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How much HP does your 289 have?

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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
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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
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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, 07:39 PM   #11
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Ten Thousand and Six....
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Old 11-29-2009, 07:53 PM   #12
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Quote:
Originally Posted by longlive289s View Post
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
is that with stock heads or have u done anything to them? (porting, gasket matching ect)
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Old 12-01-2009, 07:00 PM   #13
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My '66 289 put down 230 rwhp/250 tq corrected (about 290 hp/312 tq) at the flywheel if you assume a 20% drivetrain loss) thru a World Class T-5 transmission with the following setup:

289 Block bored .040" over
Edlebrock Performer 60 cc heads 1.90"/1.60" valves
Edlebrock Performer intake
204°/214° Duration, .448"/.472" Lift cam
Holley Street Avenger 575 cfm carb
Holley Fuel pump/regulator
Crane 1.6 roller rockers
Accel electronic ignition
MAC long tube headers
Summit balancer

A good Tune!!

Here's the Dyno Sheet on it:


Click the image to open in full size.
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Old 12-01-2009, 10:15 PM   #14
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My 289+178 makes around 700... I dont have any 289s. Just wanted to brag about the **** nasty Pontiac I have..
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Old 12-02-2009, 06:43 AM   #15
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Quote:
Originally Posted by JDraper View Post
My '66 289 put down 230 rwhp/250 tq corrected (about 290 hp/312 tq) at the flywheel if you assume a 20% drivetrain loss) thru a World Class T-5 transmission with the following setup:

289 Block bored .040" over
Edlebrock Performer 60 cc heads 1.90"/1.60" valves
Edlebrock Performer intake
204°/214° Duration, .448"/.472" Lift cam
Holley Street Avenger 575 cfm carb
Holley Fuel pump/regulator
Crane 1.6 roller rockers
Accel electronic ignition
MAC long tube headers
Summit balancer
A good Tune!!
Any idea why the curves have that sudden jump in the 5100 - 5300 rpm range? Or maybe I should be asking why does the torque curve have a sag in the midrange?

I'd happily give away a few ponies off the 230.7 HP peak in exchange for filling in that valley in the torque curve between 4000 and 5150. I have an idea what I'd tinker with if it was EFI, but don't really know how to tweak only a specific range with a carb (it's got to be deeper into the carb tuning than just jetting/power valve/accelerator pump tuning; maybe it involves emulsion tubes or air bleeds).


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Old 12-02-2009, 04:33 PM   #16
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Quote:
Originally Posted by Norm Peterson View Post
Any idea why the curves have that sudden jump in the 5100 - 5300 rpm range? Or maybe I should be asking why does the torque curve have a sag in the midrange?

I'd happily give away a few ponies off the 230.7 HP peak in exchange for filling in that valley in the torque curve between 4000 and 5150. I have an idea what I'd tinker with if it was EFI, but don't really know how to tweak only a specific range with a carb (it's got to be deeper into the carb tuning than just jetting/power valve/accelerator pump tuning; maybe it involves emulsion tubes or air bleeds).


Norm
My tuner and I talked about it, and our conclusion was it might have something to do with the timing. I've got an Accel Billetproof distributor with a combo vacuum/spring advance setup. Unfortunately, at the time the car was on the dyno we didn't have enough different spring combos to work on it further. We did re-jet, change the vacuum secondary opening rate and changed the power pump rate to get it where it is. I had to go down 2 jets on the secondaries, open the secondaries slower and slow down the power pump squirt to fix the a/f ratio issues we had out of the box. The car was dumping fuel and going way rich on initial tip in, then going lean as hell before the secondaries kicked in, then went rich again. When we slowed down the power pump rate, it fixed the initial tip in, but still went lean as the secondaries kicked in and then went rich. We downjetted the secondaries and slowed the opening of the secondaries which got us to a reasonably smooth a/f ratio curve. The drop and bump in the curve was there pretty much all the time, so we're leaning towards the springs in the distributor not expanding linearly.
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Old 12-05-2009, 11:57 PM   #17
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hijacked this thread to its death
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Old 12-06-2009, 07:11 PM   #18
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i am hoping for 350-360 flywheel hp out of my 289

but thats with performer rpm heads, performer rpm intake, stiff cam, roller rockers, hooker super comp long tubes, and some other odds and ends
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Old 12-07-2009, 09:51 AM   #19
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with all the 289's out there that all the response i get????? anyone else??
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Old 12-07-2009, 10:39 AM   #20
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I wouldn't think that a lot of people have taken theirs to the Dyno.
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Old 12-07-2009, 10:39 AM
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