Cadillac Owners Forum banner

What's the real peak HP of the 1981 368?

1K views 12 replies 7 participants last post by  csbuckn 
#1 ·
Thought I would start a new thread. After doing some research for another thread, I have found that the rated HP for the 8-6-4 368 is 140HP. This number is at 3800RPM. That is much lower than other engine's ratings. What are your thoughts? Is that peak HP? Is it all out of breath past 3800? Or, did it make more at 4000 (4500?).

Interested to hear opinions. I don't suppose many of us have dyno numbers on one of these beasts...
 
#6 ·
I with pleasure would tell you... But here awful mess! I don't understand from where in documents such figures, the real VIN probably wasn't deciphered and chose any car. As option - Escalade.The customs sometimes too are mistaken. And then we can't deal with how to pay a tax)))On it I also wanted to learn what here the motor and what capacity from it. If it is valid 150, I will try to change documents.
 
#7 ·
If the late 70's Chevy 350's are rated at 180 hp, the 4.1 being rated at 150 almost sound optimistic. I think the Cad 425's were rated around 180 too. I think the Olds 403 was rated below 200 hp and that engine was a beast. All these engines could probably be rated 100 hp higher if it were measured at the crank, which nobody has done since 1970. I'm sure there is plenty of documentation out there that the 4.1 is a 150 hp engine at best.
 
#9 ·
cadillac_al said:
If the late 70's Chevy 350's are rated at 180 hp, the 4.1 being rated at 150 almost sound optimistic. I think the Cad 425's were rated around 180 too. I think the Olds 403 was rated below 200 hp and that engine was a beast. All these engines could probably be rated 100 hp higher if it were measured at the crank, which nobody has done since 1970. I'm sure there is plenty of documentation out there that the 4.1 is a 150 hp engine at best.
Al, I assume you meant 368 instead of 4.1.? No way a 4.1 has 150 hp.
 
#13 ·
I'd bet the 368 really is rated at 140hp because engineers probably wanted smooth power at city speeds. The cam probably falls flat anywhere above that since it's range is in the low RPMs. I'd bet it can do a mean burnout. The 1975 caddy 500 is rated at like 190hp.
 
This is an older thread, you may not receive a response, and could be reviving an old thread. Please consider creating a new thread.
Top