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Pimp_Dudu
Alfa Sprint
Joined: 17 Apr 2003
Posts: 157
Location: Helsinki, Finland
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 Posted: Fri Apr 30, 2004 5:49 am Post subject: 16v injector on a 8v |
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Can i put a 33 bosch16v injector into my 8v 92 1,7 ie alfa??is it possible and if it is will there be any change in the way my car drives??
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lesthegringo
Alfasud
Joined: 23 Jul 2003
Posts: 97
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| Posted: Sun May 09, 2004 3:10 pm Post subject: injectors |
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yes, they will physically fit, but they flow more, which won't be good. Since the 8v injectors have more than enough flow capacity to meet the needs of most tuned 8v engines, you will not gain anything. What you will do is overfuel your engine by putting in the 16v injectors, as they will give more fuel each time they open, so you will lose power.
To use the 16v injectors would require you to reprogram th ECU to compensate, but you still will end up losing because higher flow rate injectors will give a less acurately metered amount of fuel, given that the same quantity is required. This will give rougher running at part throttle.
Les |
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Serpent33
Alfa Sprint
Joined: 06 May 2003
Posts: 210
Location: Singapore
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| Posted: Mon May 10, 2004 3:46 pm Post subject: Re: 16v injector on a 8v |
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| Pimp_Dudu wrote: |
Can i put a 33 bosch16v injector into my 8v 92 1,7 ie alfa??is it possible and if it is will there be any change in the way my car drives??
Thanks |
The colour coding determines how high max BHP the injectors supports. I can't remember exactly but my 8v ie went above 120 bhp, starts detonating at high rpm and excessive heat build up because blue injectors ain't enough.
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Each time I speed I say, "Dear lord, make me fast and accurate..." |
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Pimp_Dudu
Alfa Sprint
Joined: 17 Apr 2003
Posts: 157
Location: Helsinki, Finland
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| Posted: Mon May 10, 2004 10:14 pm Post subject: |
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thnx alot guys...well i guess i'll have to think of some other cheap source of getting them BHP's  |
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lesthegringo
Alfasud
Joined: 23 Jul 2003
Posts: 97
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| Posted: Tue May 11, 2004 7:45 am Post subject: detonating at high RPM |
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The probable reason that your engine started detonating at high RPM when tuned was that you hadn't richened the mixture to compensate. Injectors are put on engines with some 50% flow capacity in hand, so that there is no chance of them becoming restrictive.
Either your injectors were dirty, which happens quite a lot, or more probably the injection was not adjusted to open the injectors for longer at the higher RPM sites.
There are lots and lots of people who would love to know how the injection was reprogrammed if you did have it done!
Les |
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Serpent33
Alfa Sprint
Joined: 06 May 2003
Posts: 210
Location: Singapore
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| Posted: Sat May 15, 2004 3:49 pm Post subject: Re: detonating at high RPM |
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| lesthegringo wrote: |
The probable reason that your engine started detonating at high RPM when tuned was that you hadn't richened the mixture to compensate. Injectors are put on engines with some 50% flow capacity in hand, so that there is no chance of them becoming restrictive.
Either your injectors were dirty, which happens quite a lot, or more probably the injection was not adjusted to open the injectors for longer at the higher RPM sites.
There are lots and lots of people who would love to know how the injection was reprogrammed if you did have it done!
Les |
The injectors are specified by Bosch themselves for the max BPH the different colours can cater. That is why the 16v comes with yellow ones. Well, and tuning the jetronic is no easy task.
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Each time I speed I say, "Dear lord, make me fast and accurate..." |
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Serpent33
Alfa Sprint
Joined: 06 May 2003
Posts: 210
Location: Singapore
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| Posted: Sat May 15, 2004 4:49 pm Post subject: Re: detonating at high RPM |
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| lesthegringo wrote: |
The probable reason that your engine started detonating at high RPM when tuned was that you hadn't richened the mixture to compensate. Injectors are put on engines with some 50% flow capacity in hand, so that there is no chance of them becoming restrictive.
Either your injectors were dirty, which happens quite a lot, or more probably the injection was not adjusted to open the injectors for longer at the higher RPM sites.
There are lots and lots of people who would love to know how the injection was reprogrammed if you did have it done!
Les |
The injectors are specified by Bosch themselves for the max BPH the different colours can cater. That is why the 16v comes with yellow ones. Well, and tuning the jetronic is no easy task.
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Each time I speed I say, "Dear lord, make me fast and accurate..." |
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Pimp_Dudu
Alfa Sprint
Joined: 17 Apr 2003
Posts: 157
Location: Helsinki, Finland
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| Posted: Sat May 15, 2004 10:28 pm Post subject: |
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| so how can they b tuned then...even if its a hard task |
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lesthegringo
Alfasud
Joined: 23 Jul 2003
Posts: 97
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| Posted: Sun May 16, 2004 11:30 am Post subject: 16v injectors |
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Just to clarify - if you put in the 16v injectors on the tuned car, you may be able to make the mixture correct at high rpm when there is need for more fuel, if you are lucky enough that the engine needs that amount of difference.
The problem is that the engine will then run richer all the way through the rev range, so at low to middle RPM you will have a rough engine. If you think this doesn't matter, just check your rev counter next time you are driving round, and then you'll realise just how little time the engine spends at high revs
Les
(PS, able to login now!) |
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| Posted: Wed Jun 02, 2004 9:19 am Post subject: Re: 16v injectors |
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| lesthegringo wrote: |
Just to clarify - if you put in the 16v injectors on the tuned car, you may be able to make the mixture correct at high rpm when there is need for more fuel, if you are lucky enough that the engine needs that amount of difference.
The problem is that the engine will then run richer all the way through the rev range, so at low to middle RPM you will have a rough engine. If you think this doesn't matter, just check your rev counter next time you are driving round, and then you'll realise just how little time the engine spends at high revs
Les
(PS, able to login now!) |
Ya true. I guess a standard set up QV that I am currently running is best for road use with little compromise. Just that in the past was seeking high bhp with compromise at low end, it ended up with high power but inadequate fueling at very high rpms. guess not much options left... |
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