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#1 shags

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Posted 10 June 2021 - 06:21 PM

who has used an after market fuel injection system like holley sniper efi and the likes.

looking for options away from the old holden 5ltr bunch of bananas .

 

i like the carby look.

 



#2 yel327

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Posted 10 June 2021 - 06:40 PM

I have bought a Sniper and a Hyperspark for the 377 going into the HK, but haven’t actually used it yet. I’ve fitted a VZ MRA (dead head type) into the HK fuel tank and was starting to bend up new 3/8” fuel line but life/COVID/other stuff has delayed me for a while.
I bought a gold Sniper Quadrajet as I like the Quadrajet sound plus a Corvette drop base factory replica air cleaner will fit it. I bought most of it when EBay was having 15% or 20% off days of local sellers like Rolan, Outlaw etc.
The whole hog is:
Sniper kit
Hyperspark dizzy
Hyperspark coil
Coil firing module.

It is all plug and play and looks really easy to setup. The hardest work appears to be getting the fuel tank and pump right. If you go to the Sniper page on the Holley website you can download the fitting and commissioning documents, and it shows you how the whole lot works and connects together. It also shows you it can work with an MSD distributor or a HEI just not as tuneable. The little LCD screen that comes with it allows you to set up a base tune and then dyno it giving you full fuel and spark maps. There are also forums where you can ask questions of both Holley people and other users. I’m also going to use my Sniper to control the lockup converter on my TH350C.
Going to set it all up initially on a 283, get the whole car functioning including the A/C and then replace the engine with the 377.

#3 LJ RB30

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Posted 10 June 2021 - 10:53 PM

I bought the EZ-EFI master kit years ago (they look abit different now) & fitted it to the 253 in my HJ.

The self learning was a big seller for me.

Took me a while to fit it as work kept me busy.

Powered up & run through basic settings,ci, No of cyl, idle speed & some afr settings from memory then hit the key & it fired up straight away!

I was wrapped! :clappin:  :clappin:  :clappin:

Even with the huge throttlebody (1000cc) it ran perfectly, accelerated smoothly under all conditions.

About the only frustration i had was the slow responding hand controller.

I didn't get to use it much over the next 12-18 months.

I tidied up some bits then drove it more.

While out driving i decided to clear it & start the learning again as i was planning on driving it more.

When i got home & was sitting in the shed idling & i was scrolling through the (f#%king slow) hand controller looking at settings & accidentally went into calibration mode (whats normally done before initial start up) & there was no backing out.

I got to the throttle calibration section & wasn't going to do WOT so i turned the ignition off.

It never ran properly again.

It only ever tried to start with throttle full ,anything under that it did nothing.

Inputs on the controller from intake air temp & coolant temp were now showing 255. These are not able to be altered/calibrated from any operator inputs!

I googled it & found another aussie had the same issue & had sorted it with the manufacturer but wouldn't say how. 

This to me definitely seem to be a manufactures programming glitch.

I had the setup for over 2 years but only done 50klms with it.

I contacted the manufacturer & they wanted me to send the computor back to be reflashed at my cost of $666US not including postage!!

I said that (at the time) it was going to cost me $950AU without postage when i payed $2400AU for the whole kit!

They weren't very helpful so in frustration i rebuilt  the quadrajet & went back to that.

They may have fixed the issue but i certainly wouldn't recommend them.

Rant over



#4 76lxhatch

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Posted 11 June 2021 - 05:41 AM

Throwing away the port injection for a basic throttle body injection system seems like a bit of a backwards step... why not just change the manifold and use a four barrel throttle body?

 

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#5 LJ RB30

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Posted 11 June 2021 - 11:32 PM

Throwing away the port injection for a basic throttle body injection system seems like a bit of a backwards step... why not just change the manifold and use a four barrel throttle body?

 

Certainly agree it would be a backward step if already had port injection.



#6 Bigfella237

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Posted 12 June 2021 - 08:02 AM

 ~ i like the carby look.


It will cost you a little extra but if you really like the carby look then you can't get much better than a Holley Terminator Stealth EFI setup...

 

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https://www.holley.c...inator_stealth/



#7 shags

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Posted Yesterday, 12:48 AM

cool thanks for the info.

 

im starting from scratch on my old hz ute has a 5ltr th400 carby fed.

 

i have a whole vt calais but its more hassle ans cash to get all that fitted and tuned than buying a self tuning system.

 

the stealth would be nice but might but im gunna budget a bit lower recon the sniper kit will be the go.



#8 axistr

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Posted Yesterday, 09:08 AM

I have had a Holley HP system on my hatch SBC 383 for around four years now. Runs so much better than the 780 Holley carby ever did. Easy setup, configured it in a few minutes on my laptop, self tuned in a quick 20 minute drive. Only made a few  minor changes to suit my driving style. Used a standard HEI distributor. Engine is around 500 HP. I can lean in through the window, turn the key and starts up perfect hot or cold and will idle all day. There are heaps of extra things the computer can control, fans, AC, transmissions (auto) mine is a manual, nitrous and the list is very long. I can drive the car and do a full logging or just monitor all the parameters on the screen in real time on many different user custom screens. Highly recommend the Holley HP MPFI system. 

 

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#9 yel327

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Posted Yesterday, 10:13 AM

^^I would one day like to tinker with like above, maybe when I get the time to build a BBC up. For the current HK the Sniper will be a good start, and you are right they are relatively cheap. You can buy a base kit in a squarebore for about $1700, if you wait for an EBay 10-15% off day even better. The Quadrajet one will take a standard air cleaner but with the squarebore you have to modify it or use aftermarket. Holley sells an A/C base that fits.
I chose to dead head mine so running without a return line. The squarebore Sniper has an inbuilt regulator, my spreadbore one doesn’t so I have to run a regulated MRA. I’d recommend you do the same, pull your tank out and get an MRA ring added. Use whichever MRA suits the tank depth. The common ones are VT-VY for tall tanks, BA-FG for medium height and VE for shallow tanks.
If you are running less than 350-400hp it looks like the standard 5/16” fuel line will do but upgrade to 3/8” if you go more just to be safe.





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