GTOreturns
Well-Known Member
If I remember correctly the H.O was also flywheel dynoed without accessories too. I could be wrong on that. The early HP numbers were so fudged all over the place high and low.
Kevin
Im not sure if the 80's 5.0's were tested by todays standards. They were 225 flywheel HP.
Yes 60's & 70's were tested with no accessarys on them but on that same note alot of the big HP cars lied about there HP out put to avoid high insurance rates.
Just an example was the 67-69 L-88 in the vettes. The factory rated it at 435hp but in actuality it made 560hp. And there were "quite a few" motors that did this.