Fuel System Computer

[shooter2]

I am sure some of the guys on this site have used a weather station to help tune there engine. Mel(my boat owner) gave me to figure out a Barry Grant Sportsman weather station kit. What I need to know is how the hell do I use it????????? We have never used it before but want to build a library of data to help us make the right tuneing decisions. Yes I think this means we are getting serious.

Brian

[Flatmvn]

uhmmm maybe try the instructions. ;):D:D

Don't mind me just having some fun, I have no clue.


Louis

[RiverRacer]

Brian, all ever used is a Density guage it takes in any factor, the air gets better or it gets worse, when I ran brackets I could keep the times right there from early morning to late afternoon, I kept a log and all I had to do is look at the guage, look at the log and changed the pill/timing accordingly!..

[hydroguy]

Here's what stuck in my mind when I read this...."changed the pill/timing accordingly" Words like this keep me pressing onward toward a change to fuel injection. It's a heck of a lot easier to change a pill than to fumble around on a pair of 4150's or Barry Grants like mine trying to fish out a jet change twice a day!

[RiverRacer]

Here's what stuck in my mind when I read this...."changed the pill/timing accordingly" Words like this keep me pressing onward toward a change to fuel injection. It's a heck of a lot easier to change a pill than to fumble around on a pair of 4150's or Barry Grants like mine trying to fish out a jet change twice a day!

No shit, I used to piss a lot of guys off I'd have changed the pill before they had the bowl screws off one bowl, LOL!.. :D

[shooter2]

It is a Crower fuel injection system, so changing pills is a breeze. Basically what this little pocket computer does is tell you which pill to run. However the trick is to get the tune up first. Once you have the tune up down all you do is plug in your variables. Altittude, barometric pressure, temp and air density. It then calculates the pill that keeps your set up the same. I know of two guys that swear by these, Norm Woods, owner of the Gambler, Can Am 1, and Steve Kew, owner of gp5. Both used the same system and saved them alot of greif. And I wish it came with instructions. Checked out the BG web site, no luck.

Thanks Brian

[RiverRacer]

Yeah, they sure work great but costly, never had that kind of $$$$$ back in the day so I just made up a log book, had about 5 pages worth all I did was watch the Density guage then look in the book for appropriate change from previous times!.. !..

[PE 316]

I use one with my boat and the one I am currently "Crew Chiefing" on (8 sec. Drag Boat).
I have a computerized log of over 200 - 1/4 mile runs over the last three years of detailed information about the boat and the weather conditons for each and every run. The basic "Weather Information" that get inputted into the Weather Station "Computer" are Pressure Altitude, Air Temperature and Humidity %. With these three known pieces of data, the computer calculates CORRECTED Altitude and also Air Density. The Corrected Altitude or Air Density can be used to compare your "base line" set-up with the current weather (Air) conditions to make your PILL selection for your next run. It is VERY IMPORTANT to have a good set of gauges. Air Temperature and Humidity Gauge and a good ALTIMETER (I use my Garmin "Vista-C" hand-held G.P.S. unit as my altimeter). This particular GPS gives very accurate barometric pressure influenced altitude readings at any given time. I replaced the cheap altimeter that came in the Weather Station Kit with the GPS because the cheap altimeter only gave readings every 25 feet and the graduation lines on the face of the altimeter were so small, no two people could walk up to it and note the same altitude reading at the same time. We also did the same with the Temperature and Humidity Gauges. We switched to a Digital Thermo-Hygrometer like this one : http://www.jegs.com/p/Computech/747434/10002/-1/10571for the same reasons. Here is a link to the instructions for the gauge: http://www.jegs.com/InstallationInstructions/200/248/248-3002.pdf


Always remember to take your weather condition information in the same place at all times (away from the exhaust of race vehicle, portable generator, etc... and NOT in direct sunlight). Always use the same equipment (temp gauge, humidity gauge and altimeter) to record your weather conditions. Different gauges may read different temperatures, different humidity% and different elevations. You want to keep your weather recording information as standardized as possible. For example, some people record their weather information in the shade at the edge of the water, some record their weather information at the back of their tail-gate at the in-ramp, some record their weather information in the shade of their pit space, some (myself included) record their weather information from the same spot inside their enclosed trailer (open on two sides to provide adeqate air movement). Whichever way you decide to do it, just make sure it is done the same way every time. YOUR results (Corrected Altitude and/or Air Density) will read different than that of your pit neighbor/buddies. The important part is this is YOUR information and you use YOUR data, recorded the same way every time, for YOUR log-book and you should be successful with your engine set-up (predictions) given changing weather patterns from day to day or run to run.

[shooter2]

I use one with my boat and the one I am currently "Crew Chiefing" on (8 sec. Drag Boat).
I have a computerized log of over 200 - 1/4 mile runs over the last three years of detailed information about the boat and the weather conditons for each and every run. The basic "Weather Information" that get inputted into the Weather Station "Computer" are Pressure Altitude, Air Temperature and Humidity %. With these three known pieces of data, the computer calculates CORRECTED Altitude and also Air Density. The Corrected Altitude or Air Density can be used to compare your "base line" set-up with the current weather (Air) conditions to make your PILL selection for your next run.

Mine is a BG system. Sportsman Weather Station Kit Drag Race p#130071. It come with a Barometer and a thermometer/Humidity lcd display. The pocket computer is a Sharp pc-1270. The RAM card is a BG FUEL SYSTEMS PROFESSOR II. Is this similar to what you have? Am I even looking at the right stuff?????

The boat is a Can Am/PS boat with a 500cid bbc crower injection on Methanol

Brian

[shooter2]

I just read the rest of your reply, thanks its great!!

Brian

[PE 316]

Mine is a BG system. Sportsman Weather Station Kit Drag Race p#130071. It come with a Barometer and a thermometer/Humidity lcd display. The pocket computer is a Sharp pc-1270. The RAM card is a BG FUEL SYSTEMS PROFESSOR II. Is this similar to what you have? Am I even looking at the right stuff?????

The boat is a Can Am/PS boat with a 500cid bbc crower injection on Methanol

Brian

Brian,

That is very similar to the one I use. However, my Sharp PC-_ _ _ _ is set-up for a "Blown Boat" application. It has additional programs built in for "Recommended Boost%", "Pill Selection", "Prop Slippage", "Theoretical Top Speed","Hull Effeciency", etc...

Mike

[shooter2]

Mike:

Thanks for the help. Now that I got it to turn on I have more questions.

The first question that is relative to me is Nozzle Area, what is that? Are they just asking for the nozzle size?

The next one is Quan Orfices. Is this the number of ports, in this case 8. If that is what they are asking

Base pill. Ok not to worry I understand that one lol
I have yet to find where I plug altitude into the equation. On the pocket computer it looks like there are two functions that I am after air correction and tune up. Well this is where I am right now any help would be great.

Thanks Brian

[shooter2]

Here are some pics of the boat, maybe if I can figure out how to do it. lol. Aw hell maybe professer Art can do it, cause I cant seem to.

[RiverRacer]

Now why did I know that was coming, LOL...:D:D

[PE 316]

The "Total Nozzle Area" should be supplied once you have your fuel system flowed.
(That is where I got my information from anyways) This is a number I have written down inside the trailer (that I won't see until Red Bluff - Memorial Day Weekend).
I don't remember my program asking for Quan Ports. In my case, I would input the number "16" (8 hat & 8 port nozzles)...

[RiverRacer]

Here are some pics of the boat, maybe if I can figure out how to do it. lol. Aw hell maybe professer Art can do it, cause I cant seem to.

Here ya go, just needed to resize them that's all!..:D

http://img167.imageshack.us/img167/6841/dsc00178ry9.jpg

http://img167.imageshack.us/img167/1095/dsc00180lb9.jpg

http://img167.imageshack.us/img167/8836/dsc00183il8.jpg