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Discussion Starter · #1 ·
The comparison of different pullies and the ratio of each.

STOCK JDM 2# PSI 2# METCO JL 3# JL 4# JL 5# JL 6# OTHER
OD of the Lower Pulley (IN) 7.4 7.8 7.9 8 8.17 8.5 8.75 9 8 <ANY OTHER SIZE HERE
OD of the Upper Pulley (IN) 2.93 2.93 2.93 2.93 2.93 2.93 2.93 2.93 3 <AND HERE
OD PCT OVER STOCK 0.00% 5.41% 6.76% 8.11% 10.41% 14.86% 18.24% 21.62% 5.59%
OD PCT OVER STOCK 1.000 1.054 1.068 1.081 1.104 1.149 1.182 1.216 1.056
OPTOMISTIC PSI ABSOLUTE 23.5 24.8 25.1 25.4 25.9 27.0 27.8 28.6 24.8
OPTOMISTIC PSI GAUGE 8.5 9.8 10.1 10.4 10.9 12.0 12.8 13.6 9.8
OPTIMISTIC PSI OVER STOCK 0.0 1.3 1.6 1.9 2.4 3.5 4.3 5.1 1.3
BEST GUESS PSI OVER STOCK 0.0 1.2 1.4 1.7 2.0 2.7 3.2 3.7 1.2
ADDED BLOWER DRAG hp (1) 0 8 11 13 17 24 30 36 9 (1) from Eaton M112 data
TORQUE INC OVER STOCK (FT-LB) 0 16 20 24 31 45 55 65 17
BEST GUESS HP INC OVER STOCK 0 116 146 178 231 337 418 501 120
ENGINE RPM BLOWER RPM
5000 12645 13329 13499 13670 13961 14525 14952 15379 13351
5100 12898 13595 13769 13944 14240 14815 15251 15687 13618
5200 13151 13862 14039 14217 14519 15106 15550 15994 13885
5300 13404 14128 14309 14490 14798 15396 15849 16302 14152
5400 13657 14395 14579 14764 15078 15687 16148 16609 14419
5500 13910 14661 14849 15037 15357 15977 16447 16917 14686
5600 14162 14928 15119 15311 15636 16268 16746 17225 14953
5700 14415 15195 15389 15584 15915 16558 17045 17532 15220
5800 14668 15461 15659 15858 16194 16849 17344 17840 15488
5900 14921 15728 15929 16131 16474 17139 17643 18147 15755
6000 15174 15994 16199 16404 16753 17430 17942 18455 16022
The numbers below were calculated using different methods and give slightly different results
ENGINE RPM TOTAL BLOWER LOAD (hp) (1)
5000 56 62 63 65 67 72 76 80 62
5100 58 64 65 67 69 75 78 83 64
5200 60 66 68 69 72 77 81 86 66
5300 62 68 70 72 74 80 84 89 69
5400 64 71 72 74 77 83 87 92 71
5500 67 73 75 77 79 85 90 95 73
5600 69 76 77 79 82 88 93 98 76
5700 71 78 80 82 85 91 96 101 78
5800 73 80 82 84 87 94 99 104 81
5900 75 83 85 87 90 97 102 108 83
6000 78 86 88 90 93 100 106 111 86
ENGINE RPM BLOWER BELT LOAD (lbs)
5000 192 200 202 204 207 213 218 223 195
5100 195 203 205 207 210 217 222 227 198
5200 198 206 208 210 213 220 225 230 201
5300 201 209 211 213 216 223 229 234 204
5400 203 212 214 216 220 227 232 237 207
5500 206 215 217 219 223 230 236 241 210
5600 209 218 220 222 226 233 239 245 213
5700 212 221 223 225 229 237 243 248 216
5800 215 224 226 229 233 240 246 252 219
5900 218 227 229 232 236 244 250 256 222
6000 221 230 233 235 239 247 253 259 225
 

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Discussion Starter · #2 ·
If anyone wants this I have it in an exel file but I can not load it here it will not allow that type of file to be uploaded.
 

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Good number crunching Avalanche, I would be interested in that spreadsheet if you don't mind emailing it to me. I am into that stuff.

And for other's out there, I have a spreadsheet put together on mixing premium and other gases to get higher octane ratings. Shoot me an email if you are interested in that. It is very complete with ratio's and pricing to see how much it is costing you to do it.

Charlie
[email protected]
 

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Discussion Starter · #4 ·
Here is the excel file i have
 

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I got the email, thanks Brent.

I also forgot to mention I have a spreadsheet I got a few years back for tires and gearing. It has a before and after so you can physically see what changing from stock to another size tire or gear ratio does to the truck. It was developed for 4x4's, but I tweaked the numbers to match our trucks (i.e. our transmission gear ratios and a transfer case ratio of 1:1)

It has charts with RPM/MPH in each gear so you can select the correct tire/gearing etc. Also has a little thing to determine how far off the speedo will be. SO if anyone is interested, email me.

If you guys want me to post those in the how to, not a problem. Just need help on the "how to" upload a file and I will do it today sometime.

Charlie
 
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