HI-Po means what?

[RedPonyGT]

High performance maybe. I have seen this many times and never quite knew what it mean when asociated with a mustang.
Anyone know what it means?

 

[golf4283]

the Hipo engine means "high performance". It was used on the 289's in the 60's to denote the high performance package. Just sort of a short term like saying "GT" instead of grand touring or whatever.

 

[Route666]

High Power I believe.

HO is High Output, if stangs come with that, I know our old Falcon GTs did, not sure about the stangs.

 

[latamud]

I think "high performance" had Hipo heads, 4v carb, and intake with hiPo exhaust manifolds and a 14in air cleaner maybe disc brakes up front too.

 

[D.Hearne]

Hi-po was short for High Performance. The Hi-po has a different block with heavier 2 bolt main caps, better rods, a slightly better crank ( really just aslightly better casting than the std ones) heads were only slightly different, they had cast in spring pockets, screw in studs w/guide plates, same ports and valves as the std heads. The exhaust manifolds were better flowing, the intake was the same as the std one, the carb was a 600 cfm instead of a 480 cfm Autolite. The cam was also different, it was a solid lifter design with improved lift and duration over the std cam. I think that was about it, I don't think I missed anything, if I did , I'm sure someone will add to it.

 

[66stangmeister]

I'd say you covered most if not all the bases D.Hearne

 

[66HertzClone]

You forgot to mention the dual point mechanical advance dizzy.

 

[reenmachine]

...and the fatty harmonic damper

 

[Kman]

A few other small things unique to this car were a larger diameter "underdrive" pulley on the alternator and a steel hub/4 blade aluminum fan. The early HiPo's (65/66) were the only Mustangs of this vintage that used a factory installed 9" rear.