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December 19th, 2011, 08:57 PM
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#1 |
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Newbie
Join Date: Nov 2011
Posts: 14
 iTrader: 0 reviews
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Intake Valve Modification
Im about to do a pi swap and want to run a stage 2 cam or equivilant. I currently have my heads at the machine shop and was wanting to know how the intake valve are modified for more ptv clearance. Will this be enough clearance or do I need to notch my pistons also. I want to get full potential out of what ever cam I choose.
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December 19th, 2011, 10:41 PM
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#2 |
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Hardcore Enthusiast
1998 Mustang GT
Join Date: Aug 2010
Posts: 1,282
iTrader: 2 reviews
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you need to have them degree your cams to allow for more ptv room
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pi swapped and dropped sn95 |
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December 20th, 2011, 09:00 AM
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#3 |
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MM's king of Neon's
404 - car not found
17.81@87
Join Date: Aug 2010
Location: Diesel Engine Capital of the World, Columbus, IN
Posts: 7,373
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The way they typically provide clearance is by retarding your cam several degrees. However this means you don't get the full potential of your new cam you just shelled out for.
To get all the performance you can out of those new bumpsticks of yours, you'd have to get your pistons notched to accommodate the increased lift/duration.
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Official Secondhand Snake Build Thread Here Looks Like a Cobra, Sounds Like a Cobra, Tastes Like a Cobra, Not a Cobra. For Sale: P71 Interceptor motor  |
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December 20th, 2011, 07:50 PM
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#4 |
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Newbie
Join Date: Nov 2011
Posts: 14
iTrader: 0 reviews
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I just got an email from Nick at mhs, he says that since my heads were disassembled and at the machine shop I could have them take .030" off the face of my intake valves and I will have clearance.
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December 22nd, 2011, 12:11 AM
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#5 |
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Regular
1998 Mustang GT
Join Date: Jul 2010
Location: Broken Arrow, OK
Posts: 105
iTrader: 0 reviews
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He would be the one to listen to. The man knows his 4.6s.
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Mods: Full Griggs suspension, Koni coilovers, Cobra brakes with SS lines, sub frame connectors, 3.73s, 5-speed swap, TR6's
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December 22nd, 2011, 06:31 PM
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#6 | |
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Newbie
Join Date: Nov 2011
Posts: 14
iTrader: 0 reviews
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December 22nd, 2011, 07:29 PM
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#7 |
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Hardcore Enthusiast
1998 Mustang GT
Join Date: Aug 2010
Posts: 1,282
iTrader: 2 reviews
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thats some good knowledge to know
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pi swapped and dropped sn95 |
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