AEROHEAD RACING

317.862.0223
aeroheadracing.com

One of the bargains we tested was the Aerohead small-block Chevy head, featuring a larger com-bustion chamber than most tested. It should be noted that this netted a lower compression ratio. These reconditioned Dart Iron Eagle S/S heads pro-duced a healthy torque number of 475 lb-ft at 3,900 rpm and 430 horses at 5,700 rpm. With these heads you can gain power and save money.

CATEGORY 1
MODEL: Aerohead Cast Iron, 165cc
PN: ARO-CH-1D-SS
PRICE: $625/pair
Weight: 52 pounds each
True measured combustion chamber volume: 73 cc
True measured intake and exhaust port volume: 178 cc; 70 cc
Spring pressure: 90 lbs. on seat; 270 lbs. at 0.500-inch lift
installed height: 1.850 inch
Valve size: 1.94/1.50-inch
Intake flow at 0.400 lift: 219 cfm
Complete, no guideplates
Airflow
Valve lift.050.100.200.300.400.500.600
Intake Corr test flow29.560116162219225226
Exhaust Corr test flow22.548101141171185188
POWER
Average torque:440 lb-ft
Average horsepower: 389 hp
RPMlb-ftHP
3,200446272
3,300448281
3,400454294
3,500460307
3,600464318
3,700470331
3,800475343
3,900476353
4,000475362
4,100473369
4,200472377
4,300471385
4,400469393
4,500467400
4,600461404
4,700457409
4,800451412
4,900445415
5,000442420
5,100438425
5,200432427
5,300426429
5,400420432
5,500410429
5,600404431
5,700396430
5,800388428
5,900379426
6,000372425
6,100359416