New 4150 style Sniper EFI

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You guys don't know what your'e missing. I had a Holley Pro-jection on one of my tool trucks. It was a 454 CHevy and the analog/non feedback set up was the 4 barrel 900 cfm unit. The control box was right next to the drivers seat so I could mess with the adjustments as needed. It worked pretty good.
 
If you have a big block Mopar I'd spend the extra $100 to get the 4150 style Sniper. The cables come out the back, the timed vacuum port is in the front, the throttle linkage lines up better with a stock bracket, etc. You do have to buy an external regulator so that adds some money and you might need a dual inlet type of feed so that might add some money depending on what you currently have for fuel lines.
Sb here. If i also have to get a $150 billet redulator, its deff not 250 cooler to me. Unless for a BB there is ECU issues with proximity to the dizzy
 
I was thinking about the mehasquirt but not sure if it's too advanced for me or not

What exactly are you hoping to achieve with EFI & most importantly; what is your budget? Camshaft profile? Would you rather have the ECU in the glove box or under the hood?
 
under the hood or glove box doesn't matter as long as it holds up.

Budget is subjective. If price gets too high I may as well go full modern hemi.

I want the easier starts and drivability for jamie when she drives it..

i want it to learn but also the ability to have it tuned and i want to be able to play with the timing from the driver seat...

in the end i have to do a fuel system no matter if i go just efi or modern hemi so thats a wash.. after that i'd like it simple but also able to build on as my knowlege with it grows.. id be learning efi from scratch....



the cam specs....

cam specs.JPG
 
under the hood or glove box doesn't matter as long as it holds up.

Budget is subjective. If price gets too high I may as well go full modern hemi.

I want the easier starts and drivability for jamie when she drives it..

i want it to learn but also the ability to have it tuned and i want to be able to play with the timing from the driver seat...

in the end i have to do a fuel system no matter if i go just efi or modern hemi so thats a wash.. after that i'd like it simple but also able to build on as my knowlege with it grows.. id be learning efi from scratch....



the cam specs....

View attachment 1715433508

I wouldn't consider anything but the Edelbrock Pro-Flo for a SBM, you get Fuel & Timing control [with an MPFI manifold] for $1900. You're still in it at least, another $300 for a dedicated fuel system. What makes more sense in terms of durability, an ECU mounted over your intake manifold or inside your glove compartment? Your camshaft profile is fairly mild, no issue with modern 'self learning' [base map tuning] EFI systems. Wouldn't take much on your part to make it a great driver.

Personally for me, I would be saving for a junkyard GEN III 5.7/6.4 Hemi with factory EFI using a Mopar controller and not look back. Drive the current SBM with a Holley 650 Brawler budget carburetor [or similar] & mechanical pump until that moment comes. That's just me though!
 
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Drive the current SBM with a Holley 650 Brawler budget carburetor [or similar] & mechanical pump until that moment comes. That's just me though!


been together for 5 or so years driving around with a 650 DP on it... fuel tank is 459 with pump,sender and straps. then the supply and return lines. not that they are a big deal... the sniper i can do for about 2200-2500 total.. and it also keeps the nostalgia of a stock looking car...

modern hemi i'm there just buying the motor and wire harness. then the fuel system (same 450 + lines) , exhaust, oil filter conversion, oil pan and i have to convert to manual steering. talking probably close to 5k with a running used motor...

DSC_0012.JPG
 
If you care about reliability, I'm not sure that aftermarket EFI with the ECU mounted above the manifold would be the solution in the long run [start researching the failure rates of long-term units].

As long as you understand these systems share no relation in durability to your modern daily driver [Holley, FiTech, or Edelbrock has zero liability unlike an auto manufacture] - then you're headed in the right direction. Timing control will net you better fuel economy, typically there is little change other than that, fuel curve swings a bit more wildly with your carburetor - but it makes little difference in power / MPG figures.
 
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