TW170 vs. AFR 205 - Ford Mustang Forums : Corral.net Mustang Forum
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post #1 of 5 Old 03-18-2017, 10:40 PM Thread Starter
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TW170 vs. AFR 205

All things being equal in setup what power gains would be expected by switching from TW170 heads to AFR 205's ? The TW170's are 1262 gasket matched and tapered upwards while the AFR's are the #1450 CNC ported from manufaturer. Current setup is in sig.


'91 Hatch - 358W 10.5:1 -TW170's - Lunati Solid Flat cam (61041) 241/[email protected] .554/.576- Weiand Stealth intake- Holley 750DP- C4 w/4000 stall -8.8 rear with 4.30 full spool w/31spline eliminators - M/T 275/60/15 Drag Radials. [email protected] 1.58 60' so far.
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post #2 of 5 Old 03-19-2017, 08:22 PM Thread Starter
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I will be changing intake to a Victor Jr. that should make power from 3500-7500 rpm's

Current Cam:
Advertised Duration (Int/Exh): 276/282
Duration @ .050 (Int/Exh): 241/249
Gross Valve Lift (Int/Exh): .554/.576
LSA/ICL: 110/106
Valve Lash (Int/Exh): .016/.016
RPM Range: 2600-6800

New Cam:
Advertised Duration (Int/Exh): 290/298
Duration @ .050 (Int/Exh): 257/265
Gross Valve Lift (Int/Exh): .600/.624
LSA/ICL: 110/106
Valve Lash (Int/Exh): .016/.016
RPM Range: 3000-7200


'91 Hatch - 358W 10.5:1 -TW170's - Lunati Solid Flat cam (61041) 241/[email protected] .554/.576- Weiand Stealth intake- Holley 750DP- C4 w/4000 stall -8.8 rear with 4.30 full spool w/31spline eliminators - M/T 275/60/15 Drag Radials. [email protected] 1.58 60' so far.
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post #3 of 5 Old 04-15-2017, 10:29 PM
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I have almost equal to what you have on cam [email protected] and .568 lift with the Air Gap dual plane Edelbrock manifold and mine made 525hp max at 5800 I have the AFR heads I was a little disappointed cause I thought 600hp was within reach,was told to get a cam with 259 or higher @ .050 and I should be there. Anyway I don't race it only street driven so it's fine and very easy to drive
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post #4 of 5 Old 05-02-2017, 08:48 PM
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With the proper cam and induction on a 408 the 170tw heads will go very low 10's at 3150 lb

I had that combo 10 years ago. Flowtech Induction was responsible for the design of that engine

Tim

86 mustang
454 FTI LS3 Mast intake FTI hyd roller Holley EFI 275 MT Pump gas e85. 9.24 143.58 1.33 3.73 5.84 116.21
HR Drag Week 2013 SS-BB-NA Winner
www.flowtechinduction.com
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post #5 of 5 Old 05-03-2017, 01:30 PM
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I just did several upgrades to my car, and one of them was going from a 70cc Edelbrock Victor ported head to a 65cc AFR 220cc Eliminator competition cnc'd head. Should be done with everything this week to get some results.
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