632C2
Well-known member
I thought I would bring those of you that are interested up to date on my DynoJet testing.
I am starting the runs out very conservatively to make sure everything is good. So far I have made 25 runs. I have already detected a problem with the fuel system that has required me to replace both fuel pumps between the first set of runs and the second set of runs.
The first group of dyno runs were with appx. 12.2 psi of boost. The best run recorded 507.93 rwhp and 604.53 rwtq.
The second group of dyno runs were with appx. 13.8 psi of boost. The best run recorded 542.5 rwhp and 687.90 rwtq.
All of these runs are SAE corrected.
As some of you might know, my previous bests were 612.77 rwhp and 774.65 rwtq. These numbers were at appx. 22 psi of unintentional boost. I say unintentional because my old method of boost control was terrible and extremely hard to control. You might be shocked at the boost level but these numbers were recorded with pump gas (94 octane) and catalytic converters. My new combination eliminates the cats. Since the 22psi runs, I have run a few leakdown tests and the numbers were less than 1%.
As part of my ongoing maintenance, I examine some of the easier plugs to get at after every few runs and all of them at the end of the boost cycle.
I have a Hallman manual boost controller coming in on Friday that I am anxious to install. I hope to start turning up the boost this weekend. This is not as simple a process as you might expect. Providing the proper amount of fuel and timing while trying to avoid detonation is quite a job.
When you are doing this kind of DynoJet testing, it really helps to have a Racepak data acquisition system. I have used a Diacom Plus for years but for whatever reason it is not linking right now. The data it records is very valuable and I miss having it.
At this point everything is looking good and running better.
Steve
I am starting the runs out very conservatively to make sure everything is good. So far I have made 25 runs. I have already detected a problem with the fuel system that has required me to replace both fuel pumps between the first set of runs and the second set of runs.
The first group of dyno runs were with appx. 12.2 psi of boost. The best run recorded 507.93 rwhp and 604.53 rwtq.
The second group of dyno runs were with appx. 13.8 psi of boost. The best run recorded 542.5 rwhp and 687.90 rwtq.
All of these runs are SAE corrected.
As some of you might know, my previous bests were 612.77 rwhp and 774.65 rwtq. These numbers were at appx. 22 psi of unintentional boost. I say unintentional because my old method of boost control was terrible and extremely hard to control. You might be shocked at the boost level but these numbers were recorded with pump gas (94 octane) and catalytic converters. My new combination eliminates the cats. Since the 22psi runs, I have run a few leakdown tests and the numbers were less than 1%.
As part of my ongoing maintenance, I examine some of the easier plugs to get at after every few runs and all of them at the end of the boost cycle.
I have a Hallman manual boost controller coming in on Friday that I am anxious to install. I hope to start turning up the boost this weekend. This is not as simple a process as you might expect. Providing the proper amount of fuel and timing while trying to avoid detonation is quite a job.
When you are doing this kind of DynoJet testing, it really helps to have a Racepak data acquisition system. I have used a Diacom Plus for years but for whatever reason it is not linking right now. The data it records is very valuable and I miss having it.
At this point everything is looking good and running better.
Steve
