Bosch 1000cc injectors on an Evo
Feb 24, 2009 | 05:02 PM
#47
Dan, I'm not doubting anything from the field about the Bosch injectors. The field reports are good. I'm not doubting that they appear to be easier to tune, and I'm not doubting the common fact that it is possible to overcome volumetric limitations for any injector by upping the base FP. I'm not doubting that Delphis were not the do-all, end-all of injector technology. FWIW, I have none of the issues you described with my current injectors, nor did I with either of the last three sets of Delphis I had. I've never seen <26mpg hwy in any case, so as always, YMMV. Nonetheless, I'm not doubting the Bosch injectors appear to be better. I'm not doubting any of these things, and the information presented here is duly appreciated.
Again, I'll ask a very simple question that no one has answered. What type of injector is the new Bosch? My personal suspicion is that it's either a single or double pintle. Surely someone, somewhere knows.
Again, I'll ask a very simple question that no one has answered. What type of injector is the new Bosch? My personal suspicion is that it's either a single or double pintle. Surely someone, somewhere knows.
Last edited by Ted B; Feb 24, 2009 at 05:04 PM.
Feb 24, 2009 | 05:34 PM
#49
I'm perfectly fine with the confidentiality issue. Again, it's appreciated.
I've been curious about this injector from the get-go, but being an E85 user, I'm not sure I can make it fit my application comfortably.
I've been curious about this injector from the get-go, but being an E85 user, I'm not sure I can make it fit my application comfortably.
Feb 24, 2009 | 07:11 PM
#50
Evolving Member
Joined: Mar 2008
Posts: 102
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From: Midwest
Just a side note here, Tony runs 2 injectors per cyl. in his application which is well beyond the average power level of most.
Last edited by twkdcd595; Feb 24, 2009 at 07:18 PM.
Feb 24, 2009 | 07:25 PM
#52
Evolving Member
Joined: Mar 2008
Posts: 102
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From: Midwest
The many other real world numbers coming from these things really can tell you how well they flow as well. Compared to a traditional p&h 1000, anyone can see it is quite an improvement... plus they behave like a much smaller saturated injector, driveability, idle, etc... all seeing improvement.
Edit: Great post above at the beginning of this page btw dan |, tons of good information.
Last edited by twkdcd595; Feb 24, 2009 at 07:30 PM.
Feb 25, 2009 | 06:46 AM
#54
Newbie
Joined: Dec 2003
Posts: 55
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Ted,
I must say I don't know where your getting your info from but your dead wrong with your high fuel pressure theory's..
I tune all sorts of applications from boats,cars,sleds, motorcycles, etc.. Every application improves with Better fuel atomization. Running more pressure will create better atomization.
You might want to try it yourself before you make these claims...
I must say I don't know where your getting your info from but your dead wrong with your high fuel pressure theory's..
I tune all sorts of applications from boats,cars,sleds, motorcycles, etc.. Every application improves with Better fuel atomization. Running more pressure will create better atomization.
You might want to try it yourself before you make these claims...
Feb 25, 2009 | 07:17 AM
#55
From SAE testing and industry experts who provided the info quoted in post #42. Had you bothered to visit the link and read through it, you would have learned something, put it into perspective, and not made such a blind comment. Thank you.
Last edited by Ted B; Feb 25, 2009 at 07:20 AM.
Feb 25, 2009 | 08:44 AM
#57
Enzo, the info I posted above represents general engineering facts, and do not cast into doubt in any way that the Bosch injectors appear to function very well. I want to be clear about that.
Feb 25, 2009 | 09:29 AM
#58
Regarding the new Bosch injectors, I've had some private discussion (thanks Dan), and consulted a few independent experts for additional information. I've compiled my findings for all who would like to know the details.
Attributes of this particular Bosch injector:
- The seamless case and internal design permits higher FP without risk of rupture.
- This is a ball & seat injector, and has an unusually low mass mechanism (even for this already low mass type).
- The exceptionally lightweight mechanism allows for peak & hold type response time from a saturated design - which is unprecedented.
- The speed of the mechanism remains high when subjected to the increased resistance of higher FP.
- It maintains atomization quality and spray pattern integrity well.
- It's a no-brainer for any vehicle whose OE was saturated injectors (e.g. every modern Honda).
- It is regarded as the latest generation of injector design, although it's been around for a short while.
- The injector starts as a ~680cc@3 bar, and can be modified to flow upward of 1000cc, but that seems to be about the physical limit. You'll either have to increase the FP or run multiples if you need more than that.
I think that about sums it up as far as the basic technical info goes. Thanks to all.
Attributes of this particular Bosch injector:
- The seamless case and internal design permits higher FP without risk of rupture.
- This is a ball & seat injector, and has an unusually low mass mechanism (even for this already low mass type).
- The exceptionally lightweight mechanism allows for peak & hold type response time from a saturated design - which is unprecedented.
- The speed of the mechanism remains high when subjected to the increased resistance of higher FP.
- It maintains atomization quality and spray pattern integrity well.
- It's a no-brainer for any vehicle whose OE was saturated injectors (e.g. every modern Honda).
- It is regarded as the latest generation of injector design, although it's been around for a short while.
- The injector starts as a ~680cc@3 bar, and can be modified to flow upward of 1000cc, but that seems to be about the physical limit. You'll either have to increase the FP or run multiples if you need more than that.
I think that about sums it up as far as the basic technical info goes. Thanks to all.