Hey folks,
New to the group, can anyone tell me what the stock compression ratio, torque and horsepower specs are on a '75 460...or maybe where I can find them? It came out of a motor home and it is going to go into a mustang I have. I know its not a truck, but I've searched the web and nobody else around has a forum or group that can hang with this one!-Joe

 

According to my books the 1975 Truck 460 had a compression ratio of 8.0 239 hp at 4200 rpm 374 foot lbs of torque at 2600 rpm.

 

According to the source book I'm looking at,it depended what 1975 model the 460 was put into.One rating was 215@4,000rpm,the second listing was for 218@ 4,000rpm,and the third listing was for 220@4,000rpm.All are listed as having an 8:1 compression ratio.This book doesn't list torque ratings,but I remember seeing it listed in another source book.I believe it was in the 357-365 lbs.-ft. range @2,400rpm.These were SAE 'net' ratings. Hope this helps.

 

Does anybody know what year Ford (and others) changed from using the old gross hp ratings to the net ratings?

Thanks

 

1973 they changed

 

it was 1972................ CJ.....