MustangWorks.com : Ford Forums - View Single Post

DRASTiK · 09-19-2002, 12:58 AM

I am considering buying a 69 with an original 390 in it and I was looking in my Chilton's book for that year, and it says that the 390 with an automatic transmission was rated at 270hp@ 4400rpm, and 390ftlbs@2600rpm. The 390 with the manual tranny was rated at 320hp@4800rpm and 427ftlbs@3200rpm.

Both motors are 10.5-1 with all the same specs. Why the difference of 50hp? What was different other than the trannys? Was there something done differently to the engines with manual trannys?

09-19-2002, 12:58 AM	#1
DRASTiK Registered Member Join Date: May 2001 Location: Yuma, AZ Posts: 536	1969 390s ?? I am considering buying a 69 with an original 390 in it and I was looking in my Chilton's book for that year, and it says that the 390 with an automatic transmission was rated at 270hp@ 4400rpm, and 390ftlbs@2600rpm. The 390 with the manual tranny was rated at 320hp@4800rpm and 427ftlbs@3200rpm. Both motors are 10.5-1 with all the same specs. Why the difference of 50hp? What was different other than the trannys? Was there something done differently to the engines with manual trannys? __________________ Dave 88 GT - 13.4@106 on street tires (2.2 60ft) My Stang RHC member #75 My stang is FOR SALE!!