- Joined
- Aug 14, 2014
- Messages
- 4,446
- Reaction score
- 1,489
- Location
- Madison, WI
- My Car
- 1971 Mach 1 w/408C stroker
I am not an expert on 1/4 mile passes so seeking explanations on my times.
The picture shows 3 different time slips over 3 years. In 2021 I dyno my car just after the 1/4 mile run and it was making 366 rwhp. My ET was 13.57. In 2023 I dyno the car a day later on the same dyno for 404 rwhp. The ET was 13.64. Last week I dyno the car the day before yet in the same dyno for a whopping 471 rwhp. My ET was 13.39.
All these have been at the Hot Rod Power Tour so I keep dynoyng the car with the same vendor to track how the different mods affect performance. So the question is why is the ET not improving as rwhp is improving?. All these have been with same transmission, rear ratio and tires. Temperatures have been in between 80s and 90s for all the runs.
PS: i know i am behind on posting about improvements. I was very pleasantly surprised with the latest numbers. I will write about it in a separate post. In this post I am trying to make sense of the lack of relationship between ET and power.
The picture shows 3 different time slips over 3 years. In 2021 I dyno my car just after the 1/4 mile run and it was making 366 rwhp. My ET was 13.57. In 2023 I dyno the car a day later on the same dyno for 404 rwhp. The ET was 13.64. Last week I dyno the car the day before yet in the same dyno for a whopping 471 rwhp. My ET was 13.39.
All these have been at the Hot Rod Power Tour so I keep dynoyng the car with the same vendor to track how the different mods affect performance. So the question is why is the ET not improving as rwhp is improving?. All these have been with same transmission, rear ratio and tires. Temperatures have been in between 80s and 90s for all the runs.
PS: i know i am behind on posting about improvements. I was very pleasantly surprised with the latest numbers. I will write about it in a separate post. In this post I am trying to make sense of the lack of relationship between ET and power.