Proposed Timing Maps - Page 2 - Miata Turbo Forum - Boost cars, acquire cats.

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Old 07-17-2009, 06:53 PM   #21
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You may want to go back and read Savington's interjection about 18 degrees at 4500 @ 180kPa being a bad thing.

The reason most of our maps dip there is as someone mentioned in the thread Rafa linked--it's the torque peak and the cylinder pressures are highest. That's where knock is most likely to rear its head. Best to back off a little bit and save the motor.

Incidentally, my spark map is *slightly* more aggressive than FM's base map for the hydra. Porting it over was a bitch if anyone cares.

Vlad: start a new thread for fuel maps if you wanna see em. This is the timing map thread.

Stein: I wish the software had two things: 1) fully configurable breakpoints for RPM and MAP, and 2) a rescale function. sigh.
FWIW: I only wish I could get the car to rev that high under boost. Hell, I have yet to go more than 75% throttle and really dig in since I get this insane sputtering under fast rising boost. If I ease in, she pulls well and is okay but when I stab the throttle the AFRS go from 13s to 11s and I get what feels like a miss. So till I get this resolved... no high boost RPMs for me :(

Will go in and adjust the timing more as I go... input like yours is great! Honestly, thanks

Cheers,
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Old 07-17-2009, 07:00 PM   #22
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If I ease in, she pulls well and is okay but when I stab the throttle the AFRS go from 13s to 11s and I get what feels like a miss. So till I get this resolved... no high boost RPMs for me :(
Pretty sure it's your asynch. Follow the Asynch procedure for tuning it. Start at zero, stab throttle. If hit hesitates, add 5. Keep going up. It will get better. Keep going. When it starts to do it again, back it off. Do again from 1500, 2000, 2500. You will need less each time.

Paraphrasing, but it's in the manual.
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Old 07-17-2009, 08:05 PM   #23
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AFR going to 11 shouldn't make the car buck or sputter.

If you're running closed loop ignition, it may be a too sensitive knock sensor noise map.
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Old 07-20-2009, 08:20 AM   #24
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I've been using this map for 3 months now up to ~155kpa on 93 octane.
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Old 07-20-2009, 09:52 AM   #25
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AFR going to 11 shouldn't make the car buck or sputter.

If you're running closed loop ignition, it may be a too sensitive knock sensor noise map.
I did more tuning over the weekend... added more duration by hand to the injectors for my trouble areas. Much better than before but still have a long way to go.

Dumb question... could a bad, just 1, injector make this happen?

Cheers,
Prospero
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Old 07-20-2009, 10:57 AM   #26
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Originally Posted by Prospero View Post
I did more tuning over the weekend... added more duration by hand to the injectors for my trouble areas. Much better than before but still have a long way to go.

Dumb question... could a bad, just 1, injector make this happen?

Cheers,
Prospero
yes it could. the wideband averages all four cylinders to obtain a reading (it has to, there's only one downpipe) and if one injector is way off, it'll cause the other three to compensate in the other direction.
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Old 07-20-2009, 11:17 AM   #27
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Dumb question... could a bad, just 1, injector make this happen?

Cheers,
Prospero
Possible, but doubtful. Your new 600's were 100% tested and should be good. Might check the Windows>ECU data screen when driving. See if all four are firing at the same rate.
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Old 07-20-2009, 11:31 AM   #28
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Possible, but doubtful. Your new 600's were 100% tested and should be good. Might check the Windows>ECU data screen when driving. See if all four are firing at the same rate.
I was a dumbass during the injector install and one took a 2' drop onto concrete... the pindle cap (sp) got knocked pretty good and was visibly out of alignment... I was able to press it back into shape; but it was not 100% spot on. Sadly I was in a bind and had to put my injectors in before it started to rain and so I rolled with it.

Forgot all about this issue; but now it seems to be the problem...

Hope I can get it fixed!

Cheers,
Prospero
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Old 07-20-2009, 11:38 AM   #29
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Originally Posted by Prospero View Post
I was a dumbass during the injector install and one took a 2' drop onto concrete... the pindle cap (sp) got knocked pretty good and was visibly out of alignment... I was able to press it back into shape; but it was not 100% spot on. Sadly I was in a bind and had to put my injectors in before it started to rain and so I rolled with it.

Forgot all about this issue; but now it seems to be the problem...

Hope I can get it fixed!

Cheers,
Prospero
Well, send it back to them and if you are up front with them I'd guess a low-to-no cost repair.
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Old 07-20-2009, 11:40 AM   #30
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Well, send it back to them and if you are up front with them I'd guess a low-to-no cost repair.
Yeah, I already have made contact. Waiting on a reply. Honestly, I do not mind having to buy 1 more injector... my own fault...
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