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The logic about timing numbers seems a bit odd to me. The knock sensors are on with the bama tune so if they see knock they will cut timing until it stops. This is standard on all cars. As there Is no set "safe" timing number. You could have a target of 25 degrees timing but if you get bad fuel this number becomes "unsafe" If the fuel is good enough like e85 you can increase timing allot because the fuel has a very high octane. So if we see 29 degrees of timing and the knock sensors are not pulling timing how is this not ok? The fuel seems to handle that much timing or the knock sensors would pick it up. If the knock sensors do see knock they pull timing. So if they pull timing and the timing is still at 29 degrees that means they pulled timing until it stopped. So how is this senario not ok? Running quality 93 with knock sensors just seems a bit far fetched that a current tune ruined your engine. This is all assuming your AF ratio is correct. Where the cyl 8 problems with melting the piston or cracking it? I've heard both. Also from my understating some tuners including bama were turning off knock sensors in their early tunes. Which would explain cyl 8 failures from pre detention.
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Darkhelmet, Yagermister recently datalogged another member's car of which was tuned by Bama. He was commanding 29° of timing on his car, and the knock sensors were pulling 4-5° on top of that timing. That's NOOOOOOOO bueno.
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All these guys on here I've had failures and I've hear bad things about every tuner. I mean EVERY tuner.
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What software and hardware were you using for tuning your Mazda? |
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I have a BAMA and Lund ghost cam mail tune, all race tunes and all feel the same with my mail order tunes. I run a real time AFR gauge in my car and have checked advance timing during acceleration. All close to the same, the ghost tune runs lean AFR gauge bouncing around 15.2- 16.0 idle.
Only failures I have seen on #8 is with stock tunes and Ford has warrantied them. |
did a quick data logging. 60 degrees outside temp, spark was 24 degrees with knock sensor at 4 degrees. This morning at 45 degrees outside temp timing was 30 degrees with 0 degrees on the knock sensor. af lambda was .83 or 12.2 af ratio. The computer should increase timing until it sees knock. And look how much different the numbers are with a big change in outside air temp. Yes 30 may be "to high" but with knock sensor at 0 there should be no cause for worry.
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Good example but this is just one vehicle, we also talk about failures but with AM there have been failures with just basic N/A mods. When we look at Lund, VMP and the like the failures have been caused when pushing the stock block to the limit. When a company doesn't have the ability to tune a car when going F/I or anything above 100 shot of nitrous I think this is saying something. The don't have the data record to write these tunes. I very well think none of their tunes are custom... rather they're just pulling from the record books. |
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