[yellow1098]

Soooo one more time just to simplify this question.....so I buy the universal terminator x package for 1k right? Which throttle bodies can I use? Specifically Holley throttle bodies.......also.....as far intake choice....butler suggests the viktor efi intake...what differences would I see from a modified northwind.....what else do I need?

Also like I said my current setup is Holley sniper....can I run my current fuel pump and fuel tank setup? Thanks again!

[darbikrash]

You can likely use the current fuel system as long as it is properly sized for your HP level, but keep in mind you will need a return style fuel regulator.

There is a link in Post 13 of this thread for a Holley throttle body that will work.

I would call the Holley tech support line and ask for their help in compiling a complete parts list- you're going to need a lot of stuff.

[HWYSTR455]

The 4150 1000cfm TB from Holley should work fine.


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[Steve C.]

"I would call the Holley tech support line and ask for their help in compiling a complete parts list.."

That's what I did May of 2016 and Holley FI Tech suggested the following for my current 505 application. I told them about the engine which at the time made 660 hp at 5900/6000 rpm on the dyno, the type of street driving I did and that it was not raced. They suggested the parts below. I purchased the parts from Paul Knippen ( Paul K here on PY ). Pauls pricing was VERY competetive and the parts were dropped shiped to me by Holley Performance Products.

HP EFI Universal MPI Retrofit Kit, 4150 carburetor style intake manifolds
48 LB/HR PERFORMANCE FUEL INJECTORS
HOLLEY EFI DUAL SYNC DISTRIBUTOR

I sent my Victor intake to a shop and they installed the injector bungs and mounted the fuel rails. We have a friend that runs a local performance shop that was familiar with the system and he helped with the initial programming.

All works fine with no issues.


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[yellow1098]

Thanks Steve I will try to find and get ahold of him....you don’t happen to have his contact info do you? Is Paul a Holley employee/rep?

How did the viktor and setup work with your hood and shaker?

[HWYSTR455]

Edelbrock makes 3 EFI ready intakes, 1 based on a Torker II (4150), and 2 Victor based (4150 & Dominator flange).

Rails & brackets are available from Edelbrock as well.

The T2 intake care needs to be taken when selecting a throttle body, some have linkage interference. Mild doctoring of the intake corrects this.

The Hurricane intakes come with injector pads that can be drilled, but you would need rail mounts fabricated.

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[Steve C.]

My Holley contact at the time was Jeff Teel. My initial contact was via e-mail at Holley.Com. But later we communicated via phone on the specific details.

I used my old Victor intake that had no provisions for injector bungs. That and it was port matched to the tall ports on my cylinder heads. I used the 4150 style throttle body which at the time was actually taller than the 4500 Holley unit.

Regarding hood issues it's a bit different for me, I have a factory shaker scoop molded to a fiberglass hood. I run a 9-inch dia K&N filter w/ X-stream filter top that sticks up inside the hood scoop. From a distance it looks close to being 'stock', pictured here:

https://www.hotrod.com/articles/0712...ImageId=243959

Paul Knippen runs Muscle Motors in Sugar Grove, Ill and posts here on PY. He can sell Pontiac parts at very good prices in addition to doing engine work and cylinder head porting.
He knows his stuff ! And good to deal with.... this all said, I hear rumors he might be moving to our great state of Texas


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[yellow1098]

So I called Holley yesterday and of course the guy I spoke with had no clue about any technical questions....he word for word said ....I would just go with the bigger Holley Sniper there is to much involved for you to go multiport......the terminator x is more for LS engines.......

[Formulajones]

lol

[Steve C.]

I spoke with Jeff R. Teel

Technical Support at Holley Performance Products , Inc.
(270) 782-2900

But again this was in 2016. You can give it a shot, however he has also been doing events as a PR coordinator for Holley Performance Products involving their TERMINATOR STEALTH FUEL INJECTION.

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[darbikrash]

Not just for LS:


[/url]

Parts list for what you'll need to convert to MPFI:



Not cheap!

[HWYSTR455]

You can flash the ECU you have and just get the universal multiport harness & injector harness, will save you like $600. You probably already have a bypass regulator. Or should.

But you could probably get more if you sell the whole kit and just get the Terminator X. Nice thing about the Terminator X is most of the tuning can be done via the handheld. Once you flash the one you have, you HAVE to use a laptop to tune.

Those prices shown are list prices, some of the items are much less. But even with what you have you will still probably be over $2500 to go multiport.

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[yellow1098]

Thank you fellas! And that list is golden!!!!!!! 48lb injectors are the size to go with?

[darbikrash]

Originally Posted by yellow1098

Thank you fellas! And that list is golden!!!!!!! 48lb injectors are the size to go with?

They are rated by Holley at 765 HP MAX.The next smallest Holley branded injector is 42 lbs/hr rated (again by Holley) at 670 HP.

[yellow1098]

Ok yet another question ...I saw on the list the intake listed was Torker 2.......but what was suggesting by Butler was the Victor ...both are efi ready.....which is the better choice? Does one allow for more power or more clearance?

[darbikrash]

Same thing. I don't know why, but what Edelbrock calls the "Victor" is a Torker II with EFI bungs. So its the same manifold. The "Super Victor" is much taller.

Butler is recommending the same manifold as in the parts list. I'd order it with their fuel rail kit #3637.

[yellow1098]

Here is where that confuses me.....butler has 2 different efi Edlebrock intakes the torker 2 efi 50565 and the Victor EFi 29575.......the difference it looks like is the separate piece for the water neck like my northwind.....

https://butlerperformance.com/search.html?q=Efi+intake

Thanks again!

[yellow1098]

Well I figured out the difference ........and I know you some of you guys spoke to this a bit and said your MPFI cars are more fun to drive but Holley and Butler now are pushing me towards the newer Holley Xflow unit which is still a TBI.....saying there isn’t much real world difference....can you guys give me the real world difference? Again I do a lot more street driving than track runs......thanks as always

[Formulajones]

Like I mentioned before, I'd just go with the throttle body unit and call it done for what you're doing. Holley and Butler seem to agree.

Multiport injection is nice, I liked the tunability I had with the factory ECM's tuning the LS engines we owned, but for me as far as classic cars are concerned, when it comes to retrofitting something, I'd rather have the simplicity and clean appearance of a throttle body unit, let it self tune and be done with it. Of course being half the cost is a nice bonus too.

I've worked a few, and swapped to throttle body efi for others. I've never heard anyone say they didn't like it. Most of them can't tune a carb so major improvements and drivability were found. Helped with one for a 57 T-bird still running the 312 Y-block engine with a factory carb that isn't easy to find parts for and even harder to tune if you don't know your way around those things. The holley throttle body EFI swap turned it into a fantastic running car. I also did an overdrive swap on that one and now he finds himself driving the car all the time.

[Scott65]

Having been where you are, I'd start out with an ECU that will do anything, and leave myself room to "grow". I started with a tbi style, and it worked well. But when I decided I wanted sequential fuel/spark I had to buy a new system that would handle that. With that in mind, pick an ecu that will do anything you think you'll ever need. The good ones will run a tbi system or mpfi. You can start with one and step up when you want to. This is provided you're like most of us, and always looking for more eventually. If you know for sure that you're gonna build it once and never ever change it then bolt on whatever meets your power needs and drive it.