although not ideal, it does work. I've tuned probably 6-8 of these cars with that hellion kit w/o issueOriginally Posted by Jn2
although not ideal, it does work. I've tuned probably 6-8 of these cars with that hellion kit w/o issue
For starters unless you know how to tune the speed density in these cars correctly, you're better off staying away from it. Your causing more problems than you are helping. Turn cylinder anticipation off and set ALL of your speed density stuff back to stock including IPC MAP Maximum.
You need to scale all of your spark tables as well. Your spark values are really conservative as well depending on how much boost you bare running and fuel type. I did not see mention of boost level. Regardless, on e85 unless your running 20lbs or something stupid you can throw a bunch more spark in it. You do have to be careful with the turbo cars. They will not take much spark during peak torque. Your a little over agressive there but the car could stomach more spark up top. I also like to scale the knock sensor advance tables and let the sensors do some work as well. At the minimum you could allow the sensors to add a lot more spark down low(below 100% load).
And yes your maf table is off by about 26 lbs up top.
I hope this helps some.
The reason I unscaled athe spark tables and made it so conservative was to figure out the issue for why load isn't reading correctly. I know there is more in her but until MAF and load are reading more correct then I was leaving it safe for timing.
A lot of the adjustments made to SD tables and such were all recommendations from others to help. But I'll give it a shot and start over. I'll let you know.
Thank you.
Curt, at peak torque e85 TT 18 psi, what have you found to be the limit for spark?
I let my knock sensors add 3* from 14-15* during peak torque and it seemed happy, no knock, adds it every time. After peak torque im up to 19-20 till limiter, no knock.
The majority of people do not understand how to properly adjust the speed density calculations on these cars once you go FI. To be honest I have spent a bunch of time on it and figured a lot out but with all of the time I put in I never really noticed a huge difference in driveability vs. running solely off the maf.
That said, if you are not correcting your slopes etc. correctly and you are leaving anticipation logic on you are causing all kinds of airflow calculation problems w/o realizing it.
Stock motor 15 mustang?
Have you logged fuel pressure?
Sounds like you know what you're talking about over the others. So I believe you.
I'll give it a shot and start over with that info
Sleeved 13' block w/ 1500hp rotating assembly. ARP everything.
I don't know about all that but I have been lucky enough to tune a few of these with the same set up.
Let me know. I'll try to help more if I can
Has anyone figured the speed density out that you know of? I've been wondering if any of the big name tuners are able to take it on and recalibrate it properly, not like we're missing out on a lot by not tuning it, but I'm always curious. Trying not to get the thread off topic, just wondering.
I had an opportunity to talk to John Lund a little about it in Ocala and I'm fairly certain that him and Ken have it figured out. John is one smart mo fo.
Like I said though, I've never personally noticed a huge driveability difference between the two.
That's a whole different ballgame than a stock 15 coyote. The stock 15 pistons will melt if you put too much spark in them at peak torque. Once you start changing compression ratios and piston type everything changes. The knock sensors on the coyotes do a pretty damn good job. If you've got a good piston, e85, a little lower compression, no knock sensor activity and are running those timing numbers it sounds like you are pretty safe where you're at
Changed everything as you mentioned earlier and it didn't change anothing. All SD settings back to stock and anticipation disabled.... same exact readings. Load barely makes it to 90% and MAF struggled to hit 35lbs/min...
Not sure what to do next :-/
**edit** verified it is 6.5-7psi and boost leak test came back good. Seeing all the boost
Last edited by SYCK SS; 07-18-2016 at 05:41 PM.
^stock manifold?
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Yessir, car is bone stock other that twin turbo kit and fuel system.
Have you logged fuel pressure?
Yessir, fuel pressure is completely normal. No drop at all.
Out of curiosity anyway to mount MAF sensor backwards?
yes you can do that, but we triple checked that as well Its in there the right way.
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