engine upgrades

6FIVE_STANG · Jul 3, 2006

right now i have a 289 with a edelbrock performer intake, holley street avenger carb. what other stuff can i do to it to get a lot of horsepower. i want a daily driver but i want to get about 325hp+. so my question is what are some good combos that i can get for my engine. i was thinking about making it a stroker 347? what should i do?

washMO66 · Jul 3, 2006

that 289 is a perfect candidate for 325hp and lots of high revving fun, I would look into a camshaft upgrade or a CAM / intake matched kit assuming that everything on the bottom end is in good working order.

I would consider maybe going to a Performer RPM and ditch the street avenger (I had one that really was restricting the performance of my engine) don't over size the carb, err to the small and you will have better throttle response, maybe a little less up top but not noticable unless you are racing for timeslips at the track.....

mustangdave · Jul 3, 2006

You need to stroke it with good aluminum heads, upgraded cam, better intake, and catb.
You have a good carb. for now but that intake is just a stock replacement. Go with Edelbrocks RPM Air Gap; it will work now and later with upgrades for more power than you'll ever make. Heads are the major ticket item and should be done while upgrading the cam Figure at least $2200 for that part. Heads such as AFR sized properly can add up to 50 ponies. Of course, good headers and dual exhaust help a little.

D.Hearne · Jul 3, 2006

The Shelby version of the 289 Hi-po motor basically had a high rise dual plane intake ( Ford's A321 is the current incarnation of that one) A 715 cfm Holley, Tri-Y headers, dual exhaust and a hotter solid lift cam. 306Hp at the flywheel. Swap your intake for the A321 or Performer RPM (that's a dead heat as to which is better, both are good) Go with a hydraulic cam in the .500 lift/270 degree advertised duration, install headers and your basically there, even with the stock heads. A 347 will set you back at least 4 grand. Not to mention, if you have not done any suspension or brake upgrades, you're gonna need that too.(that should be done anyway) If you've got an automatic trans, you'll need to spend money there too with a 347.

180 Out · Jul 3, 2006

I thought a 347 was a bad idea with a 289 block, because the cylinder skirts don't extend as far as with the 302. Is this not so?

If not, who has a good deal on a 347 kit for a 289?

88stanggonebad · Jul 3, 2006

from my understanding 302's and 289 were the same block, only diffrence beign the 289 was a de-stroked version of the 302, but i could be wrong. propowerperf.com has cheap stroker kits if you can put it together and do all the work needed.

D.Hearne · Jul 3, 2006

You got it backwards, the 302 was a stroked version of the 289.D the 289 came first ) Be that as it may, some say the cylinder bores are a tad longer on 302 blocks, some say not. The difference if any isn't much. I'd lean toward a 331 instead. If you're going for the cubes of a 347, it's just as easy to swap in a 351W. And you won't have the durability problems

washMO66 · Jul 3, 2006

D.Hearne said:
You got it backwards, the 302 was a stroked version of the 289.D the 289 came first ) Be that as it may, some say the cylinder bores are a tad longer on 302 blocks, some say not. The difference if any isn't much. I'd lean toward a 331 instead. If you're going for the cubes of a 347, it's just as easy to swap in a 351W. And you won't have the durability problems

Your killing me D. The whole 347 durability / oil return / or whatever the latest problem is I think is a myth. I ask every person I know if they have had any issues with their 347 and the answer is no. Mine was built in 02 and has never had any issues. Had it freshened this past year by Jerry Sifford Racing Engines, just a ring and bearing job and a CAM swap and he said the motor looked flawless (other than the lobes on the XE274HR were starting to wear down).

I think if your engine is properly planned out with the right parts and put together right it will last 331 or 347. I don't know if this made a difference but the entire inner surface of my block was smoothed to speed oil return.

I know you will give me the facts of why there is durability problems and make no mistake I respect your knowledge (far beyond what I know for sure) but I think this issue has just been over rumored on the web.....

mysterystang · Jul 5, 2006

just go for the 347, with todays technology, durability wont be a big problem

xoxbxfx · Jul 5, 2006

washMO66 said:
Your killing me D. The whole 347 durability / oil return / or whatever the latest problem is I think is a myth. I ask every person I know if they have had any issues with their 347 and the answer is no. Mine was built in 02 and has never had any issues. Had it freshened this past year by Jerry Sifford Racing Engines, just a ring and bearing job and a CAM swap and he said the motor looked flawless (other than the lobes on the XE274HR were starting to wear down).

I think if your engine is properly planned out with the right parts and put together right it will last 331 or 347. I don't know if this made a difference but the entire inner surface of my block was smoothed to speed oil return.

I know you will give me the facts of why there is durability problems and make no mistake I respect your knowledge (far beyond what I know for sure) but I think this issue has just been over rumored on the web.....

i know of a couple crack blocked 347's... Takin them that far out is just pushing the limits of a stock block. The cyl walls are not very thick. Besides 331 has a better rod to stroke ratio

D.Hearne · Jul 5, 2006

washMO66 said:
Your killing me D. The whole 347 durability / oil return / or whatever the latest problem is I think is a myth. I ask every person I know if they have had any issues with their 347 and the answer is no. Mine was built in 02 and has never had any issues. Had it freshened this past year by Jerry Sifford Racing Engines, just a ring and bearing job and a CAM swap and he said the motor looked flawless (other than the lobes on the XE274HR were starting to wear down).

I think if your engine is properly planned out with the right parts and put together right it will last 331 or 347. I don't know if this made a difference but the entire inner surface of my block was smoothed to speed oil return.

I know you will give me the facts of why there is durability problems and make no mistake I respect your knowledge (far beyond what I know for sure) but I think this issue has just been over rumored on the web.....

While I don't dissagree completely, It's safe to say that anytime you max a out a stock block in terms of bore and stroke, you've potentially shortened the life span of that engine. I don't see the point in doing a 347 where a 351W will fit easily in the place of a 289/302. If you expected a long life for your 347, why the refreshing? (don't take that the wrong way, but I HAD to ask ) Take a 302 and a 347, fill them with similar parts, put both on a dyno and run them side by side and I'd bet on the 347 quiting before the 302. That's my reasoning in suggesting a 351W over a 347. Now in a Ranger swap? the 347 would get my nod, simply due to it's external dimensions, the extra deck height of the Windsor complicates things there where it doesn't in a Classic Stang.

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