Re: Holley sniper efi 4500
[Re: avenger572]
#2655878
05/15/19 11:59 PM
05/15/19 11:59 PM
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Joined: Mar 2007
Posts: 3,277
West Coast, USA
jbc426
master
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master
Joined: Mar 2007
Posts: 3,277
West Coast, USA
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I had an open ground on my heated O2 sensor harness. A buddy loaned me his Matco Scanner. It saved me with all the tests you can do on it, but it still took some sleuthing. Mine was going into limp mode after the first minute of running, because the ground was open. I fixed that and it ran normally.
1970 Plymouth 'Cuda #'s 440-6(block in storage)currently 493" 6 pack, Shaker, 5 speed Passon, 4.10's
1968 Plymouth Barracuda Convertible 408 Magnum EFI with 4 speed automatic overdrive, 3800 stall lock-up converter and 4.30's (closest thing to an automatic 5 speed going)
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Re: Holley sniper efi 4500
[Re: gsmopar]
#2656046
05/16/19 04:00 PM
05/16/19 04:00 PM
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Joined: May 2004
Posts: 12,383
Taxes & Virus's R-US, NY
Dragula
I Live Here
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I Live Here
Joined: May 2004
Posts: 12,383
Taxes & Virus's R-US, NY
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Well, I have a couple of pretty good Thumper carbs on both of my cars. My issue like others, my one car is more of a show poodle and doesn't get run enough and at full temp at idle, its rich.. Lean the idle out, and the 605 won't cold start and idle at all. Our season here is short, and the outside temp swings a lot. The swing is big enough there is not a good way to balance it out. As the temp climbs, the AFR at idle gets worse. So far its in the 12.5ish range at 160 temp and worse when it climbs higher, yet cold, its 13.6, just barely enough to get it to idle at 50-60 degrees out. So I have been wanting one to help me cure cold starts. Been wanting one of the 4500 Snipers since I saw them come out last year....So I am watching this thread to see how this goes.
One thing I can't figure out is the other Holley, Stealth I think it is, comes with an external ECU and costs a bunch more. Not sure why the difference. I just like the 4500 TBI idea for us that need them..
Last edited by Dragula; 05/16/19 04:03 PM.
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Re: Holley sniper efi 4500
[Re: Dragula]
#2656145
05/16/19 10:41 PM
05/16/19 10:41 PM
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Joined: Jan 2003
Posts: 1,807
North Dakota
Azzkikrcuda
top fuel
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top fuel
Joined: Jan 2003
Posts: 1,807
North Dakota
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Terminator systems run a Holley HP Ecu. Ecu alone is $1000
The only Carbs I care about are under the hood!
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Re: Holley sniper efi 4500
[Re: avenger572]
#2656837
05/19/19 11:32 AM
05/19/19 11:32 AM
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Joined: May 2004
Posts: 12,383
Taxes & Virus's R-US, NY
Dragula
I Live Here
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I Live Here
Joined: May 2004
Posts: 12,383
Taxes & Virus's R-US, NY
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Well, hopefully it works out. I am very interested to see how yours works, especially the logging....I miss how efi cold starts and idles. My 1250 is pretty streetable, but it has to be tuned for the weather.
Last edited by Dragula; 05/19/19 11:41 AM.
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Re: Holley sniper efi 4500
[Re: Dragula]
#2657051
05/19/19 09:50 PM
05/19/19 09:50 PM
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Joined: Jun 2003
Posts: 9,225
Charleston
sixpackgut
Drag Week Mod Champion
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Drag Week Mod Champion
Joined: Jun 2003
Posts: 9,225
Charleston
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Well, I have a couple of pretty good Thumper carbs on both of my cars. My issue like others, my one car is more of a show poodle and doesn't get run enough and at full temp at idle, its rich.. Lean the idle out, and the 605 won't cold start and idle at all. Our season here is short, and the outside temp swings a lot. The swing is big enough there is not a good way to balance it out. As the temp climbs, the AFR at idle gets worse. So far its in the 12.5ish range at 160 temp and worse when it climbs higher, yet cold, its 13.6, just barely enough to get it to idle at 50-60 degrees out. So I have been wanting one to help me cure cold starts. Been wanting one of the 4500 Snipers since I saw them come out last year....So I am watching this thread to see how this goes.
One thing I can't figure out is the other Holley, Stealth I think it is, comes with an external ECU and costs a bunch more. Not sure why the difference. I just like the 4500 TBI idea for us that need them.. For DW2012, i pulled the sixpack top off my weiand tunnel ram, put on 2 edelbrocks, wired the chokes up and worked like a champ on cold startup. My copilot was joking the whole time that I turned my car into a Chrysler Cordoba.
Gen 3 power 6.22@110, 9.85@135
Follow @g3hemiswap on instagram
performance only racing, CRT, ultimate converter, superior design concepts, ThumperCarbs
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Re: Holley sniper efi 4500
[Re: sixpackgut]
#2657373
05/20/19 11:04 PM
05/20/19 11:04 PM
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Joined: Jan 2003
Posts: 27,421
Balt. Md
383man
Too Many Posts
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Too Many Posts
Joined: Jan 2003
Posts: 27,421
Balt. Md
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Hope you get it figured out. We just put the Holley Sniper on my sons Dart as its the 4150 model. Good for like 700 N/A hp and like 1200 boosted hp it says. But its been great so far as its been on the car for about a month now. Its been working good as we have been playing around with some of the settings and put the Sniper dist in it last week so the Sniper system now controls all timing. I like how you can put your own timing curve in it. Good luck to you with yours. Ron
Last edited by 383man; 05/20/19 11:04 PM.
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