Stock 98 GT piston info

all the info for people who use search and are looking for a diff year:

[FONT=Arial, Helvetica, sans-serif]SOHC 4.6L, 5.4L,and 6.8L
1991 thru 1998 ------- 10.49cc dish
1999 thru 2000 ------- 18.10cc dish
2001 thru 2004 ------- 15.80cc dish[/FONT]
[FONT=Arial, Helvetica, sans-serif]DOHC 4.6L
1993 thru 1998 ------- 2.66cc dish
1999 thru 2002 ------- 4.54cc dish[/FONT]


....Heads....................Combustion Chamber Volume.......Intake Valve..............Exhaust valve
1991-1998 NPI......................52 cc..........................43.69mm (1.752)..........34mm (1.339)

1999-2004 PI........................44 cc.........................43.69mm (1.752)...........36mm (1.417)

....FRPP...............................51 cc..........................46.74mm (1.840)..........35.81mm (1.410)

Nice Job Chris!!

CobraRed_96_GT said:

SOHC 4.6L, 5.4L,and 6.8L


1999 thru 2000 ------- 18.10cc dish
2001 thru 2004 ------- 15.80cc dish

Click to expand...

ok i am confused about this because the heads are the same on 99-04 right???

if the pistons have a different dish then wouldn't that mean different displacement and different compression therefore heads would have to be different to get the same displacement and compression ratio???