Quote:
Originally Posted by FastDriver  I'd love to see a comparison with TFS CNC'd 205cc heads vs. AFR205cc heads on the same day, same dyno, same operator if any of you have seen one.
Chris |
Well no dyno information, which would be much better but here is a little comparison:
BOLD shows the advantage to each compared to the other.
AFR CNC 205------------------------------------------------------ Trickflow CNC 205
Airflow Chart for Track AFR 205 Heads:
Lift Value (in.) - Intake Flow - Exhaust Flow
Inches - CFM - CFM
0.200 - 141 -
125
0.300 - 201 -
180
0.400 - 251 -
211
0.500 - 291 -
225
0.550 - 301 - 228 (TW info not given)
0.600 - 306 - 231 (Exhaust Tie)
0.700 -
310 -
235
Airflow Chart for CNC Ported 205cc Track Heat Heads:
Part Number: TFS-51400010-C02
Inches - CFM - CFM
0.100 - 071 - 056
0.200 -
144 - 112
0.300 -
220 - 150
0.400 -
270 - 192
0.500 -
299 - 220
0.600 -
316 - 231
AFR 205:
205cc Head, 58cc, 2.08”/1.60” Valves,
1.550” Roller Dual Valve Spring w/ dampner
(.670”), 10* locks, 7/16” rocker studs, no smog provisions.
$1,850.
210# of spring pressure and 70cc exhaust port.
Valve Angles: 23* for Intake and Exhaust.
Trickflow 205:
205cc Head, 65cc, 2.02"/1.60" Valves, 1.460", Dual Valve Springs w/ dampner (.600”), 10* locks, 7/16” rocker studs, no smog provisions, and not machined for o-rings. $1,990.
66cc exhaust port.
Valve Angles:
Intake is 15* and Exhaust is 17*.
Looks like a nice even match to me...the Trickflow has the intake side 'won' and the AFR has the exhaust side 'won' (maybe a bit better for expending the compression for boosted application) and save $140.