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Old 05-07-2024, 03:54 PM
JLMounce JLMounce is offline
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Quote:
Originally Posted by Lee View Post
I would pay the extra and get a Terminator, if sticking with Holley. EFI is NOT the part of a project to go tight with the budget - you get what you pay for.

Also integrate the ignition system with it. A Dual-Sync distributor will give the ECU better (quality) and more (quantity) of information on what the motor is doing, which will make the system more effective. Also, by controlling the ignition, the system will run MUCH more smoothly.

I agree with JLM. There are a bunch of performance-guessers who "think" that throttle body efi systems "need" single plane intakes. Then there are people like JLM and myself who have actually tested, and found the truth.

The dyno chart attached shows my dyno testing, comparing a P4B vs a Torker II and a Holley Street Dominator. The motor details are in my signature below. I'm using FAST XFI Sportsman (basically an EZ 2.0 throttle body, but with a more powerful/tunable ECU) system, with ignition control.
I don't necessarily disagree with any of this here, but for casual users that likely won't put in the time to learn the software and get the most out of it, the Holley Terminator is wasted money. The standard Sniper is still good enough that it's going to beat an out of the box carburetor anyhow.

I also don't believe you can get the terminator in a spread bore pattern (as far as I know). I would still opt for an actual spread bore TBI over a square bore with an adapter.

I do agree however that if you're going to EFI of any kind, you're best off going with timing control as well. To the OP, while doing the conversion I'd definitely recommend getting Holley's hyperspark and dual sync distributor and set the system up for timing control. It just gets better at that point.

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1969 Pontiac Firebird