kghaas

Hi,
I have just rebuildt and installed a new motor in my car.
Spec is all Lindsey racing, with a LR 65 Super turbo, MAF and Mafterburner.

Car is running and, boost is incredible, but it runs way rich.

Can someone please point me in the right direction to what I should do to get this baby all smooth....

The TPS is as follows:
Engine off
No accel.: TPS 12 deg, 0,459 Volt
Full accel.(WOT) TPS 90 deg, 3,695 Volt

Sensor Values:
TPS key on: 0 Volt
MAF key on: 0,059 Volt
TPS WOT: 3,999 Volt

And log file from a run on the street:
http://spreadsheets.google.com/ccc?k...Kp72GJ1YeZ1kZA

I have been driving the car for about 200 miles, and the AFR is reading between 10.5 to 11.5 on cruising.
On boost it seesm ok, with AFR at 12.5-13.x

Someone please give me some gidance here

And this is the car:

porschefig

The advice you're about to recieve is from an amatuer but it worked ok for me!

Start the car up and adjust the values so it idles at 14.7 (does your car run an Oxygen sensor?). Then, what I like to do is start a datalog and Slowly rev the engine up while I'm parked. Then look at the voltages and adjust everything so that it's at 14.7 up till ~4000 rpms, then taper it to a bit richer in the higher rpms (with my stock 26/6, my car will apparently make ~7psi, 0.5 bar boost while free revving).(might take a few tries!!)

With that done it should cruise along at very near to 14.7. At this point I let a good friend drive at various rpms on a quite road while I get everything to 14.7.

Now, I'm ready to tune with some boost. I'll start a datalog (friend still driving) and accelerate till I have just a few psi of boost then end the datalog. We then redo that a couple times and increase the rpms that the runs end at until we can do a full run to redline. (it's hard to find a road this quiet!!) What I aim for is to get about ~13.0 at 0 psi, tapering to ~12.5 by ~7 psi, to 11.8 at full boost (~15-16 psi for me).

BTW: I log boost with my Zietronix ZT-2. If you don't have a way to log boost you'll have to keep a careful watch on the gage!!

Mike Lindsey

We are tuning cars on turbo944.com. Why don't you stop over there and get started.
We can do it for you.