View Single Post
  #75  
Old 12-10-2017, 11:20 AM
Tom Vaught's Avatar
Tom Vaught Tom Vaught is offline
Boost Engineer
 
Join Date: Dec 2001
Location: The United States of America
Posts: 31,294
Default

Going to try today to post some Holley Jet Flow Numbers in Cubic Centimeters per Minute.
Will see if it works.
This is a Test.

Jet #___Orifice Dia. =________Area________Flow (cc/min)
40_______0.040__________0.001257__________117
41_______0.041__________0.00132__________122.5
42_______0.042__________0.001385__________129
43_______0.043__________0.001452__________135.5
44_______0.044__________0.001521__________142
45_______0.045__________0.00159___________149
47_______0.047__________0.001735__________163
48_______0.048__________0.00181__________170.5
49_______0.048__________0.00181___________178
50_______0.049__________0.001886__________186
51_______0.050__________0.001963__________195
52_______0.052__________0.002124__________203
53_______0.052__________0.002124__________212
54_______0.053__________0.002206__________221
55_______0.054__________0.00229___________231
56_______0.055__________0.002376__________241
57_______0.056__________0.002463__________251
58_______0.057__________0.002552__________262
59_______0.058__________0.002642__________273
60_______0.060__________0.002827__________285
61_______0.060__________0.002827__________298
62_______0.061__________0.002922__________311
63_______0.062__________0.003019__________325
64_______0.064__________0.003217__________341
65_______0.065__________0.003318__________357
66_______0.066__________0.003421__________374
67_______0.068__________0.003632__________392
68_______0.069__________0.003739__________411
69_______0.070__________0.003848__________429
70_______0.073__________0.004185__________448
71_______0.076__________0.004536__________470
72_______0.079__________0.004902__________492
73_______0.079__________0.004902__________517
74_______0.081__________0.005153__________542
75_______0.082__________0.005281__________566
76_______0.084__________0.005542__________587
77_______0.086__________0.005809__________615
78_______0.089__________0.006221__________645
79_______0.091__________0.006504__________677
80_______0.093__________0.006793__________703
81_______0.093__________0.006793__________731
82_______0.093__________0.006793__________765
83_______0.094__________0.00694___________795
84_______0.099__________0.007698__________824
85_______0.101__________0.007854__________858
86_______0.101__________0.008012__________890
87_______0.103__________0.008332__________923
88_______0.104__________0.008495__________952
89_______0.104__________0.008495__________987
90_______0.104__________0.008495__________1014
91_______0.105__________0.008659__________1080
92_______0.105__________0.008659__________1150
93_______0.105__________0.008659__________1205
94_______0.108__________0.009161__________1260
95_______0.118__________0.010936__________1320
96_______0.118__________0.010936__________1375
97_______0.125__________0.012272__________1440
98_______0.125__________0.012272__________1500
99_______0.125__________0.012272__________1570
100______0.128__________0.012868__________1640

Well it looks like it worked.

Now that I know it posts the info and it is easy to read I will make a few comments.
Holley jets are manufactured in production volumes and then each jet is run thru a machine and sorted for size.
This gets you a pretty close flow number for your Jetting of the Holley carburetor. Notice I said "Close".

Now there are other jets out there like the Comp Cams Maxi-Jet. These jets tend to run on the HIGH SIDE of the Jet Flow Numbers
so if you are running in a class where the Holley Specs say the carb came with a 72 Primary Jet and a 78 Secondary Jet the Maxi-Jet
will get you a bit more fuel to the engine vs the normal guy running the stock Holley Jets. Might be more money but also might give
you a slight edge on the guy in the other lane.

Today is just passing on a little info that might make a difference in racing. Not for Bracket Guys.

Tom V.

__________________
"Engineers do stuff for reasons" Tom Vaught

Despite small distractions, there are those who will go Forward, Learning, Sharing Knowledge, Doing what they can to help others move forward.

Last edited by Tom Vaught; 12-10-2017 at 11:46 AM.