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Old 12-11-2010, 10:52 PM   #1 (permalink)
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Default Upgrades to make the most of my 289

I've been debating with myself whether or not to upgrade from my 289 to the new Ford Racing 306...or to even stroke it to 331 or 347.

But I'm a bit nostalgic, so I've decided I'm going to stick with my original 289 until it takes a crap on me (and then upgrade to one of the above).
Besides, my 289 is still healthy and runs good. BUT, I'd like it to run GREAT!

Right now It's running the Edelbrock 4bbl HiPo intake and Edelbrock thunder series 650 carb. Still needs a couple things though...

1.) I still have the original "Iron Lung" heads in there. I'd like some opinions on some new Alum. ones.

2.) Headers... Yes, I'm still sporting the original exhaust manifolds. HA! I attempted some Ford Racing Shorty's back when i was a teen, and they wouldn't fit between the block and the shock-towers. ...Since the insides of the manifolds were still clean, i threw them back on and let it be...

Recommendations?
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Old 12-11-2010, 11:05 PM   #2 (permalink)
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Save some $$$ and get the 306. Sounds like your nostalgia is running out pretty quick
Plus, you get to keep the 289 for the future.

By the time you get done doing heads you'll be into it for what? About 2k? The 306 is around 3k. More power for sure and peace of mind in a fresh motor. I think they are rated at 340 hp.

I've been having the same dilemma for the past yeaevand a half ... I'm leaning towards the 306. (probably doing a T5 swap at the same time)

Just to clarify, I said 'save some $$'... I'm saying that the costs are close. But if you go with the heads then why not a cam? Timing chain too, litters,rockers, by the time you're done you'll be making 300hp at a cost of over $3k.

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Old 12-11-2010, 11:11 PM   #3 (permalink)
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Quote:
Originally Posted by Black65 View Post
Sounds like your nostalgia is running out pretty quick
Haha

Yeah, that 306 is rated at 340hp. Not too shabby. And you're right, I've heard people tell me if i stick with 289 it will be a more difficult/expensive route. ...ugh..
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Old 12-11-2010, 11:17 PM   #4 (permalink)
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Ha ha!! Hey, if you do it so will I!! (306 that is)
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Old 12-12-2010, 10:18 AM   #5 (permalink)
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Either way, you will always want more power in the end.
I just built a warm 289. I didnt save any money building myself.
I had a blast and learned a lot. Now when I drive it, I have a huge sense of satisfaction.
I dont know how you could put a value on that.

I still need to put in the Tri-Ys hanging in the garage.
Many disagree, but I like the 289 heads. Shelby used them and they make enough power for my street cruiser.
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Old 12-12-2010, 10:33 AM   #6 (permalink)
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sell the 289 and buy horsepower.....you wont be happy unless you have it
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Old 12-12-2010, 12:01 PM   #7 (permalink)
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Quote:
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sell the 289 and buy horsepower.....you wont be happy unless you have it
+1 If I had a little more cash and a lot more wisdom, I would have bought the 306.
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Old 12-12-2010, 12:10 PM   #8 (permalink)
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what 306 is rated at 340 hp ? are you talking about a crate motor ?
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Old 12-12-2010, 12:14 PM   #9 (permalink)
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You can do a lot with what you have. You'll need to port-match your exhaust. Cost- A gasket set. Freer-breathing heads will allow full advantage of a camshaft upgrade. A fellow near here used Edelbrock Performer RPM intake, Edelbrock 600 cfm carb, C9OZ-6250-C "hydraulic HiPo" cam, recurved stock distributor, and home port-matched stock heads. Turned 321 hp on the dyno. Accomplishing this would cost you around $300 complete, and take a weekend.

289/302 Cylinder Head Port Matching
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Old 12-13-2010, 09:43 AM   #10 (permalink)
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How much RPM can the short block handle? You think it can spin to 6000 with no problem?

You have to take this into consideration when you start talking heads and cams. This is the slippery slope. People want HP which means revs on a small motor like a 289. This means upgrading the bottom end, etc., etc.

Just go ahead and get a 347. No subsitute for cubic inches.
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Old 12-13-2010, 10:50 AM   #11 (permalink)
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A speed shop near here sells shot-peened stock 289 rods with upgraded bolts, they guarantee them to 7000 rpm. The cam I mentioned will go up to 6k no problem. Here's a dyno card from a 67 289 with port-matched iron heads and a C9OZ-C cam. Bottom-end strength in 289's has never been a problem.

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Old 12-14-2010, 07:10 AM   #12 (permalink)
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Quote:
How much RPM can the short block handle? You think it can spin to 6000 with no problem?
They have been spun much higher then that and stayed together. Like 22gt said, shot peen them and put in ARP rod bolts and they should be good for over 7k rpms. The short rod length and stroke does not put a whole lot of stress on this engine.
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Old 12-14-2010, 07:37 AM   #13 (permalink)
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Quote:
Originally Posted by 68_GT View Post
what 306 is rated at 340 hp ? are you talking about a crate motor ?
Ford Racing Performance Parts

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Old 12-14-2010, 07:51 AM   #14 (permalink)
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I can relate to the op and power quest. Im still with my original 289. I put in a 10 inch 3000 stall converter and am going to do the port work 22Gt mentioned and put in a Voodoo cam and Rpm intake after the first of the year.
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Old 12-14-2010, 09:28 AM   #15 (permalink)
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Problem is that if you build a 289 to make power at 7000 the low end response is going to be awful. You can't have your cake and eat it too.

The odds are good that he has a 3.00 or 2.79 rear gear. If so that will have to go to a 3.90 or higher to get it rolling.

The 289 HiPo in my 67 GT350 had a big cam in it. Had to launch it at 3000+ to get it into the power band. Took 3.89 gears to get it there which sucked on the highway. And no fun putting around town.

And if you are going to get into the bottom end and change rods then why not stroke it? No one can tell from the outside.
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