Factory Horsepower Ratings
Can someone tell me what my 1970 Cad coupe 472 is rated at
(horsepower/torque)? I was looking at the cad500parts.com website.
The online Catalog showed ratings ALOT lower than what I have ever
read before. Also, what is my correct rear gear ratio for 1970?
Thanks. I really enjoy this group.
- 375hp @ 4400 rpm
525 ft. lb. @ 3000 rpm
Standard rear axle came with a 2.93, 3.15 axle ratio on Seventy-Five
models. Also available was a controlled differential, aka posi-
To know what rear the car really has, you should look at the tab on
the differential. It's normally attached to one of the bolts near
the driveshaft. I can't recall what the codes mean at the moment,
but I'll look it up if you need them.
ps.. I also have a 70 Coupe DeVille. You can see pics of it in the
photo section. 70 caddy's have to be the best looking of all
caddy's, ever. just my biased opinion. lol
- 70cadcoupe@c...> wrote:
> Can someone tell me what my 1970 Cad coupe 472 is rated atThe difference is due to the way horsepower ratings were changed in
the '70's. 375 bhp was a gross measurement. Later measurements were
net hp. Add 1 other factor: Caddilac made 3 different pistons for the
472's, which altered the compression ratio. 10:1 on 1970, 8.5:1 after
that, and 8.25:1 in '74. That's what changes the horsepower. I have
had the same confusion, but thanks to the guys on this board, I have
learned a lot. If you want to know if you have the best motor to use,
I think you do. If you want bragging rights, go ahead and say 375 hp.
Just realize that that's not whats being produced at the back wheels.
The torqu rating is even more impressive for that motor, btw.