Hp had a range, 230 was top end stock
No, they actually did do that in the early 70s/late 60s.
The sae gross method of overestimated power doesn't count in my opinion but to each his own. Logic would tell me that the same engine design with better flowing heads and higher compression will make more power... but magic made the late 60s/early 70s motors make more power than any of the variants before the 90s? Everyone thinks it's the smog era lower compression that killed power, which is a big part of it. The other huge part is OEMs started publishing real numbers with the accessories installed.Hp had a range, 230 was top end stock
No, they actually did do that in the early 70s/late 60s.
It was actually measured gross HP - measured at the flywheel on a stand. No air cleaner, no accessories (no alternator, etc), no exhaust system. It was measured.
That's why I stated a big reason for the drop in power was the OEMs started testing with accessories installed and the net number isn't as impressive. Yes the gross is a real number...if only you could run it in a vehicle like that? That's why I called it an overestimated number because it's not realistic that it will ever be run that way. I guarantee if you put the magnum motor on the dyno without accessories it would be closer to 300hp, but it's meaningless.It was actually measured gross HP - measured at the flywheel on a stand. No air cleaner, no accessories (no alternator, etc), no exhaust system. It was measured.
In fact, we've got a number of posts in the AMC forums about it and how accurate the hp rating from the company was when an engine was on the dyno with NO accessories and so on - bare engine. A couple of dyno guys (one also does flow bench work) showed it on the dyno.
That's why there's a "Gross" and a "net" hp rating.
But don't take my word for it..............
From C&D magazine -
I stated in my post there were newer better engines to choose from. The numbers I put up were from 1959-1971
And as I stated after those are gross numbers which overestimate the reality with accessories, air cleaners, and exhaust installed by 30-50hp. It was a 170-200hp engine in the car period. The OEMs switched to net numbers in 72 and have stayed there since. A 5.2L magnum motor actually makes 230hp net which would be more like 280hp gross. That's an awful large v8 to run to get Honda civic power numbers though.
My 360 does 387 HP. Still well under a modern V8.
And well above it's stock output. Even sports cars before the 2000s were pretty terrible. The fox body mustang which is likely the basis of more drag cars than anything in the planet with it's stock 5.0L v8 was slower 0-60 than a modern JL with a 4cyl. We've come a long way.
The 318 from 1957-1966 was an entirely different engine. The Poly 318 was an A engine not an LA. Just keep that in mind.
1987 Mustang 5.0 0-60 in 6.3 seconds.
https://fastestlaps.com/models/jeep-wrangler-unlimited-2-0
What is the source for fastestlaps.com?
