Anyone ever used Stack Injection ITB setup?

A lot of people have used this unit in Australia. It is the old DC & O manufactured unit and has always been good quality. I believe EFI hardware in Melbourne do the machining and assembly on them which is great as they are a really reputable company.

The US guys have used the same system sourced under a different branding from a US rep that does tuning as well.

For the ECU, I'd go for the Haltech elite 950.. It is a current ecu where as the sprint 500 is now older tech.
 

Chris

Supporter
A lot of people have used this unit in Australia. It is the old DC & O manufactured unit and has always been good quality. I believe EFI hardware in Melbourne do the machining and assembly on them which is great as they are a really reputable company.

The US guys have used the same system sourced under a different branding from a US rep that does tuning as well.

For the ECU, I'd go for the Haltech elite 950.. It is a current ecu where as the sprint 500 is now older tech.
Thanks for the reply.
Do you know which branding it’s under in the US?
 

Bill Kearley

Supporter
Not trying to promote it but is Borla an option, I have it and seems to be fine. I'm using Holley controls.
Quite expensive in Canada.
 

Chris

Supporter
Not trying to promote it but is Borla an option, I have it and seems to be fine. I'm using Holley controls.
Quite expensive in Canada.
It’s not off the table. Think I prefer the classic Weber style Eight Stack that they also sell.
Have messaged Jim Inglese for Costa for his units too.

I just came across the Stack Injection setup and seems pretty cheap in comparison. So thought I’d see whether anyone knew if they were any good.
I’m UK based so they’re all expensive for me, joyful, however I get extremely cheap flights to the US etc so I could go and pick them up and save a fortune on import etc.
 

Bill Kearley

Supporter
You will enjoy the 8 stack no mater what, Mine starts and runs well without any drivability issues.
I had to fine a programmer that knew what he was doing and all was great.
 
If you will notice the injectors are on the outside pointing to the inside wall and away from the port. Thus the liquid fuel just hits the wall and messes up any atomization you had. The Borla and some others have the injectors on the inside pointing right down the inlet port. Further I heard a rumor that there was a supplier from China that had that outside-in configuration and were of poor quality. I don't know if this is the same system. I used the Borla and it is very high quality.

Bob Woods
Tornado GT40 in Texas
 

Chris

Supporter
If you will notice the injectors are on the outside pointing to the inside wall and away from the port. Thus the liquid fuel just hits the wall and messes up any atomization you had. The Borla and some others have the injectors on the inside pointing right down the inlet port. Further I heard a rumor that there was a supplier from China that had that outside-in configuration and were of poor quality. I don't know if this is the same system. I used the Borla and it is very high quality.

Bob Woods
Tornado GT40 in Texas
This is a very good point! That will completely ruin the atomisation.
Another one bites the dust :)
 
I have successfully used a couple of the Speed Master systems on a couple of customers Cobras. These are a Chinese manufactured knock off of the Inglese / Borla inside mounted fuel rail systems. They work OK but quality can vary batch to batch so you have to be careful.

I had an Inglese / Borla system on my old Daytona coupe and to be honest it was not a huge amount better than the Speed Master unit. Particularly given the significant $$ difference.

My GT40 has a DC&O unit and has been faultless since i installed 14 odd years ago. Inside mounted rails weren't available way back when I set it up and it is not as nice from an emissions point of view, but it has served really well and is sure as heck heaps easier to work on without the rails obstructing the cable pulley and linkages, etc, when it comes to balancing the system.
 

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Chris

Supporter
Looks awesome!

I’m waiting to hear back from Jim Inglese about costs in his systems for what I’m after.
Glad to hear you’ve been able to make all of the intakes work without too much difference between them. Crazy how the price differs though.
The DC&O trumpets seem to fit really low compared to the speedmaster/borla in the cobra. What are the two engines? Both 302 based?
 

Jasper

Supporter
This is a very good point! That will completely ruin the atomisation.
Another one bites the dust :)
I believe with fuel injection, the atomization is to enhance the evaporation of the fuel. You don't actually 'inhale' the atomised droplets, cos they going to hit your valve or another piece of cast ally/steel somewhere. That's also why you enrich your mix during cold starts, there is not enough heat in the castings to evaporate all your fuel yet.
I woudn't be to worried about the injection angle/direction, your tune will definitly be able to correct for the differences. (You tune cold-start conditions differently depending on 'wall wetting' parameters.
 
I believe with fuel injection, the atomization is to enhance the evaporation of the fuel. You don't actually 'inhale' the atomised droplets, cos they going to hit your valve or another piece of cast ally/steel somewhere. That's also why you enrich your mix during cold starts, there is not enough heat in the castings to evaporate all your fuel yet.
I woudn't be to worried about the injection angle/direction, your tune will definitly be able to correct for the differences. (You tune cold-start conditions differently depending on 'wall wetting' parameters.
 

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Looks awesome!

I’m waiting to hear back from Jim Inglese about costs in his systems for what I’m after.
Glad to hear you’ve been able to make all of the intakes work without too much difference between them. Crazy how the price differs though.
The DC&O trumpets seem to fit really low compared to the speedmaster/borla in the cobra. What are the two engines? Both 302 based?
All motors are 302 based. The Cobra photo is the speed master, the attached here is the Inglese / Borla unit
 

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Peter, It almost looks like that intake can be mounted up the other way so the injection is down flow (IE injecting above and into the butterfly) my supervee kugelfischer mechanical injection is similar with injectors before butterfly (pointing in flow direction)
 
Hi Chris,

I responded to you in another thread re Speedmaster ITBs and Audi transaxles.
I said I’d check records re my GT40 setup.
I believe it is stack injection and I have had no issues bar a trumpet coming loose.

I have the injectors on the outside on that engine and it is fine. The car has run successfully at speed events against some very exotic vehicles including V8 Supercars (a dull control formula, with the same destructive attitude to other far more interesting formulas as NASCAR, but here in Aus).

No evidence of an atomisation or other fuel distribution issue, I guess injector choice might be a factor here.

Tim.
 
I may be wrong but I have a dim memory that the TBs can be installed either way around so the injectors could be in or out.
From memory we went with outside because the 302 based block is quite small and the TBs are quite close to each other which led to packaging problems with the rest of the gear we used.
I remember we were happy that dyno’ runs showed no issues with the injector position
We did think about it.

Sorry for the vague response but it was installed over ten years ago and I have quite a few cars conspiring to confuse my memory.

I am not near the car atm due to covid distancing restrictions, so I can’t check it easily.

Tim.
 
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