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Bosch 968's vs Deka Injectors


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  • Member For: 18y 10m 3d

A little not to all the tuners out there that are having issues with the dekas running fat at idle and causing poor fuel economy. Perhaps this could solve your complaints about them.

The maximum value of the injector low slope is 0.03, a deka is 0.032. Turn the min/max checking off in the software so you can actually put in 0.032 without Advantage cracking the sh*ts.

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  • Member For: 18y 9m 5d
Yeah well to add further to my experience I found that the drilled items yielded very poor cold starts.

Funny that having spoken to a few people who have run these injectors, some who have removed them like I have had the same issues as me.

All I can say is from what I have seen they do not do the job well. Having had a look inside a intake port of a head that was fitted with drilled items shows a rather odd spray pattern. :blink:

Ohhh and to further add to this, although my car might run a tune from a different tuner, I had experienced the cold start issues with my Nizpro tunes also. Having the car stall for no reason during cold start was just one of the lovely issues me and others have had. Retuned the car and still had issues, changed injectors and nothing else but the scalers and viola, problems solved.

I am not saying this to start an argument but just giving my experience with drilled items. I would welcome some comment/reasoning with regards to the above 2 posts I made. Perhaps I had a sh*t set of injectors.

Either way I would rather use the cheaper item produced by a large company that has many engineers working for them designing things like this.

Thanks for the info bloke,

Care to elaborate on the poor cold starts you experienced with the Nizpro injectors for I have similar issues at present and would like to know in more detail what way your cold starts were affected?

Have been told plug gap is the culprit but guess what ... recently put new genuine BF F6 plugs in gapped at OEM specs ... no f*cking difference :bangcomputer:

Feel free to pm me if you wish

Cheers

Justin

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  • Member For: 21y 9m 24d
  • Gender: Male

Without a doubt profit margins. The original holes in the injector were drilled by a laser I believe. An injector is a precision piece of equipment and although whilst a drilled injector can do the job it certainly offers the injector seller a very high profit margin.

I'd like to see the spray pattern of those drilled injectors on an injector bench. I bet the drilling really stuffs up the spray pattern compared to the original spray pattern.

Check out this guy on youtube. He has a few videos of injectors on the flowbench. This will give you some idea as to why a injector spray pattern is so important for economy,emmissions and idle. I dont think it makes that much diff at outright power.

7oTirEZNRw8

I'm probably not qualified to comment on this as I still run stock injectors....... but I will anyway.

Are we talking performance or profit margins that drives some shops to offer certain types of injectors, or anything else for that matter, over other brands that are known too still do a bang up job for less money.

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  • Member For: 18y 10m 3d
Thanks for the info bloke,

Care to elaborate on the poor cold starts you experienced with the Nizpro injectors for I have similar issues at present and would like to know in more detail what way your cold starts were affected?

Have been told plug gap is the culprit but guess what ... recently put new genuine BF F6 plugs in gapped at OEM specs ... no f*cking difference :bangcomputer:

Feel free to pm me if you wish

Cheers

Justin

Upon getting my car, I changed the plugs (had what looked to be original ford ones regapped). No love.

Cold stars the car would idle is guts off to start with. Put it in drive and it would leap forward and hope like it was misfiring, that's if it didn't just stall. Thank god those were issues of a long time ago.

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  • Member For: 18y 10m 3d
I'd like to see the spray pattern of those drilled injectors on an injector bench. I bet the drilling really stuffs up the spray pattern compared to the original spray pattern.

Here is some pics from a head that was fitted with drilled injectors.

post-8395-1210165704_thumb.jpg

Cyl number 1

post-8395-1210165769_thumb.jpg

Cyl number 2

post-8395-1210165817_thumb.jpg

Cyl number 3

post-8395-1210165878_thumb.jpg

Cyl number 4

post-8395-1210165922_thumb.jpg

Cyl number 5

post-8395-1210165967_thumb.jpg

Cyl number 6

Who wants drilled injectors now? :bangcomputer:

Edited by Fatsex
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  • Member For: 17y 5m 6d
  • Gender: Male
  • Location: Broady, Melbourne

It's great that you ran a nice time using the 968's but no one is questioning or has questioned the quality of the Bosch 968's. Rather, you have questioned the quality of the Siemens in a public forum, and therefore the onus is on you to provide evidence of the 2 main statements you made about the Siemens 60 pounders:

1. Poor fuel economy

2. Inconsistent flow between injectors

Edited by straughsberry
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