I have been building this car for years with many challenges and changes I have been driving it on the street for a little while trying to get a decent enough tune in it I finally got to the track this week. I was nervous, for my first time out, but had good people coaching me.
I Learned a lot. How to heat up the tires, stage, all that stuff.
I am happy with the results and hope to have at it again.
Runs in order 10.48@119.18 went right and left off Went right again
10.22@140. went right again but got on it again
9.831@141.58 adjuster the ladder bar
10.22@140.24 injector duty cycle at 100% (yikes added more fuel pressure to compensate for now New injectors to install
9.765@138.98 Rich condition up top
9.835@139.20 popping
9.790@127.41 mis-fired or tune /injector issue and let off
Great fun
I am looking for any advise for a newbie ?
1. I wrote on the back of the time slips some of the adjustments that we made... but a log book looks like a better idea
2. good suggestion from a fellow racer to pull a plug at the end of the track and replace with another on my drive back to get a better read on the plugs
Other ideas???
1970 Barracuda Convertible 1968 Satellite Street Strip car 1654.5 Mustang 1955 Land Rover
Re: First time Out at the Track! asking for some advice
[Re: Kam*Kuda]
#2361526 08/29/1702:08 AM08/29/1702:08 AM
Log book is a good idea. Also grab a cheapo thermometer. Only make one change at a time. Develop a starting ritual and don't deviate. Is your hood scoop sealed to the throttle body? I don't know why you would develop a rich misfire. Would have to be extremely rich. Check for valve float, rev limiter, plug gap, are your plug wires zip tied together or spread out?
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Re: First time Out at the Track! asking for some advice
[Re: sgcuda]
#2361568 08/29/1708:49 AM08/29/1708:49 AM
What efi system are you using? Curious because some systems really can cause chaos if duty cycle goes static. Are you sure you're not just over fueling the program at higher rpms? If you can look at pulsewidths in your fuel table, make sure at each load point that your pulsewidth doesn't increase once you get past peak TQ rpm.
Last edited by TRENDZ; 08/29/1709:35 AM.
"use it 'till it breaks, replace as needed"
Re: First time Out at the Track! asking for some advice
[Re: sgcuda]
#2361607 08/29/1711:12 AM08/29/1711:12 AM
Log book is a good idea. Also grab a cheapo thermometer. Only make one change at a time. Develop a starting ritual and don't deviate. Is your hood scoop sealed to the throttle body? I don't know why you would develop a rich misfire. Would have to be extremely rich. Check for valve float, rev limiter, plug gap, are your plug wires zip tied together or spread out?
1. One thing at a time is very good advise 2. The hood is not sealed and it just has the air filter sitting on an elbow 3. We maxed out on the injector I did not expect to make the boost numbers that it did. The procharger is turned way down 4 some wires are together 5 valve float, hmm didnt thought of it. We didn't expect 15 lbs I was aiming at 8-10 lbs I will check on what springs were used
1970 Barracuda Convertible 1968 Satellite Street Strip car 1654.5 Mustang 1955 Land Rover
Re: First time Out at the Track! asking for some advice
[Re: bonefish]
#2361609 08/29/1711:16 AM08/29/1711:16 AM
looks good!! was there a thread on your build? id like to know more about your procharger set up.
Its a 500 inch 8.5 compression Indy Ez heads with a little clean up and a F1X procharger small crack pulley tooth (7 inch) and 44 tooth on the head So it reva at around 56000 rpm The max for this supercharger is 72000 rpm It can certainly be bumped up a lot!
1970 Barracuda Convertible 1968 Satellite Street Strip car 1654.5 Mustang 1955 Land Rover
Re: First time Out at the Track! asking for some advice
[Re: TRENDZ]
#2361619 08/29/1711:36 AM08/29/1711:36 AM
What efi system are you using? Curious because some systems really can cause chaos if duty cycle goes static. Are you sure you're not just over fueling the program at higher rpms? If you can look at pulsewidths in your fuel table, make sure at each load point that your pulsewidth doesn't increase once you get past peak TQ rpm.
Its a fast XFI program
It had 83 lb injectors and a 2 bar sensor
I will be adding 120 lb injectors and change to a 3 bar map sensor And then we will need to remap everything
Do you have any suggestions on keeping datalog and program files?
I like to save all the table with a specific name and then name the datalog file the same same for comparison
It makes for a log of files but I find it easier to compare
Last edited by Kam*Kuda; 08/29/1711:37 AM.
1970 Barracuda Convertible 1968 Satellite Street Strip car 1654.5 Mustang 1955 Land Rover
Re: First time Out at the Track! asking for some advice
[Re: Kam*Kuda]
#2361661 08/29/1712:41 PM08/29/1712:41 PM
Not really, look at the requirements and make sure you know and understand all the steps and practice as needed to past each one the first time as tested On the safety gear like the suit, gloves and neck collar looser may be better than to tight, depending on how you like them On the hat make sure it is snug, not loose and make sure and tighten the chin strap before pulling the car out to of the burn out I try to make sure and pull the shoulder straps down tight before pulling out of the staging lanes also I have for gotten more than once, luckily I didn't crash the car and get beat up from the loose straps
Last edited by Cab_Burge; 08/30/1704:40 AM.
Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
Re: First time Out at the Track! asking for some advice
[Re: Kam*Kuda]
#2362168 08/30/1707:20 AM08/30/1707:20 AM
Changing one thing at a time is the right way to go, unless you have data to tell you exactly what needs to be done, and you can varify independent results for each change, like using a data logger system.