Pros and Cons decking/milling the head Help

basic_390 · February 6th, 2012, 05:42 PM

I was planing on decking the head on my 93 2.3 mustang .050 i know it increases CR and hp power but it there any negative like very bad idle or gas mileage also 5 angle valve job, tuner and maybe small cam .im trying to keep it cheap

ranger50toy · February 7th, 2012, 08:44 AM

Milling will change your cam timing. You will need adjustable cam gear to correct it.

Mikel89us · February 9th, 2012, 11:00 AM

or you can just take .150 off the head and have better compression! and he is right it does change your timing, ive been told 1 degree per .025" (makes the cam work that much later) so you dont really need to get one, i run my ranger with .150" off and a stock cam gear, but each tooth is 10 degrees, so i either run 6 degrees retarded or 4 degrees advanced. I change it sometimes. The other issue is spark knock, i have bad spark knock with 87, i have to use 89 or higher to make it go away.

Mikel89us · February 9th, 2012, 11:03 AM

I also run my mustang with the 4 plug head at .150 shaved, but i have an adjustable cam gear for that one. i dont have it run strait up with stock timing though. I think i have that one running about 2 degrees retarded, it changes where your power is made is all. retarded= higher rpm power and less torque, advanced = good low end torque and lower rpm hp.

February 6th, 2012, 05:42 PM	#1
basic_390 Newbie 93 4 banger Join Date: Nov 2010 Location: nc Posts: 12 iTrader: 0 reviews	Pros and Cons decking/milling the head Help I was planing on decking the head on my 93 2.3 mustang .050 i know it increases CR and hp power but it there any negative like very bad idle or gas mileage also 5 angle valve job, tuner and maybe small cam .im trying to keep it cheap

February 9th, 2012, 11:00 AM	#3
Mikel89us Regular 1991 Mustang 2.3L 11:42 @ 61 in the 1/8th Join Date: Feb 2011 Location: Logansport, IN Posts: 362 iTrader: 0 reviews	or you can just take .150 off the head and have better compression! and he is right it does change your timing, ive been told 1 degree per .025" (makes the cam work that much later) so you dont really need to get one, i run my ranger with .150" off and a stock cam gear, but each tooth is 10 degrees, so i either run 6 degrees retarded or 4 degrees advanced. I change it sometimes. The other issue is spark knock, i have bad spark knock with 87, i have to use 89 or higher to make it go away. __________________ 1991 Mustang LX 2.3L 5 Speed convert 1989 Ranger 4X4 2.3L 5 Speed Entire turbo kit waiting to be used again.

February 9th, 2012, 11:03 AM	#4
Mikel89us Regular 1991 Mustang 2.3L 11:42 @ 61 in the 1/8th Join Date: Feb 2011 Location: Logansport, IN Posts: 362 iTrader: 0 reviews	I also run my mustang with the 4 plug head at .150 shaved, but i have an adjustable cam gear for that one. i dont have it run strait up with stock timing though. I think i have that one running about 2 degrees retarded, it changes where your power is made is all. retarded= higher rpm power and less torque, advanced = good low end torque and lower rpm hp. __________________ 1991 Mustang LX 2.3L 5 Speed convert 1989 Ranger 4X4 2.3L 5 Speed Entire turbo kit waiting to be used again.

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February 7th, 2012, 08:44 AM	#2
ranger50toy Regular 1988 2.3L Hatch Ha-Ha Join Date: Dec 2010 Location: Lansing Mi Posts: 99 iTrader: 0 reviews	Milling will change your cam timing. You will need adjustable cam gear to correct it.

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