Classic Mustang General DiscussionMake your non-Technical threads/posts in here.
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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
new carb---not exactly sure what it is
new air intake manifold
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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.....
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.
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.
-1994 Cobra: H/C/I, up's, smog del, fluidine cooling, carbon fiber clutch, short throw shifter, 3.55's, racing pan, 04 cobra interior, UPR front end, tubular k and a arms, coilovers, strut tower brace, full length subframe connectors, MAC control arms in the back, fr500's, drag radials, chipped and tuned by Horsepower Ranch. 327rwhp
-1966 Mustang: stripped.....ill get to it when i get some $$$
-2001 chevy pos
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