928man

I have an 86.5 US Version auto, would I gain much in performance with the autoauthority chip, if so how much HP?

Landseer

Outdated, poorly designed maps, gas hog, don't do it.
http://reutterwerk.com/forums/showth...t=porken+chips


On a separate but related subject, have you replaced your car's fuel lines?

928man

No, I haven't replaced the fuel lines, just got the car a few weeks ago, why did you mention it?

928man

By the way I've got an 80 Euro-S 5spd too, headers, carelli bodywork looks like an S4 but with front fenders from older model. The euro-S 5spd seems much faster than the 86.5 auto, whats your experience?

Landseer

Not sure yet. Just got the Euro S. Seems very strong. It has MSDS headers and little in the way of mufflers, so I can't tell yet about the power because the sound is overwhelming.



I mention the fuel lines because the chips can be setup to use the later fuel regulator which adds about 40% more pressure to the system. If you do that on old fuel lines its suicide.

But more importantly, the number of 80/s cars, and particularly 928s and 944/51s that have burned on the highway due to fuel lines is so high I'm surprised the NHTSB hasn't waved them to the side of the road.

Seriously, they look good on the outside but are failing. Replacement hose is available from the suppliers here. You have to choose the right hose for the pressure and radius, and this is also an issue, so my advice is buy and install a kit of hoses, then consider chips later.

928man

Thanks for the tip on the fuel lines, will do, let me know what you think of the Euro-S as you run it.

danglerb

Seems like a lot of the 85/86 cars already have AA chips, so you might already have them as well. Porkens chips seem to be far advanced compared to AA. www.liftbars.com

Mike Frye

Don't go with Autothority chips. I had them in my car originally. They were originally programmed back in 87 or 88 I think and since then no one has opened up the code to see how it did.

If your car is otherwise stock, it will do great things. If you add a set of crossovers and high flow cats, you'll have to watch out when driving on wet on-ramps because the torque will spin the tires.

Other things to consider that are cheap HP:
Crossovers
'87 FPR with Porken's s300s chips
'87 FPR with Porken's s300s "Racer" chips (requires NGK non-resistor plugs)

Before all of this I would definitely recommend that you do the normal maintenance and go through the LH/EZF test plan and make sure everything is adjusted properly and is up to spec. Replace the fuel lines with a kit from Roger at 928sRus even if you do nothing else. Do not wait until you have an indication of a problem with the fuel lines. The first symptom is a burned up car.

Good luck and keep us posted.

Larry Velk

I don't know about power, but I do know driveability. Have Authorities in my US 86.0 and when I put them in - noticed no real difference. On the other hand - '87 FPR, 4 hole injectors and lean out the MAF, now that made it drive better at lower rpm. Car drives much smoother just after clutch engage. I think these 4 holers are more important with sticks as you let out the clutch and feed in gas on takeoff.

calrcm

Porken Chips are the way to go!

James-man

272 rwhp with rear muffler bypass. Not sure what the baseline was. Funny thing that. When I first installed a bajillion years ago, a friend and I tried to baseline without a dyno (before GPS technology) and tried 60 - 80 acceleration times before & after AA chip install, but couldn't get any reliable, meaninful data showing improvement.

I noticed an improvement on the low end lag with AA. Once it hits a certain RPM it takes off. Off the top of my head, it is somewhere between 2500 and 3000 rpm. Not so sure this torque lag thing is so noticeable in an automatic.... shouldn't be wih kick down and all.

James-man

This sure seems to be the case. Fantastic results have been posted here.

Rick Carter

Go through the car with someone who knows these cars well and bring everything up to factory specs before making any changes, you may not have any money left over for "improvements" but you will have a more reliable enjoyable car. Stock, these cars are still awesome. Do a search on kick down switch and ask the other AT guys for their advice, this will make a bigger difference than chips. When everything is well sorted out contact Porken.

928man

Is that a turbocharger or supercharger on your 85, must pump out some horsepower? yes, going to replace t-belt/wp, fuel line replacement, brakes,A/C. Car is in nice shape red/blk int. 67k miles, slotted wheels/rear A/C, sunroof. Drove it up from N/C 650 miles, never missed a beat. I noticed 32V engine is much smoother running than the 16v 1980 Euro-5spd 1986.5

Landseer

Throttle position sensor, TPS, operation is also important to check.