Fellow MS'rs, I aplogise in advance for the length of the post but it'll hopefully set the scene & level of my understanding (obviously not too good!!)
As the title suggests am building a Microsquirted Gsxr 1100 Turbo. The question I have is regarding SD or Alpha-N or Blended Alpha-N. I've read plenty on the subject but have no definative answers. I know most prefer the SD setup but I have doubts on it's suitability for my install.
Systems I have used from other manufacturers use Alpha-N for the base load measurement (this dictates the Fuelling & Ignition from the lookup tables) then apply a correction for the MAP either positive (boost) or negative (vacuum). This MAP corrction table is pretty much constant for all engines as the delta remains the same. I can understand this & it fits in with my understanding of the use of individual TB's.
I know my inlet vacuum will be reasonable on idle but as soon as the throttle is cracked it will fall hence the need to go for Alpha-N, at least at low speed / no boost. The MAP will also saturate at higher throttle openings hence the need for Alpha-N there too. I will need the MAP compensation once the engine starts to see 0 vacuum / positive boost.
The bike will see mostly road use so needs to be as crisp as possible.
Question I have is if MS 2 can do the MAP corrected Alpha-N or will it have to be an Alpha-N to SD switch over?
I know this question has been asked in many different ways by many different people & I apologise if I have missed something somewhere. If anybody else has experience using the SD/blended Alpha-N in a similar install with success then I'm happy to take it on board! Just trying to get it all straight in my mind before I try starting / mapping.
Thanks,
Stewart
Fuelling Turbo Bike With ITB's
Forum rules
Read the manual to see if your question is answered there before posting. Many users will not reply if the answer is already available in the manual.
If your question is about troubleshooting, configuration, or tuning, you MUST include your processor type (MS-I or MS-II) and code version in your post. If your question is about PCB assembly or modifications, you must also include the main board version number (1.01, 2.2 or 3.0). For tuning/troubleshooting questions, please attached a datalog and your MSQ file to your post.
If you have questions about MS1/Extra or MS2/Extra code configuration or tuning, please post them at www.msextra.com Such questions posted here will be moved to: a temporary MSextra sub-forum, where they will be removed after 7 days
The full forum rules are here: Forum Rules, be sure to read them all regularly.
Read the manual to see if your question is answered there before posting. Many users will not reply if the answer is already available in the manual.
If your question is about troubleshooting, configuration, or tuning, you MUST include your processor type (MS-I or MS-II) and code version in your post. If your question is about PCB assembly or modifications, you must also include the main board version number (1.01, 2.2 or 3.0). For tuning/troubleshooting questions, please attached a datalog and your MSQ file to your post.
If you have questions about MS1/Extra or MS2/Extra code configuration or tuning, please post them at www.msextra.com Such questions posted here will be moved to: a temporary MSextra sub-forum, where they will be removed after 7 days
The full forum rules are here: Forum Rules, be sure to read them all regularly.
Re: Fuelling Turbo Bike With ITB's
I suppose I'll know more once I start tinkering with it.
I know the manual states that Alpha-N shouldn't be used with boosted engines as the airflow (hence VE) is not a direct function of speed & tps which I do get but I have seen posts from various people who are using Alpha-N on similar applications to mine.
I was just trying to explore the various otions so I had them in my head incase I do come accross the problem, maybe I'm worrying to much!!
I have the necessary hardware in place to run any of the options so as you say it's just a matter of choosing what I want.
Thanks for the reply
Stew
I know the manual states that Alpha-N shouldn't be used with boosted engines as the airflow (hence VE) is not a direct function of speed & tps which I do get but I have seen posts from various people who are using Alpha-N on similar applications to mine.
I was just trying to explore the various otions so I had them in my head incase I do come accross the problem, maybe I'm worrying to much!!
I have the necessary hardware in place to run any of the options so as you say it's just a matter of choosing what I want.
Thanks for the reply
Stew