Bigger injectors for Terminator Stealth?

[BLstangin]

I was looking into the Terminator Stealth EFI for a Ford truck project that I'm building a 418W stroker for. I'm projecting 550-580 ft lbs & 550 HP. I'm afraid that I'm going to be at the edge of the horsepower rating of 600 HP, and if I upgrade the engine in the future I wouldn't be able to use the Stealth, as I would run out of injector. But in looking at additional parts on the website, I see that it shows 205 lb/hr injectors for it. Are these actually for the Stealth and if they are, are they a direct drop-in to replace the 80 lb/hr injectors that come with it? And how much HP would they support then? The engine has a very small daily driver cam in it, and I'm afraid a cam & intake change in the future would push the power up in the 650 range, and be too much for the 80 lb/hr injectors. Thanks for any input.

Also I forgot to ask, can the Terminator Stealth datalog, and is there any way to add an oil pressure & fuel pressure sensor to it?

[Danny Cabral]

And how much HP would they support then?

1300 HP @ 80% duty cycle.
1600 HP @ 90% duty cycle.

Also I forgot to ask, can the Terminator Stealth datalog, and is there any way to add an oil pressure & fuel pressure sensor to it?

Yes & yes.
The main harness is already wired for the fuel pressure transducer, but the oil pressure wiring would have to be added.
The Terminator/Stealth EFI systems use a Holley HP ECU. Please read the Terminator Stealth instruction manual (LINK).

[BLstangin]

OK, thank you Danny. Do you know which wiring I would need to add the oil pressure sensor and which sensor? Also, if I want to control timing, do I have to use the Ford TFI distributor as it says in the manual, or can I use the Holley Dual Sync Distributor?

[Danny Cabral]

OK, thank you Danny. Do you know which wiring I would need to add the oil pressure sensor and which sensor?

The oil pressure transducer is wired just like the fuel pressure transducer, except the oil signal wire is pinned into P1A-A20. Look at Figure 18, page 31 of the Holley EFI Wiring Manual (LINK); that's how the two pressure transducers are wired. Since it's a Holley pressure transducer, you can simply tap Sensor +5V & Ground off of the fuel pressure transducer. You don't have to run the sensor ground all the way back to pin A18 at the ECU. You can attach it to any sensor ground wire, anywhere in the main harness.

Also, if I want to control timing, do I have to use the Ford TFI distributor as it says in the manual, or can I use the Holley Dual Sync Distributor?

You obviously haven't searched this forum. Yes, you can use the Holley Dual Sync Distributor. It's now the most popular distributor used.

[BLstangin]

You obviously haven't searched this forum. Yes, you can use the Holley Dual Sync Distributor. It's now the most popular distributor used.

Sorry I asked. At the PRI booth, I got told that the Stealth was not upgradeable and 600 HP was the max. Then I saw the injectors on the website which confused me, because at PRI I was clearly told that they didn't have a bigger injector for them as it was a direct question I asked. I called the Tech Line and sat on hold 15 minutes 3 times yesterday, and gave up. Also in the link you gave me for the Stealth instructions, it says timing control can ONLY be used with GM small cap or Ford TFI distributors, ALL OTHERS must use a distributors with mechanical advance. How would I know for sure if it works any other way, when it says clearing in your instructions that it doesn't? That is why I asked.

Quoted directly from the instruction in link you provided: "Next, you need to select whether the ECU will be controlling the ignition timing (Figure 15). Select “Yes” ONLY if you are using a GM small cap computer controlled HEI distributor or Ford TFI distributor. These are the only ignition distributors that allow the ECU timing control using the TERMINATOR STEALTH™ system. All other ignition/distributor types must be a standard mechanical advance type used on any carbureted application. If you select “Yes”, proceed to step 10. If you select “No”, proceed to step 11." This is why I was confused.

[Danny Cabral]

Oops sorry. I forgot you have the Stealth version of the Terminator EFI. Yes, the Terminator Stealth is only compatible with Ford TFI or GM small cap HEI. The regular Terminator EFI can use the Holley Dual Sync Distributor.

[BLstangin]

Just want to clarify, the STEALTH can use the bigger injectors still correct? And one last question, can I use the Dual Sync with the Stealth, if I download the EFI software & laptop tune it, or is it still not compatible? Thanks for your help.

[Danny Cabral]

Just want to clarify, the STEALTH can use the bigger injectors still correct?

Yes, if you can replace the different injector connectors (LINK & INFO).

And one last question, can I use the Dual Sync with the Stealth, if I download the EFI software & laptop tune it, or is it still not compatible?

Yes, because the Terminator Stealth uses an HP EFI ECU. However, this will require a custom distributor wire harness,
from the Holley Dual Sync Distributor 10-pin Delphi Metri-Pack 150 connector, to the P1A-A10/A14/A30 ECU connector.
If you have a lot of questions about this, and/or you're not proficient with wiring, I'd rather not get into it on the forum.

Here's some information. The Hall-Effect crank sensor is wired as shown in the Holley EFI Wiring Manual:
http://documents.holley.com/techlibr...10555rev17.pdf (Holley EFI Wiring Manual - Figure 11 & 18, Page 20 & 31)
http://forums.holley.com/showthread....als-Holley-EFI (Holley EFI ECU Connectors & Terminals)
http://documents.holley.com/199r10977rev.pdf (Holley EFI 565-101 Dual Sync Distributor Instructions)
http://forums.holley.com/showthread....ing-Holley-EFI (Ignition Timing Synchronization)

Thanks for your help.

You're welcome.

[Ryan W.]

The 205 lb/hr injectors will physically fit in the Stealth, however, the 205 lb/hr injectors have a different connector than the standard 80 lb/hr units. Which means you can't just plug them into the current harness. There is not yet a direct fit harness available for the Stealth throttle body with proper 205 injector connectors either. So the people at PRI were technically right to say the 205s are not compatible, since we do not currently have a complete plug & play solution available for purchase.

I will see what I can do to make our website more accurate & descriptive about this going forward. I can see how it's misleading & confusing currently.

To your original point of needing more fuel though, if the injectors are just a little small and you will be tuning with the laptop and not the handheld, you can turn up the base fuel pressure to gain a little head room on the injectors.

[Danny Cabral]

I will see what I can do to make our website more accurate & descriptive about this going forward. I can see how it's misleading & confusing currently.

If you want suggestions, give me a call!

[Ryan W.]

LOL. If you still have my email, send over what you have. I'll do what I can.

[BLstangin]

So if I get the right connectors, I could make a harness in the future, correct?

[Danny Cabral]

Yes, but it will probably be available by then. It's already available for the regular Terminator EFI (LINK & INFO).

[micktempe]

Hello, can we use E85 with these new injectors?

[Danny Cabral]

Yes: http://documents.holley.com/flyer_te...i_brochure.pdf (Pages 5, 6 & 10)