MustangWorks.com : Ford Forums - View Single Post - word jr. and sr. iron heads good enough for 12s out of the box?

92Rustang · 12-17-2001, 10:03 PM

I installed my Jr's this summer. I agree with 91GTturbo unless you are going to build the hell out of motor I would stick with the Jr's. I did a lot off research on thess heads before my purchase and that is what I found. Make sure you get the stronger springs. I jsut broke one at 1300 miles, called world I they told me for a roller cam I should not be using the 1.250 spring. Go with the 1.44 double spring.

12-17-2001, 10:03 PM	#12
92Rustang Registered Member Join Date: Feb 1999 Location: Smithton, IL, US Posts: 215	I installed my Jr's this summer. I agree with 91GTturbo unless you are going to build the hell out of motor I would stick with the Jr's. I did a lot off research on thess heads before my purchase and that is what I found. Make sure you get the stronger springs. I jsut broke one at 1300 miles, called world I they told me for a roller cam I should not be using the 1.250 spring. Go with the 1.44 double spring. __________________ 92 GT 5-speed Windsor Jr,E303,1.7RR,Cobra intake,65mm TB,155lph,24 lbs,75mm MAS,shorties,h-pipe, 2.5 flowmaster,Black magic,Holley adj fuel, 3.73 No times yet. 13.6 before heads,cam,inj,rr www.fordmustanggt.com