289 vs. Hi Po 289
I ♥ Acer
Joined: Oct 2004
Posts: 17,565
From:
RE: 289 vs. Hi Po 289
ORIGINAL: my77stang
no prob man i just saw an oportunity to correct ya and poke a little fun all at once so i had to take it[8D]
no prob man i just saw an oportunity to correct ya and poke a little fun all at once so i had to take it[8D]
3rd Gear Member
Joined: Feb 2007
Posts: 551
RE: 289 vs. Hi Po 289
K motors differed from standard motors with the following:
1. High nodular content crank
2. Thicker webbing in block
3. Larger main bearing caps
4. Larger connecting rods
5. Forged pistons
6. Solid lifter cam
7. Dual-point mechanical-only advance (hence the 12 degress initial advance)
8. Screw-in rocker studs
9. Cast-in valve spring seats
10. 54 cc(?) combustion chambers
11. Better exhaust manifolds
Some people want to believe the heads had different porting but they didn't.
I may have left something out. I'm getting old.
1. High nodular content crank
2. Thicker webbing in block
3. Larger main bearing caps
4. Larger connecting rods
5. Forged pistons
6. Solid lifter cam
7. Dual-point mechanical-only advance (hence the 12 degress initial advance)
8. Screw-in rocker studs
9. Cast-in valve spring seats
10. 54 cc(?) combustion chambers
11. Better exhaust manifolds
Some people want to believe the heads had different porting but they didn't.
I may have left something out. I'm getting old.
5th Gear Member
Joined: Nov 2006
Posts: 2,287
From: North Fulton, GA
RE: 289 vs. Hi Po 289
ORIGINAL: Soaring
Actually, there are three 289 Mustang engines. The C code is a 2 barrel carb version and was listed at 200 Horsepower at the flywheel. The 4 barrel A code 10:3.1 compression version was listed at 225 HP. The Hipo is listed at 271 HP. This should answer your question of what is so special about the K code hipo engine.
http://www.hipomustang.com/images/hipoeng/
Actually, there are three 289 Mustang engines. The C code is a 2 barrel carb version and was listed at 200 Horsepower at the flywheel. The 4 barrel A code 10:3.1 compression version was listed at 225 HP. The Hipo is listed at 271 HP. This should answer your question of what is so special about the K code hipo engine.
http://www.hipomustang.com/images/hipoeng/
I keep forgetting that the '64-1/2 had a different code for the 4-barrel.FWIW, my factory service manual lists the 4-barrel at 10.0:1 and the 2-barrel as 9.3:1. I didn't realize the compression ratio was different. Learn something new every day ... but forget twice as much as I learn. [sm=alcoholic.gif]
4th Gear Member
Joined: May 2006
Posts: 1,576
From:
RE: 289 vs. Hi Po 289
Well, I wasn't born yet in '65 so I wouldn't know what Ford said. What I do know is that I own a '65 K code and the K code book written by Tony Gregory even says they didn't have forged pistons.
6th Gear Member
Joined: Jan 2007
Posts: 5,469
From: AR
RE: 289 vs. Hi Po 289
ORIGINAL: Soaring
That seems to be happening a lot lately. What am I, the fall guy?
ORIGINAL: my77stang
no prob man i just saw an oportunity to correct ya and poke a little fun all at once so i had to take it[8D]
no prob man i just saw an oportunity to correct ya and poke a little fun all at once so i had to take it[8D]