PFF - Pennock's Fiero Forum, PDA Edition

LS4 / F40 swap - fieroguru (Page 78/216)

fieroguru

APR 26, 05:19 PM

quote

Originally posted by blander66:
Have you thought of using some sort of PLC circut to emulate the signals you need to make the ECM happy?

Yeah, I could probably have one of the electrical engineers or ET's at work help me set something up (my PLC programming is quite limited, one class in grad school), but I would prefer to find a solution that others could use as well. So I am keeping things relatively simple/basic and will see how far I get with this approach before pulling out the other more technical options.

quote

Originally posted by Bloozberry:
That's a lot of gas for one mile.

That's what I get for trying to type an update while the wife is calling me to the living room to watch a movie...

fieroguru

APR 26, 07:58 PM

I got home at a reasonable hour and my new shifter knob was waiting for me:

It was $16 on ebay and had the right shift pattern for the F40 - its for a VW. The install takes some work as the shifter knobs snaps in place on the VW and I needed it to thread into place. Here is an underside pic:

I cut the tabs off and used a large drill bit to bevel the area (the knob material is plastic):

To tap it for the M16 x 1.5 thread, I ended up running a .55" drill bit down the hole to enlarge it slightly. Next I ran a .63" bit down about 1.5" to allow the knob to slide over the shaft. Last I tapped the bottom of the hole for the shifter shaft. Here is an installed pic:

The boot came with a chrome plastic trim ring, but it is curved and won't work with the fiero console. So I took it of and just have the boot resting in the shifter area for now. I will probably attach it to the bottom of the shifter plate like the stock fiero boot was.

Then I switched the car over to run speed density and took it on the tuning circuit (about 20 minute) and got the first wave of edits to do. The E67's don't have a VE table, so I am using BlueCats conversion tool to go from the equation coefficients to VE table and back. Again I dump the log data into excel, filter out all the transition points, clutch is pressed, and when the engine is delivering negative torque then compile the needed changes based on the STFT.

fieroguru

APR 27, 02:39 PM

Spent the morning wasting gas. I filled the car up and the last tank averaged 18.5mpg, not bad for my daily commute and a few WOT runs. Then I took the car on a 121mile round trip down a 2 lane/4 lane and tried to keep the car in the 55-65 mph range. Then when I got back I filled it back up at the same pump. That trip averaged 27.7 mpg... not bad at all... gotta love that 6th gear!

ericjon262

APR 27, 02:49 PM

quote

Originally posted by fieroguru:

Spent the morning wasting gas. I filled the car up and the last tank averaged 18.5mpg, not bad for my daily commute and a few WOT runs. Then I took the car on a 121mile round trip down a 2 lane/4 lane and tried to keep the car in the 55-65 mph range. Then when I got back I filled it back up at the same pump. That trip averaged 27.7 mpg... not bad at all... gotta love that 6th gear!

wow, that's without DOD too right?

fieroguru

APR 27, 06:33 PM

quote

Originally posted by ericjon262:

wow, that's without DOD too right?

Correct. No DoD and with the stock timing tables. I should be able to add a couple more degrees of timing since I don't have the increased driveline loss of the automatic. The overlap from the camshaft acts like an EGR and lowers cruise vacuum which reduces pumping losses as well. Then you get the benefit of the smaller 5.3L of displacement and the sub 2000 rpm cruise speed. I would like to hit 30mpg at steady state cruise in V8 mode and then get DoD to take it over 30.

My old SBC swap that was dialed in pretty well, never saw more than 23 mpg with the 5 speed... no egr, too much engine vacuum, too many rpms at cruise...

ericjon262

APR 27, 06:49 PM

I wonder how far you can take it without DOD, I wouldn't doubt 30.

------------------
we're in desperate need of a little more religion to nurse your god-like point of view...

Built not bought... Because bolt-ons don't.

http://www.fiero.nl/forum/Forum2/HTML/119122.html

fieroguru

APR 28, 10:11 PM

Did more wiring today...

I wired up the transmission pressure solenoid and then cut a finger from a nitrile glove and slid it over the solenoid like a sleeping bag:

Then I fabbed up this little bracket and switch for the reverse lockout lever. The wires control a solenoid with N.O. and N.C. contacts. So while the shifter is in anything but Rev, the relay is on (ignition power) and the TCM sees the car in D4 and the ECM sees it not in park/neutral. When the shifter is moved to reverse, the relay drops out, the contacts switch states and the TCM sees the car in N and the ECM sees it in P/N.

Good news is that the car now can run code free without triggering reduced power mode, bad news is DoD is still MIA... At this point I suspect the MAP sensor. The LS4 MAP sensor wouldn't fit the LS2 intake, so I purchased a Vette MAP sensor. The max/min calibration scale for the LS4 MAP sensor is 128.13kPa/-0.31kPa and the LS2 Vette one is 94.43kPa/10.34kPa. I changed the scale in the calibration a while back, but DoD might be looking for a specific voltage range vs. using the scale to calculate the optimal voltage range. I am going to pick up an adapter harness to verify I need to change back before I start modifying the actual harness.

ericjon262

APR 29, 12:14 AM

the P/N switch is pretty slick, good thinking.

fieroguru

APR 29, 09:34 PM

Well the P/N switch on the shifter isn't going to work... During the drive to work this morning I must have tapped the reverse lockout during one of the shifts and it kicked it back to reduced power mode... I am just going to install the stock range switch and be done with this aspect of the swap.

The Input Speed Sensor error also popped up again... I need to do some more reading to see what the parameters are that set the code as I look for options.

I finally found the lower air dam from a member here on PFF, it showed up today, so I uncurled it and set it outside so it will restore to its stock shape. I also wire brushed the steel bracket and painted it. On Tuesday I will install these parts.

Also installed the head lights again (needed to replace one of the trim rings to the light wouldn't fall out) and wired up the CD player so the car will have tunes besides the exhaust note.

ericjon262

MAY 01, 12:13 AM

so are you just going to wire in a toggle switch for P/N? or the actual range switch?