Re: New 4150 style Sniper EFI
[Re: MichaelF]
#2719653
11/27/19 08:44 AM
11/27/19 08:44 AM
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Joined: Jan 2003
Posts: 8,018 Tulsa OK
Bad340fish
master
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master
Joined: Jan 2003
Posts: 8,018
Tulsa OK
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How does the "carb style" effect the cost? IMO this is the way they should have come to market with the sniper. It looks really good which is hurdle that lots of people couldn't overcome about the throttle body systems.
Last edited by Bad340fish; 11/27/19 10:27 AM.
68 Barracuda Formula S 340
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Re: New 4150 style Sniper EFI
[Re: Bad340fish]
#2719676
11/27/19 10:25 AM
11/27/19 10:25 AM
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Joined: Sep 2007
Posts: 1,890 Spahn Ranch
RMCHRGR
top fuel
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top fuel
Joined: Sep 2007
Posts: 1,890
Spahn Ranch
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IMO this is the way they should have to market with the sniper. It looks really good which is hurdle that lots of people couldn't overcome about the throttle body systems. Agreed! I would have preferred mine to look like a 4150 instead of a weird, anodized Thermoquad pancake looking thing!
'71 Duster '17 Ram 1500
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Re: New 4150 style Sniper EFI
[Re: BradH]
#2719732
11/27/19 01:28 PM
11/27/19 01:28 PM
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Joined: Jan 2003
Posts: 15,439 Val-haul-ass... eventually
BradH
Taking time off to work on my car
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Taking time off to work on my car
Joined: Jan 2003
Posts: 15,439
Val-haul-ass... eventually
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Holley says 870 CFM; 650 HP NA with 4 100# injectors. It would be interesting if they come out with a bigger 4150 Stealth model. I like this style better than the original Sniper design, although I don't know if they're functionally equivalent. Is that a 1-to-1 linkage, or progressive?
Last edited by BradH; 11/27/19 01:29 PM.
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Re: New 4150 style Sniper EFI
[Re: justinp61]
#2719785
11/27/19 03:47 PM
11/27/19 03:47 PM
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Joined: Jan 2003
Posts: 30,989 Oregon
AndyF
OP
I Win
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OP
I Win
Joined: Jan 2003
Posts: 30,989
Oregon
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Do most of these bolt on FI units still have issues with large cams that produce low vacuum? Just depends on how low the vacuum is. If vacuum at idle is really low then you have to run open loop at idle and go closed loop at 1500 or 2000 rpm. The Sniper doesn't have any problem handling race cams or even open headers but you have to adjust the tune. The out of the box tune won't work. If you know what you're doing it only takes a few minutes to dial in the tune. If you don't know what you're doing then it could take much longer.
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Re: New 4150 style Sniper EFI
[Re: AndyF]
#2719828
11/27/19 06:02 PM
11/27/19 06:02 PM
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Joined: Jan 2003
Posts: 15,439 Val-haul-ass... eventually
BradH
Taking time off to work on my car
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Taking time off to work on my car
Joined: Jan 2003
Posts: 15,439
Val-haul-ass... eventually
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I would expect that they'll release a version with the 120 lb/hr injectors which is what you would need for your engine. I don't have any inside info but it just makes sense for them to do that. The linkage is 1:1 out of the box. It can be changed over to progressive but then the unit has to be reprogrammed. I run mine in 1:1 mode. I tried progressive but decided to go back to 1:1 linkage. I'm trying to imagine driving on the street, staging, and launching off a foot-brake using a 1-to-1 linkage...
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Re: New 4150 style Sniper EFI
[Re: AndyF]
#2719839
11/27/19 06:47 PM
11/27/19 06:47 PM
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Joined: Oct 2003
Posts: 11,684 W. Kentucky
justinp61
I Live Here
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I Live Here
Joined: Oct 2003
Posts: 11,684
W. Kentucky
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Do most of these bolt on FI units still have issues with large cams that produce low vacuum? Just depends on how low the vacuum is. If vacuum at idle is really low then you have to run open loop at idle and go closed loop at 1500 or 2000 rpm. The Sniper doesn't have any problem handling race cams or even open headers but you have to adjust the tune. The out of the box tune won't work. If you know what you're doing it only takes a few minutes to dial in the tune. If you don't know what you're doing then it could take much longer. I'd be in the second category. LOL
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Re: New 4150 style Sniper EFI
[Re: BradH]
#2719842
11/27/19 07:01 PM
11/27/19 07:01 PM
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Joined: Sep 2014
Posts: 4,457 Washington
madscientist
master
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master
Joined: Sep 2014
Posts: 4,457
Washington
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I would expect that they'll release a version with the 120 lb/hr injectors which is what you would need for your engine. I don't have any inside info but it just makes sense for them to do that. The linkage is 1:1 out of the box. It can be changed over to progressive but then the unit has to be reprogrammed. I run mine in 1:1 mode. I tried progressive but decided to go back to 1:1 linkage. I'm trying to imagine driving on the street, staging, and launching off a foot-brake using a 1-to-1 linkage... I used to convert all my carbs to 1:1 linkage. The one I'm using now isn't, but it's just a linkage adjustment. And soon, it will be 1:1 as well, I just need to do some other stuff first.
Just because you think it won't make it true. Horsepower is KING. To dispute this is stupid. C. Alston
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Re: New 4150 style Sniper EFI
[Re: BradH]
#2720773
12/01/19 08:45 PM
12/01/19 08:45 PM
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Joined: Jan 2003
Posts: 14,491 So. Burlington, Vt.
fast68plymouth
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 14,491
So. Burlington, Vt.
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I would expect that they'll release a version with the 120 lb/hr injectors which is what you would need for your engine. I don't have any inside info but it just makes sense for them to do that. The linkage is 1:1 out of the box. It can be changed over to progressive but then the unit has to be reprogrammed. I run mine in 1:1 mode. I tried progressive but decided to go back to 1:1 linkage. I'm trying to imagine driving on the street, staging, and launching off a foot-brake using a 1-to-1 linkage... I recently programmed a tune for my friends Charger with the non-stealth style of Sniper on a 446 with a 6 speed. The one-to-one linkage was a non-issue driving the car around in traffic with his combo.
68 Satellite, 383 with stock 906’s, 3550lbs, 11.18@123 Dealer for Comp Cams/Indy Heads
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