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Thread: '55 Chevy with 454, going Sniper EFI.

  1. #1
    Join Date
    Jan 2018
    Location
    Holmen, WI
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    12

    Default '55 Chevy with 454, going Sniper EFI.

    Hi Guys. As mentioned in my intro, I have a '55 Chevy build that I have decided to go EFI late in the game. The engine is a mild 454 with Edelbrock Performer cam, heads & carb. Currently, ignition is an MSD distributor & 6AL (not digital) CD box. My plan is of course to lose the carb. I've sent my Rock Valley stainless gas tank back to be changed to their in-tank configuration with return line. I'm pulling driver side header to install weld in the WBO2 bung. Is there anything in the above info that I should or shouldn't do? Thank for any advice, as this is really new ground for me. Shoebox

  2. #2

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    Frankly this sounds like some serious hardware. If I had your car I would go with Terminator TBI instead. This uses the HP EFI computer, and "later" allows you MUCH more headroom for HP, features. Also, that computer can be used "later" if you go to MPFI. This by the way is coming from a "low buck" backyard type guy.

  3. #3
    Join Date
    Jan 2018
    Location
    Holmen, WI
    Posts
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    Default

    Hey 440, thanks for the response. There must be something to what you're saying as the Administrator has said, without giving specifics, that my thoughts of using Sniper EFI shows I have not done any research. What are the advantages of the HP EFI computer? It surprises me that the Sniper EFI computer is contained in the body, the Terminator has the rather large black box. I'm determined to make the right choice, just need to understand a lot more. I welcome any input & suggestions. Big thanks! Shoebox

  4. #4
    Join Date
    Dec 2009
    Location
    Connecticut
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    Quote Originally Posted by shoebox View Post
    There must be something to what you're saying as the Administrator has said, without giving specifics, that my thoughts of using Sniper EFI shows I have not done any research.
    My comment was not in reference to you using the Sniper EFI. It was in reference to you stating "I will be asking a bunch of (dumb) questions".

    What are the advantages of the HP EFI computer?
    https://forums.holley.com/showthread...9129#post69129 (Related Forum Thread - Read This!)
    May God's grace bless you in the Lord Jesus Christ.

    '78 BRONCO: 508" stroker, TFS heads, 11:1 comp ratio, Dominator MPFI & DIS, cold air induction, Spal dual 12" fans/aluminum radiator, dual 3" exhaust/Magnaflow mufflers, Moroso vacuum pump, Accusump, engine oil & trans fluid coolers, 100HP progressive dry direct-port NOS, A/C, LenTech Strip Terminator wide-ratio AOD/2500 RPM converter, 3:1 Atlas II, modified Dana 44/60-lockers-4.10s, hydroboost/4-disc brakes, ram-assist/heim joint steering, Cage long radius arms, traction bars, 4" Skyjacker lift, 35" mud tires

  5. #5
    Join Date
    Jan 2018
    Location
    Holmen, WI
    Posts
    12

    Default

    OK, I have spent the afternoon reading and watching videos here today and have learned a lot. However, just scraping the surface I'm sure. What I have not definitively found is why I should not use the SNIPER on this car. I get the impression that info is out there, but I'm still looking. I understand the HP EFI computer is "much more capable", but what does that mean? I know that it's a big box, I'd have to mount on an otherwise clean firewall. Now I'm not against upgrading, I do believe that "you get what you pay for". So odds are I could very well end up going with a Terminator setup. I just need to learn why I should. In the meantime, I'll continue studying! Any input, comments welcome. Thanks guys! Shoebox

  6. #6
    Join Date
    Dec 2009
    Location
    Connecticut
    Posts
    17,657

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    Quote Originally Posted by shoebox View Post
    What I have not definitively found is why I should not use the SNIPER on this car.
    I think you can use the Holley Sniper EFI, but of course, you have to make that final decision.

    I understand the HP EFI computer is "much more capable", but what does that mean?
    The Terminator EFI uses an HP ECU (LINK), so it has much more capability than the Holley Sniper EFI. Read the LINK to see if you really need the Terminator EFI features.
    May God's grace bless you in the Lord Jesus Christ.

    '78 BRONCO: 508" stroker, TFS heads, 11:1 comp ratio, Dominator MPFI & DIS, cold air induction, Spal dual 12" fans/aluminum radiator, dual 3" exhaust/Magnaflow mufflers, Moroso vacuum pump, Accusump, engine oil & trans fluid coolers, 100HP progressive dry direct-port NOS, A/C, LenTech Strip Terminator wide-ratio AOD/2500 RPM converter, 3:1 Atlas II, modified Dana 44/60-lockers-4.10s, hydroboost/4-disc brakes, ram-assist/heim joint steering, Cage long radius arms, traction bars, 4" Skyjacker lift, 35" mud tires

  7. #7
    Join Date
    Jan 2018
    Location
    Holmen, WI
    Posts
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    So I've read the complete thread regarding the operation of SNIPER (or TERMINATOR) on a dual-plane manifold. It seems the Edelbrock Performer dual-plane manifold (with no notch in the plenum) may work well, or maybe not with the 454 in my 55 Chevy. Considering the investment in changing to EFI, then using the "manifold that I have" is a mute point. What does Holley consider an ideal intake for a street driven (not race) big block, for overall driveability on the street?

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