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Agressive E85 ignition timing

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Old Sep 7, 2009 | 09:55 AM
  #16  
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TTP, for once I really agree with you

OP, take a look over here and do some serious comparisons and analysis: https://www.evolutionm.net/forums/ec...ming-maps.html

c6 is very right, and his warnings are very real. Unless that is second gear, I'd think you are still spooling late even for the 280 duration cams.
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Old Sep 7, 2009 | 10:13 AM
  #17  
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Here is my personal suggestion on what you should look at changing. I would also check out the thread mentioned above. Smooth things out, dont jump back and forth in timing values.

Remember as load decreases and RPM increases you need more timing. Less rpm more load you need smaller amount of timing, unless you want to blow up things. As I mentioned that 12-13 degree's of timing looks way past MBT and your losing power.

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Old Sep 7, 2009 | 12:37 PM
  #18  
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Or something like this:

1200s, 57 trim @ 29psi, Magnus, stock 03 cams, 475whp-

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Old Sep 7, 2009 | 12:53 PM
  #19  
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Or this. My own personal alt map.
Attached Thumbnails Agressive E85 ignition timing-e85map.jpg  
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Old Sep 7, 2009 | 01:28 PM
  #20  
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I did run out of time with my laptop because I lost my power inverter (it died) so the map is most definitely rough. I definitely picked up power through the midrange with that way advanced ignition timing.
I'm not sure my wideband sensor is healthy as it's almost 15,000 miles old. I ordered a new one today so perhaps that was a problem, Bad AFR's definitely would effect that.
I haven't been using knock as a determining factor for anything since I switched to E85 because I only rarely see any regardless of what else is going on.
Also, in the cells where project skyline is saying to remove the 0 and negative timing, I don't come anywhere near them so during my limited time before my laptop died I disregarded them. I'll be fixing them after I get the new WB02 sensor in.
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Old Sep 7, 2009 | 02:09 PM
  #21  
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From: Hayward
You're going to vent your block with that timing map THUB, you need to dial that midrange way back.

This would be a good starting point to look at:

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Old Sep 7, 2009 | 02:48 PM
  #22  
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Can you explain in detail what you mean when you say 'going to vent your block with that timing'?

Regards
SK
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Old Sep 7, 2009 | 02:54 PM
  #23  
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From: Hayward
Originally Posted by Oracle1
Can you explain in detail what you mean when you say 'going to vent your block with that timing'?

Regards
SK
Running past MBT puts extreme pressure on the engine internals and they will try and get away from all the abuse, usually by punching a hole through the block.
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Old Sep 7, 2009 | 03:59 PM
  #24  
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I'm definitely not trying to disagree with the entire evo community, but I'm dropping almost sixty horsepower with timing dialed back in the mid-range. I'm fairly certain being that far out on the fuel map would cause misfiring which I'm seeing none of. (I'm disregarding my WB02 until wed. or so when the new one comes in) But here's a graph with timing I got from suggestions on EVOM. timing is 3 degrees at 4K tapering to 16 at my 7K redline This was a second gear however. I'm not sure how important that is to note. sorry it's all I have right now.

Last edited by THUB; Sep 7, 2009 at 04:03 PM.
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Old Sep 7, 2009 | 05:28 PM
  #25  
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You could probably run about 5-6 degree's at peak boost since your only pushing 25, redline you could def run way more then 16 on e85, more like 20-23.
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Old Sep 7, 2009 | 06:33 PM
  #26  
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Carnage photos to follow shortly. No holes in the block and my oil has no coolant, but it sounds apocalyptic above 2k RPM. Knocking BAD BAD. Any guesses anyone?
EDIT: More thought and research leads me to believe I was running massively rich and thinned my oil out with unburned fuel. probably causing a rod bearing to fail. I'm about 1/2-3/4 of a quart high and it smells STRONGLY of E85. I changed my oil less than 1k miles ago. bearings are fairly cheap so here's hoping I don't need a new crank and rods I guess.

Last edited by THUB; Sep 7, 2009 at 06:58 PM.
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Old Sep 7, 2009 | 07:34 PM
  #27  
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Too much fuel or a broken piston.
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Old Sep 7, 2009 | 07:42 PM
  #28  
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Hopefully that's not the case, my oil smells after a few K of running. Hopefully that map didn't blow anything up. Good luck.

I highly suggest looking/doing a little more research on this subject before you get more involved in it. It took me about 8 months or so of reading, messing around, this and that, before I REALLY started tuning.

I don't think I've ever seen an evo torque line rise that slow on a stock turbo. Max tq at 5500? Maybe also raise duty cycle a lot more earlier in the RPM's to get the tq response better.

Not sure about this, but, your mid-range timing at peak tq has nothing to do with your overall hp. On E85, you want to keep it low at peak and then ramp up smoothly.

Last edited by lan_evo_mr9; Sep 7, 2009 at 07:58 PM.
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Old Sep 7, 2009 | 08:48 PM
  #29  
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Damn, did you just blow your motor in the same day you posted that crazy timing map? I hope not. I agree with the rest of the members that had posted here that your mid range is way past MBT. And if your engine did go out, I believe that the aggressive timing is the one to blame. Good luck bro, hopefully it's an easy cheap fix because an engine rebuild can hurt your wallet big time.

Last edited by ohhgyeahfasho; Sep 7, 2009 at 08:52 PM.
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Old Sep 7, 2009 | 09:04 PM
  #30  
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Originally Posted by THUB
Carnage photos to follow shortly. No holes in the block and my oil has no coolant, but it sounds apocalyptic above 2k RPM. Knocking BAD BAD. Any guesses anyone?
EDIT: More thought and research leads me to believe I was running massively rich and thinned my oil out with unburned fuel. probably causing a rod bearing to fail. I'm about 1/2-3/4 of a quart high and it smells STRONGLY of E85. I changed my oil less than 1k miles ago. bearings are fairly cheap so here's hoping I don't need a new crank and rods I guess.
This thread is bound to become a sticky. Sorry to hear

You can very well rock a bearing without diluting the fuel. I'm interested to see what actually happened here so everyone can learn from it.

Just a side note, unless you ran some leaded through, 15k Miles is not that much for a wideband. Also to whoever else was mentioning the late spool, we now know that can be attributed to the 2nd gear pulls - When things are tidy and back together tune in 3rd or 4th and check the rest of the gears after
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