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S197 V6 Mustang Bolt-On Test

S197 V6 Mustang Bolt On Test
Just one pulley--the crank... 
   
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S197 V6 Mustang Bolt On Test
Just one pulley--the crank pulley--is underdriven on V-6 underdrive pulleykits. The one-piece pulley/harmonic damper assembly is exchanged withthe stock damper, along with a shorter serpentine drive belt. GTR sellsthe ASP Racing pulley/damper for 4.0-liter V-6s. ASP says this 25percent underdrive pulley provides charging voltage at only 850 rpm.
S197 V6 Mustang Bolt On Test
To help with damper removal,... 
   
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S197 V6 Mustang Bolt On Test
To help with damper removal, ASP provides three bolts with its damper.As harmonic damper pullers vary widely in their design and travel, thesebolts probably work OK with many pullers, but the central bolt, whichpushes against the harmonic damper bolt, was not.
S197 V6 Mustang Bolt On Test
To get our damper puller to... 
   
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S197 V6 Mustang Bolt On Test
To get our damper puller to provide the last inch of necessary travel,GTR had to make a longer bolt. This was done by starting with a modularcylinder head bolt, cutting several inches out of it, then welding ittogether again. A bushing was used to provide strength over the weldedsection.
S197 V6 Mustang Bolt On Test
Because the smaller-diameter... 
   
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S197 V6 Mustang Bolt On Test
Because the smaller-diameter crank pulley provides surprisingly reducedpulley perimeter, a new, shorter serpentine belt is required. The beltis not supplied with the pulley and must be bought separately.
S197 V6 Mustang Bolt On Test
It doesn't take long to remove... 
   
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S197 V6 Mustang Bolt On Test
It doesn't take long to remove the fan shroud and set aside the radiatorheader tank. The reward is huge space dividends when changing on theharmonic damper.
S197 V6 Mustang Bolt On Test
Admittedly a real pain in... 
   
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S197 V6 Mustang Bolt On Test
Admittedly a real pain in the neck, the only real challenge to replacinga harmonic damper is finding and rigging a damper puller that works. Thebiggest issue is having enough travel from the puller so it gets thedamper all the way off the crank. This is the puller and rig thatfinally did the deed for us.
S197 V6 Mustang Crank Pulley Bolt On Test
There's no missing the smaller... 
   
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S197 V6 Mustang Crank Pulley Bolt On Test
There's no missing the smaller ASP pulley when the stocker is laid nextto it. By changing the crank pulley, all accessories are automaticallyunderdriven. In this case it was underdriven by 25 percent.
S197 V6 Mustang Bolt On Test
Ricardo prepared the ASP damper... 
   
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S197 V6 Mustang Bolt On Test
Ricardo prepared the ASP damper for installation by lubricating thedamper bore with silicone grease, and applying a dap of silicone sealerto the keyway as shown here. The silicone combats the possibility of oilseeping along the keyway to form a leak.

RPM

Pulleys

Total Gain

POWER

TORQUE

A/F

POWER

TORQUE

2,400 n/a n/a n/a n/a n/a
2,500 n/a n/a n/a n/a n/a
2,600 n/a n/a n/a n/a n/a
2,700 n/a n/a n/a n/a n/a
2,800 118.69 230.78 13.94 10.72 20.76
2,900 123.22 231.13 13.7 7.72 14.5
3,000 127.78 231.41 13.59 7.11 12.88
3,100 132.63 232.2 13.58 7.5 13.14
3,200 136.66 231.54 13.62 6.9 11.7
3,300 140.97 231.37 13.65 7.53 12.35
3,400 145.28 231.22 13.68 7.81 12.43
3,500 150.22 232.05 13.7 8.24 12.73
3,600 154.21 231.41 13.67 8.46 12.69
3,700 158.12 230.69 13.65 8.89 12.97
3,800 162.2 230.25 13.61 9.35 13.27
3,900 166.56 230.21 13.51 10.58 14.62
4,000 170.97 230.24 13.48 11.1 14.95
4,100 174.13 228.63 13.46 10.76 14.11
4,200 177.9 227.89 13.38 11.19 14.33
4,300 181.29 226.71 13.31 11.98 14.99
4,400 184.9 225.84 13.26 12.52 15.29
4,500 187.97 224.38 13.23 13.44 16.04
4,600 191.05 222.99 13.24 13.51 15.77
4,700 193.3 220.71 13.26 12.89 14.73
4,800 194.91 217.81 13.27 13.05 14.58
4,900 198.51 217.21 13.24 15.28 16.72
5,000 199.41 213.74 13.21 14.96 16.04
5,100 201.19 211.34 13.24 15.73 16.53
5,200 202.41 208.45 13.31 15.75 16.22
5,300 202.75 204.78 13.35 16.28 16.44
5,400 203.93 202.09 13.39 17.81 17.65
5,500 204.44 198.84 13.41 18.68 18.16
5,600 204.27 195.06 13.42 19.34 18.46
5,700 203.65 191 13.45 20.18 18.92
5,800 202.44 186.54 13.46 20.68 19.06

MAC Products, Inc.
43214 Blackdeer Loop
Temecula
CA  92590

www.macperformance.com
C&L Performance
207 Green Cove Rd.
Huntsville
AL  35803
GTR High Performance
(909) 987-4386

www.gtrhipo.com
Auto Specialties Performance
Dept. 5.0
13408 Redfish Ln.
Stafford, TX 77477

www.aspracing.com

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