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TOPIC: Which pulleys to go with for 03 Cobra
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1BadSnake (User)
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Which pulleys to go with for 03 Cobra 2 Days, 9 Hours ago  
I currently have a 3" blower pulley, a 9lb lower pulley, a steeda tensioning pulley, and the rest are stock. I have a question as to whether to replace the existing pullies with 90mm or 100mm. Or should I upgrade to a cog pulley system? If not, which brand, moto blue, steeda, bbk? Please help!
 
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DTPracing (Admin)
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Re:Which pulleys to go with for 03 Cobra 1 Day, 11 Hours ago  
How much boost are you seeing right now and do you have any belt slip? there is a point of negative returns with the stock blower. In other words, more boost = more heat and less HP. Around 15 lbs is the most you want to do unless the blower is ported
 
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#4584
1BadSnake (User)
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Re:Which pulleys to go with for 03 Cobra 1 Day, 11 Hours ago  
The last time I had it up a DTP the boost fell from 15 to 11lbs. I had just finished putting a 1 3/4" x 3" Kooks long tube/ 3" catted midpipe/ 3" MAC rear exit muffler system. It can handle more now with the new exhaust. Beside the blower pulley change which would be more advantagous replacing the ford stock pulleys with 90 mm or 100mm ud pulleys? Any help you could provide would be great because I want to buy them and get them put on and retune. Confused about the different brands single or double bearing, and the manufacturers. I was thinking MOTO BLUE, but I am a true novice. Thanks also no belt slip with the 3" pulley on the Eaton, I have a 2.8 that you took off that was slipping , wonder if it was the belt length though.
 
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