I have a sbc 355 with twin turbos. Calculations called for 60 lb/hr injectors which I have installed. Problem I have is hard starting. Have to clear flood to get started. My ve analyze live autotunes cells at idle to 5's and 7's for 14.0 AFR and injector pw is around 1.2ms. Is this telling me that my injectors may be too big. Shouldn't my injector pw be around 3.4 or more?
SBC 355
Twin T04E turbos .63 a/r turbine and .60 a/r compressor
MSII running 2.891
Tunerstudio
Techedge wideband 02
Injectors too big?
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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).
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.
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Matt Cramer
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Re: Injectors too big?
I think you've set the opening time too high, so even with a pulse width equal to the opening time it's dumping in a bit too much fuel.
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hiperf402
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Re: Injectors too big?
Sorry for the delay Matt. I know you stay very busy. I uploaded my tune here. Could be way off though. I am still working on it.
Your thoughts on it are very much appreciated.
Your thoughts on it are very much appreciated.
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hiperf402
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Re: Injectors too big?
Don't know if these will help. Probably just trash.
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Matt Cramer
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Re: Injectors too big?
Hard starting is going to be a matter of dialing in the cranking pulse widths. I see you've backed down the opening time; you'll probably need to retune that VE table now as it seems you have patches where it's running pretty much off the opening time and not the VE table.
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hiperf402
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Re: Injectors too big?
Thanks Matt. I'll work on it.