Nothing to update. Been fighting some issues, and now I think my O2 sensor is dead.. Every time I think I'm closer to go racing, something else comes up. Hopefully the O2 sensor will get me going back in the right direction, that "problem" had me changing numbers on the base fuel graph shooting for my Target O2 reading, but not changing the AFR, and just screwing up that fuel table. Hopefully I'll get it close and actually find a dyno shop to help "Tune" it. Seems that most in my area are "inside" and not willing to help since I'm running methanol. I'm patient, and frustrated, but still trying! I thought I'd be taking the car to a big race in Las Vegas Nov. 18-21, even set up a pit spot, but this combo has too many new things that I don't have a handle on, so I canceled those plans. Gary G
Sorry to hear that Gary. Keep at it brother it will come around. Have you considered getting a base tune from someone to get you pointed in the right direction? The o2 issue aside, would the learning function on the ecu help dial in the fuel table if you had a solid base tune?
Gary, If you have a base tune in it, it starts and will rev up, and once your confident of all your sensor input, then simply go out and make several progressively faster passes with it, and each time, dump the learn table into the fuel curve. The system is designed to learn what the engine combo wants, and I don't care who tells you what, no one knows what your car really wants for a fuel curve....I have gotten "tunes" from Steve Morris that I went back and reviewed the actual tune the motor wants, after the dyno session, to what my customer bought from Morris, and they were not even close. This was on the 1338 HP Pro charged Tomahawk we did. I got it to run in the shop, with all the inputs set correctly in the program, and then we took it to the dyno, for progressively harder and harder pulls to let it dial in the fuel curve. Timing curve is pretty basic, it will make the most power with the same timing it wants NA, the issue is keeping the heads on it, and staying away from detonation. That's the only reason to pull the timing back. You will have to use your discretion there, based on what strategy your employing to control detonation under boost. But to get the correct fuel curve, the idea here is to progressively add more power and boost, via the throttle pedal, until you work all the way up to WOT passes. After each pass, dump the learn table into the fuel curve, and the system will figure out what it wants. If you have mufflers, or an area where folks don't care, you can actually do a lot of this on the street. Any fantasy that your going to hit the track the first time, with a perfectly tuned setup, is just that.. a fantasy.. so don't wait around on that. Good luck JW
Well after fighting several issues, Bad Buick now has a “tune”, and can go do some racing! Gotta check the schedules at the local tracks and figure out a game plan! Half track passes and more data’s need before we “let her rip”! Been a long road, and still a long way to go……Mid 4’s in the 8th, gotta have goals!! https://youtube.com/shorts/fk7fDubCgrI?feature=share https://youtube.com/shorts/MD2AB58faro?feature=share
So I finally have an update! After 2+ years of “building” this new Procharged combo I was “ready” to go to the track. The longest drive on the car was about 10 feet in my driveway, and now gonna go test and tune this beast down the 1/8th mile track… Anxiously Nervous was the feelings I had.. Car is a beast, makes tons of power, and could humor myself and “agree” with what spectators were saying, “just too much power!”..But realistically track was probably not well prepped, tires that are 2 years old are now bad, and hanging 100+ pounds of blower over the nose, killed the weight bias.. 3 attempted passes, all started with tires up in smoke, and when rolling, just spinning…. Pulling timing, adjusting launch rpm, never a clean “A to B” pass.. Then more problems, the blower just makes all the bolts get loose! Header bolts backed out, blew the gaskets, damaged an already helicoiled bolt hole, and a header collector tried to leave the car, header tube pulled out and got slightly damaged.. New tires, more tuning, and putting the car on scales to see the weight bias are what’s next.. Car looks good, sounds amazing, and has some serious potential! Probably take it back out in a month or so, and hopefully get more data to get the higher rpm tune correct. Video I have is pretty lame, I’ll see if I can post it…. Gary G
Congrats Gary for getting her to the track! That is a major accomplishment to say the least. Stay with it and I am sure she will come around. Jim
Glad to see you're making some progress despite some issues. You'll get there. Scaling will help for sure. I can't remember if you said but if it's a radial car it might like some weight on the nose.
Been a while since that last update.. I took the car to Famosa Drag strip in Bakersfield CA for a Test and Tune day.. What we’ve learned so far is that we need to “neuter” the car!! Pulling 17 degrees of timing out, and launching at 3400, launching in 2nd, was the first attempt that day. Driver screwed up, didn’t have the gas pedal floored (got data now, can’t hide anything), 60% throttle, and just running 1/8th mile, to the high gear shift, 1.39 60ft 6.39 to the 1/8…The following 3 pass we’re at 100%, track and air got hot, car would try to hook for about 1/2 second, then spin….. Last pass motor had a funny sound, found a pushrod damaged and then a broken rocker shaft… Cars back together, ready to run again, just not sure when or where…. Gary G
