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Old 11-27-2009, 05:17 PM   #1
phish
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Default How much HP does your 289 have?

just curious as to how much you guys are getting out of a 289. i realize some of you diehards/mechanics are prolly getting a lot and some others are just keeping it more stock. just trying to get some type of average for that engine. and if you have a stroker 289 just mention it.
i have a 289 A code. after it comes back from the shop next week the guy said i should have somewhere in the neighborhood of 300hp.

i have added :
tri Y headers
flowmaster 40 exhaust
voodoo cam
new carb---not exactly sure what it is
new air intake manifold
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Old 11-27-2009, 07:00 PM   #2
Joe1967
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thats not a 300 hp combo

hardly 200 without serious work, or new heads

289's biggest bottle neck is the exhaust ports in the cast heads.
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Old 11-27-2009, 07:35 PM   #3
GibMax
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Default Just give your wife the phone number of your engine builder.

I just gave my wife the phone number of my engine builder. He's looking at a 289 or a 302 for my 66. I'm hoping my wife will call him with a credit card number for xmas.

The engine builder said something about just getting a different cam shaft (difference between a 302 and 289 maybe?).
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Old 11-27-2009, 09:22 PM   #4
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302 and 289 cams are virtually the same.... just different ends of the spectrum (if that makes sense) eg, the wild 289 cam is a mild 302 cam.
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Old 11-29-2009, 12:02 AM   #5
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200 hp after all that work??? they came with 225 stock......i dont see how that is possible. i have never dynoed the car. i have raced many cars and have beat 350z , 98 style mustangs, and other sports cars that have more than 250 hp.....
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Old 11-29-2009, 08:26 AM   #6
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I suspect that different measures of "horsepower" are being spoken here. SAE gross (225, crank), probably SAE net (190-ish), possibly a measurement at the wheels. Comparing just the numbers doesn't help until everybody is speaking the same language.

That said, I'd guess you might be up around where the K-code engine was, assuming a good rebuild and a little fine tuning of the carb and ignition. Call it 275 SAE gross/235 SAE net.

Somebody with better knowledge of what Shelby did to get a claimed 306 might be able to justify another number for you if that sort of work was also done to your engine.

Don't forget that a '65 Mustang is a relative lightweight compared to almost anything recently sold with either a V8 or 250+ horsepower. And while the 289's torque was clearly on the weak side back in the mid-60's (compared to, say, the 327 SBC), it's still going to be higher than what anybody's normally aspirated 2.7- to 3-liter V6 puts out.


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Old 11-29-2009, 02:09 PM   #7
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ford's claimed 225 hp stock was more like 190, if that.
HP is a subject often exaggerated, sorta like the concept of why women are so bad with measurements, they've been told 5 inches in 9 inches for years.
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Old 11-29-2009, 02:27 PM   #8
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Quote:
Originally Posted by Joe1967 View Post
sorta like the concept of why women are so bad with measurements, they've been told 5 inches in 9 inches for years.
lolwut?
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Old 11-29-2009, 05:06 PM   #9
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http://www.youtube.com/watch?v=OeNotjdQ2HM

Rebuilt: 289, suspension (grab-a-trac), c-5 tranny
Upgrades: Weiand Action + Intake maifold, Holley Street Avenger 570cfm, Hooker Comp Headers, Flamethrower Coil and Distributor

at the wheels its 185hp and 240 ft lb tq
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Old 11-29-2009, 05:10 PM   #10
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is the short block/cam stock?
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Old 11-29-2009, 05:10 PM
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