I was curiuse as to what differet people's opinions were on these to setups for ITB's. I just adapted a toyota 4 throttle system to my brothers mazda protege and we are having some tuning issues. Currently using speed density. We can get a its just super rich like 11-1. nice full throttle run and tune. But our map range is so close togeather that we can't seem to get a nice highway cruise. Anything above 60 MPH puts us right up in 90-100 kPa range even though it is less than 1/4 throttle. Is this typical of ITB's? The ITB's have a common plenum for vacuum ports and such so our map sensor should be pulling from all 4 runners. We allready had to put a check valve for the powerbrakes to work for left foot braking. Thanks for any insight.
scott
ITB's Speed density or Alpha N
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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). 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.
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Underdog51
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devastator
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Re: ITB's Speed density or Alpha N
Check a datalog and see how stable your MAP signal is. Have you checked for a vacuum leak using a propane torch, (unlit of course)?
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The sand must be punished.
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amigafan2003
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Re: ITB's Speed density or Alpha N
I could only get down to 60kpa with my ITB set up on a 2.1l Pinto motor.
Had to go Alpha-n as even a 10% throttle opening would push it up to 90kpa.
Had to go Alpha-n as even a 10% throttle opening would push it up to 90kpa.
MS! V3 on 2.2 SOHC Pinto with GSXR trottle bodies in a Westfield SDV