Car cuts at high boost. - Page 2 - Miata Turbo Forum - Boost cars, acquire cats.

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Old 05-07-2012, 08:41 PM   #21
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Just looking at your msq, your req fuel seems off, because you never get over 84% VE even at 230kPa. That's more than 16psi of boost. Proper req fuel will put you quite a bit higher - well over 100 in your fuel table over 100kPa. This isn't necessarily dangerous, but proper req fuel def gives you a better comparison point for VE tables with others. It also gives you better resolution since minimum difference must be at least 1%.

I use straight TPS, so I don't have anything to tell you about your Accel Wizard settings.

Are you running wideband or lambda. I don't have your project settings so I can't tell. If you're running lambda with no knock sensing, that's a little crazy. Not that knocksense is particularly worth it, I would recommend wideband for sure.

Are your internals forged?
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Old 05-07-2012, 09:17 PM   #22
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ok i will change them up tomorrow, Turns out my boost gauge had a kinked line, stupid plastic. and my wastegate was shot so was overboosting... New wastegate and redoing all my vac lines woot
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Old 05-07-2012, 09:26 PM   #23
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Another question this time about my waste-gate, Its a stock 14b and with the vac line hooked up it boosts to 10psi like it should but then in high rpm (5000+) its creeps past 15. I think i can hear a vacuum leak where the actuator rod comes out of the diaphragm, also when i pinch the vac line to the waste-gate the rpm drops slightly. Im guessing the diaphragm is leaking thus causing the over boost?
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Old 05-10-2012, 09:44 PM   #24
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Ok guys so i got all my problems sorted out, or so i thought..... replaced all the vacuum lines as described, boost gauge now reads properly and wastegate opens up to 15psi and holds it but now im getting a quick solid cut when im hard on the throttle mostly at wot,high rpm at 15psi. I attached a log and msq. you can see the afr's go way lean and the map drops off for a quick second. ANy ideas?
Attached Files
File Type: xls missfire.xls (900.8 KB, 59 views)
File Type: msq Best 2012.msq (34.7 KB, 51 views)
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Old 05-12-2012, 11:06 AM   #25
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Quote:
Originally Posted by sccaax View Post
Just looking at your msq, your req fuel seems off, because you never get over 84% VE even at 230kPa. That's more than 16psi of boost. Proper req fuel will put you quite a bit higher - well over 100 in your fuel table over 100kPa. This isn't necessarily dangerous, but proper req fuel def gives you a better comparison point for VE tables with others. It also gives you better resolution since minimum difference must be at least 1%.

I use straight TPS, so I don't have anything to tell you about your Accel Wizard settings.

Are you running wideband or lambda. I don't have your project settings so I can't tell. If you're running lambda with no knock sensing, that's a little crazy. Not that knocksense is particularly worth it, I would recommend wideband for sure.

Are your internals forged?
I have proper req fuel and hit 22psi am no where near over 100 in my VE table. I"m not above 90 yet either. I also have proper injector dead times for the 460cc's

OP please upload the ini file with your tune.
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