemi and started cross country? Plenty of problems, trouble getting tech help, only got 7mpg until they tuned and tuned with a lap top, and then they came out one morning and it had cleared all the tuning they had done, etc, etc.

Retrofit EFI is not a God send. When it works it is good, but not much if any better than a well tuned carb despite being much more expensive. But when it doesn't work, it can be worse than driving a phord. bawling

If you feel you must experiment with one of these kits, then the recommendation to go with Rich Nedbal is the only way to go. You will need tech advise and he has it in spades.


Master, again and still
Re: Need Advise on Throttle Body Injection for 426 Crate [Re: DaveRS23] #2713284
11/06/19 11:03 AM
11/06/19 11:03 AM
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Alberta, Canada eh!
70Cudha Offline OP
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70Cudha  Offline OP
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Appreciate the help.


1970 EV2 Barracuda Hardtop
1970 FE5 Barracuda Gran Coupe Convertible
1969 B5 Dart GTS 383
1968 TT1 Barracuda Convertible
1997 Ram SS/T
2008 3500 Ram Diesel
Re: Need Advise on Throttle Body Injection for 426 Crate [Re: 70Cudha] #2714189
11/09/19 11:27 AM
11/09/19 11:27 AM
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Sonora CA
Mopar_Rich Offline
top fuel
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Follow Andy's advise. It'll work just fine if you get a tank with the pump inside. A common issue that people run into with a TBI retrofit is if the engine has low vacuum at idle because of a radical cam. Then the Sniper needs to have the bottom end manually tuned, but the Sniper allows that - Holley just doesn't make a big deal about it because most TBI customers want to stay away from the laptop thing. I have remote tuned many-a-system that where when the customer didn't know about the self-tuning systems running rich at the low end if the vacuum is low, or the exhaust system has leaks, or open headers.

Re: Need Advise on Throttle Body Injection for 426 Crate [Re: ScottSmith_Harms] #2715675
11/14/19 12:18 PM
11/14/19 12:18 PM
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Alberta, Canada eh!
70Cudha Offline OP
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Originally Posted by ScottSmith_Harms
It will work but would likely work better with an equal length individual runner intake. Fuel distribution in a dual plane intake manifold can not be adjusted individually with a throttle body style injection unit like you can by staggering jets in a carburetor. .02


Scott

If I was to swap out the dual plane (P4876188) with a Barton (P5153781) should I expect any clearance issues with my shaker?

Thx


1970 EV2 Barracuda Hardtop
1970 FE5 Barracuda Gran Coupe Convertible
1969 B5 Dart GTS 383
1968 TT1 Barracuda Convertible
1997 Ram SS/T
2008 3500 Ram Diesel
Re: Need Advise on Throttle Body Injection for 426 Crate [Re: 70Cudha] #2715871
11/14/19 07:44 PM
11/14/19 07:44 PM
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Benton, IL.
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DaveRS23 Offline
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The Barton intakes are TALL. I made a 4500 Indy dual plane work under my Shaker, but it took a lot of work both over the carb and under the carb. The Indy single plane would have taken work too. I bought both to see how they would dyno. On my carbureted 540, the dual plane won just as Indy said it would. Given my experience with wedges, I didn't believe them and had to see for myself. They were right.

The Barton was a non-starter on my car. Way, way too tall.


Master, again and still
Re: Need Advise on Throttle Body Injection for 426 Crate [Re: AndyF] #2715948
11/14/19 10:18 PM
11/14/19 10:18 PM
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Watertown, WI
MikeyT Offline
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The EFI set ups are so nice and for the most part plug and play.. With the hand held monitoring device you can adjust on the fly and it tunes itself.. I love the Holley EFI set up.


1969 Dodge Dart Swinger
Re: Need Advise on Throttle Body Injection for 426 Crate [Re: MikeyT] #2715969
11/14/19 11:16 PM
11/14/19 11:16 PM
Joined: Jan 2003
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Spokane Washington
ScottSmith_Harms Offline
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Here is an example of a decent single plane dual 4 intake if using throttle body style EFI.

Edelbrock Hemi Intake.jpg






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