3.5L LX9 Swap into ’86 2M6 4 speed

Ok so did a little research and it looks like I need to set
my codemask to $AA to disable the checksum checking during
emulation. It seems that by not disabling the checksum, it
could be putting the ECM into limp home mode which is why
the fan turns on with the key in the on position (always
happens AFTER the fuel pump primes too). Apparently this
can also prevent data from coming through the ALDL port.

Also, my fuel injectors are supposed to be ready to pick up
tomorrow, so I'll be grabbing them as well. Hopefully all
goes well.

So injectors were the main problem, also my chip adapter
wasn't pushed in all the way... . Anyways, after the
cleaned injectors were installed and I loaded a 3.1L tune
into the emulator, it started up first try! After that we
took the car off jack stands and took it for a spin around
the block a few times. Feels so good to finally drive it!



And here's the video:
LX9 Start-up

Exhuast will be done on Monday or Tuesday and I'm gonna put
plates on it soon after and really begin to dial in the
tune. I decided to get a y-pipe made at Mill Bay Muffler
to keep things fairly inexpensive (using the stock muffler
and tips) and they're gonna weld up my cradle nut and
battery tray as well. If I want a better exhaust later I
can always upgrade to a better stock-style muffler.

How much longer till your turbo build is done Chay?

Put plates on the car yesterday after getting the exhaust done and having a battery tray made.  The car is much quiter now but still sounds really good IMO.  The tune is fairly close now at least with part throttle driving; just running a little on the rich side now.  So far no problems with knock retard so I might play a little with timing advance as well.  I'll probably get a video of the final exhaust sound later.

Thanks!  Gas mileage doesn't seem to be too terrible right now so that's a good sign.  I was worried at first about how bad the 4 speed manual would be.  I think it probably helps that the torque peak of this engine is relatively high compared to the 2.8 (4800 rpm IIRC), so it should in theory be more efficient at mid-high rpms.  Once I enable lean highway cruising in the tune it should get even better.

Only issue right now is that it's been stalling once warmed up but I think I figured that out so I'll find out later today.  I think it tries to go into single fire mode when idling and that's causing the stalling.  Disabling single fire mode will hopefully solve the problem.

Oh and since I still don't have an upper dog-bone mount I'm driving pretty conservatively right now.  Hopefully I'll be addressing that on Monday.

Tuning is just about done. I'll probably set up a nAst1
tune and a regular A1 tune just because the nAst1 has a few
glitches here and there. It's great for tuning with
though.

This engine is just begging for a 5 speed swap! Maybe I'll
get around to that by late summertime.

Had some good fun at the SISLA event today. Best time
ended up being a 6.489 @ 62.27 MPH. Didn't break any
transmission mounts and did some light burnouts. Wow
it's really easy to get a good launch with these cars.
With some better tires I could probably shave another
1/10 of a second away. I thought it was pretty awesome
beating most of the V8s in street class and also having
one of the most quiet cars there. It's a 384-foot track.

On the other hand a brand new Shelby GT500 crashed on its
first run...



And I snapped a pic of my dog-bone mount and the car with
the stock wheels now painted satin black:

Yes it's not an 1/8 mile track it's a 384 foot track.
Sorry for the confusion.

To get a 5.7 330 you were cooking along really well.  I am impressed.

Very cool. Lotsa fun! Engine sounds good!

 

Chay