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See the BS.com A/Fuel Team in Action This Weekend at Rt 66 Raceway in Chicago, Ill

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  • See the BS.com A/Fuel Team in Action This Weekend at Rt 66 Raceway in Chicago, Ill

    http://www.bangshift.com/blog/See-th...icago-Ill.html

  • #2
    Re: See the BS.com A/Fuel Team in Action This Weekend at Rt 66 Raceway in Chicago, Ill

    Our purpose of testing at Morocco was to establish an engine fuel curve, and see what our new valve train would do. We wanted to keep from dropping holes, and just get down the track with some bottom end power by the last lap.

    The first pass was set up very weak, just to get a rpm target and not smoke the tires. Hopefully we could get back up to speed, and also see what the track could handle.

    The ignition timing was set at 52 degrees at the launch, then went to 54 at .8 seconds. We had .072 head gaskets, 6.931 rods, which were .020 shorter than normal. We were around 12.2 compression, and 498 grams on the clutch with 1-1/2 turns of stall.

    The fuel system nozzles were 48/51 in all down stairs, and 40 except the 7 and 8 cylinders upstairs. We had a .112 main pill, with the BDK set up on the mild side as far as the programmable curve.

    We started with 50 lbs at the step, ramping up to 74 lbs at 1.2 seconds, then holding that until 3 seconds, then chopping down to 0 lbs at 3.2 seconds, a relatively basic curve, keeping the fuel weak at the hit to kill power, and to make sure it didn?t drop holes on the first lap. We needed to get down the track on the first try.

    On the second lap, we stepped up big on the timing, with 55 degrees at the step, and going to 57 at .6 seconds.

    We gave it more fuel by installing a .090 main to feed her 1.8 more gallons. The reason.....on the first pass, the engine just laid there at 4200 rpm on the first run with 22.8 gpm, which would only be 25.96 at 4800 rpm, and my target is 27.2 at 4800 rpm.

    We were hoping the extra ignition timing would help it with the newer load of fuel, and it should take it if we have it all correct now.

    On the third pass, we cranked up the ignition to 57 degrees at the hit, up to 60 at .8, and 63 at 1.45 seconds.

    We also went back up on the main to a 108 as the engine didn?t respond well to the fuel change, almost dropping two holes (3 and 4) early, with them they just laying there at 300 degrees.

    We put the fuel curve close to where we started but added only 7 tenths of a gallon, about half of what we tried the lap before.
    We also changed the clutch pack after 2 laps, with fresh discs and floaters.

    We removed 39 grams from the outside primary levers, hoping to keep the fuel curve happy, but make the engine hit at a higher rpm by unleashing the engine. The target was to get 26.5 gallons in at 4800 rpm at the hit.

    The car picked up, kept them all lit, but was still weak.



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    • #3
      Re: See the BS.com A/Fuel Team in Action This Weekend at Rt 66 Raceway in Chicago, Ill

      Day one is in the books at Joliet. In the opening session, we took it easy, made a nice clean pass, very conservative on tuning as it was the first full pass since our test last weekend. That run netted a 5.83/254. For the second session, we threw more fuel at it, and appeared to not drop any holes from our vantage point, but after further our return to the pits, the motor failed leak down. We pulled pistons, checked everything, re-lapped valves in both heads, and found #3 cylinder had a bent exhaust valve. Hopefully after a late night of double and triple checking everything, we have found the problem. Tomorrow it will basically be back to where we wanted to be on our second pass.....pending the weather. It looks like our final qualifying session will make it, the weather is supposed to be cooler, but rain is in the forecast for the afternoon.

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      • #4
        Re: See the BS.com A/Fuel Team in Action This Weekend at Rt 66 Raceway in Chicago, Ill

        Great update guys!

        That's a damn stout field you're trying to crack into. We've got our fingers crossed for the weather to hold out and for the car to haul ass!

        Brian
        That which you manifest is before you.

        Comment


        • #5
          Re: See the BS.com A/Fuel Team in Action This Weekend at Rt 66 Raceway in Chicago, Ill

          after looking at that pic maybe you should put that set of goodyears on. you got to get that wheel speed up! then maybe you can add the weight. i think that chassis can handle what ever you throw at it.
          Originally posted by TC
          also boost will make the cam act smaller

          Comment


          • #6
            Re: See the BS.com A/Fuel Team in Action This Weekend at Rt 66 Raceway in Chicago, Ill

            With some new lettering on the car, and a few new decals, the Veale & Brown Motorsports team, with driver Jeff Veale, and tuner Ethan Brown returned to competition at the NHRA Full Throttle Drag Racing Series event in Joliet to compete in the Lucas Oil Drag Racing Series. On the teams first Friday qualifier, the team elected to keep the same tune up in the car that they had in the final test lap at the Morocco test session, but increased the ramp rate from 0 to 1.0 on the bdk, to a softer 25 lbs ramping increase in the curve to 50 lbs. Ethan left the ignition curve alone, leaving on 57 degrees at the step, going to 60 degrees at .6-seconds, and to 63 degrees at 1.2-seconds. They also dropped the tire pressure 1 pound to 5.0 lbs. That pass yielded a 5.83/254. Not bad for an opener, a very clean, but soft pass.

            For the second session pass on Friday, Ethan stepped up the bdk map to start at 75 lbs, go up to 105 lbs, and hold it there until 2.85-seconds. It was then dropped to 50 lbs at 2.90-seconds, down to 20 lbs at 3.0-seconds, and down once more to 10 lbs at 3.02-seconds until the end of the run, making a total of 27.6 gallons per minute (gpm). The ignition timing was chipped to 58 degrees at the hit, 60 at .6-seconds and to 63 degrees at 1.2-seconds. 39 grams of weight was removed from the clutch fingers for a total of 459 grams. The car didn?t drop any holes but it didn?t respond well to the change as it slowed everywhere, netting a 6.04/240.

            On the third and final pass to make the tough Joliet field on Saturday morning, the team removed more weight from the clutch for a total of 430 grams. This was done in an attempt to get the engine rpm to wind up harder, and bring in a lot of plate load very aggressively at a higher rpm. This would still keep the engines head up, but would also sacrifice some wheel speed. The ignition was chipped the same as it was on the second pass.

            For the fuel system, Ethan ran with the same main pill, but took a different approach on the bdk control, starting at 25 lbs and ramping up to 75 lbs at 1.35- seconds, as he knew the engine rpm was going to rev up, have a lot more fuel pump, and more fuel early in the first half second of the run. With keeping the fuel bdk circuit light, it would also insure the engine would not drop a hole at the hit.

            Taking the information that Ethan learned from the first qualifying pass, the engine liked 25 lbs at the hit, but didn't like more than 75 lbs early, so that was his theory behind letting the car tell him what it likes and making the changes accordingly. The third pass netted a 5.93/244, while recording the weekend's best 60 foot time, the best engine hit rpm, and the best fuel curve on the data graph. The downfall was the car dropped the first hole in six passes, but is very fixable.

            While servicing the car, Jeff found a pushrod with the cup broken off, and that was the only damage we endured for the entire weekend. The team plan on sticking with the same tune-up for the third Division 3 event at Joliet this coming weekend. Ethan will pinch down the number five cylinder that we dropped, down to a 49/48 from 48/51. That's the first hole they have pinched, and the plan is to slowly start adding more fuel, run after run, until they can get it down the track, with less timing, and keep it firing on all eight cylinders.


            Following next weekend's Division 3 event, the car will be displayed at one of the team sponsor's events. Schepel Motor Group (www.schepel.com) will hold their annual custom car show on June 20th. They will display the car, and fire it up a few times on fuel for the usually large crowd attending the show. The following weekend, Veale & Brown Motorsports will head to Norwalk for the Summit Racing Equipment NHRA Nationals.





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            • #7
              Re: See the BS.com A/Fuel Team in Action This Weekend at Rt 66 Raceway in Chicago, Ill

              Not sure how much I understood of that, but very interesting. I had to re-read it a few times. Dumb guy question, clutch mass is a huge factor? I mean for a few thousand HP it's hard to fathom a few grams making a big difference. Will the clutch be a later feature of Brian's?
              Escaped on a technicality.

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              • #8
                Re: See the BS.com A/Fuel Team in Action This Weekend at Rt 66 Raceway in Chicago, Ill

                Zeee clutch is coming next week!

                Brian
                That which you manifest is before you.

                Comment


                • #9
                  Re: See the BS.com A/Fuel Team in Action This Weekend at Rt 66 Raceway in Chicago, Ill

                  whoo hoo!
                  Escaped on a technicality.

                  Comment


                  • #10
                    Re: See the BS.com A/Fuel Team in Action This Weekend at Rt 66 Raceway in Chicago, Ill

                    Originally posted by TheSilverBuick
                    Not sure how much I understood of that, but very interesting. I had to re-read it a few times. Dumb guy question, clutch mass is a huge factor? I mean for a few thousand HP it's hard to fathom a few grams making a big difference. Will the clutch be a later feature of Brian's?
                    i don't want to scoop brian....but i'll say 30 grams makes a difference...that is in a fuel car. in a blown alcohol 5 grams makes a big difference...
                    in an alcohol car you have 10,000 rpms
                    in a fuel car you have half that.
                    Originally posted by TC
                    also boost will make the cam act smaller

                    Comment

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