DRACO A5OG

Whoa, that is slick. Sorry to be such a Neub but what is the basic function of the device.

For tuning for the Track?

DRACO A5OG

Hey your a funny looking asian? Wait a minute are you Steve Wong?

rberry951

Agreed, with a side note. I know what the book says, and what most people said, but I did a lot of experimenting and found that 14.2:1 was the best AFR for me, on my car, in my climate, on a 50something degree day. High humidity.

Anything below 13.8:1 left my plugs a little dark, and exhaust smelled a little fat. At 14.2 I had clean plugs, and a nice crisp CO smell with smooth idle, where as going up to 14.7:1 gave me white plugs, off-idle hesitation, and near odorless exhaust. But a pungent exhaust when the cat was on it.

Just my observations...

Regards,
Russell

DRACO A5OG

Hey Rusnak,

I would go with the expert and try 14.2 and see how she feels.

I was just going by the Bentley Manual page 200-7 but I have to agree the actually real world results are more accurate in my opinion.

Amber Gramps

Well, rnln sorry about this but I gotta stand you up. An order missed the truck and I have till 5:00 to make the customer happy. See you guys later................................

rberry951

The Multi-board doesn't provide for tuning, just selection of up to 8 different chip images. It's a simple little device really, I'm quite surprised no one has offered it before, there may even be something generic out there for the industrial world.

I did design a tuning tool that allows you to tune the car live, while it's running. When I first came out with the 911MAX chips people were taken aback by how quickly I did it. I could do it quickly because of the superior tuning tools I designed. I built these things for me, and sell them to others who have the same need.

Maxtune is a program that runs on your laptop, which gives you full access to the fuel and timing maps, which are stored in an Eprom emulator, which in turn is plugged into the DME chip socket. It too can hold up to 8 different images, and has a LED lit remote switch selector. But the beauty of the system is the tuning capability, you tune the car live, on the dyno, or driving around. (with a driver of course!) Here's a couple of screen shots of the stock 3.2L fuel and timing maps.

Regards,
Russell

rusnak

WOW! RB, you have some nice products! And to think, a few days ago I didn't even know about your company. I need to read up on it tonight.


Draco, and RB, thanks for the input! I'll adjust to 14.2 at idle w the O2 sensor disconnected. I just got a second bung welded into the cat bypass, so now I can also do a check with the O2 enabled for comparison.

rusnak

RB, I thought of a question that I've always wanted to ask:

I drive my '84 911 a lot between the coast and the mountains. The use is mainly for touring and weekend drives. I can't always get Chevron gas, and sometimes have to buy gas at sketchy looking gas stations. Also, in the summer it can get up to 112F to 115F and in the winter it can get as low as 32F. So, for a combination of street, highway, high and low altitude driving, in hot and cold temps, can I still use a performance chip (Max HP for example)? Is there enough margin left in there for safety? How exactly are performance gains achieved? Timing? AF ratio?

rberry951

For safety reasons, I leave a lot of factory functions alone. So the IAT sensor in the AFM will adjust timing in high temps. As long as you run at least 91 octane fuel, you'll be fine. These aren't race chips, they are designed for the street, with crap gas and varying temps in mind.

More power is had from tuning the timing and AFR, under varying conditions. I would take my car to the dyno several days in a row, every time going back to the original tune to start with, and going through the exact same procedures. What this netted me was a best 'all around' tune, which left a safety margin, and alloted for different environmental conditions. Likewise I would tune on the street, and do so again under varying climate conditions. Scott, (stay6) who started the other thread entitled 'New chip install' has an 84 as well.

The 'tuning' procedure also varies from car to car. On a normally aspirated 944 for instance, the basic procedure is tune the fuel for all rpm ranges, then throw timing advance at it until it stops making power, then come back a tiny bit for safety margin. Seldom a need to go back and re-tune the AFR. On the turbo cars, it's a long cumbersome dance back and forth between timing and fuel. With the 3.2L 911 the margin for timing advance is a very small window in comparison to other cars, so not a lot of head way to be had there, however minute fueling changes netted susbstantial differences. Bottom line, I have to say that in tuning these cars I found the AFR to be more of a factor in overall performance. I actually got to the point where I didn't have to look at my LM-1, I could tell what the AFR was by the sound. If one is just a little fat I can hear it, if she's running perfect, the rev up is smooth and clean and it has a sharp sound to it. And it smells good too...

Regards,
Russell

rusnak

That is an absolutely fantastic reply, with great insight. Thank you for your professionalism. I'm quite impressed.

rberry951

I'm happy to answer your questions.

And I should thank you, as nothing means more to me than positive recognition for my efforts.

Regards,
Russell

Lorenfb

Russell Berry
MAXhpkit -- Maximum Performance Guaranteed

You need to promote this over on the "Dark Side", as most over there think
that there's a supreme "God's Gift to Tuning" (who now believes it too).

Amber Gramps

rusnak, your driving sounds a lot like mine. One weekend will be a drive down to San Diego and the next will be a run up to Lake Arrowhead. Lake arrowhead is at 5,100 feet. I've never noticed a drop in performance at that level even on the hottest days. My last drive up there was with Spencer in the passenger seat. Anyone that visits RLOT knows that was a 225 in my seat and well beyond 225 in his. Not exactly a light load yet at 5,000 feet Spencer was crying for his mama as we approached the lake. I don't think we have any issues with altitude and chips.

rusnak

Spencer from Partshaven Spencer?

Ed Hughes

Hmmm, I'm kinda interested in the multi-chip setup. That would allow me to run a stock map on longer drives where my 100/91 brew may be a problem and I have to run straight 91 for some reason.

This will be on my "interest list" after I get through this next round of suspension improvements and decide on whether I'm going forward on a sailboat.