Gohanet

Hello everyone, please help me.
Two days ago, I visited the duno booth for tuning a car.

At the first run at 17.5 psi, 93 octane and 14 angle, the car showed this graph.



And here is the log file of this measurement. ?????1.hpl

Then I increased the boost pressure to 21 psi and got such graphs and strange jolts when measuring a car.


And here is the log file of this measurement ????? 4.hpl?????5.hpl

Please help me understand what my problem is, I personally think that the problem is in the converter.

My specification:
Lm7 5.3 stock
S475
93 octane + methanol with 15psi
Th400 https://tsirace.com/shop?olsPage=pro...ake-valve-body
Converter https://tsirace.com/shop?olsPage=pro...-ms-400-900-hp

Project GatTagO

iTrader: (7)

If the engine is totally stock, I suspect valve float.

Andrew

Gohanet

I have a set of BTR turbo Stage 2, which includes camshaft, springs, etc.

lemming104

I haven't looked at the logs, but any knock activity? Are you really getting the 14* of timing advance you're asking for?

JoeNova

Knock retard or wheel spin.

gnx7

iTrader: (28)

Make sure you have enough octane as well.... is that 93 RON octane rating......? That doesn't sound like much octane for what you are asking for the engine to output. Check the spark plugs as well for the gap size.... maybe close them a little.

http://www.pencilgeek.org/2009/05/oc...nversions.html

Michael Yount

iTrader: (1)

Engine is pissed off it’s in a Ford. Hell, mine will only do 400. It’s REALLY ticked in mine.

truckdoug

iTrader: (25)

pull some timing out down low and rev it higher, 14* on pump gas at 4000 rpm is like begging for uncle rodney to come knocking

i'd have maybe 11-12 in it until past peak torque and then start bringing it back in maybe even add some up top

lemming104

Looking at the first of the two logs for the 20+ psi pulls, it's kind of interesting. The ECU doesn't seem to think there is any knock going on (although who knows if there actually is), timing locks in right at 14* and stays there, the IATs never go above 90*, and boost pressure looks pretty consistent. Commanded AFR is 11.57, but there is no data to indicate what it is actually getting. Cylinder airmass peaks around 2.08 g/rev at 5500 RPM, but it falls pretty quickly after that--down to 1.84 at 5900, 1.72 by 6000, 1.70 around 6700 when the pull ends. What kind of stymies me, though, is that the VE peak appears to occur at 5500 in the logs, and the engine isn't at peak boost until 5400, but that really disagrees with the dyno plot quite a bit. Based on what I am seeing in the logs, I would have expected the torque peak in the mid 5K range, but the dyno definitely does not say that.

What does a dyno plot look like when the converter is unhappy? I don't do automatics.