408, 91mm, E85, Head Lifting Issues.. HELP!
10-22-2013, 10:19 AM
#21
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You have verified your WOT AFR with WBO2 or just commanding x AFR and fingers crossed? Seems like most probabale cause is lean. Based on your findings I would be so hung up on a lean condition that if one WB02 told me g2g at WOT; I would double check with another WB02.... Dont blame the E85, its very cheap and easy to verify ethanol content, quick fuel makes a simple graduated baret that works like a charm. I did it this way for years before going to a permanently mounted solution with zietronix display and GM FFV sensor.
10-22-2013, 10:34 AM
#22
I would still give it a shot around 0.73 lambda and see how it reacts. Obviously you'll be looking for that lambda feedback, not just telling it to do that in the tune. If the tune is off, its not likely that the engine will respond as it should to any respective changes in commanded EQ ratio.
10-22-2013, 02:33 PM
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Need to see ACTUAL wideband readings before you make any assumptions. Its completely possible the tuner tuned it correctly but then you are going lean later for whatever reason.
Need to have a wideband gauge in the car at all times. And its ok if it reads the gas equivalent which would be in the 11s at that lambda. Without this info, its impossible to guess.
My setup is below. 11.8:1 CR, 15psi, 26 degrees. I run about the same mid 11s AFR (gas eq) on a WOT run.
Need to have a wideband gauge in the car at all times. And its ok if it reads the gas equivalent which would be in the 11s at that lambda. Without this info, its impossible to guess.
My setup is below. 11.8:1 CR, 15psi, 26 degrees. I run about the same mid 11s AFR (gas eq) on a WOT run.
10-22-2013, 02:38 PM
#27
Yeah, wondering if he tuned it on the dyno and never on the street and either a blend change or when it got on the street the AFR changed. I know when I used to tune on a dyno, when you get on the street it would load different and for whatever reason would go leaner on the street. I saw this with just about every car I tuned. That is why I stopped using the dyno much and spent most of the time on the street or track.
10-22-2013, 03:53 PM
#28
Blaming the E85 is the worst thing you can do. E85 is a much better fuel in MANY aspects than gasoline. Saying its the fuel's problem when its obviously something else is just going to cause you to settle for second best because your tuner can't figure out whats going on or there is a problem in your setup somewhere.
10-22-2013, 09:03 PM
#29
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They change the blend right on time with the season but even in the middle of winter it never drops below E75 (every station) which is within the ability of the calibration to compensate for.
10-22-2013, 09:15 PM
#30
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Yeah, wondering if he tuned it on the dyno and never on the street and either a blend change or when it got on the street the AFR changed. I know when I used to tune on a dyno, when you get on the street it would load different and for whatever reason would go leaner on the street. I saw this with just about every car I tuned. That is why I stopped using the dyno much and spent most of the time on the street or track.
10-24-2013, 10:27 AM
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what head studs?
i was running the ls9 gaskets on my engine with arp studs and tfs heads and never pushed water. 25psi off a bw 80mm. even with the new garrett 88mm it say over 25psi. over 30 actualy. bent the crank but never pushed water.
i was running the ls9 gaskets on my engine with arp studs and tfs heads and never pushed water. 25psi off a bw 80mm. even with the new garrett 88mm it say over 25psi. over 30 actualy. bent the crank but never pushed water.
10-24-2013, 11:05 AM
#38
I think you are all missing one of the most important factors here. What type of E85 is being used, and which E85 was it tuned on? From a pump or out of a can? As we know, all E85's are not equal, at these power levels, we need to look at every element in the equation. Fuel is where this whole pastime/hobby/passion/lifestyle/interest starts. It sounds to me a few remedial steps were skipped.
