I'll need to check my compressions again soon. That 1000cc injector has me worried.

 

I had a batch of ID2000s that had to be replaced at 1 month old. They sat for 2 weeks in E and seized up.

Any who, you may be running leaner in 1 cylinder and not notice at that AFR. IMO 10's is way too rich for E.

You'll pick up a couple MPH if you lean that out to a 12.0-12.5 once the injectors are good.

 

I agree that 10's is a little harder to ignite .

AFR is measured as an average of the 4 cylinders on most cars. I like to target 11.6 to give myself some wiggle room.

We have old engines that need to live on our street cars. I've run my personal car on the dyno and it makes the same power at 11.5 as it does 12.0. I'd prefer the richer mixture to cool things down.

 

Are you actually running 10.0 with a gasoline selected wideband on E85? I'd be amazed if you haven't been getting misfires.

I've tuned hundreds of Evos on E85 and I always aim for around 11.8-12.0 for a street car and 11.3-11.5 for a track car.

 

On 91 octane, I usually saw 10.5-10.8 at WOT. On E85, it's 10.0-10.5.

I agree that AFRs in 10s is harder to ignite and I'm not a fan. However, I can understand why Sam tunes it this way. I hope my compressions come out good since that 989cc injector is a huge clog/decrease. It probably save my engine. If I lean out my fuel with these cleaned injectors, I will need to reduce my timing advance. It is very aggressive and I believe that Sam did that because of how rich the tune is.

 

Guess I'll be diving into ecu tuning soon. I was avoiding that but I can't afford to constantly pay for new tunes.

 

That's concerning. I have a new set of ID2000 I'm planning to swap in with my bigger turbo.

 

Sounds like a stock tune, lots of timing, and lots of fuel. Do you have "lean spool" enabled?

 

Time to find a new tuner.

 

I'll need to look.

 

I actually don't trust anyone in my area. I have a 4 good friends who are tuning and/or haved tuned customer's cars.

 

What kind of timing are you running up top?

I usually tune leaner on E85 than most. Anywhere from 11.5 to low 12's should be a giant improvement from 10's.

I have stupid miss issues on any car I tune on E that comes in with that rich of a fuel map. They usually keep swapping plugs thinking that's it. We have a couple local tuners that keep the AFRs like you're running 91

 

Yea, make sure you start the car every once in a while ha. It cost me another $1k.

I did have them exposed to outside air at one point for a few days, my guess is that was the killing point.

Sent them to ID and they couldn't help.

 

I'll probably get some flack for this but after having tuned E85 for over a decade now, you can notice when a E85 car is in its sweet spot by the tone of the exhaust. Of course, I don't tune just by sorcery so I also pay attention to the logs and torque curves.

Either way, yes, 10 afr on a gasoline gauge on E50+ is way way way way way way way way way way way too rich. I've done extensive AFR testing on the dyno and street on my own personal cars over the years and saw no worthwhile power gains from 11.5 to 12.5 AFR so I just tune it at 11.5-11.8 now.

On my DI cars, I run it at 12.5-13.2, depending on the car and setup.

My MK7 VW ran stoich at WOT with pump gas from the factory. :-O

 

Nothing off there, you can hear it. Not something I pay super close attention to, but maybe I should.

I've had lots of luck on the leaner side of things, my car tends to pull harder to redline at 12.5ish than 11.5. Peak Horsepower is negligible, but there is a slight bump under the curve. It's minimal, but the car loves it.

Also, who knows if everyone's wideband is accurate to whats going on. We all know cylinder deviation is impossible to tell with one sensor and no individual EGT monitoring.

So it's always better to go on the safe side of things as you have stated.