EFI Hemi guys - which single 4 intake for EFI conversion ?
#2587767
12/05/18 09:23 PM
12/05/18 09:23 PM
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Joined: Sep 2005
Posts: 625 Deep DEEP SOUTH
LAD 524
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mopar
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mopar
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Hey guys, I have access to 2 intake single plane 4500 intakes; the Barton and the Indy 426-4 along with a Stage V EFI dual quad intake.
Which one would make a better intake for an EFI conversion and why? Id be looking to run an Accufab 4500 TB.
Apart from height/plenum volume differences, they pretty much both need a longer injector (I have a set of Siemens Deka 80lbs/hr) which one would be a better choice for a street/strip, 4.10 geared 572 Hemi ?
Alternatively, would I be better off with the Stage V EFI dual quad intake with dual TBs and if so, why ?
This should be interesting, really keen to hear your opinions.
Last edited by LAD 524; 12/06/18 12:36 AM.
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Re: EFI guys - which single 4 intake for EFI conversion ?
[Re: LAD 524]
#2587783
12/05/18 09:58 PM
12/05/18 09:58 PM
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Joined: Sep 2005
Posts: 625 Deep DEEP SOUTH
LAD 524
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Thanks Andy hood clearance isnt an issue. Not interested in Fitech or any other TB EFI - port EFI is what Im looking to do When considering the 2 single plane intakes, would the Indy be better for an EFI/dry intake application due to the bigger plenum vol or is it no different running the smaller Barton? A case of same same ? Similarly will the dual quad have better tip in with the dual 4150s or is it not a problem with a big 4500 TB ? ECU will likely be a Haltech Elite 2500, a Holley HP or a Autronic SM4. Thanks
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Re: EFI guys - which single 4 intake for EFI conversion ?
[Re: LAD 524]
#2587916
12/06/18 02:57 AM
12/06/18 02:57 AM
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Joined: Jan 2003
Posts: 1,938 Sonora CA
Mopar_Rich
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top fuel
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Hey Rich thanx for the input - fuel rail mounting etc I can do easily enough.
Got you on the TPS and IAC, I assume the HP will be fine with the dual TBs.
When you say the duals perform a little better, what are you referring to? Tip in, tuneability, air distribution ?
Thx HP or Dominator EFI would be my choice. Both can drive both IACs if you need more IAC air for idle control. Tuneability is easy with the Holleys in either case. Also, dual 4150 TBs are nice on the street with their progressive linkage, yet flow like a bandit at full throttle. My racer customers running dual TBs give up nothing on driveability yet picked up some HP on the dyno and a little better ET. I even have one customer running dual Drive-By-Wire TBs on his 1000 HP HEMI so he can soften the tip-in even more.
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Re: EFI guys - which single 4 intake for EFI conversion ?
[Re: LAD 524]
#2587984
12/06/18 10:58 AM
12/06/18 10:58 AM
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Joined: Jan 2003
Posts: 8,035 Tulsa OK
Bad340fish
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master
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Tulsa OK
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Softer tip in would be nice with two throttle bodies. I have two 1000CFM and it only takes a soft breeze on the pedal to go down the highway lol. My system doesn't support DBW and I am not sure I am ready to trust it yet if it did.
68 Barracuda Formula S 340
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Re: EFI guys - which single 4 intake for EFI conversion ?
[Re: LAD 524]
#2588004
12/06/18 11:59 AM
12/06/18 11:59 AM
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Joined: Sep 2008
Posts: 656 Florida
CJD AUTOMOTIVE
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mopar
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Craig Scholl CJD Automotive, LLC Jacksonville, FL www.CJDAUTOMOTIVE.com904-400-1802 "I own a Mopar. I already know it won't be in stock, won't ship tomorrow, and won't fit without modification"
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Re: EFI guys - which single 4 intake for EFI conversion ?
[Re: LAD 524]
#2588048
12/06/18 01:48 PM
12/06/18 01:48 PM
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Joined: Jan 2012
Posts: 2,678 Stuttgart, Arkansas
rickseeman
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2 4bbls look much more hemish. It seems to me the Edelbrock intake is a perfect for your street/strip car.
2011 Drag Pak Challenger
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Re: EFI guys - which single 4 intake for EFI conversion ?
[Re: Mopar_Rich]
#2588099
12/06/18 03:06 PM
12/06/18 03:06 PM
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Joined: Feb 2014
Posts: 1,713 central il.
second 70
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Hey Rich thanx for the input - fuel rail mounting etc I can do easily enough.
Got you on the TPS and IAC, I assume the HP will be fine with the dual TBs.
When you say the duals perform a little better, what are you referring to? Tip in, tuneability, air distribution ?
Thx HP or Dominator EFI would be my choice. Both can drive both IACs if you need more IAC air for idle control. Tuneability is easy with the Holleys in either case. Also, dual 4150 TBs are nice on the street with their progressive linkage, yet flow like a bandit at full throttle. My racer customers running dual TBs give up nothing on driveability yet picked up some HP on the dyno and a little better ET. I even have one customer running dual Drive-By-Wire TBs on his 1000 HP HEMI so he can soften the tip-in even more. Rich wouldn't progressive linkage be a problem on a stage v manifold the way each plenum only feeds 4 cylinders?
Last edited by second 70; 12/06/18 03:06 PM.
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Re: EFI guys - which single 4 intake for EFI conversion ?
[Re: Mopar_Rich]
#2588442
12/07/18 04:24 AM
12/07/18 04:24 AM
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Joined: Sep 2005
Posts: 625 Deep DEEP SOUTH
LAD 524
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Stage-V has a cross over between the plenums. And the straight linkage opens both throttle body primaries together. The progressive part is the primaries to secondaries on each throttle body. Hi Rich I was under the impression that the Eddy intake has a crossover plenum as well ?
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Re: EFI guys - which single 4 intake for EFI conversion ?
[Re: LAD 524]
#2588468
12/07/18 08:15 AM
12/07/18 08:15 AM
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Joined: Sep 2005
Posts: 625 Deep DEEP SOUTH
LAD 524
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Great - the Eddy air gap speaks to me As a side note, what MSD or ACCEL COP coil is the right length for an Indy head/valve cover on a Hemi ? Will the Mopar V6 or Ford Coyote coil be long enough? I had a look around but the lengths of these coils cant be found on Holley's website. Has anyone done this Rich ?
Last edited by LAD 524; 12/08/18 12:22 AM.
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Re: EFI guys - which single 4 intake for EFI conversion ?
[Re: LAD 524]
#2589408
12/09/18 03:46 PM
12/09/18 03:46 PM
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Joined: Oct 2006
Posts: 246 Cranberry Twp PA (North of Pit...
rumblefish72
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Great - the Eddy air gap speaks to me As a side note, what MSD or ACCEL COP coil is the right length for an Indy head/valve cover on a Hemi ? Will the Mopar V6 or Ford Coyote coil be long enough? I had a look around but the lengths of these coils cant be found on Holley's website. Has anyone done this Rich ? Coyote coils fit ... the coil boot that goes over the spark plug is ~1/2" too long and needs to be trimmed. As long as the Coyote coil you choose uses the stainless steel spring as the connection between the coil and the spark plug electrode, you can push it on and it will fit. I purchased the MSD Coyote coils and once trimmed, they fit properly into the spark plug tube. The pictures below show a stock replacement Coyote Coil trimmed to fit a stock Hemi spark plug tube.
1972 Pro-Street 'Cuda, 500" Eagle stoker B Block, Eddy RPM heads, Victor Manifold, 850 Mighty Demon, Hemi 4 Speed, Dana 60 w/4.88 gears - Built by Hansen Racing Middlesex - NJ
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