VETDRMS
15+ Year Contributor
- 340
- 21
- Jun 1, 2006
-
Vancouver,
Washington
The title should probably be "result," but more on that later.
I finally got the old bird down the track on E85. It has been running well for a while now after getting it back together so I wanted to go make some shakedown runs on Saturday and see where it was at before turning it up.
The whole build thread is here which has all the details: 2.4 Auto Build
I have been doing some back road pulls and everything looked good, AFRs were spot on at around 24psi so I thought that would be a good starting point for the track night.
With 3/4 tank of gas the car with me in it was 3650lbs on the scale. I have done absolutely no weight reduction and I left the spare, small tool kit, gallon of washer fluid in it to keep its true street weight.
The original goal was to keep power everything, AC, ect. and have a true 11.5s street car. My wife primarily drives the car so it couldn't have any driveability issues.
The weather was great on Saturday in the 70s, but it was a little windy. A friend came down to the track to spectate and it looked like it would be a great night. Turnout was pretty good.
I left it set at 24psi for the first pass. Prior to the first pass I was explaining to my friend that I would make a couple passes lifting after the 1/8 to see how it felt and just in case it was under 11.5.
Unfortunately my first opponent was a bright orange Mustang. I didn't start the stall until fully staged so it took a few seconds and I wanted to do a pretty soft first launch. As soon as I saw it pass 3500 I let it go and it felt decent but nothing great. It felt like it was pulling pretty good but my butt dyno didn't think it was going to be a spectacular run, probably low 12/high 11.
Despite the ~3s head start I was pulling on the Mustang hard and for whatever reason I just couldn't lift (bloodlust?). I wasn't sure where the run ended mph wise but I was at about 8000rpm in 3rd through the traps.
I came around to get my slip and a rather stern looking lady gave me a dirty look and said you need to go to tech...great.
Looked at the slip and it was 11.300 @ 121.52!
Entire Slip:
60' ET: 1.730
1/8: 7.308 @ 97.96
1/4: 11.300 @ 121.52
Fantastic!, but way to blow my wad on the first shot. I drove back to tech to get my warning and while filling out the form I saw my wife and buddy come walking up laughing. My wife said to my friend as soon as she saw the Mustang "ut-oh, he's not going to be able to lift.."
Average boost for the run was 24.5psi and pretty stable. I turned the boost down to around 20psi and was going to make a few more passes to tease the 11.50 line and work on the 60' but someone blew a transmission shortly thereafter and made a big mess so we decided to pack it in for the night and go have diner.
Attached is a log and pic of the slip. For some reason it was lean the whole run and fuel pressure was a bit erratic. I haven't seen this in my testing and I went back out yesterday to make some pulls and everything looked good. Also, there was about 1* of persistent knock in 3rd gear. The ramp rate is pretty aggressive starting at 5500rpm so I backed it down a bit in this area and its gone, but the timing is still pretty conservative.
It spun a little out of the hole, I was surprised the 60' was 1.7. The 6-year old Advans aren't very sticky when cold and I left the pressure at 32F/29R.
Despite all the headaches I couldn't be happier with how this has come together. I really wanted to try this combo and IMHO it makes a great street car. I thought the BEP .55 housing would be choking the 2.4 but it was pulling hard all the way to 8000rpm and boost really isn't dropping off. For now I am using the stock shift points (7000rpm) so there may be some gains from running it out a little more before shifting. It's moving for a big heavy pig.
Feel free to poke through the log, any advice is appreciated.
If the weather holds out I will take it back out on Friday and make some lower boost passes before going for the end of season glory run...
I finally got the old bird down the track on E85. It has been running well for a while now after getting it back together so I wanted to go make some shakedown runs on Saturday and see where it was at before turning it up.
The whole build thread is here which has all the details: 2.4 Auto Build
I have been doing some back road pulls and everything looked good, AFRs were spot on at around 24psi so I thought that would be a good starting point for the track night.
With 3/4 tank of gas the car with me in it was 3650lbs on the scale. I have done absolutely no weight reduction and I left the spare, small tool kit, gallon of washer fluid in it to keep its true street weight.
The original goal was to keep power everything, AC, ect. and have a true 11.5s street car. My wife primarily drives the car so it couldn't have any driveability issues.
The weather was great on Saturday in the 70s, but it was a little windy. A friend came down to the track to spectate and it looked like it would be a great night. Turnout was pretty good.
I left it set at 24psi for the first pass. Prior to the first pass I was explaining to my friend that I would make a couple passes lifting after the 1/8 to see how it felt and just in case it was under 11.5.
Unfortunately my first opponent was a bright orange Mustang. I didn't start the stall until fully staged so it took a few seconds and I wanted to do a pretty soft first launch. As soon as I saw it pass 3500 I let it go and it felt decent but nothing great. It felt like it was pulling pretty good but my butt dyno didn't think it was going to be a spectacular run, probably low 12/high 11.
Despite the ~3s head start I was pulling on the Mustang hard and for whatever reason I just couldn't lift (bloodlust?). I wasn't sure where the run ended mph wise but I was at about 8000rpm in 3rd through the traps.
I came around to get my slip and a rather stern looking lady gave me a dirty look and said you need to go to tech...great.
Looked at the slip and it was 11.300 @ 121.52!
Entire Slip:
60' ET: 1.730
1/8: 7.308 @ 97.96
1/4: 11.300 @ 121.52
Fantastic!, but way to blow my wad on the first shot. I drove back to tech to get my warning and while filling out the form I saw my wife and buddy come walking up laughing. My wife said to my friend as soon as she saw the Mustang "ut-oh, he's not going to be able to lift.."
Average boost for the run was 24.5psi and pretty stable. I turned the boost down to around 20psi and was going to make a few more passes to tease the 11.50 line and work on the 60' but someone blew a transmission shortly thereafter and made a big mess so we decided to pack it in for the night and go have diner.
Attached is a log and pic of the slip. For some reason it was lean the whole run and fuel pressure was a bit erratic. I haven't seen this in my testing and I went back out yesterday to make some pulls and everything looked good. Also, there was about 1* of persistent knock in 3rd gear. The ramp rate is pretty aggressive starting at 5500rpm so I backed it down a bit in this area and its gone, but the timing is still pretty conservative.
It spun a little out of the hole, I was surprised the 60' was 1.7. The 6-year old Advans aren't very sticky when cold and I left the pressure at 32F/29R.
Despite all the headaches I couldn't be happier with how this has come together. I really wanted to try this combo and IMHO it makes a great street car. I thought the BEP .55 housing would be choking the 2.4 but it was pulling hard all the way to 8000rpm and boost really isn't dropping off. For now I am using the stock shift points (7000rpm) so there may be some gains from running it out a little more before shifting. It's moving for a big heavy pig.
Feel free to poke through the log, any advice is appreciated.
If the weather holds out I will take it back out on Friday and make some lower boost passes before going for the end of season glory run...
