Clearly written, and wrong in it's findings just the same.

Pushed beyond the limits of their knock sensor controls is just plain wrong. A knock sensor is given command priority, that is it's given precendence over other inputs including the chip held maps.

Now, those $35.00 chips sold on eBay may include overrides on the knock sensor priority (assuming that's possible), but only a fool programs those, and a bigger fool buys them.:D

Here's Turner Motorsports website for BMW engine chips by Jim Conforti. They're the best in the business for bimmers, for Motronics equipped engines. There's a rich body of knowledge out there written by Conforti over the last five to 8 yeaers, including vast amounts about what chips can and cannot do.

The same information applies to well programmed Porsche chips.

So how did Porsche bump up the3.2 HP from 1986 to 1987? Didn't they remap the chip?

They remapped the chip. I don't know if all the horsepower came from the chip/DME change or if Porsche changed their stated hp figures on paper. Remember, Porsches stated horsepower figures are minimums.

For example;
Suppose prior to 1987 any motor that made less than 207hp on the dyno went back to be reworked. If they discovered that all the motors were making 210 hp anyway, they could, if they wanted to, raise the stated horsepower by 3hp to 210. Now suppose that happened AND they changed the chip mapping to give it another 7hp we'd get 217hp.

-Chris

Bruce Anderson once said all 3.2s were essentially the same HP and performance...regardless of HP claims.

Certainly the 84-85 ( 86?) cars were mapped for USA 87 octane fuel...whereas the later cars required higher octane ( 91?) and theoretically made more hp. Smart tuners today use the same principles in getting a smidge more hp or drivability....and it won't blow up our cars if done carefully and with discretion....

Wil

Sure are lots of "modified" 911 3.2 Carrera's out there running god knows what chips from the late 80's and 90's with 100k-200k miles on them and they finally blow and get a rebuild...

So the engine blows up and I get a rebuild or a 3.6 - What am I missing? Uhhh so. Who cares. 10k? Big deal. Most people chipping their late model Carrera's have some disposable income and are looking for a reason to mod.

Let's dig up all the thread from this board that relate to engine failures due to chipping them...How many you got?

It's kinda like one day we all know we are going to die but between then and now I just want to pack in some living...I think a chip does just that.

Next topic? (Yawn.......)

NO KIDDING!

There's a bit of misinformation in this information...

Sure 45 or 50 degrees of timing sounds like a lot, but that only applies at WOT. During part throttle conditions, engines can handle much more timing than "what Porsche techs consider the maximum advance". So comparing max WOT is really more important.

A decent rule of thumb is 1 degree per octane point, but as with most things, you will reach a point of diminishing returns...

I haven't found the conclusive answer, but Bosch introduced a newer version of Motronics, version 1.3, that was inherrantly faster and raised the horsepower and allowed higher compression on nearly all engines on which it was used. BMW began using it on e32 7-series built in April of 1987, prior to that, version 1.0 was used on e28 5 & e23 7-series, and 1.1 was used on their eta engines, time wise that was from about 1983-late 1987 (on certain models). With the introduction of the e34 5-series for the 1989 model year, Motronics 1.3 was used across the board until 1992 when the M30 3.4 liter six was phased out.

Just guessing, Porsche began using Motronics 1.0 slightly earlier, probably because their small size allowed them to change to it quicker than others, and they may have employed 1.3 earlier as well.

where's the fun in this discussion? when does the poop start being flug about?

I was under the impression that Conforti was responsible for the Cyntex porsche chips and if you dump them (surprise) they are no different from anyone elses aftermarket chip (good or bad).

Similar to what I wrote here:

http://www.pelicanparts.com/bmw/techarticles/Mult_Chip_Install/Mult_Chip_Install.htm

As I state in 101 Projects, the installation of a chip is a good way to gain a few extra HP. Compared to major engine mods, it's a good bang for your buck. However, too agressive a mapping may indeed produce harmful detonation in your engine, which will slowly hammer it apart from the inside out.

I believe that there are some nominal gains to be made from a more agressive mapping of the chip, but not too much. Porsche designed the chips for all types of conditions. The fact that the 1984-89 Motronic system doesn't have a knock sensor means that there's room left on the table for some power gains - at the risk of causing detonation. Later versions of the Motronic system will run as advanced as possible (in general) until the sensor detects knocking. You could conceivably run a larger advance if you're going to be running 94 octane or higher all the time (or if you run twin plugs).

-Wayne

I really don't know if Jim Conforti developed Porsche Motronic chips for marketing by others
, but if he did, they'd likely be among the best.

I don't dump chips, while I know what you mean, why waste your or my time?

About a month ago, Loren was given a 3-day "vacation" from the Pelican BBS because of a particularly poorly worded post on another thread. After previous numerous requests for him to "stop fanning the flames of war" I got a little weary of all the complaints and decided that he needed to take a break from the Pelican BBS.

Loren is more than welcome here on the BBS. My rule of thumb is if you cause a lot of problems and trouble for me, you're going "to take a break." Loren apparently didn't appreciate this imposed "vacation" and thus became a bit sore at me. I suspect that in time, he will return in full force.

-Wayne

Having met Loren this weekend at the POC Tribute, I can say with 99.9% certainty that he is sitting back and laughing his !@# off at some of these posts.

He is a good guy, he's just having fun with some of you who take things a little too seriously. Hell, he got me in a pretty good lather a few months back as well when building my motor. It's just his way of having fun I guess.

Why he wastes his time just stirring up trouble I don't know (or care for that matter), but some of you guys just routinely take the bait, over and over again.

I really can't figure out though how he rationalizes that this can be good for his business.

Ralph

So Loren got a time out?