I have a 90 1.6 miata with ms-II 3.0 edis with ITB's. I am using stock injectors and stock fuel pressure regulator.
What injector staging should I use for this setup? injector staging is currently set at 2 squirts alternating.
off idle tip in produces a bog and idle seems erratic.
I am looking for responsive accelaration from my setup.
TIA
ITB's and injector staging
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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.
ITB's and injector staging
90 Miata MS-II v3.0, EDIS, IRTBs
-
73Inka2002
- MegaSquirt Newbie
- Posts: 30
- Joined: Sat Sep 18, 2004 2:21 pm
A lot of people with ITBs (myself included) have had good success with 4 squirts alternating. Also, the latest beta code (with faster MAP sampling?) or the MSII Extra beta code (with faster MAP sampling and EAE) are supposed to help a lot with lean tip in. Oh, a vacuum accumulator thing may help too. The idea is to tie all the vacuum lines together into a single plenum device to smooth out the MAP signal so you get more accurate and consistent fueling.
I assume your VE table is already pretty dialed-in?
Regards,
Robert
I assume your VE table is already pretty dialed-in?
Regards,
Robert
Car Info:1973 BMW 2002
MS Info: MSII v3.0, Code 2.871t4b (beta), MegaTune 2.25, EDIS-4, Innovate WB, Suzuki GSX-R Individual Throttle Bodies
MS Info: MSII v3.0, Code 2.871t4b (beta), MegaTune 2.25, EDIS-4, Innovate WB, Suzuki GSX-R Individual Throttle Bodies
Robert:
Im gonna give 4 squirts alternating a try.
Ive got an accumulator hooked up to the itbs and its a definite must have to smoothe out vacuum to MS and fuel pressure regulator.
I was so quick in blaming MS and its current tune for my bogging and hesitation. Apparently my #4 spark plug had started fouling and messed up my tune. Changed to a new set of plugs and car runs like a champ even without AE.
Lesson learned is, "Its not alsways the tune and MS."
Im gonna give 4 squirts alternating a try.
Ive got an accumulator hooked up to the itbs and its a definite must have to smoothe out vacuum to MS and fuel pressure regulator.
I was so quick in blaming MS and its current tune for my bogging and hesitation. Apparently my #4 spark plug had started fouling and messed up my tune. Changed to a new set of plugs and car runs like a champ even without AE.
Lesson learned is, "Its not alsways the tune and MS."
90 Miata MS-II v3.0, EDIS, IRTBs
-
73Inka2002
- MegaSquirt Newbie
- Posts: 30
- Joined: Sat Sep 18, 2004 2:21 pm
Let us know how it works out.
When you switch to 4 squirts, you may need to retune your VE table a bit unless you have your injector opening time setup nearly perfectly. It's not a huge problem, but something to be aware of.
When you switch to 4 squirts, you may need to retune your VE table a bit unless you have your injector opening time setup nearly perfectly. It's not a huge problem, but something to be aware of.
Car Info:1973 BMW 2002
MS Info: MSII v3.0, Code 2.871t4b (beta), MegaTune 2.25, EDIS-4, Innovate WB, Suzuki GSX-R Individual Throttle Bodies
MS Info: MSII v3.0, Code 2.871t4b (beta), MegaTune 2.25, EDIS-4, Innovate WB, Suzuki GSX-R Individual Throttle Bodies
I have 2 alternating and have tried different combinations but found this to be the smoothest at idle. Though I must admit I've never tried 4 squirts.
I found the accumulator to have made things worse. It just added extra capacity, therefore lag, to the system.
I found the best setup for my engine was a .6mm mig tip in the line from each TB and 1 more for good luck in the line to the ms. That's 5 in all.
Sounds like overkill but dampening each TB individually made a big difference to the size of the pressure pulsations without loosing too much response.
I found the accumulator to have made things worse. It just added extra capacity, therefore lag, to the system.
I found the best setup for my engine was a .6mm mig tip in the line from each TB and 1 more for good luck in the line to the ms. That's 5 in all.
Sounds like overkill but dampening each TB individually made a big difference to the size of the pressure pulsations without loosing too much response.
2L Alfa powered Model A Ford roadster.
MSII 2.88ini
EDIS4
GSXR ITBs
MSII 2.88ini
EDIS4
GSXR ITBs