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Interesting MAF based datalog

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Old May 7, 2009 | 11:56 AM
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Interesting MAF based datalog

3500 RPM, 3rd gear, IAT 16C, MAT 29C, Coolant 83C.

Running off MAF sensor, stock FQ360 ignition map, fuelling about 12:1 spool then 11.5 on full boost, 1.7 midrange target on AVC-R with 63% duty, but a completely stock map can also do what is shown.

The period shown is about 1.5 seconds. I had partly opened the throttle to accelerate and then had to lift just as the turbo was spooling up. Knock sum goes 10-12-14! Scale on the right is NBO2, all else on the left, MAP scaling is kPa. Note how the load, IPW, NBO2 drops out even when the manifold pressure is still high.

I'd forgotten how nasty these MAF jerks can be, and they are difficult to produce to order so it was nice to log a really good example. I was running MAF to check VE since I changed the exhaust since I can't use my tailpipe WBO2 sensibly with a cat. As it happens running 0.1 bar less because of the quieter exhaust with cat, the VE is pretty much the same. If I pushed the boost on the restrictive exhaust like I did on the loud one I think the top end VE would drop.

Driving it again on the MAF is not something I want to continue, they are almost evil when this sort of thing happens!
Attached Thumbnails Interesting MAF based datalog-mafliftoff.png  

Last edited by jcsbanks; May 7, 2009 at 11:59 AM.
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Old May 7, 2009 | 12:35 PM
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Stop teasing those of us who don't have SD for their ROMs yet.
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Old May 7, 2009 | 12:47 PM
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I'm doing 94170015 next. I know this isn't your ROM presently though.
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Old May 7, 2009 | 12:53 PM
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Originally Posted by jcsbanks
I'm doing 94170015 next. I know this isn't your ROM presently though.
I thought mrfred already did that one.
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Old May 7, 2009 | 12:55 PM
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I'll have a look!
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Old May 7, 2009 | 12:56 PM
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Here is the thread, and yes, that ROM is already done.

I guess you have no choice but to do 96530006.
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Old May 7, 2009 | 01:03 PM
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Thanks, go on then
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Old May 7, 2009 | 01:08 PM
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If you are suggesting that I tackle the SD patch for 96530006, I think you are giving me too much credit. I don't even want to try that one. I'd feel much more comfortable with you or mrfred patching that ROM.
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Old May 7, 2009 | 01:10 PM
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I was meaning go on then, I will do it
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Old May 7, 2009 | 01:22 PM
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Sweet.

I appreciate it. I finally ordered a bunch of stuff for my car (ETS 3.5" IC, Nisei LICP, Walbro FP, Synapse DV, etc) to finally fully tune it and get ready for E-85 (still have injectors to buy). Having SD will be a nice addition.
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Old May 7, 2009 | 01:27 PM
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By the way, do you or mrfred want donations for the SD patches or should we donate to Tephra?

Since I finally got around to using a tephrarom v 5.1 (with your livemapping), it's about time I re-donated to tephra.
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Old May 7, 2009 | 01:31 PM
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Give anything you'd give to me to Tephra.
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Old May 7, 2009 | 02:27 PM
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Dr Banks, your very kind.

The SD is tooo smooth!!! What is MAF? hehe
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Old May 7, 2009 | 06:37 PM
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^ jeez that's nice of you

I am going to have to hit you up for SD on EvoX :P hehehe

I will do a V7T5 of 88570008 next - as I am pretty sure V7T5 of 96530006 is done and working ok for everyone
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Old May 7, 2009 | 06:46 PM
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Originally Posted by tephra
...I am pretty sure V7T5 of 96530006 is done and working ok for everyone
Great! Maybe John will use that ROM as the basis for the SD patch along with his livemap/charting? (hint, hint)

BTW, Tephra, I sent you a little donation today for all of your hard work. Thanks again.


Eric
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