CFM & Boost Chart

Application

  • Engine Size: 13B (80 CID)
  • Blower Size: 5" (80)
  • Efficiency: 0.85
Blower Pulley
Drive Ratio
Boost
Blower RPM @ Engine RPM
Air Flow (SCFM) @ Engine RPM
Dash
Diameter
 
 
2K RPM
4K RPM
6K RPM
8K RPM
2K RPM
4K RPM
6K RPM
8K RPM
-1
4.75"
0.89
-3.5 PSI
1789
3579
5368
7158
70
141
211
282
-2
4.50"
0.94
-2.9 PSI
1889
3778
5667
7556
74
149
223
297
-3
4.25"
1.00
-2.2 PSI
2000
4000
6000
8000
79
157
236
315
-4
4.00"
1.06
-1.4 PSI
2125
4250
6375
8500
84
167
251
334
-5
3.75"
1.13
-0.5 PSI
2267
4533
6800
9067
89
178
268
357
-6
3.50"
1.21
0.5 PSI
2429
4857
7286
9714
96
191
287
382
-7
3.25"
1.31
1.6 PSI
2615
5231
7846
10462
103
206
309
412
-8
3.00"
1.42
3.0 PSI
2833
5667
8500
11333
111
223
334
446
-9
2.75"
1.55
4.6 PSI
3091
6182
9273
12364
122
243
365
487
-10
2.50"
1.70
6.5 PSI
3400
6800
10200
13600
134
268
401
535


Application

  • Engine Size: 13B (80 CID)
  • Blower Size: 7" (112)
  • Efficiency: 0.85
Blower Pulley
Drive Ratio
Boost
Blower RPM @ Engine RPM
Air Flow (SCFM) @ Engine RPM
Dash
Diameter
 
 
2K RPM
4K RPM
6K RPM
8K RPM
2K RPM
4K RPM
6K RPM
8K RPM
-1
4.75"
0.89
1 PSI
1789
3579
5368
7158
99
197
296
394
-2
4.50"
0.94
1.8 PSI
1889
3778
5667
7556
104
208
312
416
-3
4.25"
1.00
2.8 PSI
2000
4000
6000
8000
110
220
331
441
-4
4.00"
1.06
3.9 PSI
2125
4250
6375
8500
117
234
351
468
-5
3.75"
1.13
5.1 PSI
2267
4533
6800
9067
125
250
375
500
-6
3.50"
1.21
6.5 PSI
2429
4857
7286
9714
134
268
401
535
-7
3.25"
1.31
8.2 PSI
2615
5231
7846
10462
144
288
432
576
-8
3.00"
1.42
10.1 PSI
2833
5667
8500
11333
156
312
468
624
-9
2.75"
1.55
12.3 PSI
3091
6182
9273
12364
170
341
511
681
-10
2.50"
1.70
15 PSI
3400
6800
10200
13600
187
375
562
749


Application

  • Engine Size: 20B (120 CID)
  • Blower Size: 9" (144)
  • Efficiency: 0.85
Blower Pulley
Drive Ratio
Boost
Blower RPM @ Engine RPM
Air Flow (SCFM) @ Engine RPM
Dash
Diameter
 
 
2K RPM
4K RPM
6K RPM
8K RPM
2K RPM
4K RPM
6K RPM
8K RPM
-1
4.75"
0.89
-1.3 PSI
1789
3579
5368
7158
127
254
380
507
-2
4.50"
0.94
-0.5 PSI
1889
3778
5667
7556
134
268
401
535
-3
4.25"
1.00
0.3 PSI
2000
4000
6000
8000
142
283
425
567
-4
4.00"
1.06
1.2 PSI
2125
4250
6375
8500
151
301
452
602
-5
3.75"
1.13
2.3 PSI
2267
4533
6800
9067
161
321
482
642
-6
3.50"
1.21
3.5 PSI
2429
4857
7286
9714
172
344
516
688
-7
3.25"
1.31
4.9 PSI
2615
5231
7846
10462
185
371
556
741
-8
3.00"
1.42
6.5 PSI
2833
5667
8500
11333
201
401
602
803
-9
2.75"
1.55
8.5 PSI
3091
6182
9273
12364
219
438
657
876
-10
2.50"
1.70
10.5 PSI
3400
6800
10200
13600
241
482
723
963