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EFI vs. Carb fuel system, is EFI really 'that much' more expensive?

Best value for the investment cost?

  • TBI EFI

    Votes: 13 65.0%

  • CARB

    Votes: 7 35.0%
  • Total voters
    20
The big advantage here is for cars that make over 650 HP with EFI. We haven't discussed that but this is when carbs get really expensive and tuning is critical.

Holley sells the Super Sniper 4150 (1,250 HP capable - $1,500) & Stealth 4500 (1,500 HP capable - $1,700). Turbo applications, E85 street applications, blower applications, nitrous applications; it doesn't really matter. Paired with their Hyperspark ignition, the Holley EFI system manages (safe) timing and fuel tables.
 
We need a daily driver thread. 1500 hp? Motivation for efi for me is drivability, reliablility, keeping fuel cool, adjustments for high ambient temps and elevation.

$3300 so far between the tank and the efi. Project in progress.
 
I street dive my heap over 1000 miles a year.How much are the twin throttle body set ups? I have well over $2k into my Racepak:realcrazy:
 
Here’s a killer RB direct port injection system.
Using a Holley HP controller.

D54BB9EE-2B68-4B6E-8E32-F2F77D22E557.jpeg 0BFBB580-3B0D-40CA-A309-8A4BD72ACB58.jpeg
 
Is the super sniper only for boost applications? I see they offer the stealth 4500 now which looks awesome, but it seems you either have to make less than 650hp or at least 800 N.A. to use one of their systems. Also the notes say not to use race gas? Why has fitech been able to make a unit that supports 250-1200hp N.A. but Holley cannot
 
Local tuner says he gets about 50 hours run time on a pair of O2 sensors with race fuel and about 500 hours with unleaded pump swill.
 
1967coronet440 said:
Is the super sniper only for boost applications? I see they offer the stealth 4500 now which looks awesome, but it seems you either have to make less than 650hp or at least 800 N.A. to use one of their systems. Also the notes say not to use race gas? Why has fitech been able to make a unit that supports 250-1200hp N.A. but Holley cannot
Click to expand...

No, you can run N/A with all the kits. The Super Sniper series basically support Forced Induction with a 2.5-BAR map sensor (run up to 21.5# boost) and have a few other features. The 4150/4500 versions have (8) 100 lb/hr injectors.

The standard Sniper has a 2-BAR map sensor. Yes, theoretically they can support up to around 14# boost, until the engine maxes out the fuel system.

The Super Sniper 650 can support 650-HP N/A & 650-HP F/I (800 CFM throttle body) (400 lb/hr)
The Super Sniper 4150 can support 700-HP N/A & 1,250-HP F/I (800 CFM throttle body) (800 lb/hr)
The Stealth 4500 can support 1,500-HP N/A & 1,250-HP F/I (1,440 CFM throttle body) (800 lb/hr)

Leaded fuels kill 02 sensors, better off with E85.
 
Last edited:
Sweet5ltr said:
No, you can run N/A with all the kits. The Super Sniper series basically support Forced Induction with a 2.5-BAR map sensor (run up to 21.5# boost) and have a few other features. The 4150/4500 versions have (8) 100 lb/hr injectors.

The standard Sniper has a 2-BAR map sensor. Yes, theoretically they can support up to around 14# boost, until the engine maxes out the fuel system.

The Super Sniper 650 can support 650-HP N/A & 650-HP F/I (800 CFM throttle body) (400 lb/hr)
The Super Sniper 4150 can support 700-HP N/A & 1,250-HP F/I (800 CFM throttle body) (800 lb/hr)
The Stealth 4500 can support 1,500-HP N/A & 1,250-HP F/I (1,440 CFM throttle body) (800 lb/hr)

Leaded fuels kill 02 sensors, better off with E85.
Click to expand...
So someone like me for instance that’s about 700hp N.A. I wouldn’t be able to use the stealth 4500 correct? It says at least 800-1500.
 
Dennis H said:
We need a daily driver thread. 1500 hp? Motivation for efi for me is drivability, reliablility, keeping fuel cool, adjustments for high ambient temps and elevation.

$3300 so far between the tank and the efi. Project in progress.
Click to expand...


Is it running yet?? Is it running yet??? LOL
 
1967coronet440 said:
So someone like me for instance that’s about 700hp N.A. I wouldn’t be able to use the stealth 4500 correct? It says at least 800-1500.
Click to expand...

Well, the more informed you are the better. Stealth 4500 uses 2.125-inch throttle plates and the Sniper series uses 1.6875-inch throttle plates. For a street car, where low-speed throttle response is important, you can understand why they placed the rating the way they have.

Lets put it this way, 440 six-pack, 390-HP, 1,350 CFM worth of air-flow at WOT. Drove around perfectly on the inboard.

I would give Holley a call if you're seriously considering any of the above kits.
 
People who don't like the hassle of tuning a carb will vote EFI, those who have put in the effort and cruise happily with a carb will vote carb. People can say whatever they want but a properly tuned carb works just fine.
 
Sweet5ltr said:
Well, the more informed you are the better. Stealth 4500 uses 2.125-inch throttle plates and the Sniper series uses 1.6875-inch throttle plates. For a street car, where low-speed throttle response is important, you can understand why they placed the rating the way they have.

Lets put it this way, 440 six-pack, 390-HP, 1,350 CFM worth of air-flow at WOT. Drove around perfectly on the inboard.

I would give Holley a call if you're seriously considering any of the above kits.
Click to expand...
Thanks for the explanation, I currently have a fitech 1200 which is a nice unit but I like the Holley software much better so I’m considering making a switch.
 
Just switch, you’ll thank me/yourself later. Sell the Fitech to some unsuspecting loser, er, person. Lol!!!

The Holley is sooo far out in front of Fitech, it’s like comparing a Super model to some old hag.

I’m just kidding with the above, but the Holley is more tunable and has more options. Hell, I’m starting to be able to understand this stuff and it’s really all Greek to me.
 
747mopar said:
People who don't like the hassle of tuning a carb will vote EFI, those who have put in the effort and cruise happily with a carb will vote carb. People can say whatever they want but a properly tuned carb works just fine.
Click to expand...
I paid Close to $2500 for 2 SV1 carbs and about the same for the racepak.I had to do it in steps due to the expense.But weather and DA have much to due with the tune then throw different boost levels into the mix..I also found the outer limits of my 4 inch exhaust system .
Wish I had a self adjusting EFI system!



Carlisle 1018 008.jpg Carlisle 1018 009.jpg Carlisle 1018 010.jpg Carlisle 1018 011.jpg Carlisle 1018 013.jpg Carlisle 1018 017.jpg
 
5.7 hemi said:
Just switch, you’ll thank me/yourself later. Sell the Fitech to some unsuspecting loser, er, person. Lol!!!

The Holley is sooo far out in front of Fitech, it’s like comparing a Super model to some old hag.

I’m just kidding with the above, but the Holley is more tunable and has more options. Hell, I’m starting to be able to understand this stuff and it’s really all Greek to me.
Click to expand...

Zack, Zack, Zack... You know what they say, "a little information is a dangerous thing". You're pushing my buttons: Besides, I like my "old Hag"...Like you, I'm 'just kidding'.
 
5.7 hemi said:
Just switch, you’ll thank me/yourself later. Sell the Fitech to some unsuspecting loser, er, person. Lol!!!

The Holley is sooo far out in front of Fitech, it’s like comparing a Super model to some old hag.

I’m just kidding with the above, but the Holley is more tunable and has more options. Hell, I’m starting to be able to understand this stuff and it’s really all Greek to me.
Click to expand...
I hope by the time I get mine together you'll be a guru with the Terminator so I can bug you with all my questions...don't see Brian around much anymore....
 
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