I'm getting stuttering/hesitation at about 3900 RPM under WOT. It's right around 29psi and up to 32psi that it does this. According to the logging it looks like I'm at 350 load then it goes down to 5 or 1 load. Is this because I may be getting to 360 load and my maps only go up to 350?

I've already adjusted my fuel cut load to 638. It also may be my plugs (about 5k miles on copper plugs).

 

whats your 2=1 byte scaling factor?

increase it to 1.5 in the rom and in evoscan perhaps. or greater. like 1.8

 

It's at 1.4. I'll try 1.5 tomorrow.

 

Be sure to set both the one in the tune and the one on evoscan to the same number. The load will show what it is actually supposed to be when you set the number high enough.

 

Yes, I experienced that a month ago. Makes me wonder WTF I was tuning off of

 

Get iridium plugs.

 

It was just you over running the 1byte factor. Raise it to 1.5 like previously said.

 

Is it just me or should he order some bearings too?

 

no ****.. that timing is nuts.

 

I was thinkin the same

Any updates to the studder?

 

Am I running a little high on timing?

I'm glad you all pointed it out. I'm lowering my timing as we speak. You can't believe everything you read on the internet! Lessoned learned.

 

yes way to much. evos take less then dsm's.

 

Lowered the timing by 2* last night. I'll lower more up top thanks to some sound advice from tscompusa.

I raised the 1 byte factor to 1.5 which does show the right load now (360). I'm still experiencing the stutter. I'm changing the plugs now. I'll test tonight. I use NGK BR7ES at .022" gap. I had these in for about 5k miles. The plugs look good/normal. I think I'll gap them to .020". I think 32 psi of boost is causing it to blow out the spark.

 

Id prolly run bpr8es, but thats me. The e85 cooling may be helping and allowing 7's, have experimented with it yet. Few weeks.

I would do .020 on thr stock ignition at that boost tho

 

From that log, lowering it 7* globally at high boost wouldnt be a bad idea. 13-14* at 6500 is pretty common bordering on aggressive. You can run a 7 heat range out to 40psi on E85 at 0.020" gap and 630 ft lbs.

Is this on the stock coil dwell settings as well?

Aaron