does a stage 2 require bigger injectors ??
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Intermediate
Joined: Jan 2012
Posts: 33
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From: brooklyn
does a stage 2 require bigger injectors ??
hi guys Im reaching out to see if anyone has had a similar issues i have a 2019 street glide special and having my dealer install a stage 2
rd 468 cam 2 into1 exhaust and air cleaner they are tuning the bike with a tts masterttune and they are telling me they can finish the tune because its requiring bigger injectors 5.5s
im not worried about spending another 100 or so bus I'm worried that this might harm the bike in any way? did anyone else run into this issue?
rd 468 cam 2 into1 exhaust and air cleaner they are tuning the bike with a tts masterttune and they are telling me they can finish the tune because its requiring bigger injectors 5.5s
im not worried about spending another 100 or so bus I'm worried that this might harm the bike in any way? did anyone else run into this issue?
Seasoned HDF Member
Joined: Aug 2008
Posts: 5,074
Likes: 1,007
well, truth told, the injectors do not run 100% duty cycle, ideally they should not run over the 60>80% duty cycle. if you are not a wot man, probably stock will be enough. you can see how much an injector can power hp wise by using the internet calculators. if for instance, a 400cfm carb can support an engine, a 750 cfm isn't much help. matter of fact, tooo big is just as bad as tooo little. it is the same for injectors, short duty will provide a poor spray pattern, the ecu will adjust duty cycle to demand from sensors and driver input. sometimes recommendations for bigger is just a way to cover bases since the seller does not know the end user intents. if the dyno tune passes, then it is an over-kill. some may just want to separate you from your money.
Road Master
Joined: Nov 2015
Posts: 1,240
Likes: 395
From: georgia
The comment may not be in the best taste but it has always been very difficult to follow those posts the way they are written. I’m not attempting to be the grammar police but proper sentence structure would be helpful to get the points across.
I applaud his attempt to help but I find myself scratching my head attempting to follow what is being said in many of his posts. No doubt the points are valid—just poorly communicated.
I applaud his attempt to help but I find myself scratching my head attempting to follow what is being said in many of his posts. No doubt the points are valid—just poorly communicated.
Tourer
Joined: Feb 2015
Posts: 268
Likes: 36
From: Athens Greece
back on topic..
for the tuner to request bigger injectors.. he probably feels he can get better performance out of the motor,
your best course of action is ask for the current dyno results, THEN ask him what the bigger injectors are going to provide
as stated by bustert , they dont run 100%, im running a stage 4 on my setup with the stock CVO 110 injectors, tried 4.9' and they didnt provide ANYTHING, but a bigger TB would be more of a benefit than bigger injectors, mine carried the EXACT same wave and drop with both injector sizes telling us its lack of airflow choking the motor up top
im going to a 117 kit soon and upping to a 55mm with 5.5's
keep in mind... the stock injectors can keep up with more airflow, but stock airflow cant keep up with bigger injectors
as far as damage, none
so for $100 an injector.. might as well.. not like they are going to dump fuel or anything.. they are going to squirt what they are programmed too by the TTS and youll have them for future upgrades
youve been biten by the bug so more upgrades will follow
for the tuner to request bigger injectors.. he probably feels he can get better performance out of the motor,
your best course of action is ask for the current dyno results, THEN ask him what the bigger injectors are going to provide
as stated by bustert , they dont run 100%, im running a stage 4 on my setup with the stock CVO 110 injectors, tried 4.9' and they didnt provide ANYTHING, but a bigger TB would be more of a benefit than bigger injectors, mine carried the EXACT same wave and drop with both injector sizes telling us its lack of airflow choking the motor up top
im going to a 117 kit soon and upping to a 55mm with 5.5's
keep in mind... the stock injectors can keep up with more airflow, but stock airflow cant keep up with bigger injectors
as far as damage, none
so for $100 an injector.. might as well.. not like they are going to dump fuel or anything.. they are going to squirt what they are programmed too by the TTS and youll have them for future upgrades
youve been biten by the bug so more upgrades will follow
Last edited by ghost183; Jan 19, 2020 at 05:15 PM.
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