Calculator...
- Muad'Dib
- Site Admin / Owner

- Posts: 1507
- Joined: January 8th, 2008, 10:55 am
- Stroker Displacement: 4.7L
- Vehicle Year: 1990
- Vehicle Make: Jeep
- Vehicle Model: Cherokee
- Location: Oregon
- Contact:
Re: Calculator...
Still can work on it. I just need to specs of the cams to add.
If it feels right, then STROKE it!
- Muad'Dib
- Site Admin / Owner

- Posts: 1507
- Joined: January 8th, 2008, 10:55 am
- Stroker Displacement: 4.7L
- Vehicle Year: 1990
- Vehicle Make: Jeep
- Vehicle Model: Cherokee
- Location: Oregon
- Contact:
Re: Calculator...
I did a logic check on the Calculator today since it's been forever since I did all that work.
I found an issue with how we calculate DCR at Altitude. The old calculation used a simple linear formula (subtract 0.2 DCR per 1000 ft) which worked okay at lower elevations but became increasingly inaccurate the higher you go.
The Problem:
At higher altitudes like Denver (5,280 ft) or Flagstaff (7,000 ft), the old formula was actually over-correcting - making your effective DCR appear higher than it really is.
The Fix:
Updated to use the standard atmospheric pressure formula (same one used in aviation/aerospace). This accurately calculates how air pressure drops with altitude and applies it correctly to your DCR.
Bottom line: The calculator will now give you more accurate numbers, especially if you're at altitude.
I found an issue with how we calculate DCR at Altitude. The old calculation used a simple linear formula (subtract 0.2 DCR per 1000 ft) which worked okay at lower elevations but became increasingly inaccurate the higher you go.
The Problem:
At higher altitudes like Denver (5,280 ft) or Flagstaff (7,000 ft), the old formula was actually over-correcting - making your effective DCR appear higher than it really is.
The Fix:
Updated to use the standard atmospheric pressure formula (same one used in aviation/aerospace). This accurately calculates how air pressure drops with altitude and applies it correctly to your DCR.
Bottom line: The calculator will now give you more accurate numbers, especially if you're at altitude.
If it feels right, then STROKE it!
-
cal
- Making Progress

- Posts: 62
- Joined: March 19th, 2008, 12:09 pm
- Stroker Displacement: 4.71
Re: Calculator...
oooh exciting!
Considered adding the newcomber roller cams?
https://www.newcomerracing.com/store/p4 ... p_AMC.html
Considered adding the newcomber roller cams?
https://www.newcomerracing.com/store/p4 ... p_AMC.html
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